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Alzheimers Dement. 2013 Sep;9(5):554-61. doi: 10.1016/j.jalz.2012.06.009. Epub 2012 Nov 22.

TOMM40 intron 6 poly-T length, age at onset, and neuropathology of AD in individuals with APOE ε3/ε3.

Author information

1
Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle, WA, USA. gli@u.washington.edu

Abstract

BACKGROUND:

This study investigates the association between TOMM40 poly-T length, age at onset, and neuropathology in individuals with Alzheimer's disease (AD) with the apolipoprotein E (APOE) ε3/ε3 allele.

METHODS:

Thirty-two presenilin 1 (PSEN1) mutation carriers with AD, 27 presenilin 2 (PSEN2) mutation carriers with AD, 59 participants with late-onset AD (LOAD), and 168 autopsied subjects from a community-based cohort were genotyped for TOMM40 intron 6 poly-T (rs10524523) length using short tandem repeat assays.

RESULTS:

Among AD individuals with PSEN2 mutations, the presence of a long poly-T was associated with an earlier age at onset, whereas there were no such associations for subjects with PSEN1 mutations or LOAD. In community-based participants, the presence of a long poly-T was associated with increased neuritic tangles and a greater likelihood of pathologically diagnosed AD.

CONCLUSION:

TOMM40 intron 6 poly-T length may explain some of the variation in age at onset in PSEN2 familial AD and may be associated with AD neuropathology in persons with APOE ε3/ε3.

KEYWORDS:

APOE; Age at onset; Alzheimer’s disease; Genetic; Neuropathology; PSEN1 mutation; PSEN2 mutation; TOMM40

PMID:
23183136
PMCID:
PMC3606272
DOI:
10.1016/j.jalz.2012.06.009
[Indexed for MEDLINE]
Free PMC Article

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