MHC heterozygote advantage in simian immunodeficiency virus-infected Mauritian cynomolgus macaques.

Abstract:

:The importance of a broad CD8 T lymphocyte (CD8-TL) immune response to HIV is unknown. Ex vivo measurements of immunological activity directed at a limited number of defined epitopes provide an incomplete portrait of the actual immune response. We examined viral loads in simian immunodeficiency virus (SIV)-infected major histocompatibility complex (MHC)-homozygous and MHC-heterozygous Mauritian cynomolgus macaques. Chronic viremia in MHC-homozygous macaques was 80 times that in MHC-heterozygous macaques. Virus from MHC-homozygous macaques accumulated 11 to 14 variants, consistent with escape from CD8-TL responses after 1 year of SIV infection. The pattern of mutations detected in MHC-heterozygous macaques suggests that their epitope-specific CD8-TL responses are a composite of those present in their MHC-homozygous counterparts. These results provide the clearest example of MHC heterozygote advantage among individuals infected with the same immunodeficiency virus strain, suggesting that broad recognition of multiple CD8-TL epitopes should be a key feature of HIV vaccines.

journal_name

Sci Transl Med

authors

O'Connor SL,Lhost JJ,Becker EA,Detmer AM,Johnson RC,Macnair CE,Wiseman RW,Karl JA,Greene JM,Burwitz BJ,Bimber BN,Lank SM,Tuscher JJ,Mee ET,Rose NJ,Desrosiers RC,Hughes AL,Friedrich TC,Carrington M,O'Connor DH

doi

10.1126/scitranslmed.3000524

subject

Has Abstract

pub_date

2010-03-10 00:00:00

pages

22ra18

issue

22

eissn

1946-6234

issn

1946-6242

pii

2/22/22ra18

journal_volume

2

pub_type

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