Abstract: The present invention relates to immunotherapy strategies for the treatment of malignancies. The present immunotherapy strategies have gangliosides as a target. Gangliosides are glycosphingolipids which are present on normal cells and on malignant cells. On malignant cells they are more abundant and expressed in a different organization and conformation. The present invention provides antibodies which recognize these gangliosides, which antibodies are specific, have recurrent idiotypes and have value as immunoregulators. The invention further provides anti-idiotypic antibodies against anti-ganglioside antibodies. These are useful in vaccination strategies.

Abstract: The present invention provides antibodies capable of discriminating between native human MGMT and an active site alkylated form of this enzyme in an immunoprecipitation procedure.Monoclonal antibodies having such discriminating ability are obtainable from hybridoma ECACC 92112510 and hybridoma ECACC 93112514, which were deposited at the European Collection of Animal Cell Cultures, UK under the Budapest Treaty on 25th Nov. 1992 and 25th Nov. 1993 respectively. The monoclonal antibody of hybridoma ECACC 92112510 has been designated Mab 5H7. The monoclonal antibody of hybridoma ECACC 93112514 has been designated Mab 3C7.

Abstract: The present invention features stable bulking agents and blocking agents for solid phase materials containing proteins. The proteins have thiol groups which are blocked or chemically inert, preventing the formation of aggregates. Chemical solutions wherein thiol groups, if present, are blocked or chemically inert, are particularly useful in analytical applications and in diagnostic reagents utilizing solid phase materials or particles.

Abstract: Proteins, peptides, analogs thereof and antibodies thereto which will inhibit the adhesion of circulating molecules such as leukocytes to endothelia and epithelia.

Abstract: A reshaped human antibody to the human IL-6R, comprising:(A) an L chain comprising,(1) a human L chain C region, and(2) an L chain V region comprising human L chain framework regions (FRs), and mouse L chain complementary determination regions (CDRs) of a monoclonal antibody to the IL-6 receptor (IL-6R); and(B) an H chain comprising,(1) a human H chain C region, and(2) an H chain V region comprising human H chain FRs, and mouse H chain CDRs of a monoclonal antibody to the IL-6R.Since major portion of the reshaped human antibody is derived from a human antibody and the mouse CDRs which are less immunogenic, the present reshaped human antibody is less immunogenic to human, and therefor is promised for therapeutic uses.

Abstract: Monoclonal antibodies, and hybridomas that express the antibodies, which are immunospecific for a novel human .beta..sub.2 integrin alpha subunit polypeptide are disclosed.

Abstract: The present invention provides methods of proliferating B cells as a means of obtaining large numbers of B cells. The present invention further provides methods of differentiating a proliferating B cell population to antibody producing cells.

Abstract: The present invention is directed towards immunoglobulin polypeptides that specifically bind to the extracellular domain of the human type beta PDGF receptor. The binding of the immunoglobulin polypeptides to the receptor inhibits PDGF-induced (or stimulated) receptor activation as indicated by inhibition of receptor phosphorylation and dimerization, and by inhibition of PDGF-mediated mitogenesis, chemotaxis and migration of cells displaying the human PDGF type beta receptor on the cell surface. Nucleic acids encoding the immunoglobulin polypeptides are also included in the invention. The immunoglobulin polypeptides have diagnostic and therapeutic uses.

Abstract: The present invention relates to a LO-CD2a antibody and methods of using such antibodies or molecules that bind to the same epitope (or a portion thereof) to prevent and inhibit an immune response in human patients, preferably, where the immune response is mediated by the activation and proliferation of T cells or natural killer cells. The administration of an effective amount of the LO-CD2a antibody to a human patient will prevent or inhibit graft rejection, graft versus host disease or autoimmune disease.

Abstract: The epidermal growth factor receptor (EGFR) gene is amplified in 40% of malignant gliomas and the amplified genes are frequently rearranged. The genetic alterations associated with these rearrangements are characterized in five malignant gliomas. In one tumor, the rearrangement resulted in the deletion of most of the extracytoplasmic domain of the receptor, resulting in a hybrid mRNA between new sequences and the truncated EGFR. The predicted amino acid sequence of the protein from this tumor was remarkably similar to that described for several viral erb-B oncogenes. Four other tumors were noted to have internal deletions of the EGF receptor gene. These rearrangements brought about in-frame deletions affecting either of two cysteine-rich domains in the extracytoplasmic portion of the molecule. The clonal nature of these alterations, and the fact that identical alterations were seen in more than one tumor, suggests a role for these mutant receptor proteins in tumorigenesis.

