Abstract: A unique anti-platelet monoclonal antibody which binds to human platelet glycoprotein IV, and various utilities of the monoclonal antibody are described.

Abstract: Polypeptides having a segment capable of binding to immunoglobulin heavy chain variable regions (V.sub.H) in an antigen independent manner have been described. These polypeptides can be used to form complexes with V.sub.M containing molecules for diagnostic purposes and to increase the affinity of the antibody for its antigen. Additionally, the polypeptides of the invention can be used to separate V.sub.H containing molecules from solution to form isolated V.sub.H or V.sub.H depleted compositions.

Abstract: Disclosed are monoclonal antibodies having an affinity for endothelin-3 or a precursor thereof; a hybridoma cell which produces the monoclonal antibody; and an immunoassay of endothelin-3 and big endothelin-3, a precursor of endothelin-3, by a sandwich method or a competitive method. The monoclonal antibodies can be used as strong antagonists for endothelin-3 in various endothelin-3-related diseases, and the immunoassays make it possible to determine endothelin-3 and big endothelin-3 with high sensitivity.

Abstract: New hybridoma cell lines which synthesize highly specific monoclonal antibodies (mAb) against human tumor necrosis factor (TNF), monoclonal antibodies against TNF, a process for the preparation of such hybridoma cell lines and antibodies, and the use of the monoclonal antibodies are described.

Abstract: Antigenic epitopes associated with the extracellular segment of the domain which anchors immunoglobulins to the B cell membrane are disclosed. For IgE, the epitopes are present on IgE-bearing B cells but not basophils or the secreted, soluble form of IgE. DNA constructs encoding chimeric antibodies, with murine variable regions and human constant regions, which bind to this epitope, can be produced and expressed in transfected mycloma cells.

Abstract: B-cell lymphomas express surface immunoglobulin (immunoglobulin) containing unique idiotypic (idiotype) determinants which may be exploited as tumor specific markers. The inventor has produced murine monoclonal antibodies (MAbs) reactive with the idiotype marker derived from 67 patients with low grade, follicular, small cleaved cell lymphoma. Out of 199 monoclonal antibodies, 47 (24%) were found to react with pooled normal human serum immunoglobulin in concentrations ranging from 0.6 .mu.g/ml to 160 .mu.g/ml. Of these 40 monoclonal antibodies, 90% cross-reacted with idiotype present in normal serum in levels <50 .mu.g/ml. Thirty-two of these anti-idiotypes were directed against a shared idiotope expressed on another patient's lymphoma cells. The frequency of shared idiotope expression defined by each antibody ranged from 0.26% to 3.9% of the B-cell lymphomas tested. A panel of five anti-idiotype antibodies reacted with 80% of AIDS associated lymphomas.

Abstract: Monoclonal antibodies that bind specifically to prostate carcinoma and do not bind substantially to normal prostate or benign prostatic hyperplasia, as well as hybridoma cell lines producing the monoclonal antibodies are disclosed. In one embodiment, a monoclonal antibody designated MAb PD41 is disclosed. A new antigen designated prostate mucin antigen is disclosed in isolated, substantially pure form. In addition, methods for using the hybridoma cell lines, the monoclonal antibody and/or the antigen for diagnosis, prophylaxis and/or treatment of prostate carcinoma are disclosed.

Abstract: An altered antibody is produced by replacing the complementarity determining regions (CDRs) of a variable region of an immunoglobulin (Ig) with the CDRs from an Ig of different specificity, using recombinant DNA techniques. The gene coding sequences for producing the altered antibody may be produced by site-directed mutagenesis using long oligonucleotides.

Abstract: The subject invention relates to a novel method for vectored delivery of physiologically-active chemical agents to a target organ, tissue or cell of interest and uses thereof. In particular, medical vectoring reagents which localize in a specific target organ, tissue or cell are conjugated with a drug or therapeutic agent using a linking agent, and the resulting conjugate is then introduced into the body. The chemical agent is thereby localized in the target organ, tissue or cell for effecting a therapeutic or physiological benefit or change therein.

Abstract: The present invention provides a composition consisting of a monoclonal antibody that defines an epitope found on an antigen antigen/normal cross-reacting antigen produced by hybridoma XMMBR-B14 (HB 9308) conjugated to a detectable moiety, and a kit containing the antibody. Hybridoma XMMBR-B14 was deposited with the ATCC on Jan. 14, 1987 and given the ATCC Accession No. HB 9308.

Abstract: High-affinity murine monoclonal antibodies to t-PA were prepared which prolong the in vivo functional half-life of t-PA without decreasing its plasminogen-activator activity.

