Process to study changes in gene expression in granulocytic cells

Abstract

The present invention comprises a method to identify granulocytic cell genes that are differentially expressed upon exposure to a pathogen or in a sterile inflammatory disease by preparing a gene expression profile of a granulocytic cell population exposed to a pathogen or isolated from a subject having a sterile inflammatory disease and comparing that profile to a profile prepared from quiescent granulocytic cells. The present invention is particularly useful for identifying cytokine genes, genes encoding cell surface receptors and genes encoding intermediary signaling molecules. The invention also includes methods to identify a therapeutic agent that modulates the expression of at least one gene in a granulocyte population. Genes which are differentially expressed during neutrophil contact with a pathogen, such as a virulent bacteria, or that are differentially expressed in a subject having a sterile inflammatory disease are of particular importance.

Description

This application is related to application Ser. No. 08/510,032, Ser. No. 60/056,844 and application Ser. No. 08/688,514, all of which are herein incorporated by reference in their entirety. All published articles, patents and other publications cited throughout this application are herein incorporated by reference in their entirety.

TECHNICAL FIELD

This invention relates to compositions and methods useful to identify agents that modulate the response of granulocytes to inflammatory and infectious conditions.

BACKGROUND OF THE INVENTION

Granulocytes (i.e., neutrophils, eosinophils and basophils) are involved in the immune response elicited by inflammation and infection.

Inflammation

Inflammation is a localized protective response elicited by injury or destruction of tissues which serves to destroy, dilute or wall off both the injurious agent and the injured tissue. It is characterized by fenestration of the microvasculature, leakages of the elements of blood into the interstitial spaces, and migration of leukocytes into the inflamed tissue. On a macroscopic level, this is usually accompanied by the familiar clinical signs of erythema, edema, tenderness (hyperalgesia), and pain. During this complex response, chemical mediators such as histamine, 5-hydroxytryptamine, various chemotactic factors, bradykinin, leukotrienes, and prostaglandins are released locally. Phagocytic cells migrate into the area, and cellular lysosomal membranes may be ruptured, releasing lytic enzymes. All of these events may contribute to the inflammatory response.

Inflammation is initiated by, among other things, trauma, tissue necrosis, infection or immune reactions. The immediate response is temporary vasoconstriction. Vasoconstriction is followed within seconds by the acute vascular response resulting in increased blood flow (hyperemia) and edema. The acute phase is also characterized by the margination of polymorphonuclear white blood cells (neutrophils) next to endothelial cells, followed by emigration of neutrophils into the adjacent tissue. Margination is recognized by the lining up of neutrophils along the endothelium of vessels. Emigration occurs by passage of the inflammatory cells between endothelial cells.

Neutrophils

Neutrophils are the first wave of cellular attack on invading organisms and are the characteristic cells of acute inflammation. The appearance of neutrophils in areas of inflammation may be caused by chemicals released from bacteria, factors produced nonspecifically from necrotic tissue or antibody reacting with antigen. Neutrophils use an actin-rich cytoskeleton to move in a directed manner along a chemotactic gradient from the bloodstream to an inflammatory site where they ingest particles (e.g,. bacteria) and immune complexes bearing IgG (via FcR) and/or breakdown products of the complement component C3.

Neutrophils belong to a category of white blood cells known as polymorphonuclear white blood cells. The blood cells with single nuclei (mononuclear cells) form the white blood cell population that includes macrophages, T and B cells. White blood cells that contain segmented nuclei are broadly classified as polymorphonuclear. Polymorphonuclear white blood cells (or “granulocytes”) are further subdivided into three major populations on the basis of the staining properties of their cytoplasmic granules in standard hematologic smears or tissue preparations: neutrophils staining pink, eosinophils staining red and basophils staining blue.

Neutrophils (also referred to as polymorphonuclear neutrophils-PMNs) make up 50% to 70% of the white blood cells (WBCs) of the peripheral blood and may be found scattered diffusely in many tissues, although they are most frequently found in areas of acute inflammation or acute necrosis. Like other WBCs, neutrophils are produced from precursor cells in the bone marrow and released into the blood when mature. After entering the circulation, neutrophils are thought to last only 1 or 2 days.

Neutrophils are characterized by numerous cytoplasmic granules that contain highly destructive enzymes that must be kept isolated from the cytoplasm. These granules contain a number of oxygen-independent enzymes as well as oxygen-dependent mechanisms of killing. Upon attraction to sites of inflammation, neutrophils attempt to engulf and digest bacteria coated with antibody and complement. Phagocytosis by neutrophils is also usually accompanied by release of the lysosomal enzymes into the tissue spaces, particularly if the organism is difficult for the neutrophil to digest.

At least three cytoplasmic granules are identifiable in neutrophils: specific granules containing lactoferrin, B cytochrome, the complement receptor CR3 and β2-integrin; azurophilic granules containing acid hydrolases and other enzymes; and a third granule containing gelatinase.

In addition to the role neutrophils and other granulocytic cells play in immune response to pathogens, including bacterial infection, neutrophils and other granulocytic cells play an unwanted role in many chronic inflammatory diseases. There are many disease states in which excessive or unregulated granulocytic cell infiltration and activation are implicated in exacerbating and/or causing the disease. For instance, many inflammatory diseases are characterized by massive neutrophil infiltration, such as psoriasis, inflammatory bowel disease, Crohn's disease, asthma, cardiac and renal reperfusion injury, adult respiratory distress syndrome, rheumatoid arthritis, thrombosis and glomerulonephritis. All of these diseases are associated with increased IL-8 production which may be responsible for the chemotaxis of neutrophils into the inflammatory site.

While the role of neutrophil infiltration and activation in inflammation is well known, the biosynthetic responses of neutrophils to pathogens, chemotactic agents, proinflammatory molecules, etc. are not as well understood. Neutrophils were once thought to be in a state of terminal differentiation, thereby lacking biosynthetic ability. This view is consistent with the relative scarcity in mature circulating neutrophils of ribosomes and endoplasmic reticulum and with the ability of neutrophils to ingest particles when RNA and/or protein synthesis has been inhibited. More recently it has been demonstrated that neutrophils perform more active roles in their response to environmental stimuli.

It has thus recently been established that neutrophils synthesize de novo important macromolecules including, but not limited to interleukin (IL) 1, I1-6, I1-8, tumor necrosis factor (TNFα), granulocyte and macrophage colony-stimulating factors, interferon α (IFNα), intercellular adhesion molecule (ICAM-1) and membrane and cystoskeletal molecules, such as major histocompatibility class I antigens and actin (Beaulieu et al (1992) J. Biolog. Chem. 267(1):426-432; Arnold et al. (1993) Infect. Immun. 61(6):2545-2552; and Elsner et al. (1995) Immunobiol 193:456-464). No study, however, has taken a systematic approach to assess the transcriptional response during neutrophil activation via contact with a pathogen or from neutrophils isolated from a subject with a sterile inflammatory disease.

Eosinophils and Basophils

Eosinophils are another granulocytic or polymorphonuclear white blood cell that are involved in the inflammatory response. Eosinophils are found predominately in two types of inflammation: allergy and parasite infections.

The role of eosinophils in the host response to parasites is thought to be mediated through the components of the eosinophilic granules. Eosinophils are cytotoxic to schistosome larvae through an antibody-dependent cell-mediated mechanism. Eosinophil cationic proteins are highly toxic for schistosomes and may be responsible for binding of eosinophils to parasitic worms as well as fragmentation of the parasite.

The role of eosinophils in acute inflammation is not fully understood. On one hand, there is evidence that enzymes in eosinophils may serve to limit the extent of inflammation by neutralizing mediators of anaphylaxis, such as LTC4, histamine and platelet-activating factor. On the other hand, there is increasing evidence that cationic proteins in eosinophilic granules are mediators of acute inflammation. Eosinophil activation is associated with acute tissue injury and cause an intense vasoconstriction in lung microvasculature, followed by increased pulmonary vascular permeability and pulmonary edema.

Basophils or mast cells are the other major cell type characterized as a granulocytic or polymorphonuclear white blood cell. Mast cells contain granules with a variety of biologically active agents which, when released extracellularly (degranulation), cause dilation of the smooth muscle of arterioles (vasodilation), increased blood flow, and contraction of endothelial cells, thereby opening up vessel walls to permit egress of antibodies, complement or inflammatory cells into tissue spaces.

SUMMARY OF THE INVENTION

While the role of neutrophils and other granulocytic cells in inflammation and/or the immunological response to infection has been the subject of intense study, little is known about the global transcriptional response of granulocytes during cell activation. The present inventors have devised an approach to systematically assess the transcriptional response from granulocytic cells activated through contact with a pathogen or from granulocytic cells isolated from a subject with a sterile inflammatory disease.

The present invention includes a method to identify granulocytic cell genes that are differentially expressed upon exposure to a pathogen by preparing a gene expression profile of a granulocytic cell population exposed to a pathogen and comparing that profile to a profile prepared from quiescent granulocytic cells. cDNA species, and therefore genes, which are expressed de novo upon neutrophil contact with a pathogen are thereby identified. The present invention is particularly useful for identifying cytokine genes, genes encoding cell surface receptors and genes encoding intermediary signaling molecules.

The present invention also includes a method to identify granulocytic cell genes that are differentially expressed in response to a sterile inflammatory disease by preparing a gene expression profile of a granulocytic cell population isolated from a subject exhibiting the symptoms of a sterile inflammatory disease and comparing that profile to a profile prepared from granulocytic cells isolated from a normal granulocytic cell population. cDNA species, and therefore genes, which are differentially expressed in the granulocytic cells of a subject exhibiting the symptoms of a sterile inflammatory disease are thereby identified.

The present invention also includes a method to identify granulocytic cell genes that are differentially expressed upon exposure of a granulocytic cell population to an agonist (pro-inflammatory molecule) by preparing a gene expression profile of a granulocytic cell population contacted with an agonist and comparing that profile to a profile prepared from noncontacted granulocytic cells, thereby identifying cDNA species, and therefore genes, which are expressed de novo in the granulocytic cells contacted with the agonist are thereby identified.

The present invention further includes a method to identify a therapeutic or prophylactic agent that modulates the response of a granulocyte population to a pathogen, comprising the steps of preparing a first gene expression profile of a quiescent granulocyte population, preparing a second gene expression profile of a granulocyte population exposed to a pathogen, treating said exposed granulocyte population with the agent, preparing a third gene expression profile of the treated granulocyte population, comparing the first, second and third gene expression profiles and identifying agents that modulate the response of a granulocyte population to the pathogen.

Another aspect of the invention is a method to identify a therapeutic agent that modulates the expression of genes in a granulocyte population found in a subject having Another aspect of the invention includes a method to identify a therapeutic or prophylactic agent that modulates the response of a granulocyte cell population in a subject having a sterile inflammatory disease, comprising the steps of preparing a first gene expression profile of a granulocyte population in a subject having a sterile inflammatory disease, treating the granulocyte population with the agent, preparing a second gene expression profile of the treated granulocyte population, comparing the first and second gene expression profiles with the gene expression profile of a normal granulocyte population and identifying agents that modulate the expression of genes whose transcription levels are altered in the granulocyte population of the subject as compared with normal granulocyte population.

A further aspect of the present invention is a method to identify a therapeutic or prophylactic agent that modulates the response of a granulocytic population to an agonist (pro-inflammatory molecule), comprising the steps of preparing a first gene expression profile of a quiescent granulocyte population, preparing a second gene expression profile of a granulocyte population exposed to an agonist, treating the exposed granulocyte population with the agent, preparing a third gene expression profile of the treated granulocyte population, comparing the first, second and third gene expression profiles and identifying agents that modulate the response of a granulocytic population exposed to an agonist.

The present invention also includes a method of diagnosing the exposure of a subject to a pathogen, comprising the steps of preparing a first gene expression profile of a granulocyte population from the subject, comparing the first gene expression profile to a second gene expression profile of a granulocyte population exposed to that pathogen and to a third gene expression profile of a normal granulocyte preparation and diagnosing whether the subject has been exposed to a pathogen.

Another aspect of the invention includes a method of diagnosing a sterile inflammatory disease in a subject, comprising the steps of preparing a first gene expression profile of a granulocyte population from the subject, comparing the first gene expression profile to at least one second gene expression profile from a granulocyte population from a subject having a sterile inflammatory disease and to a third gene expression profile of a normal granulocyte preparation and thereby determining if the subject has a sterile inflammatory disease.

The present invention also includes a method of identifying new bacterial virulence factor genes by preparing a first gene expression profile of a quiescent granulocyte population, preparing a second gene expression profile of a granulocyte population exposed to a virulent or avirulent bacterial strain, preparing a third gene expression profile from a granulocyte population exposed to a bacterial strain with a mutation in a putative bacterial virulence factor gene, comparing the first, second and third gene expression profiles and identifying a bacterial virulence factor gene.

Another aspect of the invention is a composition comprising a grouping of nucleic acids that correspond to at least a part of one or more of the genes whose expression levels are modulated in a granulocyte population that has been exposed to a pathogen, these nucleic acids being affixed to a solid support.

Lastly, an aspect of the invention is a composition comprising a grouping of nucleic acids that correspond to at least part of one or more genes whose expression levels are modulated in a granulocyte population found in a subject having a sterile inflammatory disease, these nucleic acids being affixed to a solid support.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 FIG. 1 is an autoradiogram of the expression profile generated from cDNAs made with RNA isolated from neutrophils exposed to avirulent Escherichia coli and virulent and avirulent Yersinia pestis.

