目的探讨心脏组织特异性过表达受体相互作用蛋白140(receptor interacting protein 140,RIP140)对心脏功能及炎症通路的影响。方法大鼠心脏组织多点注射携带RIP140基因的腺病毒载体,使心肌组织过表达RIP140;免疫荧光验证RIP140蛋白在心...目的探讨心脏组织特异性过表达受体相互作用蛋白140(receptor interacting protein 140,RIP140)对心脏功能及炎症通路的影响。方法大鼠心脏组织多点注射携带RIP140基因的腺病毒载体,使心肌组织过表达RIP140;免疫荧光验证RIP140蛋白在心脏组织中的过表达情况;超声心动图与血流动力学参数评估心脏功能;ELISA分析TNF-α、IL-2、IL-1β等炎症因子水平;Western blot分析p65、IκB-α的蛋白水平。结果腺病毒载体介导的外源基因RIP140可成功过表达于心脏组织,诱导心室扩张、左室射血分数下降、心功能受损,促进心肌组织TNF-α、IL-2、IL-1β炎症因子释放,p65蛋白入核、胞质IκB-α蛋白降解。结论腺病毒介导RIP140基因在心脏组织中的特异性过表达损伤心脏功能,激活NF-κB/p65炎症通路,促进炎症因子释放。展开更多
Estrogen receptors and E2F transcription factors are the key players of two nuclear signaling pathways which exert a major role in oncogenesis, particularly in the mammary gland. Different levels of dialogue between t...Estrogen receptors and E2F transcription factors are the key players of two nuclear signaling pathways which exert a major role in oncogenesis, particularly in the mammary gland. Different levels of dialogue between these two pathways have been deciphered and deregulation of the E2F pathway has been shown to impact the response of breast cancer cells to endocrine therapies. The present review focuses on the transcriptional coregulator RIP140/NRIP1 which is involved in several regulatory feed-back loops and inhibitory cross-talks between different nuclear signaling pathways. RIP140 regulates the transactivation potential of estrogen receptors and E2Fs and is also a direct transcriptional target of these transcription factors. Published data highlight the complex regulation of RIP140 expression at the transcriptional level and its potential role in transcription cross-talks. Indeed, a subtle regulation of RIP140 expression levels has important consequences on other transcription networks targeted by this coregulator. Another level of regulation implies titration mechanisms by which activation of a pathway leads to sequestration of the RIP140 protein and thus impinges other gene regulatory circuitries. Altogether, RIP140 occupies a place of choice in the dialogue between nuclear receptors and E2Fs, which could be highly relevant in various human pathologies such as cancer or metabolic diseases.展开更多
受体相互作用蛋白140(receptor-interacting protein 140,RIP140)作为一种转录辅抑制因子,参与机体代谢调节。RIP140与核受体结合后能够负向调节脂肪、肌肉、心肌以及肝脏等多种组织中靶基因的转录。对其进行靶向沉默可上调多种组织中...受体相互作用蛋白140(receptor-interacting protein 140,RIP140)作为一种转录辅抑制因子,参与机体代谢调节。RIP140与核受体结合后能够负向调节脂肪、肌肉、心肌以及肝脏等多种组织中靶基因的转录。对其进行靶向沉默可上调多种组织中相关基因的表达,影响糖酵解、甘油三酯代谢、三羧酸循环、脂肪酸β氧化、炎症因子表达以及机体时钟变化等多种代谢过程,因此RIP140有望成为治疗代谢综合征的候选靶点。展开更多
Aim:The transcription factor RIP140(receptor interacting protein of 140 kDa)is involved in intestinal tumorigenesis.It plays a role in the control of microsatellite instability(MSI),through the regulation of MSH2 and ...Aim:The transcription factor RIP140(receptor interacting protein of 140 kDa)is involved in intestinal tumorigenesis.It plays a role in the control of microsatellite instability(MSI),through the regulation of MSH2 and MSH6 gene expression.The aim of this study was to explore its effect on the expression of POLK,the gene encoding the specialized translesion synthesis(TLS)DNA polymeraseκknown to perform accurate DNA synthesis at microsatellites.Methods:Different mouse models and engineered human colorectal cancer(CRC)cell lines were used to analyze by RT-qPCR,while Western blotting and luciferase assays were used to elucidate the role of RIP140 on POLK gene expression.Published DNA microarray datasets were reanalyzed.The in vitro sensitivity of CRC cells to methyl methane sulfonate and cisplatin was determined.Results:RIP140 positively regulates,at the transcriptional level,the expression of the POLK gene,and this effect involves,at least partly,the p53 tumor suppressor.In different cohorts of CRC biopsies(with or without MSI),a strong positive correlation was observed between RIP140 and POLK gene expression.In connection with its effect on POLK levels and the TLS function of this polymerase,the cellular response to methyl methane sulfonate was increased in cells lacking the Rip140 gene.Finally,the association of RIP140 expression with better overall survival of CRC patients was observed only when the corresponding tumors exhibited low levels of POLK,thus strengthening the functional link between the two genes in human CRC.Conclusion:The regulation of POLK gene expression by RIP140 could thus contribute to the maintenance of microsatellite stability,and more generally to the control of genome integrity.展开更多
