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Tan, Z S; Beiser, A S; Vasan, R S; Roubenoff, R; Dinarello, C A; Harris, T B; Benjamin, E J; Au, R; Kiel, D P; Wolf, P A; Seshadri, S
Neurology, 05/2007, Volume: 68, Issue: 22Journal Article
To examine whether serum cytokines and spontaneous production of peripheral blood mononuclear cell (PBMC) cytokines are associated with the risk of incident Alzheimer disease (AD). We followed 691 cognitively intact community-dwelling participants (mean age 79 years, 62% women) and related PBMC cytokine production (tertiles of spontaneous production of interleukin 1 IL-1, IL-1 receptor antagonist, and tumor necrosis factor alpha TNF-alpha) and serum C-reactive protein and interleukin 6 (IL-6) to the risk of incident AD. Adjusting for clinical covariates, individuals in the top two tertiles (T2 and T3) of PBMC production of IL-1 or the top tertile (T3) of PBMC production of TNF-alpha were at increased risk of developing AD (multivariable-adjusted hazard ratio HR for IL-1 T2 = 2.84, 95% CI 1.09 to 7.43; p = 0.03 and T3 = 2.61, 95% CI 0.96 to 7.07; p = 0.06; for TNF-alpha, adjusted HR for T2 = 1.30, 95% CI 0.53 to 3.17; p = 0.57 and T3 = 2.59, 95% CI 1.09 to 6.12; p = 0.031) compared with those in the lowest tertile (T1). Higher spontaneous production of interleukin 1 or tumor necrosis factor alpha by peripheral blood mononuclear cells may be a marker of future risk of Alzheimer disease (AD) in older individuals. These data strengthen the evidence for a pathophysiologic role of inflammation in the development of clinical AD.
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