title: Candidate gene analysis of semaphorins in patients with Alzheimer's disease.
abstract: Semaphorins of the SemaIV family are expressed in neurons and decreased in brains from patients with Alzheimer's disease (AD). Accumulation of an internalized form of Sema3A is associated with degeneration of neurons, making these molecules candidates for the development of AD. Single nucleotide polymorphisms (SNPs) rs36026860 and rs28469467 in Sema3A as well as rs13284404 and rs11526468 in Sema4D were analyzed in a population of 240 patients with AD compared with 222 age-matched controls. None of SNPs in Sema3A were present, either in patients or controls. The distribution of the Sema4D rs11526468 and rs13284404 SNPs was not significantly different between patients and controls, even stratifying for gender or age at onset. In silico analysis predicted that rs11526468 and rs28469467 are probably damaging. This high degree of conservation of Sema3A suggests a very important role for this protein. However, neither Sema3A nor Sema4D likely influence the susceptibility to AD.
authors: Department of Neurological Sciences, Dino Ferrari Center, University of Milan, IRCCS Fondazione Ospedale Maggiore Policlinico, Milan, Italy.
authors: Chiara
authors: C
authors: Villa
authors: Eliana
authors: E
authors: Venturelli
authors: Chiara
authors: C
authors: Fenoglio
authors: Milena
authors: M
authors: De Riz
authors: Diego
authors: D
authors: Scalabrini
authors: Francesca
authors: F
authors: Cortini
authors: Maria
authors: M
authors: Serpente
authors: Claudia
authors: C
authors: Cantoni
authors: Nereo
authors: N
authors: Bresolin
authors: Elio
authors: E
authors: Scarpini
authors: Daniela
authors: D
authors: Galimberti
mesh_terms: D017668:Age of Onset; D000368:Aged; D000544:Alzheimer Disease / Q000235:genetics*; D015703:Antigens, CD / Q000235:genetics*; D053327:Apolipoprotein E4 / Q000235:genetics; D016022:Case-Control Studies; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D006239:Haplotypes; D006801:Humans; D008297:Male; D010641:Phenotype; D020641:Polymorphism, Single Nucleotide; D040121:Semaphorin-3A / Q000235:genetics*; D039961:Semaphorins / Q000235:genetics*; D017422:Sequence Analysis, DNA; D012737:Sex Factors; D013997:Time Factors
chemical_list: D015703:Antigens, CD; D053327:Apolipoprotein E4; C093224:CD100 antigen; C108639:SEMA3A protein, human; D040121:Semaphorin-3A; D039961:Semaphorins