The Mechanism Involved in the Inhibitory Action of Tranilast on Collagen Biosynthesis of Keloid Fibroblasts.

スポンサーリンク

概要

• 論文の詳細を見る

• 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)-β<SUB>1</SUB> from keloid fibroblasts, which enhances the collagen synthesis of keloid fibroblasts. Anti-TGF-β<SUB>1</SUB> 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-β<SUB>1</SUB> from the fibroblasts themselves.

• 公益社団法人 日本薬理学会の論文

著者

• Arai Nobuhiko

  Pharmacological Laboratories, Kissei Pharmaceutical Co., Ltd.

関連論文

• Effect of Cabergoline, a Long-Acting dopamine D_2 Agonist, on Reserpine-Treated Rodents
• The Mechanism Involved in the Inhibitory Action of Tranilast on Collagen Biosynthesis of Keloid Fibroblasts.

スポンサーリンク