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  • Title: Is the presenilin-1 E318G missense mutation a risk factor for Alzheimer's disease?
    Author: Helisalmi S, Hiltunen M, Mannermaa A, Koivisto AM, Lehtovirta M, Alafuzoff I, Ryynänen M, Soininen H.
    Journal: Neurosci Lett; 2000 Jan 07; 278(1-2):65-8. PubMed ID: 10643802.
    Abstract:
    Nearly all of the presenilin-1 (PSEN-1) mutations are missense mutations leading to Alzheimer's disease (AD). The role of the mutation E318G (a substitution of glutamic acid to glycine) in the PSEN-1 is controversial. It has been found both in AD patients and in non-demented control individuals. Using the polymerase chain reaction and the restriction fragment length polymorphism method, we screened for E318G mutation in a total of 16 familial (FAD) cases, in 64 sporadic neuropathologically confirmed AD cases and in 270 non-demented controls including 35 neuropathologically confirmed individuals. We detected the E318G mutation in four FAD cases, seven sporadic AD cases and 10 control individuals with highly varying onset-ages. Odds ratios for carrying the mutation were 7.6 and 3 in FAD and sporadic AD cases, respectively. Our results suggest that this mutation could be a risk factor in the Finnish FAD and sporadic AD population. It may be in linkage disequilibrium with a pathogenic change somewhere else in the PSEN-1 gene or in close proximity to the PSEN-1 gene.
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