Genetic heterogeneity in the precore region of hepatitis B virus in hepatitis B e antigen-negative chronic hepatitis B patients: spontaneous seroconversion and interferon-induced seroconversion.

Abstract:

:To elucidate the relationship between the clinical severity of chronic liver disease and the precore mutations in hepatitis B e antigen (HBeAg)-negative hepatitis B virus (HBV) carriers, mutations were investigated in the precore region of HBV DNA in 20 chronic hepatitis B patients who seroconverted either spontaneously or after the administration of alpha-interferon (IFN), and 5 asymptomatic carriers. The precore mutation with a stop codon at nucleotide 1896 was found in all patients, irrespective of the histology and in all asymptomatic carriers. The second mutation at nucleotide 1899 was found in 40% of cases studied but always followed by the first mutation at nucleotide 1896. The mixed viral infection of precore mutant and wild-type HBV virus was found in 40% of seroconverted cases after IFN treatment and in sera of HBV carriers obtained within a year after the spontaneous seroconversion. These data suggest that the precore mutants prevail over wild-type HBV in all HBeAg-negative HBV carriers within several years after the seroconversion, but their prevalence could not confine the clinical severity of chronic liver disease.

journal_name

J Med Virol

authors

Karasawa T,Aizawa Y,Zeniya M,Kuramoto A,Shirasawa T,Toda G

doi

10.1002/jmv.1890450404

subject

Has Abstract

pub_date

1995-04-01 00:00:00

pages

373-80

issue

4

eissn

0146-6615

issn

1096-9071

journal_volume

45

pub_type

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