FIG. 2 FIG. 2 is an autoradiogram of the expression profile generated from cDNAs made with RNA isolated from neutrophils exposed to virulent and avirulent E. coli, virulent and avirulent Y. pestis, LPS, GM-CSF, TNFα, or γIFN.

FIG. 3 FIG. 3 is an autoradiogram of the expression profile generated from cDNAs made with RNA isolated from neutrophils exposed to avirulent E. coli and virulent and avirulent Y. pestis. All possible 12 anchoring oligo d(T)n1, n2 were used to generate a complete expression profile for the enzyme BglII.

FIG. 4 FIG. 4 represents a summary of genes which are differentially expressed in neutrophils upon exposure to virulent and avirulent E. coli and Y. pestis.

FIG. 5 FIG. 5 is an autoradiogram of the expression profile generated from cDNAs made with RNA isolated from neutrophils exposed to avirulent E. coli and virulent and avirulent Y. pestis. All possible 12 anchoring oligo d(T)n1, n2 were used to generate a complete expression profile for the enzyme BamHI.

FIG. 6 is a section of an autoradiogram showing the differences in band intensity for 2 mRNA species when neutrophils are exposed to avirulent E. coli and virulent and avirulent Y. pestis.

MODES OF CARRYING OUT THE INVENTION

General Description

The response of neutrophils to pathogens, including bacterial pathogens, is a subject of primary importance in view of the need to find ways to modulate the immune response to infection. Similarly, the response of neutrophils to agonists (pro-inflammatory molecules) is a subject of primary importance in view of the need to find better ways of controlling inflammation in various disease states. One means of assessing the response of neutrophils to pathogens and agonists is to measure the ability of neutrophils to synthesize specific RNA de novo upon contact with the pathogen or agonist.

The following discussion presents a general description of the invention as well definitions for certain terms used herein.

Definitions

Granulocytic cells, also known as polymorphonuclear white blood cells, include neutrophils, also known as polymorphonuclear neutrophils or peripheral blood neutrophils, eosinophils, and basophils, also referred to a mast cells.

The term “pathogen” refers to any infectious organism including bacteria, viruses, parasites, mycoplasma, protozoans, and fungi (including molds and yeast). Pathogenic bacteria include, but are not limited to Staphylococci (e.g. aureus), Streptococci (e.g. pneumoniae), Clostridia (e.g. perfringens), Neisseria (e.g. gonorrhoeae), Enterobacteriaceae (e.g. coli as well as Klebsiella, Salmonella, Shigella, Yersinia and Proteus), Helicobacter (e.g. pylori), Vibrio (e.g. cholerae), Campylobacter (e.g. jejuni), Pseudomonas (e.g. aeruginosa), Haemophilus (e.g. influenzae), Bordetella (e.g. pertussis), Mycoplasma (e.g. pneumoniae), Ureaplasma (e.g. urealyticum), Legionella (e.g. pneumophila), Spirochetes (e.g. Treponema, Leptospira and Borrelia), Mycobacteria (e.g. tuberculosis, smegmatis), Actinomyces (e.g. (israelii), Nocardia (e.g. asteroides), Chlamydia (e.g. trachomatis), Rickettsia, Coxiella, Ehrilichia, Rochalimaea, Brucella, Yersinia, Fracisella, and Pasteurella.

The term “sterile inflammatory disease” refers to any inflammatory disease caused by immune or nonimmune mechanisms not directly linked to infection (see Stewart et al.). Examples of sterile inflammatory diseases include, but are not limited to psoriasis, rheumatoid arthritis, glomerulonephritis, asthma, cardiac and renal reperfusion injury, thrombosis, adult respiratory distress syndrome, inflammatory bowel diseases such as Crohn's disease and ulcerative colitis and periodontal disease.

The phrase “solid support” refers to any support to which nucleic acids can be bound or immobilized, including nitrocellulose, nylon, glass, other solid supports which are positively charged and nanochannel glass arrays disclosed by Beattie (WO 95/1175).

The phrase “gene expression profile”, also referred to as a “differential expression profile” or “expression profile” refers to any representation of the expression of at least one mRNA species in a cell sample or population. For instance, a gene expression profile can refer to an autoradiograph of labeled cDNA fragments produced from total cellular mRNA separated on the basis of size by known procedures. Such procedures include slab gel electrophoresis, capillary gene electrophoresis, high performance liquid chromatography, and the like. Digitized representations of scanned electrophoresis gels are also included as are two and three dimensional representations of the digitized data.

While a gene expression profile encompasses a representation of the expression level of at least one mRNA species, in practice, the typical gene expression profile represents the expression level of multiple mRNA species. For instance, a gene expression profile useful in the methods and compositions disclosed herein represents the expression levels of at least about 5, 10, 20, 50, 100, 150, 200, 300, 500, 1000 or more preferably, substantially all of the detectable mRNA species in a cell sample or population. Particularly preferred are gene expression profiles or arrays affixed to a solid support that contain a sufficient representative number of mRNA species whose expression levels are modulated under the relevant infection, disease, screening, treatment or other experimental conditions. In some instances a sufficient representative number of such mRNA species will be about 1, 2, 5, 10, 15, 20, 25, 30, 40, 50, 50-75 or 100.

Gene expression profiles can be produced by any means known in the art, including, but not limited to the methods disclosed by: Liang et al. (1992) Science 257:967-971; Ivanova et al. (1995) Nucleic Acids Res. 23:29542958; Guilfoyl et al. (1997) Nucleic Acids Res. 25(9):1854-1858; Chee et al. (1996) Science 274:610-614; Velculescu et al. (1995) Science 270:484-487; Fischer et al. (1995) Proc. Natl. Acad. Sci. USA 92(12):5331-5335; and Kato (1995) Nucleic Acids Res. 23(18):3685-3690. Preferably, and Prashar et al. (1996) Proc. Natl. Acad. Sci. USA 93:659-663.

As an example, gene expression profiles as described herein are made to identify one or more genes whose expression levels are modulated in a granulocytic cell population exposed to a pathogen or isolated from a subject having a sterile inflammatory disease. The assaying of the modulation of gene expression via the production of a gene expression profile generally involves the production of cDNA from polyA RNA (mRNA) isolated from granulocytes as described below.

The mRNAs are isolated from a granulocytic cell source. The cells may be obtained from an in vivo source, such as a peripheral blood. As is apparent to one skilled in the art, any granulocytic cell type may be used, however, neutrophils are preferred. Furthermore, the peripheral blood cells that are initially obtained may be subjected to various separation techniques (e.g., flow cytometry, density gradients).

mRNAs are isolated from cells by any one of a variety of techniques. Numerous techniques are well known (see e.g., Sambrook et al., Molecular Cloning: A Laboratory Approach, Cold Spring harbor Press, NY, 1987; Ausubel et., Current Protocols in Molecular Biology, Greene Publishing Co. NY, 1995). In general, these techniques first lyse the cells and then enrich for or purify RNA. In one such protocol. Cells are lysed in a Tris-buffered solution containing SDS. The lysate is extracted with phenol/chloroform, and nucleic acids are precipitated. Purification of poly(A)—containing RNA is not a requirement. The mRNAs may, however, be purified from crude preparations of nucleic acids or from total RNA by chromatography, such as binding and elution from oligo(dT)-cellulose or poly(U)-Sepharose®. As stated above, other protocols and methods for isolation of RNAs may be substituted.

The mRNAs are reverse transcribed using an RNA-directed DNA polymerase, such as reverse transcriptase isolated from AMV, MoMuLV or recombinantly produced. Many commercial sources of enzyme are available (e.g., Pharmacia, New England Biolabs, Stratagene Cloning Systems). Suitable buffers, cofactors, and conditions are well known and supplied by manufacturers (see also, Sambrook et al., supra; Ausubel et al., supra).

Various oligonucleotides are used in the production of cDNA. In particular, the methods utilize oligonucleotide primers for cDNA synthesis, adapters, and primers for amplification. Oligonucleotides are generally synthesized so single strands by standard chemistry techniques, including automated synthesis. Oligonucleotides are subsequently de-protected and may be purified by precipitation with ethanol, chromatographed using a sized or reversed-phase column, denaturing polyacrylamide gel electrophoresis, high-pressure liquid chromatography (HPLC), or other suitable method. In addition, within certain preferred embodiments, a functional group, such as biotin, is incorporated preferably at the 5′ or 3′ terminal nucleotide. A biotinylated oligonucleotide may be synthesized using pre-coupled nucleotides, or alternatively, biotin may be conjugated to the oligonucleotide using standard chemical reactions. Other functional groups, such as florescent dyes, radioactive molecules, digoxigenin, and the like, may also be incorporated.

Partially-double stranded adaptors are formed from single stranded oligonucleotides by annealing complementary single-stranded oligonucleotides that are chemically synthesized or by enzymatic synthesis. Following synthesis of each strand, the two oligonucleotide strands are mixed together in a buffered salt solution (e.g., 1 M NaCl, 100 mM Tris-HCl pH.8.0, 10 mM EDTA) or in a buffered solution containing Mg² (e.g., 10 mM MgCl₂) and annealed by heating to high temperature and slow cooling to room temperature.

The oligonucleotide primer that primes first strand DNA synthesis comprises a 5′ sequence incapable of hybridizing to a polyA tail of the mRNAs, and a 3′ sequence that hybridizes to a portion of the polyA tail of the mRNAs and at least one non-polyA nucleotide immediately upstream of the polyA tail. The 5′ sequence is preferably a sufficient length that can serve as a primer for amplification. The 5′ sequence also preferably has an average G+C content and does not contain large palindromic sequence; some palindromes, such as a recognition sequence for a restriction enzyme, may be acceptable. Examples of suitable 5′ sequences are

• CTCTCAAGGATC:TACCGCT (SEQ ID No. ______),
• CAGGGTAGACGACGCTACGC (SEQ ID No. ______), and
• TAATACCGCGCCACATAGCA (SEQ ID No. ______).

The 5′ sequence is joined to a 3′ sequence comprising sequence that hybridizes to a portion of the polyA tail of mRNAs and at least one non-polyA nucleotide immediately upstream. Although the polyA-hybridizing sequence is typically a homopolymer of dT or dU, it need only contain a sufficient number of dT or dU bases to hybridize to polyA under the conditions employed. Both oligo-dT and oligo-dU primers have been used and give comparable results. Thus, other bases may be interspersed or concentrated, as long as hybridization is not impeded. Typically, 12 to 18 bases or 12 to 30 bases of dT or dU will be used. However, as one skilled in the art appreciates, the length need only be sufficient to obtain hybridization. The non-polyA nucleotide is A, C, or G, or a nucleotide derivative, such as inosinate. If one non-polyA nucleotide is used, then three oligonucleotide primers are needed to hybridize to all mRNAs. If two non-polyA nucleotides are used, then 12 primers are needed to hybridize to all mRNAs (AA, AC, AG, AT, CA, CC, CG, CT, GA, GC, GG, GT). If three non-poly A nucleotides are used then 48 primers are needed (3×4×4). Although there is no theoretical upper limit on the number of non-polyA nucleotides, practical considerations make the use of one or two non-polyA nucleotides preferable.

For cDNA synthesis, the mRNAs are either subdivided into three (if one non-polyA nucleotide is used) or 12 (if two non-polyA nucleotides are used) fractions, each containing a single oligonucleotide primer, or the primers may be pooled and contacted with a mRNA preparation. Other subdivisions may alternatively be used. Briefly, first strand cDNA is initiated from the oligonucleotide primer by reverse transcriptase (RTase). As noted above, RTase may be obtained from numerous sources and protocols are well known. Second strand synthesis may be performed by RTase (Gubler and Hoffman, Gene 25: 263, 1983), which also has a DNA-directed DNA polymerase activity, with or without a specific primer, by DNA polymerase 1 in conjunction with RNaseH and DNA ligase, or other equivalent methods. The double-stranded cDNA is generally treated by phenol:chloroform extraction and ethanol precipitation to remove protein and free nucleotides.

Double-stranded cDNA is subsequently digested with an agent that cleaves in a sequence-specific manner. Such cleaving agents include restriction enzymes. Restriction enzyme digestion is preferred; enzymes that are relatively infrequent cutters (e.g., ≧5 bp recognition site) are preferred and those that leave overhanging ends are especially preferred. A restriction enzyme with a six base pair recognition site cuts approximately 8% of cDNAs, so that approximately 12 such restriction enzymes should be needed to digest every cDNA at least once. By using 30 restriction enzymes, digestion of every cDNA is assured.

The adapters for use in the present invention are designed such that the two strands are only partially complementary and only one of the nucleic acid strands that the adapter is ligated to can be amplified. Thus, the adapter is partially double-stranded (i.e., comprising two partially hybridized nucleic acid strands), wherein portions of the two strands are non-complementary to each other and portions of the two strands are complementary to each other. Conceptually, the adapter is “Y-shaped” or “bubble-shaped.” When the 5′ region is non-paired, the 3′ end of other strand cannot be extended by a polymerase to make a complementary copy. The ligated adapter can also be blocked at the 3′ end to eliminate extension during subsequent amplifications. Blocking groups include dideoxynucleotides or any other agent capable of blocking the 3′-OH. In this type of adapter (“Y-shaped”), the non-complementary portion of the upper strand of the adapters is preferably a length that can serve as a primer for amplification. As noted above, the non-complementary portion of the lower strand need only be one base, however, a longer sequence is preferable (e.g., 3 to 20 bases; 3 to 15 bases; 5 to 15 bases; or 14 to 24 bases). The complementary portion of the adapter should be long enough to form a duplex under conditions of litigation.

