Objective.In order to demonstrate the binding of HBV X protein (HBX) with the general transcription factor TFIIB. Methods.In vitro glutathion S transferase (GST) resin Pull Down assay an...Objective.In order to demonstrate the binding of HBV X protein (HBX) with the general transcription factor TFIIB. Methods.In vitro glutathion S transferase (GST) resin Pull Down assay and Far Western Blotting assay, in vivo Co immunoprecipition assay were used. Results.The X199(51 99) domain of HBX is reponsible for HBX binding to TFIIB. While the d10 domain (125 295) of TFIIB is required for TFIIB binding to HBX. When the two basic amino acids(K) at position 178 and 189 of TFIIB were substituted by neutral amino acids(L), the binding of TFIIBK178L and K189L to HBX was siginificantly reduced. When the the basic amino acids were substituted by the acidic amino acids(E),the binding of TFIIB K178E and K189E to HBX were almost lost. In vitro results of HBX binding to TFIIB were further confirmed by in vivo co immunoprecipitation assay. Our results also indicated that the Woodchuck hepatitis virus X protein (WHX) interacts with TFIIB. Conclusion.These results suggested that the communication between HBX and general transcription factor TFIIB is one of the mechanisms which account for its transcriptional transactivation.展开更多
Hepatocellular carcinoma(HCC) is the second cause cancer death in the world. HCC is frequently diagnosed at advanced stages with intrahepatic metstasis or vascular invasion and has a poor prognosis with a high mortali...Hepatocellular carcinoma(HCC) is the second cause cancer death in the world. HCC is frequently diagnosed at advanced stages with intrahepatic metstasis or vascular invasion and has a poor prognosis with a high mortality rate. In the world, hepatitis B virus(HBV) caused over 50% HCC, making it the most common carcinogen after tobacco, and the encoded protein of the HBV X gene(HBx) plays a critical role in the tumorigenesis of HBV-related HCC. There is a lot of literature about the function of HBx. In this article we summary the main function of HBx in HCC.展开更多
HBV感染作为引起慢性乙型肝炎、乙肝后肝硬化、原发性肝癌(hepatocellular carcinoma,HCC)的起始因素,已成为世界性的健康问题.据统计,目前世界上已有超过5亿人感染HBV,每年有1百万人死于乙肝相关疾病.HBx蛋白作为HBV的一个多功能调节蛋...HBV感染作为引起慢性乙型肝炎、乙肝后肝硬化、原发性肝癌(hepatocellular carcinoma,HCC)的起始因素,已成为世界性的健康问题.据统计,目前世界上已有超过5亿人感染HBV,每年有1百万人死于乙肝相关疾病.HBx蛋白作为HBV的一个多功能调节蛋白,已被证实在HCC的发生过程中起了重要作用.近年来,关于乙肝病毒X蛋白(HBV X protein,HBx)影响HBV的复制研究也有了一定的进展.同时,越来越多的HBx截短体在肝病发展过程中的作用也被重视.本文将对HBx及其截短体在HBV复制中的作用作一综述.展开更多
肝细胞癌(HCC)是世界范围内发病率非常高的恶性肿瘤之一。HBV和HCV感染是肝细胞癌发生的主要致病因素。乙型肝炎病毒x蛋白(hepatitis B virus x protein,HBx)是HBV基因组x区编码的一种多功能蛋白,在肝细胞癌发生中起重要作用。HBV抗原...肝细胞癌(HCC)是世界范围内发病率非常高的恶性肿瘤之一。HBV和HCV感染是肝细胞癌发生的主要致病因素。乙型肝炎病毒x蛋白(hepatitis B virus x protein,HBx)是HBV基因组x区编码的一种多功能蛋白,在肝细胞癌发生中起重要作用。HBV抗原表达可引起氧化应激(oxidative stress,OS)致DNA损伤(DNA damage)。研究发现DNA损伤反应的异常是肿瘤发生早期的重要机制。本文重点就HBx对DNA损伤反应的影响及这一影响作用与肝细胞癌发生关系的研究进展做一综述。展开更多
Hepatocellular carcinoma(HCC) is the sixth most common malignancy worldwide and the third most common cause of death from cancer, after lung and stomach cancer. Hepatitis B virus(HBV) infection is closely related to H...Hepatocellular carcinoma(HCC) is the sixth most common malignancy worldwide and the third most common cause of death from cancer, after lung and stomach cancer. Hepatitis B virus(HBV) infection is closely related to HCC and is a major cause of HCC. HBV is a lysogenic virus of the hepadnavirus family. Its genome presents a slack, ring-like, double-chain structure, containing four open reading frames. The X region encodes the product HBV X protein(HBx), which is a multifunctional regulatory protein that plays an important role in intracellular signal transduction, viral genome replication and transcription, cell proliferation and apoptosis, cell cycle progression, protein degradation, and genetic stability of hepatocytes. This article summarizes the recent research on the mechanism of promotion of initiation and progression of HCC by HBx protein.展开更多
