Large-scale viral genome analysis identifies novel clinical associations between hepatitis B virus and chronically infected patients
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Despite the high global prevalence of chronic hepatitis B (CHB) infection, datasets covering the whole hepatitis B viral genome from large patient cohorts are lacking, greatly limiting our understanding of the viral genetic factors involved in this deadly disease. We performed deep sequencing of viral samples from patients chronically infected with HBV to investigate the association between viral genome variation and patients’ clinical characteristics. We discovered novel viral variants strongly associated with viral load and HBeAg status. Patients with viral variants C1817T and A1838G had viral loads nearly three orders of magnitude lower than patients without those variants. These patients consequently experienced earlier viral suppression while on treatment. Furthermore, we identified novel variants that either independently or in combination with precore mutation G1896A were associated with the transition from HBeAg positive to negative phase of infection. These observations are consistent with the hypothesis that mutation of the HBeAg open reading frame is an important ... (Show More)
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Deep sequencing of viral samples (average ~9,000x coverage) from patients chronically infected with Hepatitis B (HBV). Whole HBV genome sequencing of 1467 patients (1102 in discovery and 365 in validation cohort) chronically infected with HBV at baseline. The patient population contained HBV genotypes A (98), B (285), C (716), D (356), E (7), and F (5) with 977 HBeAg-positive and 490 HBeAg-negative patients.
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