Abstract
Hepatitis B virus (HBV) infection is a major global health problem. HBsAg inhibitors are expected to reduce the production of HBsAg via inhibiting host proteins PAPD5 & PAPD7 and finally achieve the ideal goal of “functional cure”. In this work, a series of tetrahydropyridine (THP) derivatives with a bridged ring were synthesized and evaluated for their inhibiting HBsAg production and HBV DNA activity. Among them, compound 17i was identified as potent HBsAg production inhibitor with excellent in vitro anti-HBV potency (HBV DNA EC50 = 0.018 μM, HBsAg EC50 = 0.044 μM) and low toxicity (CC50 > 100 μM). Moreover, 17i exhibited favorable in vitro/in vivo DMPK properties in mice. 17i could also significantly reduce serum HBsAg and HBV DNA levels (1.08 and 1.04 log units, respectively) in HBV transgenic mice.
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