Background
While higher levels of hepatitis B virus (HBV) replication in HIV-HBV co-infection may relate to liver disease progression, this has not been completely elucidated. We utilized expression of hepatitis B core antigen (HBcAg) in liver biopsies from HIV-HBV co-infected and HBV mono-infected patients as a marker for HBV replication, and related these findings to clinical and histological parameters.
Methods
Data from 244 HBV patients were compared to 34 HIV-HBV patients. Liver biopsies were scored for inflammation, fibrosis, HBcAg, and hepatitis B surface antigen (HBsAg). Univariate and multivariate analyses were performed.
Results
HBcAg, but not HBsAg, staining was stronger in HIV co-infected than in HBV mono-infected. Co-infected and HBV mono-infected had similar ALT, inflammatory and fibrosis scores, and hepatitis B e Antigen (HBeAg) status. HBcAg staining correlated with HIV after correcting for HBV DNA and HBeAg. CD4 counts and HIV RNA level did not correlate with intensity of HBcAg staining. HBV DNA levels were higher in HIV co-infected and correlated with HBcAg staining.
Conclusions
By looking at HBcAg as a reflection of HBV replication in HIV-HBV co-infected with controlled HIV, our findings suggest that these patients may have subtle immune function defects, which could lead to adverse liver disease outcomes.