Objective To investigate the protective effect of Pioglitazone,a kind of peroxisome proliferators activated receptor(PPAR-γ)agonist,on the glucolipotoxicity-induced injury ofβcells,and also evaluate the role of rece...Objective To investigate the protective effect of Pioglitazone,a kind of peroxisome proliferators activated receptor(PPAR-γ)agonist,on the glucolipotoxicity-induced injury ofβcells,and also evaluate the role of receptor interaction protein 140(RIP140)in this process.Methods MIN6 cells were divided into three groups:展开更多
文摘目的探讨心脏组织特异性过表达受体相互作用蛋白140(receptor interacting protein 140,RIP140)对心脏功能及炎症通路的影响。方法大鼠心脏组织多点注射携带RIP140基因的腺病毒载体,使心肌组织过表达RIP140;免疫荧光验证RIP140蛋白在心脏组织中的过表达情况;超声心动图与血流动力学参数评估心脏功能;ELISA分析TNF-α、IL-2、IL-1β等炎症因子水平;Western blot分析p65、IκB-α的蛋白水平。结果腺病毒载体介导的外源基因RIP140可成功过表达于心脏组织,诱导心室扩张、左室射血分数下降、心功能受损,促进心肌组织TNF-α、IL-2、IL-1β炎症因子释放,p65蛋白入核、胞质IκB-α蛋白降解。结论腺病毒介导RIP140基因在心脏组织中的特异性过表达损伤心脏功能,激活NF-κB/p65炎症通路,促进炎症因子释放。
文摘Estrogen receptors and E2F transcription factors are the key players of two nuclear signaling pathways which exert a major role in oncogenesis, particularly in the mammary gland. Different levels of dialogue between these two pathways have been deciphered and deregulation of the E2F pathway has been shown to impact the response of breast cancer cells to endocrine therapies. The present review focuses on the transcriptional coregulator RIP140/NRIP1 which is involved in several regulatory feed-back loops and inhibitory cross-talks between different nuclear signaling pathways. RIP140 regulates the transactivation potential of estrogen receptors and E2Fs and is also a direct transcriptional target of these transcription factors. Published data highlight the complex regulation of RIP140 expression at the transcriptional level and its potential role in transcription cross-talks. Indeed, a subtle regulation of RIP140 expression levels has important consequences on other transcription networks targeted by this coregulator. Another level of regulation implies titration mechanisms by which activation of a pathway leads to sequestration of the RIP140 protein and thus impinges other gene regulatory circuitries. Altogether, RIP140 occupies a place of choice in the dialogue between nuclear receptors and E2Fs, which could be highly relevant in various human pathologies such as cancer or metabolic diseases.
文摘受体相互作用蛋白140(receptor-interacting protein 140,RIP140)作为一种转录辅抑制因子,参与机体代谢调节。RIP140与核受体结合后能够负向调节脂肪、肌肉、心肌以及肝脏等多种组织中靶基因的转录。对其进行靶向沉默可上调多种组织中相关基因的表达,影响糖酵解、甘油三酯代谢、三羧酸循环、脂肪酸β氧化、炎症因子表达以及机体时钟变化等多种代谢过程,因此RIP140有望成为治疗代谢综合征的候选靶点。
文摘Aim:The transcription factor RIP140(receptor interacting protein of 140 kDa)is involved in intestinal tumorigenesis.It plays a role in the control of microsatellite instability(MSI),through the regulation of MSH2 and MSH6 gene expression.The aim of this study was to explore its effect on the expression of POLK,the gene encoding the specialized translesion synthesis(TLS)DNA polymeraseκknown to perform accurate DNA synthesis at microsatellites.Methods:Different mouse models and engineered human colorectal cancer(CRC)cell lines were used to analyze by RT-qPCR,while Western blotting and luciferase assays were used to elucidate the role of RIP140 on POLK gene expression.Published DNA microarray datasets were reanalyzed.The in vitro sensitivity of CRC cells to methyl methane sulfonate and cisplatin was determined.Results:RIP140 positively regulates,at the transcriptional level,the expression of the POLK gene,and this effect involves,at least partly,the p53 tumor suppressor.In different cohorts of CRC biopsies(with or without MSI),a strong positive correlation was observed between RIP140 and POLK gene expression.In connection with its effect on POLK levels and the TLS function of this polymerase,the cellular response to methyl methane sulfonate was increased in cells lacking the Rip140 gene.Finally,the association of RIP140 expression with better overall survival of CRC patients was observed only when the corresponding tumors exhibited low levels of POLK,thus strengthening the functional link between the two genes in human CRC.Conclusion:The regulation of POLK gene expression by RIP140 could thus contribute to the maintenance of microsatellite stability,and more generally to the control of genome integrity.
文摘Objective To investigate the protective effect of Pioglitazone,a kind of peroxisome proliferators activated receptor(PPAR-γ)agonist,on the glucolipotoxicity-induced injury ofβcells,and also evaluate the role of receptor interaction protein 140(RIP140)in this process.Methods MIN6 cells were divided into three groups:
