Feasible and effective cell models for hepatitis B virus(HBV) infection are required for investigating the complete lifecycle of this virus, including the early steps of viral entry. Resistance to dimethyl sulfoxide/p...Feasible and effective cell models for hepatitis B virus(HBV) infection are required for investigating the complete lifecycle of this virus, including the early steps of viral entry. Resistance to dimethyl sulfoxide/polyethylene glycol(DMSO/PEG), h NTCP expression, and a differentiated state are the limiting factors for successful HBV infection models. In the present study, we used a hepatoma cell line(Hu7^(hDNTCPh)) to overcome these limiting factors so that it exhibits excellent susceptibility to HBV infection. To achieve this goal, different hepatoma cell lines were tested with 2.5% DMSO/4%PEG8000, and one resistant cell line(Huh7 D) was used to construct a stable h NTCP-expressing cell line(Hu7^(hDNTCPh)) using a recombinant lentivirus system. Then, the morphological characteristics and differentiation molecular markers of Hu7^(hDNTCPh) cells with or without DMSO treatment were characterized. Finally, the susceptibility of Hu7^(hDNTCPh) cells to HBV infection was assessed. Our results showed that Huh7 D cells were resistant to 2.5% DMSO/4% PEG8000, whereas the others were not. Hu7^(hDNTCPh) cells were established to express a high level of h NTCP compared to liver extracts, and Hu7^(hDNTCPh) cells rapidly transformed into a non-dividing, well-differentiated polarized phenotype under DMSO treatment. Hu7^(hDNTCPh) cells fully supported the entire lifecycle of HBV infection. This cell culture system will be useful for the analysis of host-virus interactions, which should facilitate the discovery of antiviral drugs and vaccines.展开更多
目的通过考察茵栀黄颗粒(茵陈、栀子、金银花和黄芩)对肝细胞膜转运体多药耐药相关蛋白2(Multidrugresistance-associated protein 2,Mrp2/ABCC2)、Na+-牛黄胆酸共转运多肽(Na+/taurocholate cotransporter,Ntcp/SLC10A1)及胆盐输出泵(B...目的通过考察茵栀黄颗粒(茵陈、栀子、金银花和黄芩)对肝细胞膜转运体多药耐药相关蛋白2(Multidrugresistance-associated protein 2,Mrp2/ABCC2)、Na+-牛黄胆酸共转运多肽(Na+/taurocholate cotransporter,Ntcp/SLC10A1)及胆盐输出泵(Bile salt export pump,Bsep/ABCB11)表达的影响。方法胆管结扎术制备胆汁淤积大鼠模型;生化检测和HE染色,观察茵栀黄颗粒的干预效果;流式细胞仪测定肝脏转运体Ntcp、Bsep和Mrp2的表达。结果与模型组相比,茵栀黄组肝细胞的脂肪病变和水肿较模型组显著减轻(P<0.05),Mrp2的表达显著升高(P<0.01);但Ntcp、Bsep的表达无明显变化。结论肝细胞膜转运体Mrp2的表达升高可能是茵栀黄颗粒的退黄利胆分子机制之一。展开更多
钠离子牛磺胆酸共转运多肽(Na+-taurocholate cotransporting polypeptide,NTCP)是乙型肝炎病毒(hepatitis B virus,HBV)感染的受体,此发现为抗HBV新药研发提供了新靶标。本文综合了近3年来对NTCP受体的研究,全面阐述了目前HBV治疗中的...钠离子牛磺胆酸共转运多肽(Na+-taurocholate cotransporting polypeptide,NTCP)是乙型肝炎病毒(hepatitis B virus,HBV)感染的受体,此发现为抗HBV新药研发提供了新靶标。本文综合了近3年来对NTCP受体的研究,全面阐述了目前HBV治疗中的瓶颈、NTCP发现的意义及其表达调节,以及进入抑制剂的种类、作用机制和研究进展。进入抑制剂将成为抗HBV感染的新靶点,并有可能成为抗HBV感染的新的策略之一。展开更多
目的:本研究以牛磺胆酸钠转运蛋白(Na+/taurocholate cotransporting polypeptide,Ntcp)为研究对象,通过分析Ntcp在高脂血症大鼠模型肝脏中的表达状况,寻求新的高脂血症治疗措施.方法:取♂Wistar大鼠(体质量150 g±5 g)60只,随机均...目的:本研究以牛磺胆酸钠转运蛋白(Na+/taurocholate cotransporting polypeptide,Ntcp)为研究对象,通过分析Ntcp在高脂血症大鼠模型肝脏中的表达状况,寻求新的高脂血症治疗措施.方法:取♂Wistar大鼠(体质量150 g±5 g)60只,随机均分为实验组及对照组.喂食90 d,建立高脂血症模型,喂食期间定期取血检测胆固醇及胆汁酸含量,建模成功后,分别取两组大鼠肝脏组织.应用逆转录-聚合酶链反应(RT-polymerase chain reaction,RTP C R)技术检测肝脏组织的N t c p基因表达的状况.应用免疫组织化学SP(streptavidinperosidase)法检测肝脏组织的Ntcp蛋白表达的状况.结果:实验组胆固醇及胆汁酸含量提高明显.电泳结果显示:两组肝脏组织都出现了位于425 bp的内参β-actin基因的扩增带和位于325 bp的Ntcp基因扩增带,实验组Ntcp基因扩增带亮度减弱;免疫组织化学结果显示:实验组Ntcp表达阳性率为23.6%,对照组N t c p表达阳性率为75.2%,差异有统计学意义(χ2=9.858,P<0.05).结论:实验组大鼠的Ntcp基因的表达明显减弱,提示我们Ntcp基因可能会成为高脂血症及其相关疾病新的药物治疗靶点.展开更多
