2014 Fiscal Year Final Research Report
Screening for novel host factors that regulate HIV-1 replication
| Project/Area Number |
24590557
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Virology
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| Research Institution | Chiba Institute of Technology |
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Principal Investigator |
TAKAKU Hiroshi 千葉工業大学, 附属研究所, 専任研究員 (50101267)
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| Research Collaborator |
CHANG Myitt Oo
ABE Makoto
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | APOBEC3G / HSP70 / HIV-1 / HIV-1 Vif / PGA1 / non-permissive cells / MAGI cells / 宿主内因子 |
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| Outline of Final Research Achievements |
We investigated a new role of prostaglandin A1 (PGA1) in the replication of HIV-1 in non-permissive cells.Because overexpression of HSP70 blocks the viral infectivity factor (Vif)-mediated degradation of APOBEC3G (A3G) via the ubiquitin-proteasome pathway, we examined the effects of PGA1 on A3G and HIV-1 replication.The induction of HSP70 synthesis by PGA1 blocked Vif-mediated A3G degradation and enhanced the incorporation of A3G into both wild-type and Vif-deficient viruses. Furthermore, we determined the viral titer of HIV-1 particles produced from PGA1-treated 293T cells. The induction of HSP70 synthesis by PGA1 significantly reduced the viral titer in the presence of A3G. Additionally, the p24 Gag antigen levels were dramatically reduced in non-permissive cells treated once or repeatedly with PGA1.These results suggest that a new mechanism used by prostaglandins may aid in the search for novel anti-retroviral drugs.
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| Free Research Field |
分子生物学、ウイルス学
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