Data/hora: 10/06/2024 06:48:10

Provedor de dados: 	55	
País: 	Brazil	
Título: 	Hepatitis B virus genotypes, precore mutations, and basal core promoter mutations in HBV-infected Chinese patients with persistently normal alanine aminotransferase and low serum HBV-DNA levels	
Autores: 	Shi,Ming; Zhang,Yong; Zhang,Jing; Liu,Wei; Xing,Lu.	
Data: 	2012-02-01	
Ano: 	2012	
Palavras-chave: 	Hepatitis B virus; Genotype; Mutation; Alanine transaminase.	
Resumo: 	Hepatitis B virus (HBV) genotype and precore and basal core promoter (BCP) mutants in the patients with persistently normal alanine aminotransferase (ALT) and low serum HBV-DNA levels are unclear. The aim of this study was to determine HBV genotypes, precore and BCP mutations, and their association with chronic hepatitis and liver fibrosis in HBV-infected patients with persistently normal ALT, and low serum HBV-DNA levels in northeast China. Patients (n = 89) with normal ALT and serum HBV-DNA levels below 20000 IU/mL but detectable with real-time PCR were included in this study. HBV genotypes were determined by real-time PCR. The precore and BCP mutations were detected by sequencing. All the patients had biopsy results. Of the 89 patients, 11 (12.4%) were genotype B and 78 (87.6%) were genotype C. The most common mutations were G1896A (23.6%), G1764A (9.0%), and A1762T (6.7%). The prevalence of precore mutation was significantly higher in genotype B patients than in genotype C patients (54.5% vs. 19.2%, p &lt; 0.01). There was no significant difference in the prevalence of BCP mutations between genotype B and genotype C (18.2% vs. 10.2%). Multivariate analysis showed that old age (&amp;gt; 40 years) and BCP mutations were independent predictors of liver necroinflammation and fibrosis. Thus, BCP mutations may be associated with liver necroinflammation and fibrosis in patients with persistently normal ALT and low serum HBV-DNA levels in northeast China.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702012000100009	
Editor: 	Brazilian Society of Infectious Diseases	
Relação: 	10.1590/S1413-86702012000100009	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Infectious Diseases  v.16 n.1 2012	
Fonte: 	info:eu-repo/semantics/openAccess