基金supported by the National Natural Science Foundation of China (Grant number: 81601760, 31621061 and 81461130019)General Financial Grant from the China Postdoctoral Science Foundation (Grant number: 2016M602587)+1 种基金the Shenzhen Foundation of Science and Technology (Grant number: JCYJ20160425 104534335)supported by the Youth Innovation Promotion Association CAS (No.201603)
文摘Feasible and effective cell models for hepatitis B virus(HBV) infection are required for investigating the complete lifecycle of this virus, including the early steps of viral entry. Resistance to dimethyl sulfoxide/polyethylene glycol(DMSO/PEG), h NTCP expression, and a differentiated state are the limiting factors for successful HBV infection models. In the present study, we used a hepatoma cell line(Hu7^(hDNTCPh)) to overcome these limiting factors so that it exhibits excellent susceptibility to HBV infection. To achieve this goal, different hepatoma cell lines were tested with 2.5% DMSO/4%PEG8000, and one resistant cell line(Huh7 D) was used to construct a stable h NTCP-expressing cell line(Hu7^(hDNTCPh)) using a recombinant lentivirus system. Then, the morphological characteristics and differentiation molecular markers of Hu7^(hDNTCPh) cells with or without DMSO treatment were characterized. Finally, the susceptibility of Hu7^(hDNTCPh) cells to HBV infection was assessed. Our results showed that Huh7 D cells were resistant to 2.5% DMSO/4% PEG8000, whereas the others were not. Hu7^(hDNTCPh) cells were established to express a high level of h NTCP compared to liver extracts, and Hu7^(hDNTCPh) cells rapidly transformed into a non-dividing, well-differentiated polarized phenotype under DMSO treatment. Hu7^(hDNTCPh) cells fully supported the entire lifecycle of HBV infection. This cell culture system will be useful for the analysis of host-virus interactions, which should facilitate the discovery of antiviral drugs and vaccines.
文摘目的通过考察茵栀黄颗粒(茵陈、栀子、金银花和黄芩)对肝细胞膜转运体多药耐药相关蛋白2(Multidrugresistance-associated protein 2,Mrp2/ABCC2)、Na+-牛黄胆酸共转运多肽(Na+/taurocholate cotransporter,Ntcp/SLC10A1)及胆盐输出泵(Bile salt export pump,Bsep/ABCB11)表达的影响。方法胆管结扎术制备胆汁淤积大鼠模型;生化检测和HE染色,观察茵栀黄颗粒的干预效果;流式细胞仪测定肝脏转运体Ntcp、Bsep和Mrp2的表达。结果与模型组相比,茵栀黄组肝细胞的脂肪病变和水肿较模型组显著减轻(P<0.05),Mrp2的表达显著升高(P<0.01);但Ntcp、Bsep的表达无明显变化。结论肝细胞膜转运体Mrp2的表达升高可能是茵栀黄颗粒的退黄利胆分子机制之一。
文摘钠离子牛磺胆酸共转运多肽(Na+-taurocholate cotransporting polypeptide,NTCP)是乙型肝炎病毒(hepatitis B virus,HBV)感染的受体,此发现为抗HBV新药研发提供了新靶标。本文综合了近3年来对NTCP受体的研究,全面阐述了目前HBV治疗中的瓶颈、NTCP发现的意义及其表达调节,以及进入抑制剂的种类、作用机制和研究进展。进入抑制剂将成为抗HBV感染的新靶点,并有可能成为抗HBV感染的新的策略之一。
文摘目的:本研究以牛磺胆酸钠转运蛋白(Na+/taurocholate cotransporting polypeptide,Ntcp)为研究对象,通过分析Ntcp在高脂血症大鼠模型肝脏中的表达状况,寻求新的高脂血症治疗措施.方法:取♂Wistar大鼠(体质量150 g±5 g)60只,随机均分为实验组及对照组.喂食90 d,建立高脂血症模型,喂食期间定期取血检测胆固醇及胆汁酸含量,建模成功后,分别取两组大鼠肝脏组织.应用逆转录-聚合酶链反应(RT-polymerase chain reaction,RTP C R)技术检测肝脏组织的N t c p基因表达的状况.应用免疫组织化学SP(streptavidinperosidase)法检测肝脏组织的Ntcp蛋白表达的状况.结果:实验组胆固醇及胆汁酸含量提高明显.电泳结果显示:两组肝脏组织都出现了位于425 bp的内参β-actin基因的扩增带和位于325 bp的Ntcp基因扩增带,实验组Ntcp基因扩增带亮度减弱;免疫组织化学结果显示:实验组Ntcp表达阳性率为23.6%,对照组N t c p表达阳性率为75.2%,差异有统计学意义(χ2=9.858,P<0.05).结论:实验组大鼠的Ntcp基因的表达明显减弱,提示我们Ntcp基因可能会成为高脂血症及其相关疾病新的药物治疗靶点.
