1,25(OH) 2 VD3 对Zucker 糖尿病肥胖大鼠肝线粒体损伤的保护作用
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(深圳市慢性病防治中心,广东深圳 518020)

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R-33


Protective effect of 1,25(OH) 2 VD3 on liver mitochondrial injury in ZDF rats
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(Shenzhen Center for Chronic Disease Control, Shenzhen 518020, China)

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    摘要:

    目的 探讨1,25(OH) 2 VD3 对Zucker 糖尿病肥胖(Zucker diabetic fatty,ZDF)大鼠肝线粒体损伤的保护作用及相关机制?方法 雄性5~6 周龄Zucker 瘦型(Zucker lean,ZL)大鼠(对照鼠)及ZDF 大鼠(模型鼠)按照体重随机分为3 组,即对照组(ZL)?模型组(ZDF)及维生素D(vitamin D,VD)干预组(ZDF + VD)?各组大鼠喂养至12 周龄后,检测肝损伤?线粒体损伤相关指标及潜在信号通路蛋白的变化?结果 与ZL 组相比,ZDF 组大鼠肝出现严重的脂质沉积,氧化损伤[活性氧簇(ROS)生成增加?丙二醛(MDA)水平明显升高,而谷胱甘肽(GSH)水平明显降低],线粒体肿胀?变性?膜电位显著下降,线粒体生物合成关键蛋白过氧化物酶体增殖物激活受体γ 辅激活因子1α(peroxisome proliferator-activated receptor γ coactivator-1α,PGC-1α)?核呼吸因子-1(nuclear respiratory factor1,NRF1)和线粒体转录因子A(mitochondrial transcription factor A,TFAM)及上游调控蛋白沉默信息调节因子2 相关酶1(sirtuin 1,SIRT1)表达均明显下降,1,25(OH) 2 VD3 干预减轻了ZDF 大鼠肝氧化损伤?线粒体损伤,上调了SIRT1?PGC-1α?NRF1 和TFAM 的水平,增强了线粒体生物合成?结论 1,25(OH) 2 VD3 可能通过SITR1/ PGC-1α介导的线粒体保护机制减轻ZDF 大鼠肝损伤?

    Abstract:

    Objective To investigate the protective effect of 1,25(OH) 2 VD3 on hepatic mitochondrial injury in ZDF rats and the potential mechanism. Methods Male Zucker rats (5 - 6 weeks old) were randomly divided into three groups according to their weight: control (ZL), model (ZDF), and 1,25(OH) 2 VD3 supplementation (ZDF + VD) groups. All rats were treated to 12 weeks of age, and then the related parameters were analyzed. Results ZDF rats treated with 1,25(OH) 2 VD3 showed a significant decrease in serum ALT/ AST and liver lipid droplet deposition. Treatment with 1,25(OH) 2 VD3 ameliorated mitochondrial injury and increased the expression of mitochondrial biogenesis-related factors SIRT1, PGC-1α, NRF1, and TFAM. Conclusions These findings suggest that 1,25(OH) 2 VD3 alleviates diabetic liver injury by improving mitochondrial biogenesis through upregulating SIRT1, PGC-1α, NRF1, and TFAM expression.

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李艳艳,冯里茹,张红敏,谭洪兴,朱李佳,王俊.1,25(OH) 2 VD3 对Zucker 糖尿病肥胖大鼠肝线粒体损伤的保护作用[J].中国比较医学杂志,2018,28(11):1~7.

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  • 收稿日期:2018-04-03
  • 在线发布日期: 2018-12-18
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