For “bubble-shaped” adapters, the non-complementary portion of the upper strand is preferably a length that can serve as a primer for amplification. Thus, this portion is preferably 15 to 30 bases. Alternatively, the adapter can have a structure similar to the Y-shaped adapter, but has a 3′ end that contains a moiety that a DNA polymerase cannot extend from.

Amplification primers are also used in the present invention. Two different amplification steps are performed in the preferred aspect. In the first, the 3′ end (referenced to mRNA) of double stranded cDNA that has been cleaved and ligated with an adapter is amplified. For this amplification, either a single primer or a primer pair is used. The sequence of the single primer comprises at least a portion of the 5′ sequence of the oligonucleotide primer used for first strand cDNA synthesis. The portion need only be long enough to serve as an amplification primer. The primer pair consists of a first primer whose sequence comprises at least a portion of the 5′ sequence of the oligonucleotide primer as described above; and a second primer whose sequence comprises at least a portion of the sequence of one strand of the adapter in the non-complementary portion. The primer will generally contain all the sequence of the non-complementary potion, but may contain less of the sequence, especially when the non-complementary portion is very long, or more of the sequence, especially when the non-complementary portion is very short. In some embodiments, the primer will contain sequence of the complementary portion, as long as that sequence does not appreciably hybridize to the other strand of the adapter under the amplification conditions employed, for example, in one embodiment, the primer sequence comprises four bases of the complementary region to yield a 19 base primer, and amplification cycles are performed at 56° C. (annealing temperature), 72° C. (extension temperature), and 94° C. (denaturation temperature). In another embodiment, the primer is 25 bases long and has 10 bases of sequence in the complementary portion. Amplification cycles for this primer are performed at 68° C. (annealing and extension temperature) and 94° C. (denaturation temperature). By using these longer primers, the specificity of priming is increased.

The design of the amplification primers will generally follow well-known guidelines, such as average G-C content, absence of hairpin structures, inability to form primer-dimers and the like. At times, however, it will be recognized that deviations from such guidelines may be appropriate or desirable.

After amplification, the lengths of the amplified fragments are determined. Any procedure that separate nucleic acids on the basis of size and allows detection or identification of the nucleic acids is acceptable. Such procedures include slap get electrophoresis, capillary gel electrophoresis, high performance liquid chromatography, and the like.

Electrophoresis is technique based on the mobility of DNA in an electric field. Negatively charged DNA migrates towards a positive electrode at a rate dependent on their total charge, size, and shape. Most often, DNA is electrophoresed in agarose or polyacrylamide gels. For maximal resolution, polyacrylamide is preferred and for maximal linearity, a denaturant, such as urea is present. A typical get setup uses a 19:1 mixture of acrylamide:bisacrylamide and a Tris-borate buffer. DNA samples are denatured and applied to the get, which is usually sandwiched between glass plates. A typical procedure can be found in Sambrook et al (Molecular Cloning: A Laboratory Approach, Cold Spring Harbor Press, NY, 1989) or Ausubel et al. (Current Protocols in Molecular Biology, Greene Publishing Co., NY, 1995). Variations may be substituted as long as sufficient resolution is obtained.

Capillary electrophoresis (CE) in its various manifestations (free solution, isotachophoresis, isoelectric focusing, polyacrylamide get. micellar electrokinetic “chromatography”) allows high resolution separation of very small sample volumes. Briefly, in capillary electrophoresis, a neutral coated capillary, such as a 50 μm×37 cm column (eCAP neutral, Beckman Instruments, CA), is filled with a linear polyacrylamide (e.g., 0.2% polyacrylamide), a sample is introduced by high-pressure injection followed by an injection of running buffer (e.g., 1× TBE). the sample is electrophoresed and fragments are detected. An order of magnitude increase can be achieved with the use of capillary electrophoresis. Capillaries may be used in parallel for increased throughput (Smith et al. (1990) Nuc. Acids. Res. 18:4417; Mathies and Huang (1992) Nature 359:167). Because of the small sample volume that can be loaded onto a capillary, sample may be concentrated to increase level of detection. One means of concentration is sample stacking (Chien and Burgi (1992) Anal. Cheni 64:489A). In sample stacking, a large volume of sample in a low concentration buffer is introduced to the capillary column. the capillary is then filled with a buffer of the same composition, but at higher concentration, such that when the sample ions reach the capillary buffer with a lower electric field, they stack into a concentrated zone. Sample stacking can increase detection by one to three orders of magnitude. Other methods of concentration, such as isotachophoresis, may also be used.

High-performance liquid chromatography (HPLC) is a chromatographic separation technique that separates compounds in solution. HPLC instruments consist of a reservoir of mobile phase, a pump, an injector, a separation column, and a detector. Compounds are separated by injecting an aliquot of the sample mixture onto the column. The different components in the mixture pass through the column at different rates due to differences in their partitioning behavior between the mobile liquid phase and the stationary phase. IP-RO-HPLC on non-porous PS/DVB particles with chemically bonded alkyl chains can also be used to analyze nucleic acid molecules on the basis of size (Huber et al. (1993) Anal. Biochem. 121:351; Huber et al. (1993) Nuc. Acids Res. 21:1061; Huber et al. (1993) Biotechniques 16:898).

In each of these analysis techniques, the amplified fragments are detected. A variety of labels can be used to assist in detection. Such labels include, but are not limited to, radioactive molecules (e.g., ³⁵S, ³²P, ³³P) fluorescent molecules, and mass spectrometric tags. The labels may be attached to the oligonucleotide primers or to nucleotides that are incorporated during DNA synthesis, including amplification.

Radioactive nucleotides may be obtained from commercial sources; radioactive primers may be readily generated by transfer of label from γ-³²P-ATP to a 5′-OH group by a kinase (e.g., T4 polynucleotide kinase). Detection systems include autoradiograph, phosphor image analysis and the like.

Fluorescent nucleotides may be obtained from commercial sources (e.g., ABI, Foster city, CA) or generated by chemical reaction using appropriately derivatized dyes. Oligonucleotide primers can be labeled, for example, using succinimidyl esters to conjugate to amine-modified oligonucleotides. A variety of florescent dyes may be used, including 6 carboxyfluorescein, other carboxyfluorescein derivatives, carboxyrhodamine derivatives, Texas red derivatives, and the like. Detection systems include photomultiplier tubes with appropriate wave-length filters for the dyes used. DNA sequence analysis systems, such as produced by ABI (Foster City, Calif.), may be used.

After separation of the amplified cDNA fragments, cDNA fragments which correspond to differentially expressed mRNA species are isolated, reamplified and sequenced according to standard procedures. For instance, bands corresponding the cDNA fragments can be cut from the electrophoresis gel, reamplified and subcloned into any available vector, including pCRscript using the PCR script cloning kit (Stratagene). The insert is then sequenced using standard procedures, such as cycle sequencing on an ABI sequencer.

An additional means of analysis comprises hybridization of the amplified fragments to one or more sets of oligonucleotides immobilized on a solid substrate. Historically, the solid substrate is a membrane, such as nitrocellulose or nylon. More recently, the substrate is a silicon wafer or a borosilicate slide. The substrate may be porous (Beattie et al. WO 95/11755) or solid. Oligonucleotides are synthesized in situ or synthesized prior to deposition on the substrate. Various chemistries are known for attaching oligonucleotide. Many of these attachment chemistries rely upon functionalizing oligonucleotides to contain a primary amine group. The oligonucleotides are arranged in an array form, such that the position of each oligonucleotide sequence can be determined.

The amplified fragments, which are generally labeled according to one of the methods described herein, are denatured and applied to the oligonucleotides on the substrate under appropriate salt and temperature conditions. In certain embodiments, the conditions are chosen to favor hybridization of exact complementary matches and disfavor hybridization of mismatches. Unhybridized nucleic acids are washed off and the hybridized molecules detected, generally both for position and quantity. The detection method will depend upon the label used. Radioactive labels, fluorescent labels and mass spectrometry label are among the suitable labels.

The present invention as set forth in the specific embodiments, includes methods to identify a therapeutic agent that modulates the expression of at least one gene in a granulocyte population. Genes which are differentially expressed during neutrophil contact with a pathogen, such as a virulent bacteria, or that are differentially expressed in a subject having a sterile inflammatory disease are of particular importance.

In general, the method to identify a therapeutic or prophylactic agent that modulates the response of a granulocyte population to a pathogen, comprises the steps of preparing a first gene expression profile of a quiescent granulocyte population, preparing a second gene expression profile of a granulocyte population exposed to a pathogen, treating the exposed granulocyte population with the agent, preparing a third gene expression profile of the treated granulocyte population, comparing the first, second and third gene expression profiles and identifying agents that modulate the response of a granulocytic population to the pathogen.

In another format, the method is used to identify a therapeutic agent that modulates the expression of genes in a granulocyte population found in a subject having a sterile inflammatory disease. The general method comprises the steps of preparing a first gene expression profile of a granulocyte population in a subject having a sterile inflammatory disease, treating the granulocyte population with the agent, preparing a second gene expression profile of the treated granulocyte population, comparing the first and second gene expression profile with the gene expression profile of a normal granulocyte preparation and identifying agents that modulate the expression of genes whose transcription levels are altered in the granulocyte population of the subject as compared with normal granulocyte population.

While the above methods for identifying a therapeutic agent comprise the comparison of gene expression profiles from treated and not-treated granulocytic cells, many other variations are immediately envisioned by one of ordinary skill in the art. As an example, as a variation of a method to identify a therapeutic or prophylactic agent that modulates the response of a granulocytic population to a pathogen, the second gene expression profile of a granulocyte population exposed to a pathogen and the third gene expression profile of the treated granulocyte population can each be independently normalized using the first gene expression profile prepared from a quiescent granulocyte population. Normalization of the profiles can easily be achieved by scanning autoradiographs corresponding to each profile, and subtracting the digitized values corresponding to each band on the autoradiograph from quiescent granulocytic cells from the digitized value for each corresponding band on autoradiographs corresponding to the second and third gene expression profiles. After normalization, the second and third gene expression profils can be compared directly to detect cDNA fragments which correspond to mRNA species which are differentially expressed upon exposure of the granulocyte population to the agent to be tested.

Specific Embodiments

EXAMPLE 1

Production of Gene Expression Profiles Generated from cDNAs Made with RNA Isolated from Neutrophils Exposed to Virulent and Avirulent Bacteria.

Expression profiles of RNA expression levels from neutrophils exposed to various bacteria offer a powerful means of identifying genes that are specifically regulated in response to bacterial infection. As an example, the production of expression profiles from neutrophils exposed to virulent and avirulent E. coli and Y. pestis allow the identification of neutrophil genes that are specifically regulated in response to bacterial infection.

Neutrophils were isolated from normal donor peripheral blood following the LPS-free method. Peripheral blood was isolated using a butterfly needle and a syringe containing 5 cc ACD, 5 cc of 6% Dextran (in normal saline). After 30 minutes of settling, plasma was collected and HBSS (without Ca⁺⁺ or Mg⁺⁺) was added to a total volume of 40 ml. The plasma was centrifuged (1500 rpm, for 15 m at 4° C.), the supernatant decanted and cold HBSS added to resuspend the cells. The cell suspension was then layered onto a cold Ficoll Hypaq, centrifuged at 500×g for 30 m at 4° C. The pellet contains polymorphonuclear neutrophils. Neutrophils can also be isolated by other commonly used methods such as those disclosed in Current Protocols of Immunology (John Wiley & Sons, Inc.), Babior et al. (1981) In:Leokocyte Function, Cline, M. J. Ed., p.1-38 (Church Livingstone, N.Y.), and Haslett et al. (1985) Am. J. Pathol. 119:101-110.

Following isolation, neutrophils were incubated with E. coli or Y. pestis. Before incubation, bacteria are harvested and washed in phosphate buffered saline and opsonized either autologous human serum or complement factor C7 deficient human serum (SIGMA). Incubation was at a ratio of approximately a PMN:bacteria ratio of 1:20 in RPMI 1640 (HEPES buffered) with heat inactivated Fetal Bovine Serum at 37° C. with gentle mixing in a rotary shaker bath.

As controls, neutrophils were incubated with either bacterial lipopolysaccharide (LPS) or latex beads. LPS was added to approximately 3.38×10⁸ cells in 100 ml of RPMI containing 6% autologous serum to a final concentration of 1 ng/ml to 1 μg/l. Incubation proceeded for 30 or 120 minutes with gentle rotation in disposable polycarbonate Erlenmeyer flasks at 37° C. After incubation, the cells were spun down and washed once with HBSS.

Total cellular RNA was prepared from untreated and treated neutrophils are described above using the procedure of Newburger et al. (1981) J. Biol. Chem. 266(24): 16171-7 and Newburger et al. (1988) Proc. Natl. Acad. Sci. USA 85:5215-5219. Ten micrograms of total RNA, the amount obtainable from about 3×10⁶ neutrophils, is sufficient for a complete set of cDNA expression profiles.

