信号转导与转录激活因子3(signal transducer and activator of transcription 3,STAT3)存在于细胞质、细胞核、线粒体及线粒体相关内质网膜中,是参与细胞增殖、分化、迁移和免疫调节等多种生理过程的信号转导蛋白。本文概述了STAT3的...信号转导与转录激活因子3(signal transducer and activator of transcription 3,STAT3)存在于细胞质、细胞核、线粒体及线粒体相关内质网膜中,是参与细胞增殖、分化、迁移和免疫调节等多种生理过程的信号转导蛋白。本文概述了STAT3的结构、类型及进入线粒体的途径;阐述了STAT3对细胞的稳态调节,包括介导内质网Ca^(2+)转运的细胞抗凋亡作用、维持线粒体功能的作用机制和对脂质合成与分解代谢的调控机制,进一步从对造血干细胞的调控作用、骨骼肌的调节、线粒体稳态调节和对脂肪合成与代谢的调控等方面探讨了STAT3调控肉色的机制,以期为改善肉色提供理论参考。展开更多
常染色体显性遗传高免疫球蛋白E综合征(autosomal dominant hyper-IgE syndrome,AD-HIES)是一种由信号转导与转录活化因子3(signal transducer and activator of transcription-3,STAT3)突变引起的以反复严重皮肤及肺部感染、湿疹及血清...常染色体显性遗传高免疫球蛋白E综合征(autosomal dominant hyper-IgE syndrome,AD-HIES)是一种由信号转导与转录活化因子3(signal transducer and activator of transcription-3,STAT3)突变引起的以反复严重皮肤及肺部感染、湿疹及血清IgE升高为特征的先天性免疫缺陷病,每年发病率约为1/1000000^([1])。展开更多
Objective:To observe the effects of puerarin on the expressions of leptin receptor mRNA and phosphorylated Janus kinase 2 / phosphorylated signal transducers and activators of transcription 3 (P-JAK2/P-STAT3) proteins...Objective:To observe the effects of puerarin on the expressions of leptin receptor mRNA and phosphorylated Janus kinase 2 / phosphorylated signal transducers and activators of transcription 3 (P-JAK2/P-STAT3) proteins in the liver of rats with non-alcoholic fatty liver (NAFLD). Methods: A rat model of NAFLD was successfully established by feeding high-fat diet. All SD rats were randomly divided into blank control group, untreated group, simvastatin-treated group and puerarin-treated group. After four-week treatment, the levels of hepatic triglyceride and total cholesterol were analyzed by using an automatic biochemical analyzer. The pathology of the liver tissue was observed by light microscopy. Serum leptin level was detected by enzyme-linked immunosorbent assay, and the expressions of leptin receptor mRNA and P-JAK2/P-STAT3 proteins in the liver of NAFLD rats were quantified by reverse transcription polymerase chain reaction (RT-PCR) and Western blot analysis respectively. Results: Puerarin significantly decreased the levels of hepatic triglyceride and total cholesterol in NAFLD rats. Fat degeneration and inflammatory reaction in liver tissues of NAFLD rats were ameliorated after puerarin treatment. The serum leptin level was increased and the expressions of leptin receptor mRNA and P-JAK2/P-STAT3 proteins were up-regulated in puerarin-treated group. Conclusion: Puerarin can effectively attenuate liver lipid disorder and inflammation by improving the leptin resistance and enhancing the expressions of leptin receptor mRNA and P-JAK2/P-STAT3展开更多