应用基因芯片技术获取以稳定转染HBx基因的肝癌细胞Hep G(Hep G22-X)Y,以及非转染的肝癌细胞Hep G 2的差异表达基因,利用生物信息学方法对其进行初步分析表明,该蛋白基因编码673个氨基酸,预测分子量为17.06 k D,理论等电点为4.83,定位...应用基因芯片技术获取以稳定转染HBx基因的肝癌细胞Hep G(Hep G22-X)Y,以及非转染的肝癌细胞Hep G 2的差异表达基因,利用生物信息学方法对其进行初步分析表明,该蛋白基因编码673个氨基酸,预测分子量为17.06 k D,理论等电点为4.83,定位于细胞核,具有转录调控、生长因子、信号传导的功能,同源性分析结果表明,其碱基序列与已经报道的其他12个物种的相似率为76%-97%,且符合种属之间的进化关系。展开更多
文摘Objective.In order to demonstrate the binding of HBV X protein (HBX) with the general transcription factor TFIIB. Methods.In vitro glutathion S transferase (GST) resin Pull Down assay and Far Western Blotting assay, in vivo Co immunoprecipition assay were used. Results.The X199(51 99) domain of HBX is reponsible for HBX binding to TFIIB. While the d10 domain (125 295) of TFIIB is required for TFIIB binding to HBX. When the two basic amino acids(K) at position 178 and 189 of TFIIB were substituted by neutral amino acids(L), the binding of TFIIBK178L and K189L to HBX was siginificantly reduced. When the the basic amino acids were substituted by the acidic amino acids(E),the binding of TFIIB K178E and K189E to HBX were almost lost. In vitro results of HBX binding to TFIIB were further confirmed by in vivo co immunoprecipitation assay. Our results also indicated that the Woodchuck hepatitis virus X protein (WHX) interacts with TFIIB. Conclusion.These results suggested that the communication between HBX and general transcription factor TFIIB is one of the mechanisms which account for its transcriptional transactivation.
文摘Hepatocellular carcinoma(HCC) is the second cause cancer death in the world. HCC is frequently diagnosed at advanced stages with intrahepatic metstasis or vascular invasion and has a poor prognosis with a high mortality rate. In the world, hepatitis B virus(HBV) caused over 50% HCC, making it the most common carcinogen after tobacco, and the encoded protein of the HBV X gene(HBx) plays a critical role in the tumorigenesis of HBV-related HCC. There is a lot of literature about the function of HBx. In this article we summary the main function of HBx in HCC.
文摘HBV感染作为引起慢性乙型肝炎、乙肝后肝硬化、原发性肝癌(hepatocellular carcinoma,HCC)的起始因素,已成为世界性的健康问题.据统计,目前世界上已有超过5亿人感染HBV,每年有1百万人死于乙肝相关疾病.HBx蛋白作为HBV的一个多功能调节蛋白,已被证实在HCC的发生过程中起了重要作用.近年来,关于乙肝病毒X蛋白(HBV X protein,HBx)影响HBV的复制研究也有了一定的进展.同时,越来越多的HBx截短体在肝病发展过程中的作用也被重视.本文将对HBx及其截短体在HBV复制中的作用作一综述.
文摘肝细胞癌(HCC)是世界范围内发病率非常高的恶性肿瘤之一。HBV和HCV感染是肝细胞癌发生的主要致病因素。乙型肝炎病毒x蛋白(hepatitis B virus x protein,HBx)是HBV基因组x区编码的一种多功能蛋白,在肝细胞癌发生中起重要作用。HBV抗原表达可引起氧化应激(oxidative stress,OS)致DNA损伤(DNA damage)。研究发现DNA损伤反应的异常是肿瘤发生早期的重要机制。本文重点就HBx对DNA损伤反应的影响及这一影响作用与肝细胞癌发生关系的研究进展做一综述。
基金supported by the Program for Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region NJYT-17-B30
文摘Hepatocellular carcinoma(HCC) is the sixth most common malignancy worldwide and the third most common cause of death from cancer, after lung and stomach cancer. Hepatitis B virus(HBV) infection is closely related to HCC and is a major cause of HCC. HBV is a lysogenic virus of the hepadnavirus family. Its genome presents a slack, ring-like, double-chain structure, containing four open reading frames. The X region encodes the product HBV X protein(HBx), which is a multifunctional regulatory protein that plays an important role in intracellular signal transduction, viral genome replication and transcription, cell proliferation and apoptosis, cell cycle progression, protein degradation, and genetic stability of hepatocytes. This article summarizes the recent research on the mechanism of promotion of initiation and progression of HCC by HBx protein.
文摘应用基因芯片技术获取以稳定转染HBx基因的肝癌细胞Hep G(Hep G22-X)Y,以及非转染的肝癌细胞Hep G 2的差异表达基因,利用生物信息学方法对其进行初步分析表明,该蛋白基因编码673个氨基酸,预测分子量为17.06 k D,理论等电点为4.83,定位于细胞核,具有转录调控、生长因子、信号传导的功能,同源性分析结果表明,其碱基序列与已经报道的其他12个物种的相似率为76%-97%,且符合种属之间的进化关系。