Synthesis of cDNA was performed as previously described by Prashar et al. in WO 97/05286 and in Prashar et al. (1996) Proc. Natl. Acad. Sci. USA 93:659-663. Briefly, cDNA was synthesized according to the protocol described in the GIBCO/BRL kit for cDNA synthesis. The reaction mixture for first-strand synthesis included 6 μg of total RNA, and 200 ng of a mixture of 1-base anchored oligo(dT) primers with all three possible anchored bases (ACGTAATACGACTCACTATAGGGCGAATTGGGTCGACTTTTTTTT TTn1 wherein n1=A/C or G) along with other components for first-strand synthesis reaction except reverse transcriptase. This mixture was incubated at 65° C. for 5 m, chilled on ice and the process repeated. Alternatively, the reaction mixture may include 10 μg of total RNA, and 2 μmol of 1 of the 2-base anchored oligo(dT) primers a heel such as RP5.0 (CTCTCAAGGATCTTACCGCTT₁₈AT), or RP6.0 (TAATACCGCGCCACATAGCAT₁₈CG), or RP9.2 (CAGGGTAGACGACGCTACGCT₁₈GA) along with other components for first-strand synthesis reaction except reverse transcriptase. This mixture was then layered with mineral oil and incubated at 65° C. for 7 min followed by 50° C. for another 7 min. At this stage, 2 μl of Superscript reverse transcriptase (200 units/μl; GIBCO/BRL) was added quickly and mixed, and the reaction continued for 1 hr at 45-50° C. Second-strand synthesis was performed at 16° C. for 2 hr. At the end of the reaction, the cDNAs were precipitated with ethanol and the yield of cDNA was calculated. In our experiments, ≈200 ng of cDNA was obtained from 10 μg of total RNA.

The adapter oligonucleotide sequences were A1 (TAGCGTCCGGCGCAGCGACGGCCAG) and A2 (GATCCTGGCCGTCGGCTGTCTGTCGGCGC). One microgram of oligonucleotide A2 was first phosphorylated at the 5′ end using T4 polynucleotide kinase (PNK). After phosphorylation, PNK was heated denatured, and lug of the oligonucleotide A1 was added along with 10× annealing buffer (1 M NaCl/100 mM Tris-HCl, pH8.0/10 mM EDTA, pH8.0) in a final vol of 20 μl. This mixture was then heated at 65° C. for 10 min followed by slow cooling to room temperature for 30 min. resulting in formation of the Y adapter at a final concentration of 100 ng/μl. About 20 ng of the cDNA was digested with 4 units of Bgl II in a final vol of 10 μl for 30 min at 37° C. Two microliters (≈4 ng of digested cDNA) of this reaction mixture was then used for ligation to 100 ng (≈50-fold) of the Y-shaped adapter in a final vol of 5 μl for 16 hr at 15° C. After ligation, the reaction mixture was diluted with water to a final vol of 80 μl (adapter ligated cDNA concentration, =50 μg/μl) and heated at 65° C. for 10 min to denature T4 DNA ligase, and 2-μl aliquots (with ≈100 pg of cDNA) were used for PCR.

The following sets of primers were used for PCR amplification of the adapter ligated 3′-end cDNAs:

TGAAGCCGAGACGTCGGTCG(T)₁₈ n1, n2 (wherein n1, n2=AA, AC, AG AT CA CC CG CT GA GC GG and GT) as the 3′ primer with A1 as the 5′ primer or alternatively RP 5.0, RP 6.0, or RP 9.2 used as 3′ primers with primer A1.1 serving as the 5′ primer. To detect the PCR products on the display gel, 24 pmol of oligonucleotide A1 or A1.1 was 5′-end-labeled using 15 μl of [γ-³²P]ATP (Amersham; 3000 Ci/mmol) and PNK in a final volume of 20 μl for 30 min at 37° C. After heat denaturing PNK at 65° C. for 20 min, the labeled oligonucleotide was diluted to a final concentration of 2 μM in 80 μl with unlabeled oligonucleotide A1.1. The PCR mixture (20 μl) consisted of 2 μl (≈100 pg) of the template, 2 μl of 10×PCR buffer (100 mM Tris HCl, pH 8.3/500 mM KCl), 2 μl of 15 mM MgCl₂ to yield 1.5 mM final Mg²⁺ concentration optimum in the reaction mixture, 200 μM dNTPs, 200 nM each 5′ and 3′ PCR primers, and 1 unit of Amplitaq Gold. Primers and dNTPs were added after preheating the reaction mixture containing the rest of the components at 85° C. This “hot start” PCR was done to avoid artefactual amplification arising out of arbitrary annealing of PCR primers at lower temperature during transition from room temperature to 94° C. in the first PCR cycle. PCR consisted of 5 cycles of 94° C. for 30 sec, 55° C. for 2 min, and 72° C. for 60 sec followed by 25 cycles of 94° C. for 30 sec, 60° C. for 2 min, and 72° C. for 60 sec. A higher number of cycles resulted in smeary gel patterns. PCR products (2.5 μl) were analyzed on 6% polyacrylamide sequencing gel. For double or multiple digestion following adapter ligation, 13.2 μl of the ligated cDNA sample was digested with a secondary restriction enzyme(s) in a final vol of 20 μl. From this solution, 3 μl was used as template for PCR. This template vol of 3 μl carried ≈100 pg of the cDNA and 10 mM MgCl₂ (from the 10× enzyme buffer), which diluted to the optimum of 1.5 mM in the final PCR vol of 20 μl. Since Mg²⁺ comes from the restriction enzyme buffer, it was not included in the reaction mixture when amplifying secondarily cut cDNA. Bands were extracted from the display gels as described by Liang et al. (1995 Curr. Opin. Immunol. 7:274-280), reamplified using the 5′ and 3′ primers, and subcloned into pCR-Script with high efficiency using the PCR-Script cloning kit from Stratagene. Plasmids were sequenced by cycle sequencing on an ABI automated sequencer.

FIG. 1 presents an autoradiogram of the expression profile generated from cDNAs made from RNA isolated from control (untreated) neutrophils (lanes 1, 5, 10, 13, 14 and 16), neutrophils incubated with avirulent E. coli K12 (lanes 2 and 11), virulent Y. pestis (lane 3), avirulent Y. pestis (lane 4), Y. pestis yopB (lane 6), Y. pestis yopE (lane 7), Y. pestis yopH (lane 8), latex beads (lanes 9 and 19), virulent Entero Hemorrhagic E. coli (EHEC) (lane 12), LPS (lane 15), 1 ng/ml LPS for 30 minutes (lane 17), and LPS for 120 minutes (lane 18). The anchoring oligo d(T)18 n1, n2 has A and C at the n1 and n2 positions, respectively. The cDNAs were digested with BglII.

EXAMPLE 2

Production of Gene Expression Profiles Generated from cDNAs Made with RNA Isolated from Neutrophils Exposed to Virulent and Avirulent Bacteria and Neutrophils Exposed to Cytokines.

Neutrophils were isolated from normal donor peripheral blood following the LPS-free method as set forth in Example 1.

Neutrophils were incubated with virulent and avirulent E. coli or Y. pestis, LPS at 1 ng/ml, GM-CSF at 100 units/ml, TNFα at 1000 units/ml, or γIFN at 100 units/ml. The bacterial cells, LPS or cytokines were added to approximately 3.38×10⁸ cells in 100 ml of RPMI containing 6% H1 autologous serum. Incubation proceeded for 2 to 4 hours, preferably 2 hours, with gentle rotation in disposable polycarbonate Erlenmeyer flasks at 37° C. After incubation, the cells were spun down and washed once with HBSS.

After incubation of the neutrophils, RNA was extracted and the cDNA profiles prepared as described in Example 1. FIG. 2 is an autoradiogram of the expression profiles generated from cDNAs made with RNA isolated from control (untreated) neutrophils (lanes 1, 5, 10 and 14), neutrophils incubated with avirulent E. coli K12 (lanes 2 and 11), virulent Y pestis (lanes 3 and 12), avirulent Y. pestis (lanes 4 and 13), 1 ng/ml LPS (lanes 6 and 15), 100 units/ml GM-CSF (lanes 7 and 16), 1000 units/ml TNFα (lanes 8 and 17) and 100 units/ml γIFN (lanes 9 and 18). The anchoring oligo d(T)18n1, n2 has A and C at the n1 and n2 positions for lanes 1-9 and G and G at the n1 and n2 for lanes 10-18. The cDNAs were digested with BglII.

As exhibited by FIG. 2, the differential expression of mRNA species (as exhibited by cDNA fragments) in neutrophils exposed to virulent and avirulent E. coli and Y. pestis is not equivalent to the differential expression of mRNA species in neutrophils exposed to the various cytokines.

EXAMPLE 3

Production of Gene Expression Profiles Generated from cDNAs Made with RNA Isolated from Neutrophils Exposed to Bacteria Using all 12 Possible Anchoring Oligo d(T) n1,n2.

Neutrophils were isolated from normal donor peripheral blood following the LPS-free method.

Neutrophils were incubated with E. coli or Y. pestis.

After incubation of the neutrophils, RNA was extracted and the cDNA profiles prepared as described in Example 1. FIG. 3 is an autoradiogram of the expression profiles generated from cDNAs made with RNA isolated from control (untreated) neutrophils (lane 1), neutrophils incubated with avirulent E. coli K12 (lane 2), virulent Y. pestis (lane 3), avirulent Y. pestis (lane 4). The anchoring oligo d(T)18 n1 and n2 positions are indicated at the top of the figure. The cDNAs were digested with BglII.

FIG. 4 represents a summary of genes which are differentially expressed in neutrophils upon exposure to virulent and avirulent E. coli and Y. pestis. Expression patterns are determined by visual examination of the autoradiography gels comparing band intensity between neutrophils exposed to the various bacteria. The autoradiography gels can also be scanned using commonly available equipment, such s a UMAX D-1L scanner. Bands which exhibit altered intensities in gene expression profiles from neutrophils exposed to the various bacteria when compared to the gene expression profile prepared from normal nonexposed neutrophils are then extracted from the display gel as previously described by in Example 1. The isolated fragments are then reamplified using 5′ and 3′ primers, subcloned into pCR-Script (Stratagene) and sequenced using an ABI automated sequencer.

Tables 1 and 2 represent a summary of cDNA bands which are differentially expressed in response to exposure to E. coli.

