目的探讨系统性红斑狼疮(SLE)患者外周血单个核细胞(PBMC)中信号转导与转录激活因子2(STAT2)实时定量表达与SLE疾病特异性和病情活动度的相关性。方法收集144例SLE患者、27例非SLE患者与58名健康对照者的临床资料,取外周血抽提总...目的探讨系统性红斑狼疮(SLE)患者外周血单个核细胞(PBMC)中信号转导与转录激活因子2(STAT2)实时定量表达与SLE疾病特异性和病情活动度的相关性。方法收集144例SLE患者、27例非SLE患者与58名健康对照者的临床资料,取外周血抽提总RNA并逆转录成cDNA,运用SYBR green dyeⅠ实时定量聚合酶链反应(real—time PCR)法检测患者组和对照组的STAT2mRNA表达水平的差异,并与病情活动度进行分组比较,分析其意义。结果SLE患者组的STAT2定量表达(5.2±1.7)高于非SLE患者组和健康对照组(4.3±1.1,4.5±1.2,P均〈0.01);SLE活动组的STAT2表达(5.2±1.5)高于非活动组(4.8±2.9,P〈0.01);SLE患者组的STAT2表达与SLE疾病活动指数(SLEDAI)-2000和尿蛋白值之间呈正相关(r=0.317,0.309,P均〈0.01),与血清补体C3水平呈负相关(r=-0.449,P〈0.01)。结论转录因子STAT2在外周血细胞中的异常表达与SLE的发病机制有关,STAT2mRNA定量表达水平的升高与SLE患者病情活动相关。展开更多
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
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
目的研究miR-29a靶向信号转导及转录激活因子3(signal transduction and activator of transcription 3,STAT3)调控炎症反应在脂多糖(LPS)诱导大鼠肾小管上皮细胞损伤中的保护作用。方法培养大鼠肾小管上皮细胞株NRK-52E,LPS刺激建立脓...目的研究miR-29a靶向信号转导及转录激活因子3(signal transduction and activator of transcription 3,STAT3)调控炎症反应在脂多糖(LPS)诱导大鼠肾小管上皮细胞损伤中的保护作用。方法培养大鼠肾小管上皮细胞株NRK-52E,LPS刺激建立脓毒症细胞模型、诱导细胞损伤,转染miR-NC、miR-29a、pcDNA3.1质粒、pcDNA3.1-STAT3质粒或用STAT3抑制剂AG490处理,比较细胞活力A490、STAT3、p-STAT3、bcl-2表达量,TNF-α、IL-1β含量的差异;双荧光素酶报告基因验证miR-29a靶向STAT3。结果LPS组的miR-29a表达水平、A490水平、Bcl-2的表达水平均低于对照组,STAT3、p-STAT3的表达水平、TNF-α、IL-1β的含量均高于对照组;LPS+miR-29a组的miR-29a表达水平、A490水平、Bcl-2的表达水平均高于LPS组,STAT3、p-STAT3的表达水平、TNF-α、IL-1β的含量均低于LPS组;pcDNA3.1-STAT3+miR-29a组的A490水平及Bcl-2的表达水平均低于pcDNA3.1+miR-29a组,STAT3、p-STAT3的表达水平、TNF-α、IL-1β的含量均高于pcDNA3.1+miR-29a组;miR-29a组STAT3双荧光素酶报告基因的荧光活力低于miR-NC组。结论STAT3通路激活与LPS诱导的肾小管上皮细胞炎症反应及凋亡有关,miR-29a通过靶向STAT3减轻LPS引起的炎症反应及凋亡。展开更多
目的:检测Janus蛋白酪氨酸激酶2/信号转导和转录激活子3(Janus kinase 2/signal transducer and activator of transcription 3,JAK2/STAT3)信号转导通路在人慢性根尖周炎中的表达并推测其在慢性根尖周炎中的作用,为研究慢性根尖周病的...目的:检测Janus蛋白酪氨酸激酶2/信号转导和转录激活子3(Janus kinase 2/signal transducer and activator of transcription 3,JAK2/STAT3)信号转导通路在人慢性根尖周炎中的表达并推测其在慢性根尖周炎中的作用,为研究慢性根尖周病的致病机制提供理论基础。方法:选取健康牙齿牙周膜为对照组,患有根尖周囊肿及根尖周肉芽肿标本分别为实验组1、实验组2,每组各20例,对各组标本分别进行苏木精-伊红(hematoxylin-eosin staining,HE)染色并采用免疫组织化学法检测JAK2、磷酸化Janus蛋白酪氨酸激酶2(phosphorylation-janus kinase 2,p-JAK2)、STAT3及磷酸化信号转导和转录激活子3(phosphorylation-signal transducer and activator of transcription 3,p-STAT3)在各组中的表达。结果:JAK2、p-JAK2、STAT3、p-STAT3在正常牙周组织中均有少量表达,在根尖周囊肿及肉芽肿组织中表达量增加,实验组1、实验组2与对照组比较差异均有统计学意义(P<0.05)。实验组1与实验组2比较,JAK2及p-JAK2的表达差异有统计学意义(P<0.05),STAT3及p-STAT3的表达差异无统计学意义(P>0.05)。对根尖周炎标本中的JAK2和STAT3以及p-JAK2和p-STAT3进行相关性分析,结果显示JAK2和STAT3以及p-JAK2和p-STAT3之间有相关性。结论:JAK2、p-JAK2、STAT3及p-STAT3在慢性根尖周炎中表达量增加,推测JAK2/STAT3信号通路与根尖周炎的炎症过程有关,可能在其发展过程中有重要意义。展开更多
