Abstract: An inflammatory cytokine is disclosed which has been isolated from cells that have been incubated with a stimulator material. The inflammatory cytokine comprises a protein that is capable of binding to heparin, inducing localized inflammation characterized by polymorphonuclear cell infiltration when administered subcutaneously and having potent in vitro chemotactic activity while inducing little or no in vitro chemokinesis in polymorphonuclear cells, while lacking the ability to suppress the activity of the anabolic enzyme lipoprotein lipase, cause the cytotoxicity of cachectin/TNF-sensitive cells, stimulate the blastogenesis of endotoxin-resistant C3H/HeJ thymocytes, or induce the production of cachectin/TNF by primary thioglycollate-elicited mouse macrophage cells. A particular inflammatory cytokine has been isolated and its cDNA has been sequenced. The sequence predicts a protein cDNA of 73 amino acids in length and a molecular weight of 7,851.

Abstract: The present invention pertains to the novel hybridoma SDW18.1.1, hybridomas obtained from SDW18.1.1, monoclonal antibodies obtained from such hybridomas and derivatives of such monoclonal antibodies. The novel hybridomas are formed by fusion of cells from a mouse myeloma line and spleen cells from a mouse previously immunized with cachectin/TNF. Diagnostic and therapeutic utilities for the monoclonal antibodies and their derivatives are proposed, and testing procedures, materials in kit form and pharmaceutical compositions are likewise set forth.

Abstract: The present invention pertains to the novel hybridoma SDW18.1.1, hybridomas obtained from SDW18.1.1, monoclonal antibodies obtained from such hybridomas and derivatives of such monoclonal antibodies. The novel hybridomas are formed by fusion of cells from a mouse myeloma line and spleen cells from a mouse previously immunized with cachectin/TNF. Diagnostic and therapeutic utilities for the monoclonal antibodies and their derivatives are proposed, and testing procedures, materials in kit form and pharmaceutical compositions are likewise set forth.

Abstract: The present invention relates to the identification of promoters of myelopoietic blood cell production. In particular, an agent has been discovered that enhances myelopoietic colony stimulating factor activity. The agent comprises cytokines that are also capable of binding to heparin, and inducing localized inflammation characterized by polymorphonuclear cell infiltration when administered subcutaneously. Particular agents comprise the inflammatory cytokines MIP-1 and MIP-2. Diagnostic and therapeutic utilities are proposed, and pharmaceutical compositions are likewise set forth.

Abstract: An inflammatory cytokine is disclosed which has been isolated from cells that have been incubated with a stimulator material. The inflammatory cytokine comprises a protein that is capable of binding to heparin, inducing localized inflammation characterized by polymorphonuclear cell infiltration when administered subcutaneously and inducing in vitro polymorphonuclear cell chemokinesis, while lacking the ability to suppress the activity of the anabolic enzyme lipoprotein lipase, cause the cytotoxicity of cachectin/TNF-sensitive cells, stimulate the blastogenesis of endotoxin-resistant C3H/HeJ thymocytes, or induce the production of cachectin/TNF by primary thioglycollate-elicited mouse macrophage cells. A particular inflammatory cytokine MIP-1 has been isolated and has been found to comprise a peptide doublet of similar molecular weights of about 8,000 daltons, and to show a pI of about 4.6. The doublet has been resolved into its component peptides, MIP-1.alpha. and MIP-1.beta.