	mRNA								Closest
	Expression							Sequenced	Genbank	Closest
Clones	Pattern	Control	10′	30′	60′	120′	n1n2	by	Acc. #	Homology
846	Up	0	0	+−	2+	4+	AA	Yale	K02286	Urokinase
										Gene
847	Up	+−	+−	+−	+	2-3+	AA	Yale
848	Up	+−	+−	0	+−	2+	AA	Yale
849	Up	+−	+−	+−	+− +	1-2+	AA	Yale
850	Down	+	0	0	0	0	AA	Yale
851	Up	0	0	0	0	+	AA	Yale
852	Down	+	+	+−	+	0	AA	Yale
853	Up	0	0	+−	+−	1-2+	AA	Yale
854	Down	2+	+	+−	0	0 +−	AA	Yale	AF039715	C. elegans
										cosmidR0
										6A10
T103	Up	3+	3+	3-4+	4-5+	4-5+	AA	Yale	M77693	HUMAN
										SSAT
855	Up	+−	+−	+−	+−	2+	AA	Yale	G29248	Human
										STS
										SHGC
										17036
856	Up	+−	+−	+−	+−	2+	AA	Yale	AI038932	ox96h08.xl
										soares
										senescent
										Fibroblasts
T104	Up	+	+	+−	+	2+	AA	Yale	AA931109	HUMAN
										CGAP
										KID3
T105		3-4+	3-4+	3-4+	3+	3+	AA	Yale	M11354	HUMAN
										H3.3
										HISTONE
857		+	+	2+	+	+−	AA	Yale
T107	Down	2-3+	2-3+	2-3+	2-3+	2+	AA	Yale	AA936257	on43e12
										Sinel
										CGAP co8
858	Down	2+	2+	2+	2+	+ +−	AA	Yale
859	Up	+−	+−	+−	2+	1-2+	AA	Yale	AC004987	DJ1173120
										Clone
860	Down	2-3+	2-3+	2+	2+	+−	AA	Yale
861	Down	+	+	1-2+	+−	+−	AA	Yale
862		2-3+	2-3+	2-3+	2-3+	2-3+	AA	Yale
863	Down	2+	+	+−	+	+	AA	Yale	H26311	Cystic
										Fibrosis
										Antigen
864	Up	2+	2+	2+	2-3+	2-3+	AA	Yale
865	Up	+	+	2+	2-3+	2+	AA	Yale
866	Up	+−	+−	+	+	2+	AA	Yale	G06511	Human
										STS WI-
										7311
867	Down	2+	2+	2+	2+	1-2+	AA	Yale
868		+−	+−	+	2+	+−	AA	Yale
869	Up	+	+−	+−	+−	2+	AC	Yale
870	Up	0	0	0	+−	1-2+	AC	Yale
871	Down	1-2+	1-2+	1-2+	+	+−	AC	Yale	AI026899	ov42do7.xl
										Soares
										testis nht
872		+	+	+−	+	+	AC	Yale	AA916304	on22do4.si
										NCI
										CGAP Lu5
873	Up	+−_+	+−_+	+−_+	+−_+	2+	AC	Yale
874	Up	1-2+	1-2+	1-2+	+	3+	AC	Yale	AI012139	EST
										206590
										(Rat
										Placenta)
875	Up	1-2+	1-2+	+	+	2-3+	AC	Yale
876	Down	+	1-2+	2+	+	+−_0	AC	Yale	AI031728	ow39a05.
										xl Soares
										parathyroid
										tumor
										NGHPA
877	Down	2-3+	2+	2+	+	+−	AC	Yale
878	Down	2-3+	2-3+	2+	1-2+	0_+−	AC	Yale	AB002384	human
										mRNA for
										KIAA0386
										gene
879		+	+−	0	0	+	AC	Yale
880	Down	1-2+	+−	+−	+−	0	AC	Yale	AI016473	Transciption
										Factor
										BTF3
881	Down	+	+	1-2+	+	+−	AC	Yale	U82275	Human
										immunoglobulin-
										like
										transcipt
882	Up	2+	2+	3+	3-4+	4+	AC	Yale	AI016664	Diamineacetyl
										Transferase
883	Down	1-2+	+	+	+	+−	AC	Yale	AA909168	SI Soares
										NFLT
										GBC.SI
884	Down	+	+−	0	0	0	AC	Yale	AI039973	ox88e09.si
										Soares
										senescent
										fibroblasts
885	Up	2+	1-2+	1-2+	2+	2-3+	AC	Yale	AI026998	ow41d06.
										si Soares
										parathyroid
										tumor
										NB4PA
886		0	+−	+−_+	+−	0	AC	Yale
887	Up	+−	0	0	+−	+	AC	Yale
888	Up	0	0	0	+−	+	AC	Yale
T7	Down	2+	1-2+	1-2+	+	+−	AC	Yale
889	Up	+−	0	+−	+−	1-2+	AC	Yale
T8	Down	2-3+	2+	2+	2+	1-2+	AC	Yale	G06680	HUMAN
										STS
890	Up	2+	2+	1-2+	+	+−	AC	Yale
891	Down	+	+	+−	0	0	AC	Yale
T76	Down	2-3+	2+	2+	1-2+	+−	AC	Yale	S73591	HUMAN H
										HCPA78
										HOMOLOG
892	Down	3+	3+	3+	2+	+−	AC	Yale
893		2+	+	1-2+	2+	2+	AC	Yale
T98	Down	2-3+	2-3+	2-3+	2-3+	+_+−	AC	Yale	G06788	HUMAN
										STS
894	Down	2+	1-2+	1-2+	1-2+	+	AC	Yale	AF039656	Neuronal
										tissue-
										enrichedacidic
										protein
895	Down	2-3+	2-3+	2-3+	2+	+−	AC	Yale	AI016303	ot72d07.si
										soares
										total Fetus
										Nb3hf8
896	Down	2+	2+	1-2+	+−	0	AC	Yale	AC004987	DJ
										1173I2O
										clone
T81	Up	0	0	0	0	3+	AC	Yale	AA926999	om26do7
										si Soares
										NFLTG3c
										1s1
T82	Up	+	+	+	+−	2-3+	AC	Yale	AA926999	om26do7.
										SI NFL
										TG3cSi
T83	Down	2+	2+	1-2+	1-2+	1-2+	AC	Yale
T84		2-3+	2+	2-3+	3+	2-3+	AC	Yale
T85	Down	+	+−	+−_0	+−_0	0	AC	Yale	O89052	HUMAN
										PROTONATPASE
897	Down	2+	1-2+	1-2+	+	+_+−	AC	Yale
898		2+	2+	2+	2+	2+	AC	Yale
899	Up	0	0	+−	+	3+	AC	Yale
900	Down	1-2+	1-2+	+−	1-2+	0	AC	Yale
901	Up	1-2+	+	1-2+	2+	2-3+	AC	Yale
902	Down	2+	+	1-2+	1-2+	+	AC	Yale
903	Down	2+	2+	3+	3-4+	+−	AC	Yale
904		+	+	+−	+−	+	AC	Yale
905	Up	0	+−	0	+	3-4+	AG	Yale	KO2286	Human
										urokinase
										gene 3′
										end
906	Up	0	0	+−	+−	1-2+	AG	Yale
T111		+−_+	2+	+−	+−	+−	AG	Yale
907		+−	+	+	2+	+−	AG	Yale
908	Down	2+	2+	1-2+	2+	+−	AG	Yale
909		+−	+−	+	2+	+−_0	AG	Yale
910	Down	+	1-2+	0	+−	+−	AG	Yale	AC002091	Genomic
										Sequence
										Human
										17,
										complete
										sequence
911	Down	2+	2+	2+	+	−	AG	Yale
T113	Down	2+	2-3+	2+	2+	1-2+	AG	Yale	AI039523	ox371002.
										si Soares
										total fetus
										NB22HF8
912	Down	+−	+−	+−	−	−	AG	Yale
913	Down	3+	3+	2-3+	2-3+	2+	AG	Yale
914	Up	−	+−	−	−	+	AG	Yale
915	Up	+	1-2+	+	1-2+	2+	AG	Yale	AI038932	ox96ho8.
										xi Soares
										senescent
										fibroblasts
T115		2+	2+	2+	2+	2+	AG	Yale
916	Up	+	+	+	+	2+	AG	Yale	AC005038	Homo sapiens
										clone
										NH
										048666122
										HTGS
										phase 1
917	Down	+−	+−	−	−	−	AG	Yale
918	Down	+	+	+	+	+−	AG	Yale
919		+	+	−	+	+	AG	Yale
920	Down	+	2+	+	+−	+−	AG	Yale
T116	Down	3-4+	3-4+	3+	3+	3+	AG	Yale	M11353 H	Histone
										H3.3
										(human)
T117	Up	+	+	+	2+	2+	AG	Yale
921	Up	1-2+	2+	+	1-2+	2-3+	AG	Yale	AA912471	NCI
										CGAP
										GC4
										Homo
										Sapiens
922	Down	1-2+	2+	+	1-2+	0-+-?	AG	Yale
923	Down	+−	+−	−	+−	−	AG	Yale
924	Up	0	0	0	+−	2+	AG	Yale
925	Down	+−	+	0	0	0	AG	Yale
926	Down	1-2+	1-2+	+	+−_+	2+	AG	Yale
927	Up	+	?+	?+	2+	2+	AG	Yale	AA917380	0180a04.si
										NCI
										CGAP
										KIDS
928	Up	0	0	0	0	2+	AG	Yale	AA926999	Homo
										Soares
										NFL
										TGBC si
929	Down	+	−	+	+	−	AG	Yale
930	Up	0	0	0	+−	2+	AG	Yale	CH29R28	AD000864
									051	Homo Sapiens
										DNA
										from
										chromosome
										19
										cosmid
										R28051
931	Down	2+	2+	1-2+	1-2+	+	AG	Yale
932	Up	+	+	+	+	2+	AG	Yale
933	Down	4+	4+	3+	3+	3+	AG	Yale	m81637	Human
										grancalan
										mRNA
934		−	−	+−	+	+−	AG	Yale
935	Down	+−	+	+	+	−	AG	Yale
936		+	+−	+−	+	+	AG	Yale
937	Up	+−	+−	+−	+−	+	AG	Yale
938	Up	+−	+−	+−	+	2+	AT	Yale
939	Up	0	0	+−	+−	2+	AT	Yale	AA916304	NCI
										CGAP
										LU5
										HOMO
										SAPIENS
940		+	+	2+	2-3+	+	AT	Yale
941	Up	+	+	+	+	2-3+	AT	Yale
942	Up	+	+	+−	0	1-2+	AT	Yale
943	Down	+−	+−	+−	+	−	AT	Yale
944	Down	2+	+	+	+−	0	AT	Yale
945	Up	+	+−_+	+−_+	+−_+	2+	AT	Yale	AA928171	ON86HO3
										SOARES
										NFL
										TGBC SI
946	Down	+	+	+	−	−	AT	Yale
947		0	0	+	2+	0	AT	Yale
948	Down	+	+	+	+−	−	AT	Yale
949	Up	0	0	0	0	1-2+	AT	Yale	AI038932	HOMO
										SAPIENS
										SOARES
										SENESCENT
										FIBROBLASTS
950	Down	2-3+	2-3+	2-3+	2-3+	+?	AT	Yale
951	Up	+−	+−	+−	+−	+	AT	Yale
952	Up	0	0	0	+−	1-2+	AT	Yale	ACC004551	HOMO
										SAPIENS
										HTGS
										PHASE 1
953	Down	1-2+	+	1-2+	+−	0	AT	Yale
954	Up	+	+	+	1-2+	2-3+	AT	Yale	AI026998	HOMO
										SPAIENS
										SOARES
										PARATHYROID
										TUMOR
955	Down	+	+	+	+	0	AT	Yale
956	Up	+−	+−	+−	+−	+	AT	Yale
957	Down	2+	2+	2+	2+	+	AT	Yale
958	Up	+	+	+	+−_+	2+	AT	Yale
T123	Up	+−	+−	+	2+	3+	AT	Yale	HSO27467	HUMAN
										BCL-2
										RELATED
										(BF1-1)
										MRNA
959		+	+_+−	2+	+	+	AT	Yale
960	Down	2+	+	+	+	+−	AT	Yale
961		0	+−	2+	+−_0	+−_0	AT	Yale
962	Up	0	0	0	0	2+	AT	Yale
T124	Up	3+	3+	3+	3-4+	3-4+	AT	Yale
963	Down	2+	2+	2+	2+	+	AT	GLI
964		+−	1-2+	+	+	+−	AT	GLI
965	Up	0	0	+−	2+	1-2+	AT	GLI
966	Down	+	+	+	1-2+	+−	AT	GLI
967	Down	3+	3+	3+	3+	+−	AT	GLI	M60830	Human
										gene
										EVI2B#P
968	Down	+	+	2+	1-2+	+−	AT	GLI
969	Up	0	0	0	+−	2+	AT	GLI
970		0	0	0	2+	0	AT	GLI
971	Down	+	+	2+	1-2+	+−	AT	GLI
972	Down	+	+	+	+	−	AT	GLI
973	Up	−	−	−	−	+	AT	GLI
974	Up	+	+	2+	3+	2+	CA	Yale
975		+	+−	1-2+	2+	?	CA	Yale	GBM77693	HUMAN
										DIAMINE
										ACETYLTRANSFERASE
976		1-2+	1-2+	2-3+	3+	?	CA	Yale	Z14136	HOMO
										SAPIENS
										GENE
										SPERMIDINE/
										SPERMINE
										N1-
										ACETYLTRANSFERASE
T132							CA
T133							CA
977	Up	+	+	1-2+	2-3+	1-2+	CA	Yale
T135							CA
978	Down	2+	2+	2+	2+	−	CA	GLI	G05563	Human
										STS WI-
										7246
979	Down	+	+	+	+	−	CA	GLI
980		−	−	−	+	−	CA	GLI
981	Down	+	+	+	+	−	CA	GLI	473168	Human
										cosmid
										LUCA22
982		−	−	−	+	−	CA	GLI	M55542	Human
										granulyte
										binding
										M55542
										protein
										Isoform I
983		−	−	−	+	−	CA	GLI
984		2+	2+	3+	3-4+	2+	CC	Yale	HS167A14	Z94721
										HUMAN
										DNA SEQ-
										PAC167A14
										CHROM6927
T139	Up	+	+−	+	−	2+	CC	GLI
985	Down	+	+	+	2+	+−	CC	Yale
T140	Up	+	+	+	+	2+	CC	GLI
986	Down	2+	2+	1-2+	1-2+	+−	CC	Yale	AI015836	0V51H11.
										SI
										SOARES
										TESTIS
										NHT
										HOMO
										SAPIENS
987		2-3+	2+	2+	3-4+	3+	CC	Yale

