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  • Title: Enhancement of prostaglandin E2 production by liver macrophages (Kupffer cells) after stimulation with biological response modifiers.
    Author: Kawada N, Mizoguchi Y, Kobayashi K, Monna T, Liu P, Morisawa S.
    Journal: Prostaglandins Leukot Essent Fatty Acids; 1992 Jun; 46(2):105-10. PubMed ID: 1502248.
    Abstract:
    PGE2 production by liver macrophages (Kupffer cells) activated by biological response modifiers was examined. Kupffer cells obtained from a normal rat liver possessed cyclooxygenase activity and produced TXB2, PGD2, and PGE2 from (1-14C)arachidonic acid. The major product was PGD2. When Kupffer cells were incubated in the presence of lipo-polysaccharide (LPS), OK-432, or heat-killed Propionibacterium acnes for 24 h, the amount of arachidonate cyclooxygenase products increased and the major product changed from PGD2 to PGE2. When liver macrophages including Kupffer cells were prepared from rats after an injection of LPS, OK-432, or heat-killed P. acnes, it was noticed that the number of cells obtained and PGE2 production increased compared with those of normal rat. These results suggested that PGE2 production by rat liver was induced when they were treated with biological response modifiers.
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