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cDNA cloning of IL-1 alpha and IL-1 beta from mRNA of U937 cell line.
Clones of cDNAs encoding growth inhibitory factors for human melanoma cell line A375 were isolated from cDNA library prepared by using mRNA derived from human histiocytic lymphoma cell line U937 induced with PMA and further stimulated with LPS. Cloning was achieved using Okayama-Berg cDNA expression vector system that permits expression of the inserted cDNA segments in mammalian cells. By assaying the transfected COS-1 cells supernatants and cell extracts, we isolated two distinct cDNA clones encoding growth inhibitory factors. It was determined by the nucleotide sequences of the inserts, the cDNAs corresponded to IL-1 alpha and -1 beta. Our results indicate U937 cells can be induced to produce both interleukin-1s.
PMID: 3493774 [PubMed - indexed for MEDLINE]
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Cited by 22 PubMed Central articles
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