02680nas a2200313 4500008004100000022001400041245010100055210006900156260001300225300001100238490000800249520179500257653005102052653000902103653002202112653001302134653001102147653001102158653000902169653000902178653001702187100002802204700002502232700001802257700002002275700001902295700001602314856003602330 2014 eng d a1879-148400aLipoprotein-associated phospholipase A2 and risk of dementia in the Cardiovascular Health Study.0 aLipoproteinassociated phospholipase A2 and risk of dementia in t c2014 Aug a384-910 v2353 a

OBJECTIVE: To evaluate associations between Lipoprotein-associated phospholipase A2 (Lp-PLA2) mass and activity with risk of dementia and its subtypes.

METHODS: Analysis were completed on 3320 participants of the Cardiovascular Health Study (CHS), a population-based longitudinal study of community-dwelling adults age ≥65 years followed for an average of 5.4 years. Baseline serum Lp-PLA2 mass was measured using a sandwich enzyme immunoassay and Lp-PLA2 activity utilized a tritiated-platelet activating factor activity assay. Cox proportional hazards regression assessed the relative risk of incident dementia with higher baseline Lp-PLA2 adjusting for demographics, cardiovascular disease (CVD) and risk factors, inflammation markers and apolipoprotein E (APOE) genotype.

RESULTS: Each standard deviation higher Lp-PLA2 mass and activity were related to increased risk of dementia (fully adjusted HR: 1.11 per SD, 95% CI: 1.00-1.24 for mass; HR: 1.12 per SD, 95% CI: 1.00-1.26 for activity). Persons in the highest quartile of Lp-PLA2 mass were 50% more likely to develop dementia than those in the lowest quartile in adjusted models (HR: 1.49; 95% CI: 1.08-2.06). Among dementia subtypes, the risk of AD was increased two-fold in the highest compared to lowest quartile of Lp-PLA2 mass (adjusted HR: 1.98, 95% CI: 1.22-3.21). Results were attenuated in models of mixed dementia and VaD. Lp-PLA2 activity also doubled the risk of mixed dementia in the highest compared to lowest quartile (HR: 2.21, 95% CI: 1.12-4.373).

INTERPRETATION: These data support Lp-PLA2 as a risk factor for dementia independent of CVD and its risk factors. Further study is required to clarify the role of Lp-PLA2-related mechanisms in dementia subtypes.

10a1-Alkyl-2-acetylglycerophosphocholine Esterase10aAged10aAlzheimer Disease10aDementia10aFemale10aHumans10aMale10aRisk10aRisk Factors1 aFitzpatrick, Annette, L1 aIrizarry, Michael, C1 aCushman, Mary1 aJenny, Nancy, S1 aChi, Gloria, C1 aKoro, Carol uhttps://chs-nhlbi.org/node/6380