TOMM40 poly-T Variants and Cerebrospinal Fluid Amyloid Beta Levels in the Elderly
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- Pomara, N., Bruno, D., Nierenberg, J.J. et al. Neurochem Res (2011) 36: 1124. doi:10.1007/s11064-011-0459-5
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A variable poly-T polymorphism in the TOMM40 gene, which is in linkage disequilibrium with APOE, was recently implicated with increased risk and earlier onset age for late-onset Alzheimer’s disease in APOE ε3 carriers. To elucidate potential neurobiological mechanisms underlying this association, we compared the effect of TOMM40 poly-T variants to the effect of APOE, an established LOAD-risk modulator, on cerebrospinal fluid (CSF) amyloid beta (Aβ) and tau levels, in cognitively intact elderly subjects. APOE ε4 carriers showed significant reductions in Aβ 1-42 levels compared to non-ε4 carriers, but no differences were detected across TOMM40 variants. Neither Aβ 1-40 nor tau levels were affected by APOE or TOMM40.