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Region Hovedstaden - en del af Københavns Universitetshospital
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Hair Cortisol in Twins: Heritability and Genetic Overlap with Psychological Variables and Stress-System Genes

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

DOI

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  • CORtisolNETwork (CORNET) Consortium
  • Psychiatric Genomics Consortium (PGC)
  • Thomas Mears Werge (Medlem af forfattergruppering)
Vis graf over relationer

Hair cortisol concentration (HCC) is a promising measure of long-term hypothalamus-pituitary-adrenal (HPA) axis activity. Previous research has suggested an association between HCC and psychological variables, and initial studies of inter-individual variance in HCC have implicated genetic factors. However, whether HCC and psychological variables share genetic risk factors remains unclear. The aims of the present twin study were to: (i) assess the heritability of HCC; (ii) estimate the phenotypic and genetic correlation between HPA axis activity and the psychological variables perceived stress, depressive symptoms, and neuroticism; using formal genetic twin models and molecular genetic methods, i.e. polygenic risk scores (PRS). HCC was measured in 671 adolescents and young adults. These included 115 monozygotic and 183 dizygotic twin-pairs. For 432 subjects PRS scores for plasma cortisol, major depression, and neuroticism were calculated using data from large genome wide association studies. The twin model revealed a heritability for HCC of 72%. No significant phenotypic or genetic correlation was found between HCC and the three psychological variables of interest. PRS did not explain variance in HCC. The present data suggest that HCC is highly heritable. However, the data do not support a strong biological link between HCC and any of the investigated psychological variables.

OriginalsprogEngelsk
TidsskriftScientific Reports
Vol/bind7
Udgave nummer1
Sider (fra-til)15351
ISSN2045-2322
DOI
StatusUdgivet - 10 nov. 2017

ID: 52691027