SciELO - Scientific Electronic Library Online

 
vol.52 número3Validation of a rapid stool antigen test for diagnosis of Helicobacter pylori infection índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Revista do Instituto de Medicina Tropical de São Paulo

versión impresa ISSN 0036-4665

Resumen

SITNIK, Roberta; PAES, Ângela; MANGUEIRA, Cristovão Pitangueira  y  PINHO, João Renato Rebello. A real-time quantitative assay for hepatitis B DNA virus (HBV) developed to detect all HBV genotypes. Rev. Inst. Med. trop. S. Paulo [online]. 2010, vol.52, n.3, pp. 119-124. ISSN 0036-4665.  http://dx.doi.org/10.1590/S0036-46652010000300001.

Hepatitis B virus (HBV) is a major cause of chronic liver disease worldwide. Besides genotype, quantitative analysis of HBV infection is extensively used for monitoring disease progression and treatment. Affordable viral load monitoring is desirable in resource-limited settings and it has been already shown to be useful in developing countries for other viruses such as Hepatitis C virus (HCV) and HIV. In this paper, we describe the validation of a real-time PCR assay for HBV DNA quantification with TaqMan chemistry and MGB probes. Primers and probes were designed using an alignment of sequences from all HBV genotypes in order to equally amplify all of them. The assay is internally controlled and was standardized with an international HBV panel. Its efficacy was evaluated comparing the results with two other methods: Versant HBV DNA Assay 3.0 (bDNA, Siemens, NY, USA) and another real-time PCR from a reference laboratory. Intra-assay and inter-assay reproducibilities were determined and the mean of CV values obtained were 0.12 and 0.09, respectively. The assay was validated with a broad dynamic range and is efficient for amplifying all HBV genotypes, providing a good option to quantify HBV DNA as a routine procedure, with a cheap and reliable protocol.

Palabras llave : HBV DNA quantification; Real Time PCR; Hepatitis B virus; Viral load.

        · resumen en Portugués     · texto en Inglés     · pdf en Inglés