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Journal of Aging Research
Volume 2011 (2011), Article ID 814096, 11 pages
http://dx.doi.org/10.4061/2011/814096
Review Article

Pathways to Aging: The Mitochondrion at the Intersection of Biological and Psychosocial Sciences

Department of Kinesiology and Physical Education, McGill University, 475 Pine Avenue, Montreal, QC, Canada H2W 1S4

Received 16 February 2011; Revised 11 May 2011; Accepted 11 July 2011

Academic Editor: Leonard W. Poon

Copyright © 2011 Martin Picard. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Compelling evidence suggests that both biological and psychosocial factors impact the process of aging. However, our understanding of the dynamic interplay among biological and psychosocial factors across the life course is still fragmentary. For example, it needs to be established how the interaction of individual factors (e.g., genetic and epigenetic endowment and personality), behavioral factors (e.g., physical activity, diet, and stress management), and psychosocial experiences (e.g., social support, well-being, socioeconomic status, and marriage) in perinatal, childhood, and adulthood influence health across the aging continuum. This paper aims to outline potential intersection points serving as an interface between biological and psychosocial factors, with an emphasis on the mitochondrion. Mitochondria are cellular organelles which play a critical role in cellular senescence. Both chronic exposure to psychosocial stress and genetic-based mitochondrial dysfunction have strikingly similar biological consequences; both predispose individuals to adverse age-related health disorders and early mortality. Exploring the interactive nature of the factors resulting in pathways to normal healthy aging, as well as those leading to morbidity and early mortality, will continue to enhance our ability to translate research into effective practices that can be implemented throughout the life course to optimise the aging process.