title: APOE ϵ4, rated life experiences, and affect among centenarians.
abstract: OBJECTIVE
  The purpose of this study was to assess the relationship between apolipoprotein E (APOE), life events and engagement, and subjective well-being (as measured by positive and negative affect) among centenarians. Based on the life stress paradigm, we predicted that higher levels of stress would allow APOE to influence positive and negative affect.
  
  
  METHODS
  196 centenarians and near-centenarians (98 years and older) of the Georgia Centenarian Study participated in this research. The APOE, positive and negative affect, the number of recent (last 2 years) and lifelong (more than 20 years prior to testing) events, as well as a number of life engagement tasks were assessed.
  
  
  RESULTS
  Results suggested that centenarians carrying the APOE ϵ4 allele rated lower in positive affect, the number of lifelong events, and in engaged lifestyle, when compared to centenarians without the APOE ϵ4 allele (t = 3.43, p < .01; t = 3.19, p < .01; and t = 2.33, p < .05, respectively). Blockwise multiple regressions indicated that the APOE ϵ4 predicted positive but not negative affect after controlling for demographics. Gene-environment interactions were obtained for the APOE ϵ4 and lifelong events, suggesting that carriers of the APOE ϵ4 allele had higher scores of negative affect after having experienced more events, whereas noncarriers had reduced negative affect levels after having experienced more events.
  
  
  CONCLUSIONS
  APOE ϵ4 is directly related to positive affect and is related to negative affect in interaction with life events.
authors.affiliation: a Department of Human Development and Family Studies , Iowa State University , Ames , IA , USA.
authors.forename: Peter
authors.initials: P
authors.lastname: Martin
authors.forename: S Michal
authors.initials: SM
authors.lastname: Jazwinski
authors.forename: Adam
authors.initials: A
authors.lastname: Davey
authors.forename: Robert C
authors.initials: RC
authors.lastname: Green
authors.forename: Maurice
authors.initials: M
authors.lastname: Macdonald
authors.forename: Jennifer A
authors.initials: JA
authors.lastname: Margrett
authors.forename: Ilene C
authors.initials: IC
authors.lastname: Siegler
authors.forename: Jonathan
authors.initials: J
authors.lastname: Arnold
authors.forename: John L
authors.initials: JL
authors.lastname: Woodard
authors.forename: Mary Ann
authors.initials: MA
authors.lastname: Johnson
authors.forename: Sangkyu
authors.initials: S
authors.lastname: Kim
authors.forename: Jianliang
authors.initials: J
authors.lastname: Dai
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.forename: Mark A
authors.initials: MA
authors.lastname: Batzer
authors.forename: Leonard W
authors.initials: LW
authors.lastname: Poon
authors.lastname: For The Georgia Centenarian Study
mesh_terms: D000339:Affect / Q000502:physiology*; D000369:Aged, 80 and over; D000375:Aging / Q000235:genetics / Q000523:psychology; D000483:Alleles; D053327:Apolipoprotein E4 / Q000235:genetics*; D005260:Female; D059647:Gene-Environment Interaction; D006801:Humans; D008016:Life Change Events; D008297:Male; D011788:Quality of Life / Q000523:psychology*
chemical_list: D053327:Apolipoprotein E4