Telomere length and early severe social deprivation: linking early adversity and cellular aging

被引:220
作者
Drury, S. S. [1 ]
Theall, K. [2 ]
Gleason, M. M. [1 ]
Smyke, A. T. [1 ]
De Vivo, I. [3 ]
Wong, J. Y. Y. [3 ]
Fox, N. A. [4 ]
Zeanah, C. H. [1 ]
Nelson, C. A. [5 ]
机构
[1] Tulane Univ, Dept Psychiat, New Orleans, LA 70118 USA
[2] Tulane Univ, Dept Community Hlth Sci, New Orleans, LA 70118 USA
[3] Harvard Univ, Harvard Sch Publ Hlth, Boston, MA 02115 USA
[4] Univ Maryland, Dept Human Dev, College Pk, MD 20742 USA
[5] Harvard Univ, Dept Pediat & Neurosci, Boston, MA 02115 USA
关键词
telomere; institutionalization; early childhood; gender; EARLY INTERVENTION PROJECT; GLUCOCORTICOID-RECEPTOR; PSYCHIATRIC-DISORDERS; EPIGENETIC REGULATION; ALZHEIMERS-DISEASE; COGNITIVE FUNCTION; ALLOSTATIC LOAD; CHILDREN; STRESS; GENE;
D O I
10.1038/mp.2011.53
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Accelerated telomere length attrition has been associated with psychological stress and early adversity in adults; however, no studies have examined whether telomere length in childhood is associated with early experiences. The Bucharest Early Intervention Project is a unique randomized controlled trial of foster care placement compared with continued care in institutions. As a result of the study design, participants were exposed to a quantified range of time in institutional care, and represented an ideal population in which to examine the association between a specific early adversity, institutional care and telomere length. We examined the association between average relative telomere length, telomere repeat copy number to single gene copy number (T/S) ratio and exposure to institutional care quantified as the percent of time at baseline (mean age 22 months) and at 54 months of age that each child lived in the institution. A significant negative correlation between T/S ratio and percentage of time was observed. Children with greater exposure to institutional care had significantly shorter relative telomere length in middle childhood. Gender modified this main effect. The percentage of time in institutional care at baseline significantly predicted telomere length in females, whereas the percentage of institutional care at 54 months was strongly predictive of telomere length in males. This is the first study to demonstrate an association between telomere length and institutionalization, the first study to find an association between adversity and telomere length in children, and contributes to the growing literature linking telomere length and early adversity. Molecular Psychiatry ( 2012) 17, 719-727; doi:10.1038/mp.2011.53; published online 17 May 2011
引用
收藏
页码:719 / 727
页数:9
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