TABLE 2
Cln	Sequence+HZ,1/32
846	1	TCTCAGTGAG GTGAGATCAC ACCACTGCAC TCCAACTGGG
		CGACAGAGCA
	51	AG
854	1	CACTTTCCCC AAATTCTTTT GCCATAGTTC ACTCTCTACT
		GATAAGGCCA
	51	C
855	1	GGGAAAGTGG TGGGGTGGTG AGGGTCAATG TGCAGAAAAT
		CGATGTAACT
	51	TGTAATACAG TTGAGTCAAC TGTGTGTTCA CAACAACTCT
		GAGAGTTAAC
	101	ACCATTTCTA C
856	1	ATCTAAATAT TTTTCATACC GAGTTATTAA GGAGTCAGTA
		GTCTGTGCTA
	51	CAATGCTGCA AAAAGCATCA CGTGGAAGAA TGGGAACTAT
		GCGTACTTTA
	101	TGAAGTGATG TATAACACAA TGAACTCTGT TTTACAACTA
		CAGTGCTGCA
	151	TTCAATTATC TTCCAT
859	1	AAGCTCTGTA TACAAAAGTT ATTTATTTAG ATGTTCGAGG
		CATGTCTCTC
	51	CTCACCTGTA AACTAACTGT TTTATAACAG CTTGTATCAC
		ATGTGTGAAG
	101	TTAATGAATG TAATACTCCA ACAAGCCATT CATCAGATTG
		GCCAACAGCT
	151	AGGATACAGT TAAATAATGG CGACCAGGTT GACAAGTCAT
		AATTGCGGTT
	201	TGGGGGACCG TAGTTGCACC TCACCTAGAC CAACGTACGC
		ATGGCACTCG
	251	ACCCAGGCGA ACAAAATTAA T
863	1	TTTCTCAAGA AGAGATAAGA ATGAAAAGTC ATAGAACACA
		TCATGGAGGA
	51	CCTGGACACA AATGCAGACA AGCAGCTGAG CTTCGAGGAG
		TTCATCATGC
	101	TGATGGCGAG GCTAACCTGG GCCTCCCACG AGAAGATGCA
		CGAGGGTGAC
	151	GATGGCCCTG GCCACCACCA TAAGCCAGGC CTCGGGGAGG
		GCACCCCCTA
	201	AGACCACAGT GGACAAGATC ACAGTGGCCA CGGACACGGC
		CACAGTCATG
	251	GTGGCCACGG CCACAGCCAC TAATCAGGAG GCCAGGCCAC
		CCTGCCTCTA
	301	CCCAACCAGG GCCCCGGGGC CTGTTATGTC AAACTGTCTT
		GGCTGTGGGG
866	1	NGATCTTTCT AGGAGGGAGA CACTGGCCNC TCAAATCGTC
		CAGCGACCTT
	51	CCTCATCCAC CCCATCCCTC CCCAGTTCAT TGCACTTTGA
		TTAGCAGCGG
	101	AACAAGGAGT CAGACATTTT AAGATGGTGG CAGTAGAGGC
		TATGGACAGG
	151	GCATGCCACG TGGGCTCATA TGGGGCTGGG AGTAGTTGTC
		TTTCCTGGCA
	201	CTAACGTTGA GCCCCTGGAG GCACTGAAGT GCTTAGTGTA
		CTTGGAGTAT
	251	TGGGGTCTGA CCCCAAACAC CTTCCAGCTC CTGTAACATA
		CTGGCCTGGA
	301	CTGTTTTCTC TCGGCTCCCC ATGTGTCCTG GTTCCCGTTT
		CTCCACCTAG
	351	ACTGTGAACC TCTCGAGGGC AGGGACCACA CCCTGTACTG
		TTCTGTGTCT
	401	TTCACAGCTC CTCCCACAAT GCTGAATATA CAGCAGGTGC
		TCAATAAATG
	451	ATTCT
871	1	GCAAGTGTGT TGTGTTACAG TGTCACAACA CCGAG
872	1	GATCTCTCCC TACGCAAAAC GTATTGTAGT GAAAGGGTCT
		TCTTTACTAC
	51	CTTAATAAAA CAGCTAGTGT G
874	1	GATCTAAATA CAAAGGATAT ACAGTCTTGA ATCTAAAATA
		ATTTGCTAAC
	51	TATTTTGATT CTTCAGAGAG AACTACTA
876	1	GATCTAGTCC GGACATGCTG TGTATATTGT AACGTTAAAT
		GAAAAAAGAA
	51	CCCCCCTTTG TATTATAGTC ATGCGGTCTT ATGTATGATA
		AACAGTTG
878	1	GATCTTTTGT AGTCACCTCT GTATCTTATG TCTGGTTGAG
		GGGTGCTTTT
	51	ACTTGTCTGG CATTTGCATT CAATGATCTT TCAGTCATGT
		CAGTTAGACT
	101	AAAAATTATT TCTG
880	1	CCCAAGCCCC TTGGACACTG CAGCTCTTTT CAGTTTTTGC
		TTACACACAA
	51	TTCATTCTTT GCAGCTAATT AAGCCGAAGA AGCGTGGGAA
		TCAAGTTTGG
	101	AACAGAGATT AAAAAAGTTC TT
881	1	GCTCTGGAGG ACAATCCAGG AACTACATTA CCTGGACTGT
		ATGCTGGTCA
	51	TTTCTACAGA CAGCATTCAG TATTTGAGTG TACGGTAACT
		GTCTGGGGTG
	101	ATTCCTATAA GATCATTATA CTG
882	1	GATCTTTCTC CTTGAATATC TTTCGATAAA CAACAAGGTG
		GTGTGATCTT
	51	AATATATTTG AAAAAAACTT CATTCTCGTG AGTCATTTAA
		ATGTGTACAA
	101	TGTACACACT GGTACTTAGA GTTTCTGTTT GATTCTTTTT
		TAATAAACTA
	151	C
883	1	TGTCACTCAT GCCCTGGGAC TGCTTCTCCA GCCAGGCGGG
		CGCCATACGT
	51	CCCACACTAG TGAAGGTCAA TGTCTCAGAA CAACACCTCT
		AT
884	1	GATCTGGCCT GTTCCTGCGT CTGCGGAGCA GGCCTTGTCT
		CCCAGCTATC
	51	TATAACCTTA CCTAGAGTGT CGACTTGTGG GTTCCTGTTG
		CTGAGACTTC
	101	CTGGATGGAG CCGCCCTCAC CGCCGGACCC GTAGCACTGC
		GCGGAACTGT
	151	GTCCAATAAA GT
885	1	GATCTGATTT GCTAGTTCTT CCTTGTAGAG TTATAAATGG
		AAAGATTACA
	51	CTATCTGATT AATAGTTTCT TCATACTCTG CATATAATTT
		GTGGCTGCAG
	101	AATATTGTAA TTTGTTGCAC ACTATGTAAC AAAACAACTG
		AAGATATGTT
	151	TAATAAATAT TGTACT
894	1	GATCTTTATG AGAGCAGTAT TTTCTGTGTT TTCTTTTTAA
		TTTACAGCCT
	51	TTCTTATTTT GATATTTTTT TAATGTTGTG GATGAATGCC
		AGCTTTCAGA
	101	CAGAGCCCAC TTAGCTTGTC CACATGGATC TCAATGCCAA
		TCCTCCATTC
	151	TTCCTCTCCA GATATTTTTG GGAGTGACAA ACATTCTCTC
		ATCCTACTTA
	201	GCCTACCTAG ATTTCTCATG ACGAGTTAAT GCATGTCCGT
		GGTTGGGTGC
	251	ACCTGTAGTT CTGTTTATTG GTCA
895	1	GATCTAAGTT AGTCCAAAAG CTAAATGATT TAAAGTCAAG
		TTGTAATGCT
	51	AGGCATAAGC ACTCTATAAT ACATTAAATT ATAGGCCGAG
		CAATTAGGGA
	101	ATGTTTCTGA AACATTAAAC TTGTATTTAT GTCACTAAAA
		TTCTAACACA
	151	AACTTAAAAA ATGTGTCTCA TACATATGCT GTACTAGGCT
		TCATCATGCA
	201	TTTCTAAATT TGTGTATGAT TTGAATATAT GAAAGAATTT
		ATACACGAGT
	251	GTTATTTAAA ATTATTAAAA ATAAATGTA
896	1	GATCTTATAG GCCTGTCTCA TCAGGTTGGT GTCAGCCCAG
		CTAGGATTAG
	51	GCAGAATTGG GTGGGGGCTG TAGTGCACTT TTGGCACAGC
		ATGTACCTGT
	101	CTGACTAATT CTCTGTCTTT TCTTTCCTGT TGCAATTCAT
		GGGTCTTAGC
	151	ATCTTCTGAA TGGTGTTTAG TAGGTCATCC TGTTGATTTC
		CTGCTAGGGA
	201	GTAGCATACT CTGGCTCTGT ACCACTGGCC AAGGGACTTA
		AGGATAGATG
	251	AAGGGCTGCA GTTTTGTTAA ATGGAACAAT ATGAAGAGA
T10	1	GATCTTTCTC CTTGAGTATC TTTCGATAAA CAACAAAGTG
3		GTGTGATCTT
	51	AATATATTTG AAAAAAACTT CATTCTCGTG AGTCATTTAA
		ATGTGTACAA
	101	TGTACACACT GGTACTTAGA GTTTCTGTTT GATTCTTTTT
		TAATAAACTA
	151	C
T10	1	GATCTCTGCT CATAGAATGC ATGGGGAGCC TTCCAGCTCA
4		CTCTCCCTGA
	51	GGACTGGCTT GACAGGGGCT ATGGGTTTGC TTTGG
T10	1	GATCTGCGCT TCCAGAGCGC AGCTATCGGT GCTTTGCAGG
5		AGGCAAGTGA
	51	GGCCTATCTG GTTGGCCTTT TTGAAGACAC CAACCTGTGT
		GCTATCCATG
	101	CCAAACGTGT AACAATTATG CCAAAAGACA TCCAGCTAGC
		ACGCCGCATA
	151	CGTGGAGAAC GTGCTTAAGA ATCCACTATG ATGGGAAACA
T10	1	GATCTAAATG TGAACAGTTT ACTAATGCAC TACTGAAGTT
7		TAAATCTGTG
	51	GCACAATCAA TGTAAGCATG GGGTTTGTTT CTCTAAATTG
		ATTTGTAATC
	101	TGAAATTACT GAACAACTCC TATTCCCATT TTTGCTAAAC
		TCAATTTCTG
	151	GTTTTGGTAT ATATCCATTC CAGCTTAATG CCTCTAATTT
		TAATGCCAAC
	201	AAAATTGGTT GTAATCAAAT TTTAAAATAA TAATAATTTG
		GC
T76	1	GCCTTTTCGA TAGTTTCGGG TCAGGTAAAA ATGGCCTCCT
		GGCGTAAGCT
	51	TTTCAAGGTT TTTTGGAGGC TTTTTGTAAA TTGTGATAGG
		AACTTTGGAC
	101	CTTGAACTTA CGTATCATGT GGAGAAGAGC CAATTTAACA
		AACTAGGAAG
	151	ATGAAAAGGG AAATTGTGGC CAAAACTTTG GGAAAAGGAG
		GTTCTTAAAA
	201	TCAGTGTTTC CCCTTT
T8	1	GATCTATGCA CAAGAACCCC TTTACCCCAT GACCAACATC
		GCAGACACAT
	51	GTGCTGGCCA CCTGCTGAGC CCCAAGTGGA ACGAGACAAG
		CAGCCCTTAG
	101	CCCTTCCCCT CTGCAGCTTC CAGGCTGGCG TGCAGCATCA
		GCATCCCTAG
	151	AAAGCCATGT GCAGCCACCA GTCCATTGGG CAGGCAGATG
		TTCCTAATAA
	201	AGCT
T81	1	GATCTTTCCT CCTGGTTACT GTGAAGCCTG TTGGTTTGCT
		GCTGTCGTTT
	51	TTGAGGAGGG CCCATGGGGG TAGGAGCAGT TGAACCTGGG
		AACAAACCTC
	101	ACTTGAGCTG TGCCTAGACA ATGTGAATTC CTGTGTTGCT
		AACAGAAGTG
	151	GCCTGTAAGC TCCTGTGCTC CGGAGGGAAG CATTTCCTGG
		TAGGCTTTGA
	201	TTTTTCTGTG TGTTAAAGAA ATTCAATCTA CTCATGATGT
		GTTATGCATA
	251	AAACATTTCT GGAACATGGA TTTGTGTTCA CCTTAAATGT
		GAAAATAAAT
	301	CCTA
T82	1	ATCTTTCCTC CTGGTTACTG TGAAGCCTGT TGGTTTGCTG
		CTGTCGTTTT
	51	TGAGGAGGGC CCATGGGGGT AGGAGCAGTT GAACCTGGGA
		ACAAACCTCA
	101	CTTGAGCTGT GCCTAGACAA TGTGAATTCC TGTGTTGCTA
		ACAGAAGTGG
	151	CCTGTAAGCT CCTGTGCTCC GGAGGGAAGC ATTTCCTGGT
		AGGCTTTGAT
	201	TTTTCTGTGT GTTAAAGAAA TTCAATCTAC TCATGATGTG
		TTATGCATAA
	251	AACATTTCTG GAACATGGAT TTGTGTTCAC CTTAAATGTG
		AAAATAAATC
	301	CTATTTTCTA TG
T85	1	GATCTTTGGC AGCGCCATTG GACTCTTTGG GGTCATCGTC
		GCAATTCTTC
	51	ATACCTCCAG AGTGAAGATG GGTGACTAGA TGATATGTGT
		GGGTGGGGCC
	101	GTGCCTCACT TTTATTTATT GCTGGTTTTC CTGGGACAGC
		TGGAGCTGTG
	151	TCCCTTAACC TTTCAGAGGC TTGGTGTTCA GGGCCCTCCC
		TGCACTCCCC
	201	TCTTGCTGCG TGTTGATTTG GAGGCACTGC AGTCCAGGCC
