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  • Title: Human cytomegalovirus (CMV)-specific CD8+ T cell responses are reduced in HIV-infected individuals with a history of CMV disease despite CD4+ T cell recovery.
    Author: Singh KP, Howard JL, Wild SP, Jones SL, Hoy J, Lewin SR.
    Journal: Clin Immunol; 2007 Aug; 124(2):200-6. PubMed ID: 17574925.
    Abstract:
    Cytomegalovirus (CMV)-specific immunity was investigated in human immunodeficiency virus (HIV)-infected individuals. A case-control (1:2) study was performed with cases defined as having a history of CMV end-organ disease (n=15) and controls (n=30) matched by current CD4(+) T cell count. CMV-specific CD8(+) T cells responses were quantified using the high throughput Quantiferon-CMV test (Cellestis, Melbourne, Australia). 40/44 (91%) had a positive Quantiferon-CMV test and the magnitude of response to CMV peptides correlated significantly with response to mitogen (p<0.0001) but not with CD4(+) T cell count at the time of testing, CD4(+) T cell nadir or HIV viral load. Cases had a significantly lower Quantiferon-CMV test than controls but there was no significant difference in response to mitogen or other antigens. In individuals with a history of CMV disease, CMV-specific CD8(+) T cell responses are reduced even in the setting of CD4(+) T cell reconstitution.
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