Transmission of G145R mutant of HBV to an unrelated contact
- 1 May 2005
- journal article
- case report
- Published by Wiley in Journal of Medical Virology
- Vol. 76 (1), 40-46
- https://doi.org/10.1002/jmv.20321
Abstract
Household contacts of HBV-related chronic liver disease patients constitute a high-risk group for acquisition of HBV infection. Some of the HBsAg mutants are associated with liver disease and some are reported to be transmitted vertically. There is limited information on the horizontal transmission of Gly 145 Arg (G145R) mutant to related contacts. Its possible transmission to an unrelated third degree contact is reported in the present study. An HBV related chronic liver disease patient; the index patient, and his 11 household contacts were studied. This included four 1 degrees, three 2 degrees, one 3 degrees, and a sexual contact. Surface gene sequencing including the "a" determinant region was carried out in HBV DNA+ve subjects. The sequences were aligned and compared for the homology. HBV DNA was found to be positive in one 1 degrees, three 2 degrees, and one 3 degrees contact, besides the index patient. Histopathological studies revealed evidence of chronic hepatitis in all these contacts. Mutation T118V was present in all the six subjects. Mutant G145R along with T118V and T143M was identified in three subjects who included one 1 degrees, one 2 degrees, and one 3 degrees contact. Presence of T118V and T143M mutations along with G145R mutation in these subjects provides an indirect evidence for the possible horizontal transmission of G145R HBV variant to a 3 degrees unrelated contact. Of these three contacts with G145R mutation, only one 1 degrees contact was found to be HBsAg-ve. The data also reaffirms the earlier finding of HBsAg positivity in presence of G145R mutation of the S-gene. HBV exists as quasi-species and mixed population in subjects with chronic HBV infection.Keywords
This publication has 20 references indexed in Scilit:
- Changes of hepatitis B surface antigen variants in carrier children before and after universal vaccination in taiwanHepatology, 1999
- Surface gene mutants of hepatitis B virus in infants who develop acute or chronic infections despite immunoprophylaxisHepatology, 1997
- Detection of Hepatitis B Surface Gene Mutation in Carrier Children with or without Immunoprophylaxis at BirthThe Journal of Infectious Diseases, 1997
- Discontinuous epitopes of hepatitis B surface antigen derived from a filamentous phage peptide library.Proceedings of the National Academy of Sciences of the United States of America, 1996
- Mutations of some critical amino acid residues in the hepatitis B virus surface antigenJournal of Medical Virology, 1995
- A Novel Antibody Escape Variant (Ala 144) of Hepatitis B Virus in an Identical Twin Before Selection in the MotherPublished by Springer Science and Business Media LLC ,1994
- Gly145 to Arg substitution in HBs antigen of immune escape mutant of hepatitis B virusBiochemical and Biophysical Research Communications, 1992
- Independent emergence of a vaccine-induced escape mutant of hepatitis B virusJournal of Hepatology, 1991
- Vaccine-induced escape mutant of hepatitis B virusThe Lancet, 1990
- Subtype ayw variant of hepatitis B virusFEBS Letters, 1985