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• W1971439968 abstract "<b><i>Background:</i></b> Some premature features of immunosenescence have been associated with persistent viral infections and altered populations of T cells. In particular, the inverted T CD4:CD8 ratio has been correlated with increased morbidity and mortality across different age groups. <b><i>Objective:</i></b> Here, we investigated the role of persistent viral infections, cognitive and functional states as predictors of inverted CD4:CD8 ratio of older adults in a developing country. <b><i>Methods:</i></b> Three hundred and sixty community-dwelling older adults (aged 60-103 years) were recruited. Cognitive function was evaluated by the Instrument of Brief Neuropsychological Assessment and Mini-Mental State Examination inventory. Functional Activities Questionnaire was used to determine activities of daily living. Cytomegalovirus (CMV) and Epstein-Barr virus (EBV) serologies were determined by ELISAs. Peripheral blood was assessed for lymphocyte subsets by flow cytometry (CD4+, CD8+, NK, NKT, B and CD8+CD28-). <b><i>Results:</i></b> Fifty-nine individuals were identified with CD4:CD8 ratio <1, and had increased IgG titers to CMV (p < 0.01), but not to EBV, compared to subjects with CD4:CD8 ratio >1. The older adults with inverted CD4:CD8 ratio had impairments in some cognitive dimensions and had more functional disability and dependency (p = 0.01) than subjects with CD4:CD8 ratio >1. The lymphocyte subsets did not vary between groups. The increased CMV-IgG titers alone contributed to 8× higher chance to invert CD4:CD8 T cell ratio (OR 8.12, 95% CI 1.74-37.88, p < 0.01). <b><i>Conclusion:</i></b> Our data further indicate the role of CMV on circulating T cells, poor cognition and functional disability/dependency during aging." @default.
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• W1971439968 date "2014-01-01" @default.
• W1971439968 modified "2023-10-01" @default.
• W1971439968 title "The Inverted CD4:CD8 Ratio Is Associated with Cytomegalovirus, Poor Cognitive and Functional States in Older Adults" @default.
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• W1971439968 doi "https://doi.org/10.1159/000356827" @default.
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