Abstract: The selectivity of immunoselection systems employing insolubilized avidin and biotinylated specific antibody is amplified, and nonspecific recovery is improved, by employing an indirect sandwich technique using a biotin-conjugated antispecies immunoglobulin that is directed to one or more nonbiotinylated specific antibodies in conjunction with insolubilized avidin. Specific cell populations can be removed and recovered from bone marrow, providing excellent recovery of bone marrow and preservation of hematopoietic stem cells for transplantation. Mixed populations of T cells or of tumor cells can be conveniently and simultaneously removed with minimal manipulation of the marrow cells. An improved positive immunoselection method provides viable and functional recovered cells, e.g., hematopoietic stem cells or activated killer cells, that can be clinically employed.

Abstract: A DNA fragment containing a promoter region for human polypeptide chain elongation factor-1.alpha., its base sequence and expression plasmids containing the DNA fragment having high applicability to a wide range of host cells with high expression capacity. These expression plasmids can be maintained stably for at least one month in mammalian host cells. Such features of the expression plasmids may render possible the efficient production of various kinds of useful physiologically active substances for a long period using wide range of mammalian cells as the host.

Abstract: An immunometric assay is disclosed for biologically active tumor necrosis factor in a biological sample comprising, forming a complex of a first labeled monoclonal antibody, biologically active TNF, and a second monoclonal antibody which can be bound to an insoluble substrate and detecting the amount of label associated with the complex. The assay is characterized by employing first and second monoclonal antibodies which react with the same epitopic site on TNF-alpha monomer. A method is also disclosed for blocking accelerated TNF degradation in a non-preserved biological sample, such as blood, comprising contacting the biological sample with EDTA, luminol, or a combination thereof.

Abstract: The subject invention relates a method for the production of monoclonal antibodies. The method utilizes an immunized antigen free animal. The invention also provides a method for the use of such monoclonal antibodies, and polyclonal antibodies derived from an immunized antigen free animal, for in vitro and in vivo clinical diagnostics and therapeutics. Also, the subject invention provides a fibrin-specific monoclonal antibody.

Abstract: Cells producing a desired product or products, such as antibodies, are cultured with a culture medium comprising lymph. The lymph is continuously flowed across a semi-permeable membrane, on the other side of which are the cells to be cultured. The membrane is sized so as to retain cells, and their desired products, on one side of the membrane while permitting components of the lymph-containing culture medium (flowing across the other side of the membrane) to pass through the membrane to provide nutrition, etc. to the culturing cells.

Abstract: The present invention provides an altered antibody molecule wherein a residue in a surface pocket on the molecule has been changed to a cysteine residue to introduce a thiol group in the surface pocket and a process for its production by recombinant DNA technology.

Abstract: Adherent 293 human kidney cells are continuously cultured in suspension in serum-free medium. Fresh medium is fed into a culture vessel and spent medium is withdrawn from the vessel. The 293 cells are maintained in small aggregates in suspension at a density of at least 3.times.10.sup.6 cells/ml for 30 days. The formation of large cell clumps is prevented by maintaining the concentration of calcium in the serum-free medium at 0.002 mM to 0.3 mM.

Abstract: Disclosed are immunologically active polypeptides, preferably antibodies or antibody fragments, and most preferably monoclonal antibodies, which are reactive with idiotypes of antibodies to human lymphocyte T4 protein and are reactive with the HIV virion in a manner allowing for in vitro and in vivo neutralization of HIV infectivity and detection of HIV particles in biological fluids. Presently preferred embodiments comprise monoclonal anti-monoclonal-anti-human lymphocyte T4 antibodies produced by new murine hybridoma cell lines JT4C8, JT4C12, JT4C16, JT1-1F3, JT1-1F3-E5, JT1-1D7 and JT2-N15. Also disclosed are active and passave vaccination procedures.

Abstract: Disclosed is isolated DNA encoding a D.sub.1B -dopamine receptor selected from the group consisting of: (a) isolated DNA which encodes rat D.sub.1B -dopamine receptor; (b) isolated DNA which hybridizes to isolated DNA of (a) above and which encodes a D.sub.1B -dopamine receptor; and (c) isolated DNA differing from the isolated DNAs of (a) and (b) above in codon sequence due to the degeneracy of the genetic code, and which encodes a D.sub.1B dopamine receptor Vectors and host cells containing the same, assay procedures employing D.sub.1B -dopamine receptors, oligonucleotide probes for identifying D.sub.1B -dopamine receptors, and isolated and purified D.sub.1B -dopamine receptors are also disclosed.