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钙信号对小鼠脂肪组织中GPR120基因转录及脂肪生成的影响

Effects of calcium signal on the transcription of GPR120 and adipogenesis in mouse adipose tissue
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摘要 【目的】探讨钙信号对小鼠脂肪组织中GPR120基因转录及脂肪生成的影响。【方法】用外源性葡萄糖酸钙和二氢吡啶钙离子通道的阻滞剂Nifedipine处理小鼠30 d,记录小鼠体质量的变化,测定小鼠皮下脂肪、附睾脂肪和肾周脂肪的沉积量,检测血清中甘油三酯(TG)、总胆固醇(TC)、高密度脂蛋白胆固醇(HDL-C)和低密度脂蛋白胆固醇(LDL-C)的浓度,同时利用Real-ti me PCR法分析GPR120基因及与脂肪生成密切相关的转录因子PPARγ、C/EBPα和脂解基因HSL、生脂基因FASmRNA的表达情况,用SPSS软件分析小鼠附睾脂肪中GPR120与脂代谢相关基因表达的相关性。【结果】葡萄糖酸钙可延缓小鼠体质量的增加,减少体脂含量(P<0.01),并使小鼠血清中的TG、TC和LDL-C浓度极显著降低(P<0.01),HDL-C浓度显著升高(P<0.05),可导致GPR120、PPARγ、C/EBPα和FAS的mRNA表达水平降低,且分别达到极显著(P<0.01)或显著(P<0.05)水平,并可使HSLmRNA表达水平极显著升高(P<0.01);Nifedipine处理能使小鼠体质量增加(P<0.05),促进体脂沉积(P<0.01),并使小鼠血清中的TG和TC浓度显著升高(分别为P<0.05和P<0.01),GPR120、PPARγ、C/EBPα和FAS的mRNA表达水平极显著升高(P<0.01),但却使HSLmRNA的表达水平极显著降低(P<0.01)。相关性分析表明,GPR120 mRNA的表达水平与PPARγ、FAS和C/EBPα间呈显著正相关。【结论】钙信号在GPR120调节小鼠脂肪生成的过程中可能起到负调控作用。 【Objective】 The present study aimed at exploring the effects of calcium signal on the transcription of GPR120 and adipogenesis in mouse adipose tissue.【Method】 Mice were treated with Calglucon and Ca2+ antagonists Nifedipine respectively for 30 days.The body weight,subcutaneous fat tissue,periepididymal fat pads and perirenal fat pads were weighed,total cholesterol(TC),triglycerides(TG),high density lipoprotein cholesterol(HDL-C),and LDL-C were measured,and the expression levels of GPR120,two major transcri...
出处 《西北农林科技大学学报(自然科学版)》 CSCD 北大核心 2010年第9期6-12,共7页 Journal of Northwest A&F University(Natural Science Edition)
基金 国家自然科学基金项目(30871785) 教育部新世纪优秀人才计划项目(NCET-06-0865)
关键词 钙信号 GPR120 转录因子 脂肪生成 calcium signal GPR120 transcriptional factor adipogenesis
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