Hepatitis B and D viruses replication interference: Influence of hepatitis B genotype

• Published in: World journal of gastroenterology : WJG 2016-03, Vol.22 (11), p.3165-3174
• Main Author: Antonio Madejón Míriam Romero ángela Hernández Araceli García-Sánchez Marta Sánchez-Carrillo Antonio Olveira Javier García-Samaniego
• Format: Article
• Language: English
• Subjects: Adult; Basic Study; Biomarkers - blood; Coinfection; Cross-Sectional Studies; DNA, Viral - blood; DNA, Viral - genetics; Female; Genotype; Hepatitis; Hepatitis B - complications; Hepatitis B - diagnosis; Hepatitis B - virology; Hepatitis B Surface Antigens - blood; Hepatitis B virus - genetics; Hepatitis B virus - growth & development; Hepatitis B virus - immunology; Hepatitis D, Chronic - complications; Hepatitis D, Chronic - diagnosis; Hepatitis D, Chronic - virology; Hepatitis Delta Virus - genetics; Hepatitis Delta Virus - growth & development; hepatitis; Replication; HIV Infections - complications; HIV Infections - virology; Humans; interference; Viral; Longitudinal Studies; Male; Middle Aged; replication; Retrospective Studies; RNA, Viral - blood; RNA, Viral - genetics; Time Factors; Viral Load; Virus Replication; virus; Delta; virus; Hepatitis
• ISSN: 1007-9327; 2219-2840
• DOI: 10.3748/wjg.v22.i11.3165

AIM: To study the hepatitis B virus(HBV) and hepatitis D virus(HDV) replication interferences in patients with chronic hepatitis delta infected with different HBV genotypes.METHODS: We conducted a transversal study including 68 chronic hepatitis delta(CHD)(37 HIVpositive) patients and a control group of 49 chronic hepatitis B(CHB)(22 HIV-positive) patients. In addition, a dynamic follow-up was performed in 16 CHD patients. In all the samples, the surface antigen of hepatitis B(HBs Ag) serum titers were analyzed with the Monolisa HBs Ag Ultra system(Bio-Rad), using as quantification standard a serial dilution curve of an international HBs Ag standard. Serum HBV-DNA titers were analyzed using the Roche Cobas Taq Man(Roche, Barcelona, Spain), and the serum HDV-RNA using an in-house real-time q RT-PCR method, with Taq Man probes. HBV genotype was determined with the line immunoassay Li PA HBV genotyping system(Innogenetics, Ghent, Belgium). In those patients negative for Li PA assay, a nested PCR method of complete HBs Ag coding region, followed by sequence analysis was applied.RESULTS: No differences in the HBV-DNA levels were found in CHB patients infected with different HBV genotypes. However, in CHD patients the HBV-DNA levels were lower in those infected with HBV-A than in those with HBV-D, both in HIV negative [median(IQR): 1.25(1.00-1.35) vs 2.95(2.07-3.93) log10(copies/m L), P = 0.013] and HIV positive patients [2.63(1.24-2.69) vs 7.25(4.61-7.55) log10(copies/m L), P < 0.001]. This was confirmed in the dynamic study of the HBV/HDV patients. These differences induce an under-estimation of HBV-A incidence in patients with CHD analyzed with Li PA assay. Finally, the HBs Ag titers reflected no significant differences in CHD patients infected with HBV-A or D.CONCLUSION: Viral replication interference between HBV and HDV is HBV-genotype dependent, and more evident in patients infected with HBV-genotype A, than with HBV-D or E.