title: Subgenotype D5, BCP and MHR mutations in hepatic complications among hepatitis B virus infected patients from Orissa, India.
abstract: The study was undertaken to investigate the clinical implications of hepatitis B virus (HBV) genotypes, basal core promoter (BCP), precore (PC) and surface gene mutations in HBV infected patients from Orissa, southeastern India. HBV infections were identified by serology testing and HBV DNA amplification by polymerase chain reaction among the 152 patients. After sequencing, surface gene mutation were studied by sequence analysis as well as by using BLOSUM scores and BCP mutations were studied only by sequence analysis. A high proportion of HBV/D5 (66.0%) was found among the study samples having significant relation with liver cirrhosis (LC) and hepatocellular carcinoma (HCC) patients (p<0.05). The BCP mutation, TA (81.4%) and C1753/TA (75.0%) was found in significant proportion (p<0.05) among HCC cases and in fact a gradual increase in these mutations were noted between inactive carriers (IC) to HCC group and also showed higher viral load. An increasing trend of major hydrophilic region (MHR) mutations in S gene was also observed from IC (56.0%) to chronic liver disease (CLD) (60.4%) to LC (72.4%) to HCC (95.0%) patients. In conclusion, our study suggests that the predominant HBV subgenotype HBV/D5 with high viral load and BCP mutations (double and triple) and high mutations in MHR region was significantly associated with advanced liver disease (LC and HCC) and might act as predictor of severe hepatic complications.
authors: ICMR Virus Unit, Kolkata, ID & BG Hospital Campus, Kolkata, India.
authors: Rajesh
authors: R
authors: Panigrahi
authors: Avik
authors: A
authors: Biswas
authors: Arup
authors: A
authors: Banerjee
authors: Shivaram Prasad
authors: SP
authors: Singh
authors: Manas K
authors: MK
authors: Panigrahi
authors: Anne Marie
authors: AM
authors: Roque-Afonso
authors: Haribhakti Seba
authors: HS
authors: Das
authors: Pradip K
authors: PK
authors: Mahapatra
authors: Sekhar
authors: S
authors: Chakrabarti
authors: Runu
authors: R
authors: Chakravarty
mesh_terms: D000328:Adult; D000368:Aged; D000595:Amino Acid Sequence; D006528:Carcinoma, Hepatocellular / Q000821:virology; D016009:Chi-Square Distribution; D016384:Consensus Sequence; D004279:DNA, Viral / Q000235:genetics; D005260:Female; D005814:Genes, Viral; D005838:Genotype; D006509:Hepatitis B / Q000150:complications / Q000453:epidemiology / Q000821:virology*; D006515:Hepatitis B virus / Q000235:genetics*; D006801:Humans; D057927:Hydrophobic and Hydrophilic Interactions; D007194:India / Q000453:epidemiology; D008103:Liver Cirrhosis / Q000150:complications / Q000821:virology; D008113:Liver Neoplasms / Q000821:virology; D008297:Male; D008875:Middle Aged; D008969:Molecular Sequence Data; D009154:Mutation; D010802:Phylogeny; D019562:Viral Load; D014764:Viral Proteins / Q000737:chemistry / Q000235:genetics
chemical_list: D004279:DNA, Viral; D014764:Viral Proteins