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首页> 外文期刊>Archives of Toxicology >A novel model of non-alcoholic steatohepatitis with fibrosis and carcinogenesis in connexin 32 dominant-negative transgenic rats
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A novel model of non-alcoholic steatohepatitis with fibrosis and carcinogenesis in connexin 32 dominant-negative transgenic rats

机译:Connexin 32显性阴性转基因大鼠纤维化和癌症具有纤维化和致癌的新型模型

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摘要

Non-alcoholic steatohepatitis (NASH) is a recognized risk factor for liver fibrosis and malignancies, and is associated with features of metabolic syndrome, such as obesity and insulin resistance (IR). We previously demonstrated that the disturbance of connexin 32 (Cx32), a gap junctional protein of hepatocytes, exacerbated NASH in Cx32 dominant-negative transgenic (Cx32 Delta Tg) rats fed methionine choline-deficient diet (MCDD). MCDD is well-established means of inducing NASH in rodents; however, the Cx32 Delta Tg-MCDD NASH model does not reproduce obesity and IR. In this study, we aimed to establish an improved NASH model. Eight-week-old male Cx32 Delta Tg and wild-type (Wt) rats received a high-fat diet (HFD) with dimethylnitrosamine (DMN) for 12 weeks. The HFD with DMN led to gains in body, liver, and visceral fat weights in both genotypes. IR was significantly greater in Cx32 Delta Tg than in Wt rats. Elevation of serum hepatic enzymes (AST, ALT), inflammatory cytokine expressions (Tnf alpha,Il-6,Tgf-beta 1,Il-1 beta,Timp2, andCol1a1), steatohepatitis, and fibrosis were significantly greater in Cx32 Delta Tg as compared with Wt rats. Regarding carcinogenesis, the number and area of glutathione S-transferase placental form (GST-P)-positive preneoplastic hepatic foci were significantly increased in Cx32 Delta Tg versus Wt rats. Moreover, activation of NF-kappa B and JNK contributed to the progression of NASH in Cx32 Delta Tg rats. These results suggest that Cx32 dysfunction promoted the progression of NASH, metabolic syndrome, and carcinogenesis. Therefore, the novel Cx32 Delta Tg-HFD-DMN NASH model may be a rapid and useful tool for evaluating the progression of NASH.
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著录项

  • 来源
    《Archives of Toxicology》 |2020年第12期|共13页
  • 作者单位

    Nagoya City Univ Grad Sch Med Sci Dept Expt Pathol &

    Tumor Biol Mizuho Ku 1 Kawasumi Mizuho Cho;

    Nagoya City Univ Grad Sch Med Sci Dept Expt Pathol &

    Tumor Biol Mizuho Ku 1 Kawasumi Mizuho Cho;

    Nagoya City Univ Grad Sch Med Sci Dept Expt Pathol &

    Tumor Biol Mizuho Ku 1 Kawasumi Mizuho Cho;

    Nagoya City Univ Grad Sch Med Sci Dept Expt Pathol &

    Tumor Biol Mizuho Ku 1 Kawasumi Mizuho Cho;

    Nagoya City Univ Grad Sch Med Sci Dept Expt Pathol &

    Tumor Biol Mizuho Ku 1 Kawasumi Mizuho Cho;

    Nagoya City Univ Grad Sch Med Sci Dept Expt Pathol &

    Tumor Biol Mizuho Ku 1 Kawasumi Mizuho Cho;

    Nagoya City Univ Grad Sch Med Sci Dept Expt Pathol &

    Tumor Biol Mizuho Ku 1 Kawasumi Mizuho Cho;

    Nagoya City Univ Grad Sch Med Sci Dept Expt Pathol &

    Tumor Biol Mizuho Ku 1 Kawasumi Mizuho Cho;

    Nagoya City Univ Grad Sch Med Sci Dept Expt Pathol &

    Tumor Biol Mizuho Ku 1 Kawasumi Mizuho Cho;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 毒物学(毒理学);
  • 关键词

    NASH; Connexin; Insulin resistance; Fibrosis; Hepatocarcinogenesis;

    机译:nash;connexin;胰岛素抵抗;纤维化;肝癌发生;

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