|Title||Plasma phospholipid very-long-chain SFAs in midlife and 20-year cognitive change in the Atherosclerosis Risk in Communities (ARIC): a cohort study.|
|Publication Type||Journal Article|
|Year of Publication||2020|
|Authors||Li D, Misialek JR, Jing M, Tsai MY, Eckfeldt JH, Steffen LM, Knopman D, Wruck L, Gottesman R, Mosley TH, Sharrett ARichey|
|Secondary Authors||Alonso A|
|Journal||Am J Clin Nutr|
|Date Published||2020 06 01|
|Keywords||Aged, Atherosclerosis, Cognition, Cognition Disorders, Cohort Studies, Eicosanoic Acids, Fatty Acids, Fatty Acids, Unsaturated, Female, Humans, Longitudinal Studies, Middle Aged, Phospholipids, Prospective Studies|
BACKGROUND: Very-long-chain SFAs (VLSFAs) have recently gained considerable attention as having beneficial effects on health and aging.
OBJECTIVES: The objective of this study was to assess the associations of plasma phospholipid VLSFAs [arachidic acid (20:0), behenic acid (22:0), tricosanoic acid (23:0), and lignoceric acid (24:0)] with 20-y cognitive decline in the Atherosclerosis Risk in Communities (ARIC) participants. Furthermore, this study compared the associations of plasma phospholipid VLSFAs with 5 common groups of fatty acids [i.e., total SFAs, total MUFAs, total ω-3 (n-3) PUFAs, total marine-derived ω-3 PUFAs, total ω-6 PUFAs].
METHODS: This study used a cohort study design of 3229 ARIC participants enrolled at the Minnesota field center. Fatty acids were measured at visit 1 (1987-1989); and cognition was assessed at visits 2 (1990-1992), 4 (1996-1998), and 5 (2011-2013) using 3 tests: the Delayed Word Recall Test (DWRT), the Digit-Symbol Substitution Test (DSST), and the Word Fluency Test (WFT).
RESULTS: Higher proportions of plasma phospholipid total VLSFAs and each individual VLSFA were associated with less decline in WFT, a test of verbal fluency. For example, 1 SD higher in total VLSFAs at baseline was associated with 0.057 SD (95% CI: 0.018, 0.096, P = 0.004) less cognitive decline over 20 y as measured by WFT score. None of the 5 common fatty acid groups were associated with change in WFT, but a higher proportion of plasma phospholipid total MUFAs was associated with greater decline in DWRT; higher total ω-6 PUFAs with less decline in DWRT; and higher total ω-3 and total marine-derived ω-3 PUFAs with less decline in DSST.
CONCLUSIONS: This study suggests that higher proportions of plasma phospholipid VLSFAs in midlife may be associated with less 20-y cognitive decline.
|Alternate Journal||Am J Clin Nutr|
|PubMed Central ID||PMC7266687|
|Grant List||U01 HL096812 / HL / NHLBI NIH HHS / United States|