title: Pioglitazone prevents early-phase hepatic fibrogenesis caused by carbon tetrachloride.
abstract: Here we investigated the effect of pioglitazone, a peroxisome proliferator-activated receptor (PPAR)-gamma ligand, on early-phase hepatic fibrogenesis in vivo caused by acute carbon tetrachloride (CCl(4)) administration in the rat. Pioglitazone (1 mg/kg BW) prevented pericentral fibrosis and induction of alpha-smooth muscle actin (SMA) 72 h after CCl(4) administration (1 ml/kg BW). CCl(4) induction of alpha1(I)procollagen mRNA in the liver was blunted by pioglitazone to the levels almost 2/3 of CCl(4) alone. Pioglitazone also prevented CCl(4)-induced hepatic inflammation and necrosis, as well as increases in serum tumor necrosis factor-alpha levels. Further, pioglitazone inhibited the induction of alphaSMA and type I collagen in primary cultured hepatic stellate cells in a dose-dependent manner. In conclusion, pioglitazone inhibits both hepatic inflammation and activation of hepatic stellate cells, thereby ameliorating early-phase fibrogenesis in the liver following acute CCl(4).
authors.affiliation: Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Kon
authors.forename: Kenichi
authors.initials: K
authors.lastname: Ikejima
authors.forename: Miyoko
authors.initials: M
authors.lastname: Hirose
authors.forename: Mutsuko
authors.initials: M
authors.lastname: Yoshikawa
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Enomoto
authors.forename: Tsuneo
authors.initials: T
authors.lastname: Kitamura
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Takei
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Sato
mesh_terms: D000199:Actins / Q000235:genetics / Q000378:metabolism; D000818:Animals; D002251:Carbon Tetrachloride; D002478:Cells, Cultured; D024042:Collagen Type I / Q000235:genetics / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D005260:Female; D005786:Gene Expression Regulation / Q000187:drug effects; D007004:Hypoglycemic Agents / Q000494:pharmacology*; D007249:Inflammation / Q000473:pathology / Q000517:prevention & control; D008099:Liver / Q000187:drug effects / Q000378:metabolism / Q000473:pathology; D008103:Liver Cirrhosis / Q000139:chemically induced* / Q000473:pathology / Q000517:prevention & control*; D009336:Necrosis; D000077205:Pioglitazone; D012333:RNA, Messenger / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar; D018160:Receptors, Cytoplasmic and Nuclear / Q000378:metabolism; D013844:Thiazoles / Q000494:pharmacology*; D045162:Thiazolidinediones; D014157:Transcription Factors / Q000378:metabolism
chemical_list: D000199:Actins; D024042:Collagen Type I; D007004:Hypoglycemic Agents; D012333:RNA, Messenger; D018160:Receptors, Cytoplasmic and Nuclear; D013844:Thiazoles; D045162:Thiazolidinediones; D014157:Transcription Factors; D002251:Carbon Tetrachloride; D000077205:Pioglitazone