目的:探讨运动对大鼠心肌营养因子1(cardiotrophin-1,CT-1)以及信号转导和转录激活因子3(signal transducers and activators of transcription3,STAT3)表达的影响。方法:70只雄性SD大鼠进行跑台递增负荷运动,采用Western blot测定安静...目的:探讨运动对大鼠心肌营养因子1(cardiotrophin-1,CT-1)以及信号转导和转录激活因子3(signal transducers and activators of transcription3,STAT3)表达的影响。方法:70只雄性SD大鼠进行跑台递增负荷运动,采用Western blot测定安静时和急性运动后即刻、1h、3h、5h、12h、24h心肌CT-1以及p-STAT3/STAT3的表达。结果:运动后大鼠心肌CT-1表达量升高,其中运动后3h和5h时显著高于安静组(P<0.05),运动后12小时下降到运动前水平。运动后大鼠心肌p-STAT3/STAT3蛋白表达比值升高,其中运动后5h时显著高于安静组(P<0.05),运动后12h下降到运动前水平,运动后24h显著低于安静对照组(P<0.01)。结论:运动激活CT-1/STAT3通路,这种激活可能与运动中心肌功能代谢变化和运动诱发心肌肥大的发生有关。展开更多
文摘信号转导与转录激活因子3(signal transducer and activator of transcription 3,STAT3)存在于细胞质、细胞核、线粒体及线粒体相关内质网膜中,是参与细胞增殖、分化、迁移和免疫调节等多种生理过程的信号转导蛋白。本文概述了STAT3的结构、类型及进入线粒体的途径;阐述了STAT3对细胞的稳态调节,包括介导内质网Ca^(2+)转运的细胞抗凋亡作用、维持线粒体功能的作用机制和对脂质合成与分解代谢的调控机制,进一步从对造血干细胞的调控作用、骨骼肌的调节、线粒体稳态调节和对脂肪合成与代谢的调控等方面探讨了STAT3调控肉色的机制,以期为改善肉色提供理论参考。
文摘常染色体显性遗传高免疫球蛋白E综合征(autosomal dominant hyper-IgE syndrome,AD-HIES)是一种由信号转导与转录活化因子3(signal transducer and activator of transcription-3,STAT3)突变引起的以反复严重皮肤及肺部感染、湿疹及血清IgE升高为特征的先天性免疫缺陷病,每年发病率约为1/1000000^([1])。
文摘Objective:To observe the effects of puerarin on the expressions of leptin receptor mRNA and phosphorylated Janus kinase 2 / phosphorylated signal transducers and activators of transcription 3 (P-JAK2/P-STAT3) proteins in the liver of rats with non-alcoholic fatty liver (NAFLD). Methods: A rat model of NAFLD was successfully established by feeding high-fat diet. All SD rats were randomly divided into blank control group, untreated group, simvastatin-treated group and puerarin-treated group. After four-week treatment, the levels of hepatic triglyceride and total cholesterol were analyzed by using an automatic biochemical analyzer. The pathology of the liver tissue was observed by light microscopy. Serum leptin level was detected by enzyme-linked immunosorbent assay, and the expressions of leptin receptor mRNA and P-JAK2/P-STAT3 proteins in the liver of NAFLD rats were quantified by reverse transcription polymerase chain reaction (RT-PCR) and Western blot analysis respectively. Results: Puerarin significantly decreased the levels of hepatic triglyceride and total cholesterol in NAFLD rats. Fat degeneration and inflammatory reaction in liver tissues of NAFLD rats were ameliorated after puerarin treatment. The serum leptin level was increased and the expressions of leptin receptor mRNA and P-JAK2/P-STAT3 proteins were up-regulated in puerarin-treated group. Conclusion: Puerarin can effectively attenuate liver lipid disorder and inflammation by improving the leptin resistance and enhancing the expressions of leptin receptor mRNA and P-JAK2/P-STAT3
文摘目的:探讨运动对大鼠心肌营养因子1(cardiotrophin-1,CT-1)以及信号转导和转录激活因子3(signal transducers and activators of transcription3,STAT3)表达的影响。方法:70只雄性SD大鼠进行跑台递增负荷运动,采用Western blot测定安静时和急性运动后即刻、1h、3h、5h、12h、24h心肌CT-1以及p-STAT3/STAT3的表达。结果:运动后大鼠心肌CT-1表达量升高,其中运动后3h和5h时显著高于安静组(P<0.05),运动后12小时下降到运动前水平。运动后大鼠心肌p-STAT3/STAT3蛋白表达比值升高,其中运动后5h时显著高于安静组(P<0.05),运动后12h下降到运动前水平,运动后24h显著低于安静对照组(P<0.01)。结论:运动激活CT-1/STAT3通路,这种激活可能与运动中心肌功能代谢变化和运动诱发心肌肥大的发生有关。