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Phosphoantigen-expanded human gammadelta T cells display potent cytotoxicity against monocyte-derived macrophages infected with human and avian influenza viruses #MMPMID19656068
Qin G; Mao H; Zheng J; Sia SF; Liu Y; Chan PL; Lam KT; Peiris JS; Lau YL; Tu W
J Infect Dis 2009[Sep]; 200 (6): 858-65 PMID19656068show ga
BACKGROUND: Influenza virus is a cause of substantial annual morbidity and mortality worldwide. The potential emergence of a new pandemic strain (eg, avian influenza virus) is a major concern. Currently available vaccines and anti-influenza drugs have limited effectiveness for influenza virus infections, especially for new pandemic strains. Therefore, there is an acute need to develop alternative strategies for influenza therapy. gammadelta T cells have potent antiviral activities against different viruses, but no data are available concerning their antiviral activity against influenza viruses. METHODS: In this study, we used virus-infected primary human monocyte-derived macrophages (MDMs) to examine the antiviral activity of phosphoantigen isopentenyl pyrophosphate (IPP)-expanded human Vgamma9Vdelta2 T cells against influenza viruses. RESULTS: Vgamma9Vdelta2 T cells were selectively activated and expanded by IPP from peripheral blood mononuclear cells. IPP-expanded Vgamma9Vdelta2 T cells efficiently killed MDMs infected with human (H1N1) or avian (H9N2 or H5N1) influenza virus and significantly inhibited viral replication. The cytotoxicity of Vgamma9Vdelta2 T cells against influenza virus-infected MDMs was dependent on NKG2D activation and was mediated by Fas-Fas ligand and perforin-granzyme B pathways. CONCLUSION: Our findings suggest a potentially novel therapeutic approach to seasonal, zoonotic avian, and pandemic influenza-the use of phosphoantigens to activate gammadelta T cells against influenza virus infections.
|*Hemiterpenes[MESH]
|*Organophosphorus Compounds[MESH]
|Animals[MESH]
|Cytotoxicity, Immunologic[MESH]
|Gene Expression Regulation/physiology[MESH]
|Granzymes/metabolism[MESH]
|Humans[MESH]
|Influenza A Virus, H1N1 Subtype/*physiology[MESH]
|Influenza A Virus, H5N1 Subtype/*physiology[MESH]
|Influenza A Virus, H9N2 Subtype/*physiology[MESH]