The impacts of dexamethasone(Dex)and thyroid hormone T3 on the insulin-stimulated Srebp-1c expression were studied in primary rat hepatocytes. Primary hepatocytes from Sprague-Dawley rats were isolated, cultured and t...The impacts of dexamethasone(Dex)and thyroid hormone T3 on the insulin-stimulated Srebp-1c expression were studied in primary rat hepatocytes. Primary hepatocytes from Sprague-Dawley rats were isolated, cultured and treated with insulin in the presence or absence of the indicated reagents over time. The mRNA levels of indicated genes were determined using real-time PCR. Insulin treatment induced the Srebp-1c expression and suppressed the Pck1 expression in a time-dependent manner. Dex treatment alone reduced the Srebp-1c expression, whereas potentiated the insulin-induced its expression, which reached to a level that was higher than the insulin alone group. On the other hand, insulin treatment completely suppressed the Dex-induced Pck1 expression in the same cells. T3 treatment did not affect the expressions of Srebp-1c and Pck1 alone or in the presence of absence of insulin or Dex. Interestingly, insulin treatment induced the Rxrg m RNA expression level in the absence or presence of T0901317, a specific agonist for the liver X receptor. Dex and insulin mutually affect each other's ability to regulate the expression levels of hepatic genes involved in glucose and fatty acid metabolism. Insulin induced Rxrg expression in primary hepatocytes, which may contribute to the induction of Srebp-1c expression in the same cells.展开更多
目的:探讨固醇调节元件结合蛋白-1c基因18号外显子54G/C基因多态性与新疆地区汉族人群心肌梗死的相关性。方法:采用聚合酶链反应-限制性片段长度多态性方法,对230例急性心肌梗死患者和212例健康受试者SREBP-1c基因18号外显子54G/C位点...目的:探讨固醇调节元件结合蛋白-1c基因18号外显子54G/C基因多态性与新疆地区汉族人群心肌梗死的相关性。方法:采用聚合酶链反应-限制性片段长度多态性方法,对230例急性心肌梗死患者和212例健康受试者SREBP-1c基因18号外显子54G/C位点进行分析,同时进行血糖及血脂水平检测。数据处理利用PEMS for windows 3.1软件包完成,用Hardy-Weinberg平衡检验样本的群体代表性,各组基因型和等位基因频率差异比较用x^2检验,连续变量的比较用t检验。结果:SREBP-1c基因18号外显子54G/C在病例组和健康对照组中基因型频率分别为:CC型13.04%和4.25%,CG型34.78%和36.32%,GG52.17%和59.43%,两组CC基因型差异具有统计学意义(P<0.05),且病例组C等位基因频率高于对照组(P<0.05),而GC和GG基因型差异无统计学意义(P<0.05)。不同基因型间血糖、血脂水平差异具有统计学意义(P<0.05)。结论:CC基因型和等位基因C可能增加急性心肌梗死发生的风险,并可影响病人的血糖、甘油三酯代谢。展开更多
基金the Scientific Research Project of Wuhan Municipal Health Commission for research support to Y. Zhang (WX19Y09)。
文摘The impacts of dexamethasone(Dex)and thyroid hormone T3 on the insulin-stimulated Srebp-1c expression were studied in primary rat hepatocytes. Primary hepatocytes from Sprague-Dawley rats were isolated, cultured and treated with insulin in the presence or absence of the indicated reagents over time. The mRNA levels of indicated genes were determined using real-time PCR. Insulin treatment induced the Srebp-1c expression and suppressed the Pck1 expression in a time-dependent manner. Dex treatment alone reduced the Srebp-1c expression, whereas potentiated the insulin-induced its expression, which reached to a level that was higher than the insulin alone group. On the other hand, insulin treatment completely suppressed the Dex-induced Pck1 expression in the same cells. T3 treatment did not affect the expressions of Srebp-1c and Pck1 alone or in the presence of absence of insulin or Dex. Interestingly, insulin treatment induced the Rxrg m RNA expression level in the absence or presence of T0901317, a specific agonist for the liver X receptor. Dex and insulin mutually affect each other's ability to regulate the expression levels of hepatic genes involved in glucose and fatty acid metabolism. Insulin induced Rxrg expression in primary hepatocytes, which may contribute to the induction of Srebp-1c expression in the same cells.
文摘目的:探讨固醇调节元件结合蛋白-1c基因18号外显子54G/C基因多态性与新疆地区汉族人群心肌梗死的相关性。方法:采用聚合酶链反应-限制性片段长度多态性方法,对230例急性心肌梗死患者和212例健康受试者SREBP-1c基因18号外显子54G/C位点进行分析,同时进行血糖及血脂水平检测。数据处理利用PEMS for windows 3.1软件包完成,用Hardy-Weinberg平衡检验样本的群体代表性,各组基因型和等位基因频率差异比较用x^2检验,连续变量的比较用t检验。结果:SREBP-1c基因18号外显子54G/C在病例组和健康对照组中基因型频率分别为:CC型13.04%和4.25%,CG型34.78%和36.32%,GG52.17%和59.43%,两组CC基因型差异具有统计学意义(P<0.05),且病例组C等位基因频率高于对照组(P<0.05),而GC和GG基因型差异无统计学意义(P<0.05)。不同基因型间血糖、血脂水平差异具有统计学意义(P<0.05)。结论:CC基因型和等位基因C可能增加急性心肌梗死发生的风险,并可影响病人的血糖、甘油三酯代谢。
