Screening of inhibitors of influenza A virus PA endonuclease
Project/Area Number |
22590422
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Virology
|
Research Institution | Tokushima Bunri University |
Principal Investigator |
|
Project Period (FY) |
2010 – 2012
|
Project Status |
Completed (Fiscal Year 2012)
|
Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
|
Keywords | RNA ポリメラーゼ / インフルエンザ / エンドヌクレアーゼ / カテキン / サリドマ イド / フェネチルフェニルフサリミド / 天然物化合物 / 阻害剤 / influenza / RNAポリメラーゼ / PA / PB2 / endonuclease / PB1 / マルカンチン / 苔 / ビスビベンジル / サリドマイド |
Research Abstract |
The H1N1 influenza A virus of swine-origin caused pandemics throughout the world in2009 and the highly pathogenic H5N1 avian influenza virus has also caused epidemics in Southeast Asia in recent years. The threat of influenza A thus remains a serious global health issue and novel drugs that target these viruses are highly desirable. Influenza A possesses an endonuclease within its RNA polymerase which comprises PA, PB1 and PB2 subunits. To identify potential new anti-influenza compounds in our current study, we screened 33 different types of phytochemicals using a PA endonuclease inhibition assay in vitro and an anti-influenza A virus assay. The marchantins are macrocyclic bisbibenzyls found in liverworts, and plagiochin A and perrottetin F are marchantin-related phytochemicals. We found from our screen that marchantin A, B, E, plagiochin A and perrottetin F inhibit influenza PA endonuclease activity in vitro. These compounds have a 3,4-dihydroxyphenethyl group in common, indicating th
… More
e importance of this moiety for the inhibition of PA endonuclease. Docking simulations of marchantin E with PA endonuclease suggest a putative “fitting and chelating model” as the mechanism underlying PA endonuclease inhibition. The docking amino acids are well conserved between influenza A and B. In a cultured cell system, marchantin E was further found to inhibit the growth of both H3N2 and H1N1 influenza A viruses, and marchantin A, E and perrotein F showed inhibitory properties towards the growth of influenza B. These marchantins also decreased the viral infectivity titer, with marchantin E showing the strongest activity in this assay. We additionally identified a chemical group that is conserved among different anti-influenza chemicals including marchantins, green tea catechins and dihydroxy phenethylphenylphthalimides. Our present results indicate that marchantins are candidate anti-influenza drugs and demonstrate the utility of the PA endonuclease assay in the screening of phytochemicals for anti-influenza characteristics. Less
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Report
(4 results)
Research Products
(111 results)
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[Journal Article] Anti-influenza activity of C60 fullerene derivatives.2013
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Shoji M., Takahashi E., Hatakeyama D., IwaiY.,MoritaY.,Shirayama R.,Echigo N., Kido H., Nakamura S., Mashino T., Okutani T., Kuzuhara T.
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Journal Title
PLoS ONE
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Hiasa M, Kurokawa M, Ohta K, Esumi T, Akita H, Niki K, Yagi Y, Echigo N, Hatakeyama D, Kuzuhara T.
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Food Research International
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Pages: 72-80
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[Journal Article] Anti-Influenza Activity of Marchantins, Macrocyclic Bisbibenzyls Contained in Liverworts.2011
Author(s)
Iwai Y, Murakami K, Gomi Y, Hashimoto T, Asakawa Y, Okuno Y, Ishikawa T, Hatakeyama D, Echigo N, Kuzuhara T.
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Journal Title
PLoS ONE
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Issue: 5
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Iwai Y, Takahashi H, Hatakeyama D, Motoshima K, Ishikawa M, Sugita K, Hashimoto Y, Harada Y, Itamura S, Odagiri T, Tashiro M, Sei Y, Yamaguchi K, Kuzuhara T.
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Bioorganic & Medicinal Chemistry
Volume: 18
Issue: 14
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第49回日本薬学会中国四国支部学術大会
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