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.
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.
Singh
K P
KP
Infectious Diseases Unit, Alfred Hospital, Australia.
Howard
J L
JL
Wild
S P
SP
Jones
S L
SL
Hoy
J
J
Lewin
S R
SR
D000328:Adult; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology*; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology*; D016022:Case-Control Studies; D003587:Cytomegalovirus / Q000276:immunology; D003586:Cytomegalovirus Infections / Q000150:complications / Q000276:immunology* / Q000821:virology; D005260:Female; D006678:HIV / Q000276:immunology*; D015658:HIV Infections / Q000150:complications / Q000276:immunology* / Q000821:virology; D006801:Humans; D007371:Interferon-gamma / Q000096:biosynthesis / Q000276:immunology; D008297:Male; D008875:Middle Aged
D007371:Interferon-gamma