The phenotypic associations and gene-environment underpinnings of socioeconomic status and diurnal cortisol secretion in adolescence

While converging evidence suggests that both environmental and genetic factors underlie variations in diurnal cortisol, the extent to which these sources of influence vary according to socioeconomic status (SES) has seldom been investigated, particularly in adolescence. To investigate whether a dist...

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Bibliographic Details
Published in:Development and psychopathology 2023-08, Vol.35 (3), p.1119-1129
Main Authors: Cantave, Christina Y, Brendgen, Mara, Paquin, Stéphane, Lupien, Sonia, Dionne, Ginette, Vitaro, Frank, Boivin, Michel, Ouellet-Morin, Isabelle
Format: Article
Language:English
Subjects:
Adolescence
Adolescent
Adolescents
Child development
Children
Circadian Rhythm - physiology
Cortisol
Diurnal
Environmental factors
Families & family life
Genetic diversity
Genetic factors
Hormones
Humans
Hydrocortisone
Hypothalamo-Hypophyseal System
Income
Influence
Pituitary-Adrenal System - physiology
Saliva
Secretion
Social Class
Socioeconomic factors
Socioeconomic status
Socioeconomics
Stress
Twins
Twins - genetics
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Summary:While converging evidence suggests that both environmental and genetic factors underlie variations in diurnal cortisol, the extent to which these sources of influence vary according to socioeconomic status (SES) has seldom been investigated, particularly in adolescence. To investigate whether a distinct genetic and environmental contribution to youth's diurnal cortisol secretion emerges according to family SES and whether the timing of these experiences matters. Participants were 592 twin pairs, who mostly came from middle-income and intact families and for whom SES was measured in childhood and adolescence. Diurnal cortisol was assessed at age 14 at awakening, 30 min later, in the afternoon and evening over four nonconsecutive days. SES-cortisol phenotypic associations were specific to the adolescence period. Specifically, higher awakening cortisol levels were detected in wealthier backgrounds, whereas higher cortisol awakening response (CAR) and diurnal changes were present at both ends of the SES continuum. Moreover, smaller genetic contributions emerged for awakening cortisol in youth from poorer compared to wealthier backgrounds. The results suggest that the relative contribution of inherited factors to awakening cortisol secretion may be enhanced or suppressed depending on the socio-family context, which may help to decipher the mechanisms underlying later adjustment.
ISSN:0954-5794
1469-2198
DOI:10.1017/S0954579421001048