2023 Fiscal Year Final Research Report
Molecular mechanism, dynamics, and interaction with environment in the hepatitis B virus entry system
Project/Area Number |
20H03499
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Review Section |
Basic Section 49060:Virology-related
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Research Institution | National Institute of Infectious Diseases |
Principal Investigator |
Watashi Koichi 国立感染症研究所, 治療薬・ワクチン開発研究センター, 治療薬開発総括研究官 (40378948)
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Project Period (FY) |
2020-04-01 – 2023-03-31
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Keywords | HBV |
Outline of Final Research Achievements |
We analyzed the regulation mechanisms of hepatitis B virus (HBV) entry by an entry receptor, NTCP, and its cofactor EGFR. We found that HBV entry involves preS1-NTCP binding, NTCP oligomerization mediated by EGFR, and internalization followed by endosomal trafficking. We also identified a ligand that stimulated the intracellular virus dynamics. As the inhibitor of this dynamics impaired HBV infection, this pathway is expected to be a new drug target. Moreover, we solved the structure of NTCP protein and its functional sites that was essential for the regulation of HBV infection.
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Free Research Field |
HBV
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Academic Significance and Societal Importance of the Research Achievements |
本研究によって、HBVの細胞侵入の制御メカニズムおよび感染宿主決定要因の一端を明らかにした。学術的には、この侵入制御機構は他のウイルスには見られないユニークなものであり、HBVの狭い宿主域を説明するメカニズムと考えられる。また臨床的ニーズに対しては、これらの知見は新たな抗ウイルス薬や感染中和抗体の開発に重要な情報を提供するものであり、今後の創薬研究において新たなアプローチの手がかりとして有用である。
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