Isothiafludine, a novel non-nucleoside compound, inhibits hepatitis B virus replication through blocking pregenomic RNA encapsidation
| Autor: | Yangming Zhang, Chunlan Feng, Wei Tang, Jianping Zuo, Fajun Nan, Dong-liang Yang, Fenghua Zhu, Xiankun Tong, Bao-ju Wang, Pei-Lan He, Guifeng Wang, Li Yang, Li-Ping Shi, Wen-Long Wang, You-hua Hao, Haijun Chen |
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| Rok vydání: | 2014 |
| Předmět: |
Hepatitis B virus
Time Factors Transfection Virus Replication medicine.disease_cause Antiviral Agents Hepatitis B Virus Duck Drug Resistance Multiple Viral medicine Animals Humans Pharmacology (medical) Northern blot Nucleocapsid Pharmacology Dose-Response Relationship Drug business.industry DNA replication virus diseases Hep G2 Cells General Medicine Hepadnaviridae Infections Virology digestive system diseases In vitro Blot Disease Models Animal Thiazoles HBcAg Ducks Capsid Hepatitis Viral Animal Mutation Agarose gel electrophoresis RNA Viral Original Article business |
| Zdroj: | Acta Pharmacologica Sinica. 35:410-418 |
| ISSN: | 1745-7254 1671-4083 |
| Popis: | To investigate the action of isothiafludine (NZ-4), a derivative of bis-heterocycle tandem pairs from the natural product leucamide A, on the replication cycle of hepatitis B virus (HBV) in vitro and in vivo. HBV replication cycle was monitored in HepG2.2.15 cells using qPCR, qRT-PCR, and Southern and Northern blotting. HBV protein expression and capsid assembly were detected using Western blotting and native agarose gel electrophoresis analysis. The interaction of pregenomic RNA (pgRNA) and the core protein was investigated by RNA immunoprecipitation. To evaluate the anti-HBV effect of NZ-4 in vivo, DHBV-infected ducks were orally administered NZ-4 (25, 50 or 100 mg·kg−1·d−1) for 15 d. NZ-4 suppressed intracellular HBV replication in HepG2.2.15 cells with an IC50 value of 1.33 μmol/L, whereas the compound inhibited the cell viability with an IC50 value of 50.4 μmol/L. Furthermore, NZ-4 was active against the replication of various drug-resistant HBV mutants, including 3TC/ETV-dual-resistant and ADV-resistant HBV mutants. NZ-4 (5, 10, 20 μmol/L) concentration-dependently reduced the encapsidated HBV pgRNA, resulting in the assembly of replication-deficient capsids in HepG2.2.15 cells. Oral administration of NZ-4 dose-dependently inhibited DHBV DNA replication in the DHBV-infected ducks. NZ-4 inhibits HBV replication by interfering with the interaction between pgRNA and HBcAg in the capsid assembly process, thus increasing the replication-deficient HBV capsids. Such mechanism of action might provide a new therapeutic strategy to combat HBV infection. |
| Databáze: | OpenAIRE |
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