CD8+ T-cells count in acute myocardial infarction in HIV disease in a predominantly male cohort.

Badejo OA, Chang CC, So-Armah KA, Tracy RP, Baker JV, Rimland D, Butt AA, Gordon AJ, Rinaldo CR, Kraemer K, Samet JH, Tindle HA, Goetz MB, Rodriguez-Barradas MC, Bedimo R, Gibert CL, Leaf DA, Kuller LH, Deeks SG, Justice AC, Freiberg MS. CD8+ T-cells count in acute myocardial infarction in HIV disease in a predominantly male cohort. BioMed research international. 2015 Jan 19; 2015:246870.

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Abstract:

Human Immunodeficiency Virus- (HIV-) infected persons have a higher risk for acute myocardial infarction (AMI) than HIV-uninfected persons. Earlier studies suggest that HIV viral load, CD4+ T-cell count, and antiretroviral therapy are associated with cardiovascular disease (CVD) risk. Whether CD8+ T-cell count is associated with CVD risk is not clear. We investigated the association between CD8+ T-cell count and incident AMI in a cohort of 73,398 people (of which 97.3% were men) enrolled in the U.S. Veterans Aging Cohort Study-Virtual Cohort (VACS-VC). Compared to uninfected people, HIV-infected people with high baseline CD8+ T-cell counts ( > 1065?cells/mm3) had increased AMI risk (adjusted HR = 1.82, P < 0.001, 95% CI: 1.46 to 2.28). There was evidence that the effect of CD8+ T-cell tertiles on AMI risk differed by CD4+ T-cell level: compared to uninfected people, HIV-infected people with CD4+ T-cell counts = 200?cells/mm3 had increased AMI risk with high CD8+ T-cell count, while those with CD4+ T-cell counts < 200?cells/mm3 had increased AMI risk with low CD8+ T-cell count. CD8+ T-cell counts may add additional AMI risk stratification information beyond that provided by CD4+ T-cell counts alone.