Artificial vascular graft(AVG)fistula is widely used for hemodialysis treatment in patients with renal failure.However,it has poor elasticity and compliance,leading to stenosis and thrombosis.The ideal artificial bloo...Artificial vascular graft(AVG)fistula is widely used for hemodialysis treatment in patients with renal failure.However,it has poor elasticity and compliance,leading to stenosis and thrombosis.The ideal artificial blood vessel for dialysis should replicate the structure and components of a real artery,which is primarily maintained by collagen in the extracellular matrix(ECM)of arterial cells.Studies have revealed that in hepatitis B virus(HBV)-induced liver fibrosis,hepatic stellate cells(HSCs)become hyperactive and produce excessive ECM fibers.Furthermore,mechanical stimulation can encourage ECM secretion and remodeling of a fiber structure.Based on the above factors,we transfected HSCs with the hepatitis B viral X(HBX)gene for simulating the process of HBV infection.Subsequently,these HBX-HSCs were implanted into a polycaprolactonepolyurethane(PCL-PU)bilayer scaffold in which the inner layer is dense and the outer layer consists of pores,which was mechanically stimulated to promote the secretion of collagen nanofiber from the HBX-HSCs and to facilitate crosslinking with the scaffold.We obtained an ECM-PCL-PU composite bionic blood vessel that could act as access for dialysis after decellularization.Then,the vessel scaffold was implanted into a rabbit’s neck arteriovenous fistula model.It exhibited strong tensile strength and smooth blood flow and formed autologous blood vessels in the rabbit’s body.Our study demonstrates the use of human cells to create biomimetic dialysis blood vessels,providing a novel approach for creating clinical vascular access for dialysis.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
目的探讨HBx基因通过调节miR-192的表达影响人肝癌细胞株HepG2周期进展的机制。方法流式细胞仪分析以下3组细胞的周期变化:HepG2/HBx细胞(HepG2细胞稳定转染HBx基因)、HepG2/pcDNA3.1细胞(HepG2细胞稳定转染空载体pcDNA3.1)以及HepG2细...目的探讨HBx基因通过调节miR-192的表达影响人肝癌细胞株HepG2周期进展的机制。方法流式细胞仪分析以下3组细胞的周期变化:HepG2/HBx细胞(HepG2细胞稳定转染HBx基因)、HepG2/pcDNA3.1细胞(HepG2细胞稳定转染空载体pcDNA3.1)以及HepG2细胞。3组细胞中miR-192的表达采用Taqman探针荧光定量PCR法检测。流式细胞术观察转染miR-192后HepG2细胞的周期分布变化,SYBR Green荧光定量PCR和Westernblot分别检测miR-192对HepG2细胞p53、CDKN1A mRNA和蛋白表达的影响。结果 3组细胞中,HepG2/HBx细胞G0/G1期细胞比例明显降低[(52.78±4.08)%vs(67.37±4.87)%,(65.08±5.15)%],S期和G2/M期比例明显升高[S期:(25.22±1.84)%vs(19.78±1.26)%,(18.84±1.68)%;G2/M期:(22.00±2.07)%vs(12.85±1.29)%,(16.08±1.44)%]。HepG2/HBx细胞miR-192表达显著下调[(49.1±5.9)%vs(98.0±8.9)%,(100.0±9.1)%]。转染miR-192引起HepG2细胞G0/G1期和G2/M期阻滞,同时p53、CDKN1A mRNA(p53:1.68±0.12 vs 0.90±0.06;CD-KN1A:2.36±0.12 vs 1.05±0.06)和蛋白(p53:3.07倍;CDKN1A:2.82倍)的表达水平亦显著上升。结论 miR-192通过促进p53和CDKN1A表达引起HepG2细胞周期阻滞,而HBx通过下调miR-192加速HepG2细胞周期进程。展开更多
基金supported by the National Natural Science Foundation of China(No.81770294)the Natural Science Foundation of Fujian Province(No.2023J05261),China.
文摘Artificial vascular graft(AVG)fistula is widely used for hemodialysis treatment in patients with renal failure.However,it has poor elasticity and compliance,leading to stenosis and thrombosis.The ideal artificial blood vessel for dialysis should replicate the structure and components of a real artery,which is primarily maintained by collagen in the extracellular matrix(ECM)of arterial cells.Studies have revealed that in hepatitis B virus(HBV)-induced liver fibrosis,hepatic stellate cells(HSCs)become hyperactive and produce excessive ECM fibers.Furthermore,mechanical stimulation can encourage ECM secretion and remodeling of a fiber structure.Based on the above factors,we transfected HSCs with the hepatitis B viral X(HBX)gene for simulating the process of HBV infection.Subsequently,these HBX-HSCs were implanted into a polycaprolactonepolyurethane(PCL-PU)bilayer scaffold in which the inner layer is dense and the outer layer consists of pores,which was mechanically stimulated to promote the secretion of collagen nanofiber from the HBX-HSCs and to facilitate crosslinking with the scaffold.We obtained an ECM-PCL-PU composite bionic blood vessel that could act as access for dialysis after decellularization.Then,the vessel scaffold was implanted into a rabbit’s neck arteriovenous fistula model.It exhibited strong tensile strength and smooth blood flow and formed autologous blood vessels in the rabbit’s body.Our study demonstrates the use of human cells to create biomimetic dialysis blood vessels,providing a novel approach for creating clinical vascular access for dialysis.
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.
文摘目的探讨HBx基因通过调节miR-192的表达影响人肝癌细胞株HepG2周期进展的机制。方法流式细胞仪分析以下3组细胞的周期变化:HepG2/HBx细胞(HepG2细胞稳定转染HBx基因)、HepG2/pcDNA3.1细胞(HepG2细胞稳定转染空载体pcDNA3.1)以及HepG2细胞。3组细胞中miR-192的表达采用Taqman探针荧光定量PCR法检测。流式细胞术观察转染miR-192后HepG2细胞的周期分布变化,SYBR Green荧光定量PCR和Westernblot分别检测miR-192对HepG2细胞p53、CDKN1A mRNA和蛋白表达的影响。结果 3组细胞中,HepG2/HBx细胞G0/G1期细胞比例明显降低[(52.78±4.08)%vs(67.37±4.87)%,(65.08±5.15)%],S期和G2/M期比例明显升高[S期:(25.22±1.84)%vs(19.78±1.26)%,(18.84±1.68)%;G2/M期:(22.00±2.07)%vs(12.85±1.29)%,(16.08±1.44)%]。HepG2/HBx细胞miR-192表达显著下调[(49.1±5.9)%vs(98.0±8.9)%,(100.0±9.1)%]。转染miR-192引起HepG2细胞G0/G1期和G2/M期阻滞,同时p53、CDKN1A mRNA(p53:1.68±0.12 vs 0.90±0.06;CD-KN1A:2.36±0.12 vs 1.05±0.06)和蛋白(p53:3.07倍;CDKN1A:2.82倍)的表达水平亦显著上升。结论 miR-192通过促进p53和CDKN1A表达引起HepG2细胞周期阻滞,而HBx通过下调miR-192加速HepG2细胞周期进程。
