HBV genotypes and response to tenofovir disoproxil fumarate in HIV/HBV-coinfected persons

Bihl, Florian; Martinetti, Gladys; Wandeler, Gilles; Weber, Rainer; Ledergeber, Bruno; Calmy, Alexandra; Battegay, Manuel; Cavassini, Matthias; Vernazza, Pietro; Caminada, Anna-Paola; Rickenbach, Martin; Bernasconi, Enos (2015). HBV genotypes and response to tenofovir disoproxil fumarate in HIV/HBV-coinfected persons. BMC gastroenterology, 15, p. 79. BioMed Central 10.1186/s12876-015-0308-0

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BACKGROUND Hepatitis B virus (HBV) genotypes can influence treatment outcome in HBV-monoinfected and human immunodeficiency virus (HIV)/HBV-coinfected patients. Tenofovir disoproxil fumarate (TDF) plays a pivotal role in antiretroviral therapy (ART) of HIV/HBV-coinfected patients. The influence of HBV genotypes on the response to antiviral drugs, particularly TDF, is poorly understood. METHODS HIV/HBV-co-infected participants with detectable HBV DNA prior to TDF therapy were selected from the Swiss HIV Cohort Study. HBV genotypes were identified and resistance testing was performed prior to antiviral therapy, and in patients with delayed treatment response (>6 months). The efficacy of TDF to suppress HBV (HBV DNA <20 IU/mL) and the influence of HBV genotypes were determined. RESULTS 143 HIV/HBV-coinfected participants with detectable HBV DNA were identified. The predominant HBV genotypes were A (82 patients, 57 %); and D (35 patients, 24 %); 20 patients (14 %) were infected with multiple genotypes (3 % A + D and 11 % A + G); and genotypes B, C and E were each present in two patients (1 %). TDF completely suppressed HBV DNA in 131 patients (92 %) within 6 months; and in 12 patients (8 %), HBV DNA suppression was delayed. No HBV resistance mutations to TDF were found in patients with delayed response, but all were infected with HBV genotype A (among these, 5 patients with genotype A + G), and all had previously been exposed to lamivudine. CONCLUSION In HIV/HBV-coinfected patients, infection with multiple HBV genotypes was more frequent than previously reported. The large majority of patients had an undetectable HBV viral load at six months of TDF-containing ART. In patients without viral suppression, no TDF-related resistance mutations were found. The role of specific genotypes and prior lamivudine treatment in the delayed response to TDF warrant further investigation.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Social and Preventive Medicine
04 Faculty of Medicine > Department of Haematology, Oncology, Infectious Diseases, Laboratory Medicine and Hospital Pharmacy (DOLS) > Clinic of Infectiology

UniBE Contributor:

Wandeler, Gilles

Subjects:

300 Social sciences, sociology & anthropology > 360 Social problems & social services
600 Technology > 610 Medicine & health

ISSN:

1471-230X

Publisher:

BioMed Central

Language:

English

Submitter:

Annelies Luginbühl

Date Deposited:

30 Jul 2015 09:22

Last Modified:

09 Feb 2016 10:57

Publisher DOI:

10.1186/s12876-015-0308-0

PubMed ID:

26152237

BORIS DOI:

10.7892/boris.70336

URI:

https://boris.unibe.ch/id/eprint/70336

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