The mechanism involved in the inhibitory action of tranilast on collagen biosynthesis of keloid ®broblasts
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- Suzawa Haruo
- Pharmacological Laboratories, Kissei Pharmaceutical Co., Ltd.
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- Kikuchi Shinji
- Pharmacological Laboratories, Kissei Pharmaceutical Co., Ltd.
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- Arai Nobuhiko
- Pharmacological Laboratories, Kissei Pharmaceutical Co., Ltd.
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- Koda Akihide
- Department of Pharmacology, Gifu Pharmaceutical University
書誌事項
- タイトル別名
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- The Mechanism Involved in the Inhibitory Action of Tranilast on Collagen Biosynthesis of Keloid Fibroblasts.
- The mechanism involved in the inhibitory action of tranilast on collagen biosynthesis of keroid fibroblasts
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抄録
Tranilast, an anti-allergic drug inhibiting the release of substances such as histamine and prostaglandins from mast cells, was previously reported to suppress collagen synthesis of fibroblasts derived from keloid tissues. However, the inhibitory mechanism on collagen synthesis is unknown. We studied its inhibitory mechanism on collagen synthesis by culturing fibroblasts from keloid and hypertrophic scar tissues of humans. Collagen synthesis of fibroblasts from keloid and hypertrophic scar tissue is greater than that from healthy human skin. Tranilast (3-100 μM) did not inhibit prolyl hydroxylase (the rate-limiting enzyme in collagen synthesis) activity. Tranilast (3-300 μM) suppressed the collagen synthesis of fibroblasts from keloid and hypertrophic scar tissue but not healthy skin fibroblasts. Tranilast (30-300 μM) inhibited the release of transforming growth factor (TGF)-β1 from keloid fibroblasts, which enhances the collagen synthesis of keloid fibroblasts. Anti-TGF-β1 antibody (50 μl/ml) inhibited the collagen synthesis, although diphenhydramine (10 μM) and indomethacin (10 μM) did not show any inhibition. These results suggest that tranilast inhibits collagen synthesis of fibroblasts from keloid and hypertrophic scar tissue through suppressing the release of TGF-β1 from the fibroblasts themselves.
収録刊行物
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- Jpn.J.Pharmacol.
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Jpn.J.Pharmacol. 60 (2), 91-96, 1992
公益社団法人 日本薬理学会