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A recombinant agent which is chemically identical to or similar to the endogenous protein cytokine interleukin-1 (IL-1). The IL-1 precursor is produced by monocytes, activated macrophages, and other cell types; mature IL-1 is generated by proteolytic cleavage by proteases such as IL-1-beta converting enzyme (ICE). This agent enhances T cell proliferation and B cell growth and differentiation and induces the expression of proinflammatory cytokines. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C1754\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C1754\' NCI Thesaurus)
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