Early-life socioeconomic disadvantage, not current, predicts accelerated epigenetic aging of monocytes

Psychoneuroendocrinology
Makeda K AustinGregory E Miller

Abstract

Low socioeconomic status (SES) in early-life and adulthood independently contribute to increased risk for aging-related chronic diseases. One mechanistic hypothesis for these associations involves faster cellular aging of immune cells, which could plausibly contribute to chronic disease pathogenesis by compromising host resistance and/or up-regulating inflammation. However, little is known about the association between life-course SES and cellular aging. The present study examines the association of early-life and current SES with a novel biomarker of cellular aging termed the "epigenetic clock," in monocytes. Additionally, we examine health behaviors and depressive symptoms as potential explanatory pathways. The study involved 335 participants between the ages of 15 and 55 from Vancouver, Canada and surrounding areas. Enrolled participants had to fit into four life-course SES trajectories, corresponding to low-low, low-high, high-low and high-high combinations of early-life (ages 0 to 5) and current SES respectively. Cellular aging of monocytes was measured using Horvath's DNA methylation derived measure of epigenetic age acceleration. Results indicated that socioeconomic disadvantage during early-life, but not later in life, ...Continue Reading

Citations

Aug 25, 2020·Psychosomatic Medicine·Margaret H BublitzGhada Bourjeily
Apr 20, 2019·The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences·Joanne RyanRobyn L Woods
Jun 27, 2020·Laryngoscope Investigative Otolaryngology·Gregory W Randolph
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Aug 13, 2021·Stress and Health : Journal of the International Society for the Investigation of Stress·Sibel NaymanHannah M C Schreier

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