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  • Title: Glucocorticoid and mineralocorticoid receptor polymorphisms and clinical characteristics in bipolar disorder patients.
    Author: Spijker AT, Giltay EJ, van Rossum EF, Manenschijn L, DeRijk RH, Haffmans J, Zitman FG, Hoencamp E.
    Journal: Psychoneuroendocrinology; 2011 Nov; 36(10):1460-9. PubMed ID: 21531081.
    Abstract:
    INTRODUCTION: The hypothalamus-pituitary-adrenal (HPA)-axis is often found to be dysregulated in bipolar disorder (BD) while stress and changes in day-night rhythms can trigger a new mood episode. Genetic variants of the glucocorticoid receptor (GR)- and mineralocorticoid receptor (MR)-gene influence both the reactivity of the stress-response and associate with changes in mood. In this study we tested the hypothesis that these polymorphisms associate with different clinical characteristics of BD. METHODS: We studied 326 outpatients with BD and performed GR genotyping of the TthIIII, ER22/23EK, N363S, BclI, and 9β polymorphisms, as well as MR genotyping of the 2G/C and I180V variants. All patients were interviewed for clinical characteristics. RESULTS: Seasonal patterns of hypomania are related to the BclI haplotype and the TthIIII+9β haplotype of the GR gene (respectively, crude p=.007 and crude p=.005). Carriers of the ER22/23EK polymorphism had an almost 8 years earlier onset of their first (hypo)manic episode than non-carriers (crude p=.004, after adjustment p=.016). No evidence for a role of the MR in modifying clinical manifestations was found. CONCLUSION: Polymorphisms of the GR-gene are factors which influence some clinical manifestations of BD, with respect to seasonal pattern of (hypo)mania and age of onset.
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