Interaction between Poly(ADP-Ribose) Polymerase 1 and Interleukin 1A Genes Is Associated with Alzheimer’s Disease RiskInfante J. · Llorca J. · Mateo I. · Rodríguez-Rodríguez E. · Sánchez-Quintana C. · Sánchez-Juan P. · Fernández-Viadero C. · Peña N. · Berciano J. · Combarros O.
aNeurology Service, Marqués de Valdecilla University Hospital, University of Cantabria, bDivision of Preventive Medicine, University of Cantabria School of Medicine, and cRTE Santander, Consejería de Sanidad, Santander, Spain
Excessive release of proinflammatory cytokines by activated microglia surrounding senile plaques might contribute to the neurodegeneration associated with Alzheimer’s disease (AD). Poly(ADP-ribose) polymerase 1 (PARP-1) is a nuclear protein recently implicated in the initial inflammatory response by modulating expression of inflammation-related genes, like interleukin 1 (IL-1). As PARP-1 overactivity has been shown in the AD brain, we tested the hypothesis that the PARP-1 –410 and –1672 polymorphisms would predispose people to AD due to overexpression of the PARP-1 gene, independently or in concert with the proinflammatory IL-1A –889 polymorphism. So, we performed a case-control study in 263 Spanish AD patients and 293 healthy controls. PARP-1 –410 and PARP-1 –1672 haplotypes were associated with an increased risk for AD (global haplotype association p value = 0.019), and, in addition, PARP-1 haplotypes increased the risk of AD by interaction with the IL-1A –889 allele 2.
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