4.7 Article

Associations between common arginine vasopressin 1b receptor and glucocorticoid receptor gene variants and HPA axis responses to psychosocial stress in a child psychiatric population

Journal

PSYCHIATRY RESEARCH
Volume 179, Issue 1, Pages 64-68

Publisher

ELSEVIER IRELAND LTD
DOI: 10.1016/j.psychres.2009.04.002

Keywords

Children; Genetic; Polymorphism

Categories

Funding

  1. University of Antwerp (UA)
  2. Fund for Scientific Research Flanders (FWO-F)
  3. National Fund for Scientific Research (FNRS)
  4. Belgian Science Policy Office [P5/19]

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On the one hand, a suitable response to daily stressors is crucial for adequate functioning in any natural environment. On the other hand, depending on the individual's genetic makeup, prolonged stress that is accompanied by an inappropriate level of responsiveness may lead to physiological and psychiatric disorders. Several psychiatric conditions have been linked with stress and alterations in hypothalamic-pituitary-adrenal (HPA) activity. While stress is a general phenomenon, illness is only seen in a proportion of individuals, suggesting that genetic factors may play a role in the ability to cope with stress. In children, relatively little research has been conducted to determine the impact of genetic factors on the variability in HPA axis functioning. In the present exploratory investigation, 106 prepubertal children were studied to estimate the impact of four glucocorticoid receptor gene (NR3C1) polymorphisms (NR3C1-1 [rs10482605], ER22/23EK [rs6190], N363S [rs6195], N766N [rs6196]) and five arginine vasopressin (AVP) receptor 1b gene (AVPR1b) polymorphisms (AVPR1b_s1 [rs28536160], AVPR1b_s2 [rs28373064], AVPR1b_s3 [rs33976516], AVPR1b_s4 [rs33985287], AVPR1b_s5 [rs33933482]) on cortisol responses after a psychosocial stress test (public speaking task). ER22/23EK carriers had significantly lower cortisol responses to psychosocial stress compared with noncarriers. These findings provide evidence for the relevance of the ER22/23EK polymorphism in childhood HPA axis regulation. However, the small number of ER22/23EK subjects does not allow us to draw definitive conclusions about the genotypic effect. (C) 2009 Elsevier Ireland Ltd. All rights reserved.

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