Hepatitis B virus gene mutations in liver diseases: a report from New Delhi.

<h4>Objectives</h4>The study was designed to characterize the surface, core promoter, precore/core region sequences for the presence of mutations in hepatitis B virus (HBV) associated with different liver diseases.<h4>Methods</h4>567 HBV associated patients with different liv...

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Autores principales:	Abdul Malik, Deepak Kumar Singhal, Abdulmajeed Albanyan, Syed Akhtar Husain, P Kar
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3cdfca9b0a3148e1916dfbe1e01c1452
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spelling	oai:doaj.org-article:3cdfca9b0a3148e1916dfbe1e01c14522021-11-18T07:15:29ZHepatitis B virus gene mutations in liver diseases: a report from New Delhi.1932-620310.1371/journal.pone.0039028https://doaj.org/article/3cdfca9b0a3148e1916dfbe1e01c14522012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22720023/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Objectives</h4>The study was designed to characterize the surface, core promoter, precore/core region sequences for the presence of mutations in hepatitis B virus (HBV) associated with different liver diseases.<h4>Methods</h4>567 HBV associated patients with different liver diseases were enrolled in this study. All samples were analyzed for HBV surface, core promoter, precore/core region mutations and genotypes using PCR and direct sequencing.<h4>Results</h4>HBV genotype D (72.8%) was the predominant type followed by genotype A (27.2%). The serum viral load of HBV was highest in HBsAg carriers group and lowest in patients with hepatocellular carcinoma. 17.9% patients with cirrhosis and 24.6% hepatocellular carcinoma cases were ADV-resistant with rtA181T/V mutations in the S-gene. A1896T was found more frequently in fulminant hepatic failure compared to acute viral hepatitis patients (p = 0.038). T1753V mutation was significantly higher in patients with cirrhosis of liver (34.6%) than in chronic hepatitis (18.9%) and hepatocellular carcinoma patients (21.2%; p = 0.001). T1762/A1764 mutation was observed in all the groups. C1914G core gene mutation was associated with the hepatocellular carcinoma (32.2%) compared to other groups. HBV genotype D predominated in comparison to genotype A. An increased frequency of precore mutation and BCP double mutations amongst the population studied was also observed.<h4>Conclusion</h4>Mutations such as T1762/A1764, T1753V and C1914G were usually associated with advanced forms of liver disease and had an increased risk of HCC. The nucleotide variability in the basal core promoter and precore regions possibly plays a role in the progression of HBV disease. Prospective studies on the sequence variations of the preC/C region of the HBV genome and the molecular mechanisms in relation to progression of liver disease would aid in better understanding of the biological significance of HBV strains in India.Abdul MalikDeepak Kumar SinghalAbdulmajeed AlbanyanSyed Akhtar HusainP KarPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 6, p e39028 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Abdul Malik Deepak Kumar Singhal Abdulmajeed Albanyan Syed Akhtar Husain P Kar Hepatitis B virus gene mutations in liver diseases: a report from New Delhi.
description	<h4>Objectives</h4>The study was designed to characterize the surface, core promoter, precore/core region sequences for the presence of mutations in hepatitis B virus (HBV) associated with different liver diseases.<h4>Methods</h4>567 HBV associated patients with different liver diseases were enrolled in this study. All samples were analyzed for HBV surface, core promoter, precore/core region mutations and genotypes using PCR and direct sequencing.<h4>Results</h4>HBV genotype D (72.8%) was the predominant type followed by genotype A (27.2%). The serum viral load of HBV was highest in HBsAg carriers group and lowest in patients with hepatocellular carcinoma. 17.9% patients with cirrhosis and 24.6% hepatocellular carcinoma cases were ADV-resistant with rtA181T/V mutations in the S-gene. A1896T was found more frequently in fulminant hepatic failure compared to acute viral hepatitis patients (p = 0.038). T1753V mutation was significantly higher in patients with cirrhosis of liver (34.6%) than in chronic hepatitis (18.9%) and hepatocellular carcinoma patients (21.2%; p = 0.001). T1762/A1764 mutation was observed in all the groups. C1914G core gene mutation was associated with the hepatocellular carcinoma (32.2%) compared to other groups. HBV genotype D predominated in comparison to genotype A. An increased frequency of precore mutation and BCP double mutations amongst the population studied was also observed.<h4>Conclusion</h4>Mutations such as T1762/A1764, T1753V and C1914G were usually associated with advanced forms of liver disease and had an increased risk of HCC. The nucleotide variability in the basal core promoter and precore regions possibly plays a role in the progression of HBV disease. Prospective studies on the sequence variations of the preC/C region of the HBV genome and the molecular mechanisms in relation to progression of liver disease would aid in better understanding of the biological significance of HBV strains in India.
format	article
author	Abdul Malik Deepak Kumar Singhal Abdulmajeed Albanyan Syed Akhtar Husain P Kar
author_facet	Abdul Malik Deepak Kumar Singhal Abdulmajeed Albanyan Syed Akhtar Husain P Kar
author_sort	Abdul Malik
title	Hepatitis B virus gene mutations in liver diseases: a report from New Delhi.
title_short	Hepatitis B virus gene mutations in liver diseases: a report from New Delhi.
title_full	Hepatitis B virus gene mutations in liver diseases: a report from New Delhi.
title_fullStr	Hepatitis B virus gene mutations in liver diseases: a report from New Delhi.
title_full_unstemmed	Hepatitis B virus gene mutations in liver diseases: a report from New Delhi.
title_sort	hepatitis b virus gene mutations in liver diseases: a report from new delhi.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/3cdfca9b0a3148e1916dfbe1e01c1452
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Hepatitis B virus gene mutations in liver diseases: a report from New Delhi.

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