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Cognitive decline and the PPAR-? Pro12Ala genotype: variation by sex and ethnicity.

ABSTRACT: Objective:We investigated the association between the peroxisome proliferator-activated receptor (PPAR)-gamma Pro12Ala polymorphism and cognitive decline in older adults. Methods:Participants from a population-based cohort of older Hispanic and non-Hispanic white adults (n = 492) were administered the Mini Mental State Examination (MMSE), a multi-domain cognitive screening tool, and the Behavioral Dyscontrol Scale (BDS), a measure of executive cognitive function, at baseline and at follow-up, an average of 22 months later. Multiple linear regression was used to investigate the association between the two cognitive test scores and the Pro12Ala polymorphism. Results:At baseline, presence of the Ala12 allele was not significantly associated with MMSE score (P = 0.62) nor with BDS score (P = 0.85). Heterogeneity was present for cognitive decline as measured by the MMSE among ethnic, sex and Ala12 allele status (P = 0.04 for three-way interaction term). Stratification by the cross-classification of sex and ethnicity revealed significantly greater declines in MMSE score among male Hispanic carriers of the Ala12 allele compared to male Hispanic non-carriers (decline = 4.0 versus 1.6 points; P = 0.02). A significant difference in decline between Ala12 carriers and non-carriers was not present among the other sex/ethnic groups. Conclusions:Carriers of the PPAR-? Ala12 allele showed greater cognitive decline compared to non-carriers as detected by the MMSE but the risk varied across sex and ethnic groups. Male Ala12 carriers of Hispanic origin may be a high-risk group for cognitive decline.

SUBMITTER: West NA

PROVIDER: S-EPMC6396745 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature

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Cognitive decline and the PPAR-γ Pro12Ala genotype: variation by sex and ethnicity.

West Nancy A NA Baxter Judith J Bryant Lucinda L LL Nelson Tracy L TL

Age and ageing 20170101 1

<h4>Objective</h4>We investigated the association between the peroxisome proliferator-activated receptor (PPAR)-gamma Pro12Ala polymorphism and cognitive decline in older adults.<h4>Methods</h4>Participants from a population-based cohort of older Hispanic and non-Hispanic white adults (n = 492) were administered the Mini Mental State Examination (MMSE), a multi-domain cognitive screening tool, and the Behavioral Dyscontrol Scale (BDS), a measure of executive cognitive function, at baseline and a ...[more]

PMID: 28181642

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Cognitive decline and the PPAR-? Pro12Ala genotype: variation by sex and ethnicity.

Publications

Cognitive decline and the PPAR-γ Pro12Ala genotype: variation by sex and ethnicity.

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