文摘目的探讨系统性红斑狼疮(SLE)患者外周血单个核细胞(PBMC)中信号转导与转录激活因子2(STAT2)实时定量表达与SLE疾病特异性和病情活动度的相关性。方法收集144例SLE患者、27例非SLE患者与58名健康对照者的临床资料,取外周血抽提总RNA并逆转录成cDNA,运用SYBR green dyeⅠ实时定量聚合酶链反应(real—time PCR)法检测患者组和对照组的STAT2mRNA表达水平的差异,并与病情活动度进行分组比较,分析其意义。结果SLE患者组的STAT2定量表达(5.2±1.7)高于非SLE患者组和健康对照组(4.3±1.1,4.5±1.2,P均〈0.01);SLE活动组的STAT2表达(5.2±1.5)高于非活动组(4.8±2.9,P〈0.01);SLE患者组的STAT2表达与SLE疾病活动指数(SLEDAI)-2000和尿蛋白值之间呈正相关(r=0.317,0.309,P均〈0.01),与血清补体C3水平呈负相关(r=-0.449,P〈0.01)。结论转录因子STAT2在外周血细胞中的异常表达与SLE的发病机制有关,STAT2mRNA定量表达水平的升高与SLE患者病情活动相关。
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
文摘目的研究miR-29a靶向信号转导及转录激活因子3(signal transduction and activator of transcription 3,STAT3)调控炎症反应在脂多糖(LPS)诱导大鼠肾小管上皮细胞损伤中的保护作用。方法培养大鼠肾小管上皮细胞株NRK-52E,LPS刺激建立脓毒症细胞模型、诱导细胞损伤,转染miR-NC、miR-29a、pcDNA3.1质粒、pcDNA3.1-STAT3质粒或用STAT3抑制剂AG490处理,比较细胞活力A490、STAT3、p-STAT3、bcl-2表达量,TNF-α、IL-1β含量的差异;双荧光素酶报告基因验证miR-29a靶向STAT3。结果LPS组的miR-29a表达水平、A490水平、Bcl-2的表达水平均低于对照组,STAT3、p-STAT3的表达水平、TNF-α、IL-1β的含量均高于对照组;LPS+miR-29a组的miR-29a表达水平、A490水平、Bcl-2的表达水平均高于LPS组,STAT3、p-STAT3的表达水平、TNF-α、IL-1β的含量均低于LPS组;pcDNA3.1-STAT3+miR-29a组的A490水平及Bcl-2的表达水平均低于pcDNA3.1+miR-29a组,STAT3、p-STAT3的表达水平、TNF-α、IL-1β的含量均高于pcDNA3.1+miR-29a组;miR-29a组STAT3双荧光素酶报告基因的荧光活力低于miR-NC组。结论STAT3通路激活与LPS诱导的肾小管上皮细胞炎症反应及凋亡有关,miR-29a通过靶向STAT3减轻LPS引起的炎症反应及凋亡。
文摘目的:检测Janus蛋白酪氨酸激酶2/信号转导和转录激活子3(Janus kinase 2/signal transducer and activator of transcription 3,JAK2/STAT3)信号转导通路在人慢性根尖周炎中的表达并推测其在慢性根尖周炎中的作用,为研究慢性根尖周病的致病机制提供理论基础。方法:选取健康牙齿牙周膜为对照组,患有根尖周囊肿及根尖周肉芽肿标本分别为实验组1、实验组2,每组各20例,对各组标本分别进行苏木精-伊红(hematoxylin-eosin staining,HE)染色并采用免疫组织化学法检测JAK2、磷酸化Janus蛋白酪氨酸激酶2(phosphorylation-janus kinase 2,p-JAK2)、STAT3及磷酸化信号转导和转录激活子3(phosphorylation-signal transducer and activator of transcription 3,p-STAT3)在各组中的表达。结果:JAK2、p-JAK2、STAT3、p-STAT3在正常牙周组织中均有少量表达,在根尖周囊肿及肉芽肿组织中表达量增加,实验组1、实验组2与对照组比较差异均有统计学意义(P<0.05)。实验组1与实验组2比较,JAK2及p-JAK2的表达差异有统计学意义(P<0.05),STAT3及p-STAT3的表达差异无统计学意义(P>0.05)。对根尖周炎标本中的JAK2和STAT3以及p-JAK2和p-STAT3进行相关性分析,结果显示JAK2和STAT3以及p-JAK2和p-STAT3之间有相关性。结论:JAK2、p-JAK2、STAT3及p-STAT3在慢性根尖周炎中表达量增加,推测JAK2/STAT3信号通路与根尖周炎的炎症过程有关,可能在其发展过程中有重要意义。