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| 1 | 慢性HBV感染者血清病毒动力学的检测及分析显示文摘目的:观察未抗病毒治疗的慢性乙型肝炎病毒(HBV)感染者体内病毒载量的变化及其动力学特征。方法:采用荧光定量PCR方法对未进行抗病毒治疗的3例不同临床表型的慢性HBV感染者血清HBV载量进行连续监测,同时测定每一时相点的血清ALT和总胆红素. 结果:不管是间隔1 d、1wk还是1mon,3例慢性HBV 感染者体内HBV DNA水平均存在自发波动,且与血清ALT和总胆红素变化相关性不确定. 结论:3例慢性感染者体内HBV载量的自然波动表现出一定的模式特征.我们提出—种宿主对病毒负反馈控制的PID 模式,以期对持续性病毒感染的体内生态演化作出评价和预测. | 邓国宏 王宗笠 王宇明 王开发 范燚 | 2004 | 世界华人消化杂志2004，12，4： | 3 |
| 2 | Sequence evolution of putative cytotoxic T cell epitopes in NS3 region of hepatitis C virus显示文摘AIM:Quasispecies of hepatitis C virus (HCV) are the foundation for rapid sequence evolution of HCV to evade immune surveillance of hosts. The consensus sequence evolution of a segment of HCV NS3 region, which encompasses putative cytotoxic T cell epitopes,was evaluated.METHODS:Three male patients, infected with HCV through multiple transfusions,were identified from clinical symptoms and monitored by aminotransferase for 60 months.Blood samples taken at months 0, 32, and 60 were used for viral RNA extraction. A segment of HCV NS3 region was amplified from the RNA extraction by RT-PCR and subjected to subcloning and sequencing.HLA types of these three patients were determined using complement-dependent microlymphocytotoxic assay. CTL epitopes were predicted using MHC binding motifs.RESULTS:No patient had clinical symptoms or elevation of aspartate/alanine arninotransferase. Two patients showed positive HCV PCR results at all 3 time points. The other one showed a positive HCV PCR result only at month 0.A reported HLA-A2-restricted CTL epitope had no alteration in the HLA-A2-negative carrier over 60 months.In the HLA-A2-positive individuals, all the sequences from 0 month 0 showed an amber mutation on the initial codon of the epitope. Most changes of consensus sequences in the same patient occurred on predicted cytotoxic T cell epitopes.CONCLUSION:Amber mutation and changes of consensus sequence in HCV NS3 region may be related to viral immune escape. | Hua-ZhangGuo YingYin Wen-LiangWang Chuan-ShanZhang TaoWang ZheWang JingZhang HongCheng Hai-TaoWang | 2004 | World Journal of Gastroenterology2004，10，6： | 0 |
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