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围产期接触双酚 A 加剧了高脂肪饮食喂养的雄性大鼠子代非酒精性脂肪性肝炎样表型。

Perinatal exposure to bisphenol A exacerbates nonalcoholic steatohepatitis-like phenotype in male rat offspring fed on a high-fat diet.

机构信息

Key Laboratory of Environment and HealthMinistry of Education and Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, ChinaKey Laboratory of Urban Environment and HealthDepartment of Environmental and Molecular Toxicology, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, ChinaDepartment of Basic Medical SciencesMedical College, Xiamen University, Xiamen 361102, China.

Key Laboratory of Environment and HealthMinistry of Education and Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, ChinaKey Laboratory of Urban Environment and HealthDepartment of Environmental and Molecular Toxicology, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, ChinaDepartment of Basic Medical SciencesMedical College, Xiamen University, Xiamen 361102, China

出版信息

J Endocrinol. 2014 Sep;222(3):313-25. doi: 10.1530/JOE-14-0356.

Abstract

Bisphenol A (BPA) is one of the environmental endocrine disrupting chemicals, which is present ubiquitously in daily life. Accumulating evidence indicates that exposure to BPA contributes to metabolic syndrome. In this study, we examined whether perinatal exposure to BPA predisposed offspring to fatty liver disease: the hepatic manifestation of metabolic syndrome. Wistar rats were exposed to 50 μg/kg per day BPA or corn oil throughout gestation and lactation by oral gavage. Offspring were fed a standard chow diet (SD) or a high-fat diet (HFD) after weaning. Effects of BPA were assessed by examination of hepatic morphology, biochemical analysis, and the hepatic expression of genes and/or proteins involved in lipogenesis, fatty acid oxidation, gluconeogenesis, insulin signaling, inflammation, and fibrosis. On a SD, the offspring of rats exposed to BPA exhibited moderate hepatic steatosis and altered expression of insulin signaling elements in the liver, but with normal liver function. On a HFD, the offspring of rats exposed to BPA showed a nonalcoholic steatohepatitis-like phenotype, characterized by extensive accumulation of lipids, large lipid droplets, profound ballooning degeneration, impaired liver function, increased inflammation, and even mild fibrosis in the liver. Perinatal exposure to BPA worsened the hepatic damage caused by the HFD in the rat offspring. The additive effects of BPA correlated with higher levels of hepatic oxidative stress. Collectively, exposure to BPA may be a new risk factor for the development of fatty liver disease and further studies should assess whether this finding is also relevant to the human population.

摘要

双酚 A(BPA)是一种环境内分泌干扰化学物质,普遍存在于日常生活中。越来越多的证据表明,接触 BPA 会导致代谢综合征。在这项研究中,我们研究了围产期暴露于 BPA 是否使后代易患脂肪肝:代谢综合征的肝脏表现。通过口服灌胃,Wistar 大鼠在整个妊娠期和哺乳期每天暴露于 50μg/kg 的 BPA 或玉米油中。断奶后,后代喂食标准饲料(SD)或高脂肪饮食(HFD)。通过检查肝脏形态、生化分析以及参与脂肪生成、脂肪酸氧化、糖异生、胰岛素信号、炎症和纤维化的基因和/或蛋白质在肝脏中的表达,评估 BPA 的作用。在 SD 上,暴露于 BPA 的大鼠后代表现出中等程度的肝脂肪变性和肝脏胰岛素信号元件的改变表达,但肝功能正常。在 HFD 上,暴露于 BPA 的大鼠后代表现出非酒精性脂肪性肝炎样表型,其特征为大量脂肪堆积、大脂质滴、严重气球样变性、肝功能受损、炎症增加,甚至肝脏出现轻度纤维化。围产期暴露于 BPA 使大鼠后代的 HFD 引起的肝损伤恶化。BPA 的附加作用与更高水平的肝脏氧化应激相关。总之,接触 BPA 可能是脂肪肝发展的一个新的危险因素,进一步的研究应评估这一发现是否与人类有关。

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