		GAGTCCTCAG
	251	TGCGGGGAGC AGGCTGCTGC TGCTGACTCT GTGCAGCTGC
		GCACCTGTGT
	301	CCCCCACCTC CACCCTCAAC CCATCTTCCT AGTGTTTGTG
		AAATAAACTT
	351	GGTAT
T98	1	GATCTTCCAC GTCTCCATCT CAGTACACAA TCATTTAATA
		TTTCCCTGTC
	51	TTACCCCTAT TCAAGCAACT AGAGGCCAGA AAATGGGCAA
		ATTATCACTA
	101	ACAGGTCTTT GACTCAGGTT CCAGTAGTTC ATTCTAATGC
		CTAGATTCTT
	151	TTGTGGTTGT TGCTGGCCCA ATGAGTCCCT AGTCACATCC
		CCTGCCAGAG
	201	GGAGTTCTTC TTTTGTGAGA GACACTGTAA ACGACACAAG
		AGAACAAGAA
	251	TAAAA
933	1	TTATATATTT TTCTTAAATA TGTTTTATTG TCTTCTCTAA
		GCAAAAAGTT
	51	CTTAATAAAC ATAGTATTTC TCTCTGCGTC CTATTTCATT
		AGTGAAGACA
	101	TAGTTCACCT AAAATGGCAT CCTGCTCTGA ATCTAGACTT
		TTTAGAAATG
	151	GCATATGTTT TTGATGATAT GTCAACATTC AAAATAGTCC
		TAATTAAATT
	201	GTTGGTTAAA TGTAATGTCA ACTCTTTATA AACTTAAATA
		TAAACAAGTA
	251	ATTAACCACT CTAAGTAATA AAACACATTT CACCTGTGTT
		CTGAGTGTA
967	1	ATGAATCCTT GCCACCTCCA CCTGCAGAAC TGTTATAAAT
		ATTACAACTT
	51	GCTTTTTAGC TGATCTTCCA TCCTCAAATG ACTCTTTTTT
		CTTTATATGT
	101	TAACATATAT AAAATGGCAA CTGATAGTCA ATTTTGATTT
		TTATTCAGGA
	151	ACTATCTGAA ATCTGCTCAG AGCCTATGTG CATAGATGAA
		ACTTTTTTTT
	201	AAAAAAAGTT ATTTAACAGT AATCTATTTA CTAATTATAG
		TACCTATCTT
	251	TAAAGTATAG TACATTTTAC ATATGTAAAT GGTATGTTTC
		AATAATTTAA
	301	GAACTCTGAA ACAATCTACA TATACTTATT ACCCAGTACA
		GTTTTTTTTC
	351	CCCTGAAAAG CTGTGTATAA AATTATGGTG AATAAACTTT
		TATGTTTCCA
	401	TTTCAAAGAC CAGGGTGGAG AGGAATAAGA GACTAAGTAT
		ATGCTTCAAG
	451	TTTTAAATTA ATACCTCAGG TATTAAAATA AATATTCCAA
		GTTTGTGGGA
	501	AATGGGGAGA TTAAAATG
978	1	TTATGTGGCC TTAGGTAGCT GGTTGTACAT CTTTCCCTAA
		ATCGATCCAT
	51	GTTACCACAT AGTAGTTTTA GTTTAGGATT CAGTAACAGT
		GAAGTGTTTA
	101	CTATGTGCAA CGGTATTGAA GTTCTTATGA CCACAGATCA
		TCAGTACTGT
	151	TGTCTCATGT AATGCTAAAA CTGAAATGGT CCGTGTTTGC
		ATTGTTAAAA
	201	ATGATGTGTG AAATAGAATG AGTGCTATGG TGTTGAAAAC
		TGCAGTGTCC
	251	GTTATGAGTG CCAAAAATCT GTCTTGAAGG CAGCTACACT
		TTGAAGTGGT
	301	CTTTGAATAC TTTTAATAAA TTTATTTTGA TA
981	1	TAGGTGAACC CTTATTCTGC AGGGTTCTCC CTCCCACCTT
		AAAGAAGTTC
	51	CCCTTATGTG GGTTGCCTGG TGAATGGCCT TCCTTCCCGC
		CAGAGGGCTT
	101	GTGAACAGAC CGGAGAGGAC AGTGGATTGT TTATACTCCA
		GTGTACATAG
	151	TGTAATGTAG CGTGTTTACA TGTGTAGCCT ATGTTGTGGT
		CCATCAGCCC
	201	CTCACATTCC TAGGGGTTTG AGATGCTGTA CGTGGTATGT
		GACACCAAAG
	251	CCACCTCTGT CATTTGTTGT GATGTCTTTT CTTGGCAAAA
		GCCTTGTGTA
	301	TATTTGTATA TTACACATTT GTACAGAATT TTGGAAGATT
		TTCAGTCTAG
	351	TTGCCAAATC TGGCTCCTTT ACAAAAG
982	1	AGAATCTCTT ATGTTCTCAG AGGAAGGTGG AAGAAACCAT
		GGGCAGGAGT
	51	AGGAATTGAG TGATAAACAA TTGGGCTAAT GAAGAAAACT
		TCTCTTATTG
	101	TTCAGTTCAT CCAGATTATA ACTTCAATGG GACACTTTAG
		ACCATTAGAC
	151	AATTGACACT GGATTAAACA AATTCACATA ATGCCAAATA
		CACAATGTAT
	201	TTATAGCAAC GTATAATTTG CAAAGATGGA CTTTAAAAGA
		TGCTGTGTAA
	251	CTAAACTGAA ATAATTCAAT TACTTATTAT TTAGAATGTT
		AAAGCTTATG
	301	ATAGTCTTTT CTAATTCTTA ACACTCATAC TTGAAATCTT
		TCTGAGTTTC
	351	CCCAGAAGAG AATATGGGAT TTTTTTTGAC ATTTTTGACT
		CATTTAATAA
	401	TGCTCTTGTG TTTACCTAGT ATATGTAGAC TTTGTCTTAT
		GTGTCAAAAG
	451	TCCTAGGAAA GTGGTTGATG TTTCTTATAG CAATTAAAAA
		TTATT
905	1	ATCTCAGTGA GCTGAGATCA CACCACTGCA CTCCAACTGG
		GCGACAGAGC
	51	AAGA
910	1	GATCTGTAAT TCAGGTGTTT TCTGTACAGC CATACGTAGA
		TAATGAAGCC
	51	AAAAGGCTTT TAATTACACC ATGGCCTAAA ATAAATTCAT
		CA
915	1	TATTTTTCAG CTGAGTTATT AGGGAGTCAT TATTCTGTGG
		TACAATGCTG
	51	CAAAAAGCAT CATGTGGAAG AATGGGAACT ATGCTTACAT
		TATGAAGTGA
	101	TGTATAACAC AATGCAAATC TG
916	1	GATCTTTTTT CATTAAAAAA TGTTCAATTA TCAGGCCGGG
		TGCAGTGGGG
	51	CTCATGCCTG TAATCCCAAC ACTTTGGGAG GCCGATGCAG
		GCGGATCACT
	101	AGGTCAGCAG ATCGAGACCA TCCTGGCTAA CACAGTGAAA
		CCT
921	1	GATCTTTATT TTTAGCCATG CACTGTTGTG AGGAAAATTA
		CCTGTCTTGA
	51	CTGCCATGTG TTCATCATCT TAAGTATTGT AAGCTGCTAT
		GTATGGATTT
	101	AAACCGTAAT CATATCTTTT TCCTATCTAT CTGAGGCACT
		GGTGGAATAA
	151	AGAACCTGTA TATTTTACTT TGTTGCAGAT AGTCTTGCCG
		CATCTTGGCA
	201	AGTTGCAGAG A
927	1	GATCTTCGTG AAGACCTGAC TGGTAAGACC ATCACCCTCG
		AGGTGGAGCC
	51	CAGTGACACC ATCGAGAATG TCAAGGCAAA GATCCAAGAT
		AAGGAAGGCA
	101	TCCCTCCTGA TCAGCAGAGG TTGATCTTTG CTGGGAAACA
		GCTGGAAGAT
	151	GGACGCACCC TGTCTGACTA CAACATCCAG AAAGAGTCCA
		CTCTGCACTT
	201	GGTCCTGCGC TTGAGGGGGG GTGTCTAAGT TTCCCCTTTT
		AAGGTTTCAA
	251	CAAATTTCAT TGCACTTTCC TTTCAATAAA GTTG
928	1	GATCTTTCCT CCTGGTTACT GTGAAGCCTG TTGGTTTGCT
		GCTGTCGTTT
	51	TTGAGGAGGG CCCATGGGGG TAGGAGCAGT TGAACCTGGG
		AACAAACCTC
	101	ACTTGAGCTG TGCCTAGACA ATGTGAATTC CTGTGTTGCT
		AACAGAAGTG
	151	GCCTGTAAGC TCCTGTGCTC CGGAGGGAAG CATTTCCTGG
		TAGGCTTTGA
	201	TTTTTCTGTG TGTTAAAGAA ATTCAATCTA CTCATGATGT
		GTTATGCATA
	251	AAACATTTCT GGAACATGGA TTTGTGTTCA CCTTAAATGT
		GAAAATAAAT
930	1	GATCTTTCGG GTTCTCTCTC CTAACTCAGC TCTTCGTTCC
		CAGAAACCCA
	51	GATGTAATCC CCCTACGTGG TGCTTGGGGC ATCCCGATAC
		CATCTCAGTA
	101	AATCTCCTAC ATTGGCCTCC TCACCCTCCC CGGGACCCAC
		ACCCTTCAGG
	151	TCCTCACCCT GAGACAGGAG GGACCCTCTG AGATCAGGGA
		CCCTTAGGTC
	201	TCACTGGTCT CTGATTCATA GCTCAACTGG GCCCCCAGTT
		CCATACCCCA
	251	GCATTCCCGG TCACTCCCTC CCTAATCTGA GCATCACTCA
		AGCTCTTTAT
	301	TAAACTC
939	1	ATCTCTCTCC CTACGCAAAA CCCTATTGTA GTAAAAAAGT
		CTTCTTTACT
	51	ATCTTAATAA AACAGATATT GTG
945	1	ATCTATTCTT GTAGATTTTT TTTGTGTGGG TCTATGTTTC
		ATTCATCTGC
	51	TTTCAGGCTG GATTTATAAC AAGCAGAACT TTTAAAACG
949	1	GATCTAAATA TTTTTCAGCT GAGTTATTAC GGAGTCATTA
		TTCTGTGGTA
	51	CAATGCTGCA AAAAGCATCA TGTGGAAGAA TGGGAACTAT
		GCTTACTTTA
	101	TGAAGTGATG TATAACACAA TGAAA
952	1	CTACCCCGTG ACTCAGTTAC CTCCCACTGG GTCCCTCCCA
		CATCATGTGG
	51	GAATTGTAGG AGCTACAATT CAAGATGAGA TTTGGATGGG
		GTCACAGCCA
	101	AACCATATCA CTGAGGTATC AAGGAGATTC TT
954	1	GATCTGATTT GCTAGTTCTT CCTTGTAGAG TTATAAATGG
		AAAGATTACA
	51	CTATCTGATT AATAGTTTCT TCATACTCTG CATATAATTT
		GTGGCTGCAG
	101	AATATTGTAA TTTGTTGCAC ACTATGTAAC AAAACAACTG
		AAGATATGTT
	151	TAATAAATAT TGTACTTATT G
975	1	NGATCTTTCT CCTTGAATAT CTTTCGATAA ACAACAAGGT
		GGTGTGATCT
	51	TAATATATTT GAAAAAAACT TCATTCTCGT GAGTCATTTA
		AATGTGTACA
	101	ATGTACACAC TGGTACTTAG AGTTTCTGTT TGATTCTTTT
		TTAATAAA
976	1	GATCTGCTAG AAGATGGTTT TGGAGAGCAC CCCTTTTACC
		ACTGCCTGGT
	51	TGCAGAAGTG CCGAAAGAGC ACTGGACTCC GGAAGGTAAC
		CCCTCGCCCT
	101	TTCCAGAAGC CAGAGAGACC AAGTGTTATG TAAGAAGTAG
		TGTCGGCTGT
	151	GTAGAACCAC TGACTACACA GGCCGAAGTT ACTGAGAACT
		TGGACAGAAA
	201	AAATAGCCAG CAAGTGTT
984	1	CATTCACACA TTTAACCTCC TTCCATACCA AATCTT
986	1	GATCTGGACA GCAGAATGTT ATAACGCAAG TTCATGTGTT
		GCTCCCAACT
	51	CCATTCTCTT TTCTCTCGTG CAACCAGTTT GCCCATTCTC
		TTCCTATTAC
	101	TTGCTC
T11	1	TCAGAGATTT GCAAAGACTC ACGTTTTTGT TGTTTTCTCA
3		TCATTCCATT
	51	GTGATACTAA GAAACTAAGA AGCTTAATGA AAAGAAATAA
		AATGCCTATG
T11	1	GATCTGCGCT TCCAGAGCGC AGCTATCGGT GCTTTGCAGG
6		AGGCAAGTGA
	51	GGCCTATCTG GTTGGCCTTT TTGAAGACAC CAACCTGTGT
		GCTATCCATG
	101	CCAAACGTGT AACAATTATG CCAAAAGACA TCCAGCTAGC
		ACGCCGCATA
	151	CGTGGAGAAC GTGCTTAAGA ATCCACTATG ATGGGAAACA
T12	1	GATCTGTGAA ATGCTATCTC TCCTGAAGCA ATACTGTTGA
3		CCAGAAAGGA
	51	CACTCCATAT TGTGAAACCG GCCTAATATT TCTGACTGAT
		ATGGAAACGA
	101	TTGCCAACAC ATACTTCTAC TTTTAAATAA ACAACTTTGA
		TGATGTAACT
	151	TGACCTTCCA GAGTTATGGA AATTTTGTCC CCATGTAATG
		AATAAATTGT
	201	ATGTAT

