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  • Title: Significantly skewed memory CD8+ T cell subsets in HIV-1 infected infants during the first year of life.
    Author: Mansoor N, Abel B, Scriba TJ, Hughes J, de Kock M, Tameris M, Mlenjeni S, Denation L, Little F, Gelderbloem S, Hawkridge A, Boom WH, Kaplan G, Hussey GD, Hanekom WA.
    Journal: Clin Immunol; 2009 Mar; 130(3):280-9. PubMed ID: 18996749.
    Abstract:
    HIV-1 infection causes a severe T cell compromise; however, little is known about changes in naive, memory, effector and senescent T cell subsets during the first year of life. T cell subsets were studied over the first year of life in blood from 3 infant cohorts: untreated HIV-infected, HIV-exposed but uninfected, and HIV-unexposed. In HIV-infected infants, the frequency of CCR7(+)CD45RA(+) naive CD8(+) T cells was significantly decreased, while the frequency of CCR7(-)CD45RA(-) effector memory CD8(+) T cells was increased, compared with the control cohorts. A larger population of CD8(+) T cells in HIV-infected infants displayed a phenotype consistent with senescence. Differences in CD4(+) T cell subset frequencies were less pronounced, and no significant differences were observed between exposed and unexposed HIV-uninfected infants. We concluded that the proportion of naive, memory, effector and senescent CD8(+) T cells during the first year of life is significantly altered by HIV-1 infection.
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