Kumar, Gollapudi Tarun ; Kazim, Syed Naqui ; Kumar, Manoj ; Hissar, Syed ; Chauhan, Ranjit ; Basir, Seemi Farhat ; Sarin, Shiv Kumar (2009) Hepatitis B virus genotypes and hepatitis B surface antigen mutations in family contacts of hepatitis B virus infected patients with occult hepatitis B virus infection Journal of Gastroenterology and Hepatology, 24 (4). pp. 588-598. ISSN 0815-9319
Full text not available from this repository.
Official URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1440-...
Related URL: http://dx.doi.org/10.1111/j.1440-1746.2008.05727.x
Abstract
Background: The association and profile of surface gene mutations with viral genotypes have been studied in patients with chronic hepatitis B virus (HBV) but not in subjects with occult HBV infection. Aim: This study aimed to investigate the association of surface gene mutations with viral genotypes in occult HBV infection. Materials &Methods: Of 293 family contacts of 90 chronic HBV index patients, 110 consented for the study. Of 110 subjects, 97 were hepatitis B surface antigen (HBsAg) negative. HBV genotyping was done using direct DNA sequencing. The S-gene was also sequenced in 13 chronic hepatitis B patients to serve as controls. Results: Twenty-eight (28.8%) of the 97 subjects had occult HBV infection. Bidirectional sequencing of partial S-gene was successful in 13 of them. Seven (53.8%) of the viral sequences are genotype A1, two (15.3%) each having genotypes D5&D2 and one each (7.6%) having D1&G genotypes. Seven (53.8%) of the 13 HBsAg positive patients, had genotype D&6 (46.1%) genotype A. A128V &T143M mutations were observed in 5 of 13 (38.4%) subjects and A128V &P127S in 2 of 13 (15.3%) patients (P = 0.385). A128V mutation was seen in two (15.3%) subjects with D2 genotype, while T143M mutation was seen in three (23.07%) subjects with A1genotype. At aa125, three (23.07%) subjects with D5 genotype had methionine instead of threonine. There were wild type sequences in five (38.4%) subjects, one each of D1, G genotypes (20%) and four A1 (80%) genotypes. None of the subjects had G145R mutation. Conclusions: Occult HBV infection may be common in household contacts of chronic HBV infected patients. Equal prevalence of A&D sub-genotypes was present in occult HBV subjects and in chronic HBV patients. Mutations of the S-gene are genotype specific in both occult as well as chronic HBV infection.
Item Type: | Article |
---|---|
Source: | Copyright of this article belongs to John Wiley and Sons. |
Keywords: | Anti-HBc Positivity; HBV DNA; Hepatitis B; Occult HBV |
ID Code: | 44197 |
Deposited On: | 21 Jun 2011 04:52 |
Last Modified: | 21 Jun 2011 04:52 |
Repository Staff Only: item control page