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A Competent Hepatocyte Model Examining Hepatitis B Virus Entry through Sodium Taurocholate Cotransporting Polypeptide as a Therapeutic Target
Published on: May 10, 2022
Cell culture assay system for the evaluation of natural product-mediated anti-Hepatitis B virus activity
H Mehdi1, G T Tan, J M Pezzuto
1Program for Collaborative Research in the Pharmaceutical Sciences, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL USA.
Abstract:
Utilizing the hepatitis B virus (HBV)-producing hepatoblastoma cell line, HepG2.2.15, which is stably transfected with the cloned HBV genome, methods were devised to examine the effects of test substances on intracellular extrachromosomal HBV DNA levels and secretion of hepatitis B surface antigen (HBsAg). The known inhibitor of HBV replication, dideoxycytosine (ddC), had a minor effect on the secretion of HBsAg, but >90% of intracellular extrachromosomal HBV DNA expression was lost at a non-cytotoxic drug concentration (25μM). This inhibitory effect was reversed when ddC was removed from the medium. Of 19 plant materials tested, extracts from the aerial parts of Clematis sinensis Lour, and Clerodendron inerme R. Br. significantly inhibited the secretion of HBsAg into the culture medium at non-cytotoxic concentrations, but had no effect on intracellular extrachromosomal HBV DNA levels. This system is useful for the evaluation of test materials, or combinations of test materials, for their potential to inhibit HBV markers.
