1.Distribution of hepatitis B virus genotypes and subgenotypes among chronically infected patients in Xinjiang Uighur..
Xiao-Feng SUN ; Shu-Juan WEN ; Hui LI ; Jin-Lin HOU ; Yue-Xin ZHANG ; Zhan-Hui WANG ; Yu-Jian ZHENG
Chinese Journal of Hepatology 2009;17(2):88-90
<b>OBJECTIVEb>To investigate the distribution of Hepatitis B virus genotypes and subgenotypes among patients with chronic hepatitis B in Xinjiang Uighur.
<b>METHODSb>The HBV genotypes and subgenotypes were analyzed by PCR-restriction fragment length polymorphism in 109 patients with chronic hepatitis B.
<b>RESULTSb>Two HBV genotypes, genotype C (45.9%) and genotype C/D (29.4%) were prevalent, genotype B (8.3%) and genotype D (16.5%) were also found in Xinjiang Uighur. Genotype C had two subgenotypes, C1 (54%) and C2 (46%). Genotype B had only one subgenotype, i.e. Ba. The subgenotype C2 was associated with cirrhosis and hepatocellular carcinoma.
<b>CONCLUSIONb>In Uygurs, the most common HBV genotypes were C and C/D, and the subgenotype C2 was associated with cirrhosis and hepatocellular carcinoma.
Carcinoma, Hepatocellular ; virology ; Genotype ; Hepatitis B virus ; genetics ; Hepatitis B, Chronic ; virology ; Humans ; Liver Neoplasms ; virology
2.Distribution and clinical significance of hepatitis B virus (HBV) genotypes and subtypes in HBV-infected patients.
Ya-juan LI ; Hui ZHUANG ; Jie LI ; Qing-ming DONG ; Ya-jie CHEN ; Jun-qi NIU ; Wei-min MA ; Wei ZHAO ; Bao-an ZHAO ; Jin-qun ZHONG
Chinese Journal of Hepatology 2005;13(10):724-729
<b>OBJECTIVEb>To study hepatitis B virus (HBV) genotype and subtype distribution and its clinical significance in HBV-infected patients.
<b>METHODSb>We used type/subtype-specific primers and PCR to detect HBV genotype and subtype of 445 HBV-infected patients from Beijing, Changchun, Hanchuan Shenzhen, Qingyuan and Nanjing, including 7 acute hepatitis (AH), 36 asymptomatic HBV carriers (ASC), 352 chronic hepatitis (CH), 28 liver cirrhosis (LC), and 22 hepatocellular carcinoma (HCC) cases. Genotyping results were confirmed by PCR product sequencing.
<b>RESULTSb>Among 445 HBV-infected patients, the proportions of genotype B, C, and B/C were 32.6% (145/445), 53.7% (239/445), and 13.7% (61/445), respectively. In genotype C, 13 (5.4%) were subtype C1, 135 (56.5%) were subtype C2, and the remaining 91 (38.1%) were neither C1 nor C2. In genotype B, 100 (69.0%) were subtype Ba, 25 (17.2%) subtype Bj, and the other 20 (13.8%) were neither Ba nor Bj. In genotype B/C, 15 (24.6%) were Ba/C2, 8 (13.1%) Bj/C2, 6 (9.8%) Ba/C1, 3 (4.9%) Bj/C1, 11 (18.0%) Ba/neither C1 nor C2, 7 (11.5%) Bj/neither C1 nor C2, and 6 (9.8%) neither Ba nor Bj/neither C1 nor C2, 2 (3.3%) neither Ba nor Bj/C1, 3 (4.9%) neither Ba nor Bj/C2. The HBV genotype and subtype distribution we found exhibited significant differences in the various clinical types of HBV infection tested, and showed that genotype C was predominant among patients with liver cirrhosis (78.6%) and hepatocellular carcinoma (86.4%) while genotype B was predominant in asymptomatic carriers (72.2%). In addition, genotype and subtype distribution showed no significant differences between male and female patients, but genotype and subtype distribution showed significant differences in patients positive or negative with HBeAg.
<b>CONCLUSIONb>Subtypes Ba and C2 are predominant in patients with hepatitis B from these 6 cities, and genotype C may be associated with the development of liver cirrhosis and hepatocellular carcinoma.
Genotype ; Hepatitis B virus ; genetics ; Hepatitis B, Chronic ; virology ; Humans ; Liver Cirrhosis ; virology ; Liver Neoplasms ; virology ; Polymerase Chain Reaction
3.The study of correlation between distribution of hepatitis B virus genotypes and clinical character in Jiangxi province.
Long XU ; Da-ping CHE ; Ding-ying LÜ ; Nan XIE ; Zhi-cheng ZHANG ; Chun-teng LU ; Gang QIAN ; Ying-qing WAN ; Guo-wei WU ; Xiang-lin TU
Chinese Journal of Hepatology 2006;14(2):147-148
China
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Female
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Genotype
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Hepatitis B virus
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genetics
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Hepatitis B, Chronic
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virology
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Humans
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Male
7.Distribution of Hepatitis B Virus Genotypes according to the Clinical Outcomes in Patients with Chronic Hepatitis B Virus Infection in Jeju Island.
Bum Joon KIM ; Byung Cheol SONG
The Korean Journal of Gastroenterology 2003;42(6):496-501
BACKGROUND/AIMS: The genotype of hepatitis B virus (HBV) has been suggested to correlate with the clinical outcome of HBV infection. We analyzed the distribution of HBV genotypes according to the clinical outcomes of HBV infection in Jeju island. METHODS: A total of 145 HBsAg-positive samples were enrolled. To identify specific patterns of HBV genotypes, we performed restriction fragment length polymorphism (RFLP). In the case that typical restriction pattern of RFLP was not determined, phylogenetic analysis was performed. RESULTS: RFLP analysis was possible in 65 patients. Clinical diagnoses of the 65 patients with chronic liver disease were as follows: HBeAg-positive healthy carrier (HBeAg+, anti-HBe, HBV DNA+, transaminase normal; n=20); Inactive HBsAg carrier (n=12); chronic hepatitis B (n=14); liver cirrhosis (n=9); hepatocellular carcinoma (n=10). Sixty-two patients showed a typical restriction pattern by HinfI. However, 3 patients showed a unique restriction pattern by HinfI, which were not reported in the literature. When phylogenetic analysis was performed to classify the genotype of these 3 patients, they were also genotype C. However, all 65 patients showed typical restriction patterns by Tsp509I, which were reported in genotype C. CONCLUSIONS: All chronic HBV infections are genotype C in Jeju island regardless of clinical outcomes.
Carcinoma, Hepatocellular/virology
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Carrier State/virology
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Genotype
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Hepatitis B virus/*genetics
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Hepatitis B, Chronic/complications/*virology
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Humans
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Liver Cirrhosis/virology
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Liver Neoplasms/virology
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Polymorphism, Restriction Fragment Length
10.Progress in silencing HBV gene expression by RNAi technologies.
Chinese Journal of Hepatology 2006;14(4):318-320