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Article Abstract
The stress-response, including autonomic and hypothalamic-pituitary-adrenal (HPA) axis reactivity, is essential for maintaining homeostasis during a challenge. Brain mineralocorticoid receptors and glucocorticoid receptors operate in balance to coordinate the stress-response. Genetic variants in both the human mineralocorticoid and glucocorticoid receptor-genes have been functionally characterized. In vitro effects of these genetic variants on transactivation and mRNA stability have been described. In vivo, two mineralocorticoid receptor-gene SNPs (-2 G/C (allele frequency: 50%), MR I180V (11%)) and four glucocorticoid receptor-gene SNPs (ER22/23EK (3%), N363S (4%), BclI (37%), A3669G (15%)) are associated with changes in hypothalamic-pituitary-adrenal (HPA) axis reactivity. Importantly, the two mineralocorticoid receptor-gene variants (but none of the glucocorticoid receptor-gene variants) also associate with changes in autonomic output as measured as increased heart beat following a psychosocial stress (TSST). Moreover, several of these mineralocorticorticoid receptor- and glucocorticoid receptor variants have been found associated with stress-related disorders, including depression. These data indicate that dysregulation of mineralocorticoid- and glucocorticoid receptor are causative in the pathogenesis of depression. Moreover, these mineralocorticoid- and glucocorticoid receptor-gene variants constitute part of the genetic make up that determines individual stress-responsiveness inducing vulnerability to disease. Furthermore, mineralocorticoid- and glucocorticoid receptors are drug targets, thereby aiming at the underlying mechanisms of stress-related disorders.
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| http://dx.doi.org/10.1016/j.ejphar.2008.03.012 | DOI Listing |
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