EXAMPLE 4

Production of Expression Profiles Generated from cDNAs Made with RNA Isolated from Neutrophils Isolated from a Subject with a Sterile Inflammatory Disease.

Neutrophils are isolated from normal donor peripheral blood following the LPS-free method or from subjects exhibiting the symptoms of a sterile inflammatory disease. RNA is extracted and the gene expression profiles prepared as described in Example 1.

To determine the identity of genes (cDNAs) which are differentially expressed in the neutrophils isolated from a subject exhibiting the symptoms of a sterile inflammatory disease, the cDNA profiles prepared from neutrophils from said subject are compared to profiles prepared from neutrophils isolated from the normal donor. Bands which exhibit altered intensities when compared between the gene expression profiles prepared from neutrophils from said subject and profiles prepared from neutrophils isolated from the normal donor are then extracted from the display gel as previously described in Example 1. The isolated fragments are then reamplified using 5′ and 3′ primers, subcloned into pCR-Script (Stratagene) and sequenced using an ABI automated sequencer.

Once sequences are obtained which correspond to the bands of interest, the sequences can be compared to known nucleic acid sequences in the available data bases.

EXAMPLE 5

Method to Identify a Therapeutic or Prophylactic Agent that Modulates the Response of a Granulocyte Population to a Pathogen

The methods set forth in Example 1 offer a powerful approach for identifying therapeutic or prophylactic agents that modulate the expression of neutrophils or other granulocytic cells to a pathogen. For instance, profiles of normal granulocytes and neutrophils or other granulocytes exposed to pathogens such as E. coli, Y. pestis or other pathogenic bacteria are prepared as set forth in Example 1. A profile is also prepared from a granulocyte population that has been exposed to the pathogen in the presence of the agent to be tested. By examining for differences in the intensity of individual bands between the three profiles, agents which up or down regulate genes of interest in the pathogen exposed granulocytes can be identified.

As a specific example, screening for agents which up or down regulate the expression of human pre-B cell enhancing factor (PBEF) can be identified by examining the differences in band intensity between profiles produced from normal granulocytes, granulocytes exposed to the pathogen and granulocytes exposed to the pathogen in the presence of the agent to be tested. As showy in FIG. 4. PBEF is expressed at high levels when exposed to avirulent bacteria, including E. coli K12 and avirulent Y. pestis but is not expressed at high levels in granulocytes exposed to pathogenic Y. pestis. Agents that up regulate PBEF expression as demonstrated by increased band density in the profile produced from granulocytic cells exposed to virulent Y. pestis in the presence of the agent may be useful in modulating the response of neutrophils to bacterial infection.

EXAMPLE 6

Method to Identify a Therapeutic or Prophylactic Agent that Modulates the Expression of Genes in a Granulocyte Cell Population Found in a Subject Having a Sterile Inflammatory Disease.

The methods set forth in Example 4 offer a powerful approach for identifying therapeutic or prophylactic agents that modulate the expression of neutrophils or other granulocytic cells in subjects exhibiting the symptoms of a sterile (non-infectious) inflammatory disease. For instance, gene expression profiles of normal granulocytes and granulocytes from a subject exhibiting the symptoms of a sterile inflammatory disease are prepared as set forth in Examples 1 and 4. A profile is also prepared from a granulocyte population from a subject exhibiting the symptoms of a sterile inflammatory disease that have been exposed to the agent to be tested. By examining these profiles for differences in the intensity of banid between the three profiles, agents which up or down regulate genes of interest in a granulocytic population from a subject exhibiting the symptoms of a sterile inflammatory disease can be identified. Agents that up-regulate a gene or genes that are expressed at abnormally low levels in a granulocytic cell population from a subject exhibiting the symptoms of a sterile inflammatory disease compared to a normal granulocytic cell population as well as agents that down regulate a gene or genes that are expressed at abnormally high levels in a granulocytic cell population from a subject exhibiting the symptoms of a sterile inflammatory disease are contemplated.

EXAMPLE 7

Production of Solid Support Compositions Comprising Groupings of Nucleic Acids that Correspond to the Genes whose Expression Levels are Modulated in a Granulocytic Population that has been Exposed to a Pathogen or Nucleic Acids that Correspond to the Genes Whose Expression Levels are Modulated in a Granulocytic Cell Population from a Subject Having a Sterile Inflammatory Disease.

As set forth in Examples 1-4, expression profiles from granulocytic cells exposed to a pathogen or granulocytic cells from a subject having a sterile inflammatory disease yield the identity of genes whose expression levels are modulated compared to normal. quiescent granulocytic cells.

Solid supports can be prepared that comprise immobilized representative groupings of nucleic acids corresponding to the genes or fragments of said genes from granulocytic cells whose expression levels are modulated in response to exposure to a pathogen or in a subject having a sterile inflammatory disease. For instance, representative nucleic acids can be immobilized to any solid support to which nucleic acids can be immobilized, such as positively charged nitrocellulose or nylon membranes (see Sambrook et al. (1989) Molecular Cloning: a laboratory manual 2nd. Cold Spring Harbor Laboratory) as well as porous glass wafers such as those disclosed by Beattie (WO 95/11755). Nucleic acids are immobilized to the solid support by well established techniques, including charge interactions as well as attachment of derivatized nucleic acids to silicon dioxide surfaces such as glass which bears a terminal epoxide moiety. A solid support comprising a representative grouping of nucleic acids can then be used in standard hybridization assays to detect the presence or quantity of one or more specific nucleic acid species in a sample (such as a total cellular mkNA sample or cDNA prepared from said mRNA) which hybridize to the nucleic acids attached to the solid support. Any hybridization methods, reactions, conditions and/or detection means can be used, such as those disclosed by Sambrook et al. (1989) Molecular Cloning: a laboraton, manual 2nd., Cold Spring Harbor Laboratory, Ausbel et al. (1987) Current Protocols in Molecular Biology, Greene Publishing and Wiley-Interscience or Beattie (WO 95/11755).

One of ordinary skill in the art may determine the optimal number of genes that must be represented by nucleic acid fragments immobilized on the solid support to effectively differentiate between samples, e.g. neutrophils exposed to various pathogens or neutrophils isolated from a patient to be tested for a sterile inflammatory disease. Preferably, at least about 5, 10, 20, 50, 100, 150, 200, 300, 500, 1000 or more preferably, substantially all of the detectable mRNA species in a cell sample or population will be present in the gene expression profile or array affixed to a solid support. More preferably, such profiles or arrays will contain a sufficient representative number of mRNA species whose expression levels are modulated under the relevant infection, disease, screening, treatment or other experimental conditions. In most instances, a sufficient representative number of such mRNA species will be about 1, 2, 5, 10, 15, 20, 25, 30, 40, 50, 50-75 or 100 in number and will be represented by the nucleic acid molecules or fragments of nucleic acid molecules immobilized on the solid support. For example, nucleic acids encoding all or a fragment of one or more of the known genes or previously reported ESTs that are identified in FIG. 4 and Tables 1 and 2 may be so immobilized. The skilled artisan will be able to optimize the number and particular nucleic acids for a given purpose, i.e., screening for modulating agents, identifying activated granulocytes, etc.

EXAMPLE 9

Method of Diagnosing Exposure of a Subject to a Pathogen.

Expression profiles of RNA expression levels from neutrophils exposed to various bacteria, such as those disclosed in Examples 1 and 3, offer a powerful means to diagnose exposure of a subject to a pathogen. As set forth in Examples 1 and 3, the display patterns generated from cDNAs made with RNA isolated from neutrophils exposed to pathogenic and nonpathogenic E. coli and Y pestis exhibit unique patterns of cDNA species corresponding to neutrophil mRNA species (genes) whose expression levels are modulated in response to contact of the neutrophils with the bacteria. The contacting of neutrophils with different species of pathogens may result in the production of expression profiles that are unique to each pathogen species or strain. These unique expression profiles are useful in diagnosing whether a subject has been exposed to or is infected with a given pathogen.

Briefly, expression profiles are produced as set forth in Example 1 using neutrophil samples exposed to various pathogens, such as pathogenic strains of E. coli, Y. pestis, Staphylococci, Streptococci or any other bacterial species. Neutrophils are then isolated from the subject to be tested for exposure to a pathogen and an expression profile prepared from the subject's neutrophils by the methods set forth in Example 1. The expression profile prepared from the subject neutrophils can then be compared to the expression profiles prepared from neutrophils exposed to the various pathogen species or strains to determine which expression profile most closely matches the expression profile prepared from the subject, thereby, diagnosing exposure of the subject to a pathogen.

EXAMPLE 10

Method of Diagnosing a Sterile Inflammatory Disease in a Subject

Expression profiles of RNA expression levels from neutrophils isolated from a subject having a sterile inflammatory disease, such as those disclosed in Example 4, offer a powerful means to diagnose inflammatory diseases such as psoriasis, rheumatoid arthritis, glomerulonephritis, asthma, cardiac and renal reperfusion injury, thrombosis, adult respiratory distress syndrome, inflammatory bowel diseases such as Crohn's disease and ulcerative colitis and periodontal disease. As set forth in Example 4, the gene expression profiles generated from cDNAs made with RNA isolated from neutrophils from subjects having various sterile inflammatory diseases may exhibit unique patterns of cDNA species corresponding to neutrophil mRNA species (genes) whose expression levels are modulated during the inflammatory process. These unique expression profiles are useful in diagnosing whether a subject has a sterile inflammatory disease.

Briefly, expression profiles are produced as set forth in Examples 1 and 4 using neutrophil samples isolated from patients with various sterile inflammatory diseases. Neutrophils are then isolated from the subject to be tested and an expression profile prepared from the subject's neutrophils by the methods set forth in Example 1. The expression profile prepared from the subject neutrophils can then be compared to the expression profiles prepared from neutrophils isolated from patients with various sterile inflammatory diseases to determine which expression profile most closely matches the expression profile prepared from the subject, thereby, diagnosing whether the subject has a sterile inflammatory disease.

It should be understood that the foregoing discussion and examples merely present a detailed description of certain preferred embodiments. It therefore should be apparent to those of ordinary skill in the art that various modifications and equivalents can be made without departing from the spirit and scope of the invention. All articles, patents and texts that are identified above are incorporated by reference in their entirety.

Claims

1. A method to identify a therapeutic or prophylactic agent that modulates the response of a granulocyte population to a pathogen, comprising the steps of:

preparing a first gene expression profile of a quiescent granulocyte population;

preparing a second gene expression profile of a granulocyte population exposed to the pathogen;

treating the exposed granulocyte population with the agent;

preparing a third gene expression profile of the treated granulocyte population;

comparing the first, second and third gene expression profiles; and

identifying agents that modulate the response of a granulocytic population to the pathogen.

2. The method of claim 1, wherein the granulocyte population is selected from the group consisting of a population of neutrophils, basophils and eosinophils.

3. The method of claim 1, wherein the pathogen is selected from the group consisting of bacteria, viruses, fungi and parasites.

4. The method of claim 3 wherein the pathogen is selected from the group consisting of Gram positive and Gram negative bacteria.

5. The method of claim 3, wherein the pathogen is selected from the group consisting of Staphylococci, Streptococci, Clostridia, Neisseria, Enterobacteriaceae, Helicobacter, Vibrio, Campylobacter, Pseudomonas, Haemophilus, Bordetella, Mycoplasma, Ureaplasma, Legionella, Spirochetes, Mycobacteria, Actinomyces, Nocardia, Chlamydia, Rickettsia, Coxiella, Ehrilichia, Rochalimaea, Brucella, Yersinia, Fracisella, and Pasteurella.

6. A method to identify a therapeutic agent that modulates the expression of at least one gene in a granulocyte population found in a subject having a sterile inflammatory disease; comprising the steps of:

preparing a first gene expression profile of a granulocyte population in a subject having the sterile inflammatory disease;

treating the granulocyte population with the agent;

preparing a second gene expression profile of the treated granulocyte population;

comparing the first and second gene expression profiles with the gene expression profile of a normal granulocyte preparation; and

identifying an agent that modulates the expression of at least one gene whose transcription levels are altered in the granulocyte population of the subject as compared with normal granulocyte population.

7. The method of claim 6, wherein the granulocyte population is selected from the group consisting of a population of neutrophils, basophils and eosinophils.

8. The method of claim 6, wherein the sterile inflammatory disease is selected from the group consisting of psoriasis, rheumatoid arthritis, glomerulonephritis, asthma, cardiac and renal reperfusion injury, thrombosis, adult respiratory distress syndrome, inflammatory bowel diseases such as Crohn's disease and ulcerative colitis and periodontal disease.

9. A composition comprising a grouping of nucleic acids that correspond to the genes or fragments of genes whose expression levels are modulated in a granulocyte population that has been exposed to a pathogen affixed to a solid support.

10. A composition comprising a grouping of nucleic acids that correspond to the genes or fragments of genes whose expression levels are modulated in a granulocyte population found in a subject having a sterile inflammatory disease affixed to a solid support.

11. A method of diagnosing exposure of a subject to a pathogen, comprising the steps of:

preparing a first gene expression profile of a granulocyte population from the subject;

comparing the first gene expression profile to a second gene expression profile of a granulocyte population exposed to the pathogen and to a third gene expression profile of a normal granulocyte preparation; and

determining if the subject was exposed to a pathogen.

12. A method of diagnosing a sterile inflammatory disease in a subject, comprising the steps of:

preparing a first gene expression profile of a granulocyte population from the subject;

comparing the first gene expression profile to at least one second gene expression profile from a granulocyte population from a subject having a sterile inflammatory disease and to a third gene expression profile of a normal granulocyte population; and

determining if the subject has a sterile inflammatory disease.

13. The method of claim 12, wherein the sterile inflammatory disease is glomerulo-nephritis.