title: An age effect on the association of common variants of ACE with Alzheimer's disease.
abstract: It is now well established that vascular risk factors are associated with cognitive performances. The renin-angiotensin system (RAS) components, major determinants of the cardiovascular system, are expressed in the brain and were shown to play a role on amyloid metabolism, learning and memory. The angiotensin-converting enzyme (ACE), a pivotal RAS protein, is encoded by a huge gene containing many variants, one of them, the I/D variant (rs1799752), being associated with Alzheimer's disease (AD). Other variants, such as SNPs rs4291A>T located -240bp from the initiation codon, and rs4343G>A encoding a silent mutation in exon 16, were inconsistently associated with the risk of AD. In a case-control study including 376 late-onset AD patients and 444 control subjects, we showed a statistically significant effect on the risk of AD of two variants (rs4343 and rs1799752) and of the haplotype ATI (rs4343/rs4291/rs1799752) in subjects aged 73 years and above.
authors.affiliation: Univ Lille Nord de France, F-59000 Lille, France.
authors.forename: Nicole
authors.initials: N
authors.lastname: Helbecque
authors.forename: Valerie
authors.initials: V
authors.lastname: Codron
authors.forename: Dominique
authors.initials: D
authors.lastname: Cottel
authors.forename: Philippe
authors.initials: P
authors.lastname: Amouyel
mesh_terms: D000367:Age Factors; D017668:Age of Onset; D000368:Aged; D000544:Alzheimer Disease / Q000235:genetics*; D016022:Case-Control Studies; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006239:Haplotypes; D006801:Humans; D008297:Male; D011110:Polymorphism, Genetic; D012083:Renin / Q000235:genetics*; D044465:White People
chemical_list: D012083:Renin