title: Association of the apolipoprotein E epsilon4 allele with late-onset depression.
abstract: Apolipoprotein E (ApoE) phenotyping was determined in 42 subjects with Alzheimer's disease (AD), 49 with depression, including 26 with early-onset depression (EOD) and 23 with late-onset depression (LOD), and 49 controls. In the EOD group, the frequency of the ApoE epsilon4 allele was not different from the control frequency (p = 0.532) but was significantly lower than in AD (p < 0.001). In the LOD group, the ApoE epsilon4 frequency was significantly higher than in the controls (p = 0.034) but was not different from that in the AD group (p = 0.229). Individuals with ApoE epsilon4 were at greater risk of getting AD (odds ratio, OR = 5.5, 95% confidence interval, CI, 2.0-14.0) or LOD (OR = 6.1, 95% CI, 1.9-19.0) than of EOD (OR = 0.7, 95% CI, 0.2-2.5). These results suggest an association between the ApoE epsilon4 allele frequency and LOD. Patients with LOD could be at risk of developing AD by an epsilon4-dependent pathway.
authors.affiliation: Hôpital Broca, CHU Cochin Port-Royal, Université René-Descartes, Paris V 54/56, rue Pascal, F-75013 Paris, France. anne-sophie.rigaud@brc.ap-hop-paris.fr
authors.forename: A S
authors.initials: AS
authors.lastname: Rigaud
authors.forename: L
authors.initials: L
authors.lastname: Traykov
authors.forename: L
authors.initials: L
authors.lastname: Caputo
authors.forename: J
authors.initials: J
authors.lastname: Coste
authors.forename: F
authors.initials: F
authors.lastname: Latour
authors.forename: R
authors.initials: R
authors.lastname: Couderc
authors.forename: F
authors.initials: F
authors.lastname: Moulin
authors.forename: F
authors.initials: F
authors.lastname: Boller
authors.forename: F
authors.initials: F
authors.lastname: Forette
mesh_terms: D017668:Age of Onset; D000368:Aged; D000544:Alzheimer Disease / Q000235:genetics / Q000473:pathology; D053327:Apolipoprotein E4; D001057:Apolipoproteins E / Q000235:genetics*; D016022:Case-Control Studies; D003866:Depressive Disorder / Q000235:genetics* / Q000473:pathology; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D006801:Humans; D008297:Male; D008875:Middle Aged; D010641:Phenotype; D012307:Risk Factors
chemical_list: D053327:Apolipoprotein E4; D001057:Apolipoproteins E