title: Apolipoprotein E: non-cognitive symptoms and cognitive decline in late onset Alzheimer's disease.
abstract: OBJECTIVE
  To determine the association between the epsilon2 and epsilon4 alleles of apolipoprotein E (ApoE) and independent measures of cognitive decline and non-cognitive symptomatology in late onset Alzheimer's disease.
  
  
  METHODS
  The frequency of the epsilon2 and epsilon4 alleles of ApoE and their association with measures of cognitive decline and non-cognitive symptomatology were assessed in a population based case register study of 164 patients with late onset Alzheimer's disease from the east Lambeth and south Southwark districts of south London.
  
  
  RESULTS
  Analysis of a wide range of non-cognitive symptoms against ApoE epsilon4 genotype showed no significant association but a positive relation was found between ApoE epsilon2 genotype and depressive symptomatology (P = 0.004). No relation was found between measurements of cognitive decline and the presence of the ApoE epsilon4 allele. A trend for decreasing age at onset of 3 to 4 years in carriers of the ApoE epsilon4 allele was found, confirming earlier studies.
  
  
  CONCLUSIONS
  Presence of the epsilon4 allele of ApoE is associated with an earlier age at onset but does not seem to be related to either a more severe psychopathology or a more rapid progression of the illness. The epsilon2 allele of ApoE is associated with depressive symptomatology in late onset Alzheimer's disease.
authors.affiliation: Section of Old Age Psychiatry, Institute of Psychiatry, Denmark Hill, London, UK.
authors.forename: C
authors.initials: C
authors.lastname: Holmes
authors.forename: R
authors.initials: R
authors.lastname: Levy
authors.forename: D M
authors.initials: DM
authors.lastname: McLoughlin
authors.forename: J F
authors.initials: JF
authors.lastname: Powell
authors.forename: S
authors.initials: S
authors.lastname: Lovestone
mesh_terms: D017668:Age of Onset; D000368:Aged; D000544:Alzheimer Disease / Q000235:genetics*; D001057:Apolipoproteins E / Q000235:genetics*; D003072:Cognition Disorders / Q000235:genetics*; D005260:Female; D006801:Humans; D008297:Male
chemical_list: D001057:Apolipoproteins E