Evasion of CD8+ T cells is critical for superinfection by cytomegalovirus.
Evasion of CD8+ T cells is critical for superinfection by cytomegalovirus.
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DOI:
10.1126/science.1185350
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发表时间:
2010-04-02
期刊:
影响因子:
--
通讯作者:
Früh K
中科院分区:
文献类型:
--
作者:
Hansen SG;Powers CJ;Richards R;Ventura AB;Ford JC;Siess D;Axthelm MK;Nelson JA;Jarvis MA;Picker LJ;Früh K
Cytomegalovirus (CMV) can super-infect persistently infected hosts despite CMV-specific humoral and cellular immunity; however, how it does so remains undefined. Here, we demonstrate that super-infection of rhesus CMV-infected rhesus macaques (RM) requires evasion of CD8+ T cell immunity by virally-encoded inhibitors of MHC-I antigen presentation, particularly the homologues of human CMV US2, 3, 6 and 11. In contrast, MHC-I interference was dispensable for primary infection of RM, or for the establishment of a persistent secondary infection in CMV-infected RM transiently depleted of CD8+ lymphocytes. These findings demonstrate that US2-11 glycoproteins promote evasion of CD8+ T cells in vivo thus supporting viral replication and dissemination during super-infection, a process that complicates the development of preventative CMV vaccines, but that can be exploited for CMV-based vector development.
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