No evidence for genetic association or linkage of the cathepsin D (CTSD) exon 2 polymorphism and Alzheimer disease.

Abstract:

:Two recent case-control studies have suggested a strong association of a missense polymorphism in exon 2 of the cathepsin D gene (CTSD) and Alzheimer disease (AD). However, these findings were not confirmed in another independent study. We analyzed this polymorphism in two large and independent AD study populations and did not detect an association between CTSD and AD. The first sample was family-based and included 436 subjects from 134 sibships discordant for AD that were analyzed using the sibship disequilibrium test (SDT, p = 0.68) and the sib transmission/disequilibrium test (Sib-TDT, p = 0.81). The second sample of 200 AD cases and 182 cognitively normal controls also failed to show significant differences in the allele or genotype distribution in cases versus controls (chi2, p = 0.91 and p = 0.88, respectively). In addition, two-point linkage analyses in an enlarged family sample (n = 670) did not show evidence for linkage of the chromosomal region around CTSD. Thus, our analyses on more than 800 subjects suggest that if an association between the CTSD exon 2 polymorphism and AD exists, it is likely to be smaller than previously reported.

journal_name

Ann Neurol

journal_title

Annals of neurology

authors

Bertram L,Guénette S,Jones J,Keeney D,Mullin K,Crystal A,Basu S,Yhu S,Deng A,Rebeck GW,Hyman BT,Go R,McInnis M,Blacker D,Tanzi R

doi

10.1002/1531-8249(200101)49:1<114::aid-ana18>3.0.c

keywords:

subject

Has Abstract

pub_date

2001-01-01 00:00:00

pages

114-6

issue

1

eissn

0364-5134

issn

1531-8249

journal_volume

49

pub_type

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