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您的检索式：作者名="TimJHarrison"
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| 1 | Hepatitis B virus genotypes,phylogeny and occult infection in a region with a high incidence of hepatocellular carcinoma in China显示文摘AIM: To determine the genotypes and phylogeny of hepatitis B viruses (HBVs) in asymptomatic HBV carriers, and the prevalence of occult HBV infection in Long An County, Guangxi Zhuang Autonomous Region, an area with a high incidence of hepatocellular carcinoma. METHODS. A nested polymerase chain reaction (nPCR) was used for detection of HBV DNA in serum samples from 36 blood donors with asympmatic HBV infection, and in serum samples from 52 HBsAg negative family members of the children who did not receive hepatitis B vaccination in Long An County. PCR products were sequenced, and the genotype of each HBV sequence was determined by comparison with sequences of known genotypes in the GenBank and EMBL nucleotide databases using the BLAST programme. Phylogenetic trees were constructed by the quartet maximum likelihood analysis using the TreePuzzle software. RESULTS: Twenty (55.56%) of 36 HBV asymptomatic carriers were positive for HBV DNA. They were all genotype C by comparison with sequences of known genotypes in the GenBank and EMBL nucleotide databases. The full-length HBV DNA sequence isolated from the sample No. 624 contained 3215 bases. No interesting mutations were found in this isolate. The homology analysis showed that this strain was closer to the Vietnamese HBV genotype C strain, with a homology of 97%, compared its relation to the same genotype of HBV isolated in Shanghai. Six (11.5%) of the 52 HBsAg negative family members were positive for HBV DNA. A point mutation was found in the sample No. 37, resulting in the substitution of amino acid glycine to arginine in the “a” determinant. Other samples with positive HBV DNA did not have any unusual amino acid substitutions in or around the “a” determinant, and were attributed to the wild-type HBV. CONCLUSION: The HBVs isolated from asymptomatic carriers of Long An County were all identified as genotype C, and the prevalence of occult HBV infection in the population of the county is as high as 11.5%. It is suggested that genotype C and persistent occult HBV infection may play an important role in the development of HCC in the county. | Zhong-LiaoFang HuiZhuang Xue-YanWang Xian-MinGe TimJHarrison | 2004 | World Journal of Gastroenterology2004，10，22： | 12 |
| 2 | 新型戊肝病毒ORF3和部分ORF1基因的序列分析显示文摘用RT PCR方法对 2例感染新型HEV的样品进行了检测 ,并对PCR产物进行了克隆及测序。检测结果显示用常规PCR检测易造成ORF3中GC丰富区的缺失 ,但在常规PCR反应液中加入GCmelt溶液可成功地扩增GC丰富区。序列分析显示T1和T11属于同一基因型 ,但不同于已报道的HEVI型、II型和III型 ,为一新的基因型。T1和T11与I型在该区的核苷酸同源性为 79%~ 82 % ;与II型的同源性为 80 %~ 81% ;和III型的同源性为 83%~ 85 % | 王佑春 张华远 辜文杰 RogerLing 李河民 TimJHarrison | 2001 | 中国病毒学2001，16，1： | 2 |
| 3 | 广西慢性乙型肝炎患者HBV核心基因启动子突变的研究显示文摘目的 了解HBV核心基因启动子突变与肝损害程度或HBeAg状态的关系。方法 用套式PCR扩增59例慢性乙型肝炎患者血清HBV核心基因启动子,阳性者用直接测序法检测。结果35例HBV DNA阳性,阳性率为59.3%。无正常序列标本,最常见的突变类型是nt1762、1764发生双突(A→T、G→A),占57.1%;其次为nt1799位点突变,由C→G,占54.4%,为无义突变;nt1752位点突变,由A→G,使该密码由异亮氨酸变为缬氨酸,占37.1%;nt1753T→C,占20.0%。T_(1762)A_(1764)突变株在HBeAg阳性、阴性患者组中的分布分别为31.3%、79.0%,两者差异有显著性,x^2 8.068 8,P<0.05。结论 HBV核心基因启动子突变在广两慢性乙型肝炎患者较常见,T_(1762)A_(1764)突变株与HBeAg阴性及慢性肝炎有关。 | 方钟燎 庄辉 葛宪民 杨进业 王学燕 龚健 李荣成 RogerLing TimJHarrison | 2003 | 中华肝脏病杂志2003，11，8： | 0 |
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