Human immunodeficiency virus coinfection differentially impacts hepatitis B virus viral markers based on hepatitis Be antigen status in patients with suppressed viremia

Hepatitis B virus (HBV) RNA and hepatitis B core‐related antigen (HBcrAg), reflecting transcriptional activity of covalently closed circular DNA, are gaining traction as important markers to assess viral activity. Whether their expression differs under viral suppression by HIV co‐infection status is unknown. Among adults with chronic HBV on antiviral therapy, we sought to determine if the expression of HBV markers (specialized and well‐established) differs between HBV‐HIV co‐infection vs. HBV mono‐infection. We compared HBV marker levels among 105 participants in the Hepatitis B Research Network (HBRN) HBV‐HIV Ancillary Study and 105 participants in the HBRN mono‐infected Cohort Study, matched for HBeAg status and HBV DNA suppression on therapy. Among HBeAg+ participants (N = 58 per group), after adjusting for age, sex, race, ALT and HBV DNA, viral markers were higher (p