Synergy effects of HbA1c and variants of APOE and BDNFVal66Met explains individual differences in memory performance.
We aimed at exploring if synergy effects of Brain-Derived Neurotrophic Factor (BDNF) Val(66)Met, Apolipoprotein E (APOE) and HbA1c (glycated haemoglobin) could explain individual differences in memory performance over 10 years in a population based sample of nondemented adults (N=888, 35-85 years at baseline). Episodic memory was affected by such agents, wheras semantic memory was spared. Both age and HbA1c were associated with episodic memory decline. BDNF(66)Met carriers with higher HbA1c levels evidenced slope decline in episodic recall. We found support for joint effects of BDNFVal(66)Met×APOE×HbA1c and BDNFVal(66)Met×APOE×age on rates of episodic memory change over ten years, after controlling for age, sex, education and cardiovascular diseases. We conclude that variants of genetic polymorphisms act in synergy with long-term blood glucose control in shaping patterns of cognitive aging.
Department of Psychology, Stockholm University, Sweden; Institute of Gerontology, Wayne State University, Detroit, MI, USA; Stockholm Brain Institute, Karolinska Institutet, Stockholm, Sweden. Electronic address: ninni.persson@psychology.su.se.
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Persson
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Lavebratt
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Wahlin
D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D001057:Apolipoproteins E / Q000235:genetics*; D019208:Brain-Derived Neurotrophic Factor / Q000235:genetics*; D005260:Female; D056726:Genetic Association Studies; D006442:Glycated Hemoglobin / Q000235:genetics*; D006801:Humans; D007206:Individuality; D008297:Male; D008568:Memory / Q000502:physiology*; D061212:Memory, Episodic; D008875:Middle Aged; D009483:Neuropsychological Tests; D020641:Polymorphism, Single Nucleotide
D001057:Apolipoproteins E; D019208:Brain-Derived Neurotrophic Factor; D006442:Glycated Hemoglobin; C517652:hemoglobin A1c protein, human
APOE; Aging; BDNF; Episodic memory; Epistasis; HbA1c