Abstract: Novel compositions are provided that are derived from antigen-binding sites of immunoglobulins having affinity for cancer antigens. The compositions exhibit immunological binding properties of antibody molecules capable of binding specifically to a human tumor cell displaying a MDR phenotype. A number of synthetic molecules are provided that include CDR and FR regions derived from same or different immunoglobulin moieties. Also provided are single chain polypeptides wherein V.sub.H and V.sub.L domains are attached by a single polypeptide linker. The sFv molecules can include ancillary polypeptide moieties which can be bioactive, or which provide a site of attachment for other useful moieties. The compositions are useful in specific binding assays, affinity purification schemes, drug or toxin targeting, imaging, and genetic or immunological therapeutics for various cancers.

Abstract: Monoclonal antibodies directed to the laminin P1 domain for selective immunological determination of native, high molecular weight, intact laminins in body fluids; a process for preparing these antibodies; and their use for diagnosing diseases. These antibodies preferably bind to intact, native laminin, in particular to the structures of the laminin P1 domain of laminin which are folded in a native manner.

Abstract: Methods for producing functional immunoglobulin are provided. The methods involve transfecting and expressing exogenous DNA coding for the heavy and light chains of immunoglobulin. In some embodiments, chimeric immunoglobulins are provided having variable regions from one species and constant regions from another species by linking DNA sequences encoding for the variable regions of the light and heavy chains from one species to the constant regions of the light and heavy chains respectively from a different species. Introduction of the resulting genes into mammalian host cells under conditions for expression provides for production of chimeric immunoglobulins having the specificity of the variable region derived from a first species and the physiological functions of the constant region from a different species.

Abstract: The present invention relates to a method of inhibiting (reducing or preventing) the interaction of a cell which bears a surface molecule that interacts with a ligand comprising a Le.sup.x core with its target ligand by contacting the cell with an inhibitor comprising a Lewis x (Le.sup.x) core. The invention further relates to a method of inhibiting (reducing or preventing) the interaction or adhesion of endothelial cells and/or platelets with leukocytes (i.e., white blood cells), especially with nonlymphocytic leukocytes such as neutrophils and monocytes, by contacting the endothelial cells and/or platelets with an inhibitor comprising a Le.sup.x core under conditions whereby adhesion is inhibited.

Abstract: The present invention is directed to antibodies, in particular monoclonal antibodies, which specifically bind to somatotropin binding proteins of animals, but not with the corresponding somatotropin receptors. The antibodies may be used alone to enhance the growth of animals, or may be used together with somatotropin to potentiate the effect of somatotropin in animals. The antibodies may also be used to assay the level of somatotropin binding protein of animals.

Abstract: Antibodies which neutralize botulinum neurotoxin serotype F are produced using biologically active botulinum neurotoxin instead of toxoid for immunization and exploiting the importance of cross reaction between various serotypes to obtain immune responses, or monoclonal antibodies, to additional serotypes of interest. Methods of preparation and uses of the neutralizing botulinum neurotoxin antibodies are described.

Abstract: A protein and gene encoding it are disclosed which confer sensitivity to B. maydis T toxin and the insecticide methomyl, in cells carrying the gene and expressing the protein. Toxin sensitivity domains of the protein have been identified wherein a modification yields a toxin-insensitive product.

Abstract: The present invention discloses novel chimeric monoclonal antibodies directed against human carcinoembryonic antigen, having antigen-specific variable regions. DNA constructs for the light and heavy chain variable regions comprising the novel antibodies of the invention are also disclosed. Eukaryotic host cells capable of expression of the chimeric antibodies and comprising the novel chimeric antibody-encoding DNA constructs are also described.

Abstract: The present invention relates to: 1) A monoclonal antibody (mAb) that binds selectively to phosphorylated histone H1 and not to nonphosphorylated histone H1 and its use. In one embodiment, the mAb of the present invention binds selectively to histone H1 phosphorylated at the 12D11 epitope as defined herein, and 2) A cell producing a monoclonal antibody which binds selectively to phosphorylated histone H1 and has been shown to distinguish between histone H1 phosphorylated at the 12D11 epitope and histone H1 nonphosphorylated at this epitope.

Abstract: An anti-CD2 monoclonal antibody according to the present invention can be: (1) a chimeric monoclonal antibody CD2 SFv-Ig produced by expression of the construct cloned in recombinant Escherichia coli culture ATCC No. 69277; (2) a monoclonal antibody having complementarity-determining regions identical with those of CD2 SFv-Ig; or (3) a monoclonal antibody competing with CD2 SFv-Ig for binding to CD2 antigen at least about 80% as effectively on a molar basis as CD2 SFv-Ig. Anti-CD2 monoclonal antibodies according to the present invention, as well as other antibodies that can modulate the interactions between T lymphocytes and monocytes, can be used to inhibit the production of HIV-1 by HIV-1-infected T cells in HIV-1-infected patients. In another use, T cells treated in vitro can be reinfused into AIDS patients to increase the proportion of functional, non-HIV-1-producing T cells in the patient.