Gene by Environment Interplay in Cognitive Aging

  • Chandra A. Reynolds
  • Deborah Finkel
  • Catalina Zavala
Chapter
Part of the Advances in Behavior Genetics book series (AIBG, volume 1)

Abstract

In this chapter, we reconsider existing theoretical models of Gene–Environment (GE) interplay and view them through the lens of a lifespan perspective, focusing on the shifting nature of the environments that impact cognitive function throughout adulthood. Existing evidence for GE interplay in cognitive aging is evaluated from this vantage point, including investigations that tap recent advances in genotyping and gene expression. The extent to which genetic factors are actually correlated with environments that provide more or less support for cognitive skills is unknown. However, educational and occupational attainment as well as leisure activities and exercise may reflect GE correlational processes that deserve further examination from a life course perspective. Emerging evidence is perhaps a bit more encouraging with respect to G × E processes: e.g., higher education and participation in leisure and physical activities may lower the risk of cognitive decline in those who already carry the APOE e4 risk allele. Familiality of methylation levels and telomere lengths, suggests that genetically driven differential sensitivities to environments (e.g., stress) may be important to individual differences in cognitive aging, but detailed investigations of specific environmental factors is minimal as yet. Large-scale efforts to study G × E influences on aging outcomes are underway, and predicted to contribute in important ways to the emerging literature on GE interplay using behavioral genetics and molecular methods.

Keywords

Cholesterol Depression Estrogen Covariance Dementia 

Notes

Acknowledgments

The authors gratefully acknowledge that a portion of this work was supported by the National Institutes of Aging (R01 AG037985).

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Copyright information

© Springer Science+Business Media, LLC 2014

Authors and Affiliations

  • Chandra A. Reynolds
    • 1
  • Deborah Finkel
    • 2
  • Catalina Zavala
    • 3
  1. 1.Department of PsychologyUniversity of California-RiversideRiversideUSA
  2. 2.School of Social SciencesIndiana UniversityNew AlbanyUSA
  3. 3.Department of PsychologyUniversity of California-RiversideRiversideUSA

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