Pilot Study of Second-Generation DNA Methylation Epigenetic Markers in Relation to Cognitive and Neuropsychiatric Symptoms in Older Adults

Chirag M. Vyas, Ruslan I. Sadreyev, Jennifer R. Gatchel, Jae H. Kang, Charles F. Reynolds, David Mischoulon, Grace Chang, Aditi Hazra, Joann E. Manson, Deborah Blacker, Immaculata De Vivo, Olivia I. Okereke

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Background: Associations between epigenetic aging with cognitive aging and neuropsychiatric measures are not well-understood. Objective: 1) To assess cross-sectional correlations between second-generation DNA methylation (DNAm)-based clocks of healthspan and lifespan (i.e., GrimAge, PhenoAge, and DNAm-based estimator of telomere length [DNAmTL]) and cognitive and neuropsychiatric measures; 2) To examine longitudinal associations between change in DNAm markers and change in cognition over 2 years. Methods: Participants were members of VITAL-DEP (VITamin D and OmegA-3 TriaL-Depression Endpoint Prevention) study. From previously ascertained cognitive groups (i.e., cognitively normal and mild cognitive impairment), we randomly selected 45 participants, aged≥60 years, who completed in-person neuropsychiatric assessments at baseline and 2 years. The primary outcome was global cognitive score (averaging z-scores of 9 tests). Neuropsychiatric Inventory severity scores were mapped from neuropsychiatric symptoms (NPS) from psychological scales and structured diagnostic interviews. DNAm was assayed using Illumina MethylationEPIC 850K BeadChip at baseline and 2 years. We calculated baseline partial Spearman correlations between DNAm markers and cognitive and NPS measures. We constructed multivariable linear regression models to examine longitudinal relations between DNAm markers and cognition. Results: At baseline, we observed a suggestive negative correlation between GrimAge clock markers and global cognition but no signal between DNAm markers and NPS measures. Over 2 years: each 1-year increase in DNAmGrimAge was significantly associated with faster declines in global cognition; each 100-base pair increase in DNAmTL was significantly associated with better global cognition. Conclusion: We found preliminary evidence of cross-sectional and longitudinal associations between DNAm markers and global cognition.

Original languageEnglish
Pages (from-to)1563-1575
Number of pages13
JournalJournal of Alzheimer's Disease
Volume93
Issue number4
DOIs
StatePublished - 13 Jun 2023
Externally publishedYes

Keywords

  • Alzheimer's disease
  • DNA methylation
  • cognition
  • epigenetics
  • neuropsychiatric symptoms

Fingerprint

Dive into the research topics of 'Pilot Study of Second-Generation DNA Methylation Epigenetic Markers in Relation to Cognitive and Neuropsychiatric Symptoms in Older Adults'. Together they form a unique fingerprint.

Cite this