title: Regulation of hyaluronate production by interleukin 1 in cultured human chorionic cells.
abstract: Human chorionic cells in culture synthesized and secreted a large amount of hyaluronate as well as tissue collagenase. When these cells were treated with human recombinant interleukin 1 alpha (hrIL-1), the biosynthesis and secretion of hyaluronate were predominantly accelerated, but those of sulfated glycosaminoglycans were not modulated. This promotive effect of hrIL-1 was not due to the increase in endogenous prostaglandins including prostaglandin E2 since cyclooxygenase inhibitors, indomethacin and diclofenac did not modulate the IL-1-mediated production of hyaluronate. On the other hand, the cotreatment of chorionic cells with hrIL-1 and cycloheximide suppressed the IL-1-mediated hyaluronate production, suggesting that protein, de novo, synthesis required for the enhancement of hyaluronate synthesis. Upon treatment with hrIL-1, the membrane bound-hyaluronate synthase activity was increased up to 5-fold in a time-dependent manner. On the other hand, when chorionic cells were treated with hrIL-1 and/or protein kinase C inhibitor, 1-(5-isoquinolinesulfonyl)-2-methyl-pyperadine hydrochloride (H7), the IL-1-mediated production of hyaluronate was effectively suppressed. Similarly, H7 effectively suppressed the protein kinase activator, 12-O-tetradecanoyl-phorbol-13-acetate-enhanced production of glycosaminoglycans with a similar extent. These results indicate that IL-1-induced acceleration of hyaluronate production was reflected on the increase in hyaluronate synthase activity, and that protein kinase C participates positively in the IL-1-signal transduction for the increased synthesis of hyaluronate in human chorionic cells.
authors.affiliation: Department of Biochemistry, Tokyo College of Pharmacy, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Ito
authors.forename: M
authors.initials: M
authors.lastname: Shimada
authors.forename: Y
authors.initials: Y
authors.lastname: Mori
mesh_terms: D002478:Cells, Cultured; D002823:Chorion / Q000166:cytology / Q000201:enzymology / Q000378:metabolism*; D014453:Glucuronosyltransferase / Q000378:metabolism; D006025:Glycosaminoglycans / Q000096:biosynthesis; D016695:Glycosyltransferases; D006801:Humans; D000076002:Hyaluronan Synthases; D006820:Hyaluronic Acid / Q000096:biosynthesis*; D007375:Interleukin-1 / Q000502:physiology*; D008565:Membrane Proteins; D011453:Prostaglandins / Q000502:physiology; D011493:Protein Kinase C / Q000037:antagonists & inhibitors / Q000378:metabolism; D011994:Recombinant Proteins / Q000494:pharmacology; D014166:Transferases; D029867:Xenopus Proteins
chemical_list: D006025:Glycosaminoglycans; D007375:Interleukin-1; D008565:Membrane Proteins; D011453:Prostaglandins; D011994:Recombinant Proteins; D029867:Xenopus Proteins; D006820:Hyaluronic Acid; D014166:Transferases; D016695:Glycosyltransferases; D014453:Glucuronosyltransferase; C056944:HAS1 protein, Xenopus; D000076002:Hyaluronan Synthases; D011493:Protein Kinase C