Functional TSPO polymorphism predicts variance in the diurnal cortisol rhythm in bipolar disorder.

Autor: Prossin AR; Department of Psychiatry, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, USA; Houston Methodist Research Institute, Houston, TX, USA. Electronic address: alan.prossin@uth.tmc.edu., Chandler M; Department of Psychiatry, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, USA., Ryan KA; Department of Psychiatry, University of Michigan Medical School, Ann Arbor, MI, USA., Saunders EF; Department of Psychiatry, University of Michigan Medical School, Ann Arbor, MI, USA; Department of Psychiatry, Medical School, Penn State College of Medicine and the Milton S. Hershey Medical Center, Hershey, PA, USA., Kamali M; Department of Psychiatry, University of Michigan Medical School, Ann Arbor, MI, USA; Department of Psychiatry, Massachusetts General Hospital, Boston, MA, USA., Papadopoulos V; School of Pharmacy, University of Southern California, Los Angeles, CA, USA., Zöllner S; Department of Psychiatry, University of Michigan Medical School, Ann Arbor, MI, USA., Dantzer R; Department of Symptom Research, Division of Internal Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA., McInnis MG; Department of Psychiatry, University of Michigan Medical School, Ann Arbor, MI, USA.
Jazyk: angličtina
Zdroj: Psychoneuroendocrinology [Psychoneuroendocrinology] 2018 Mar; Vol. 89, pp. 194-202. Date of Electronic Publication: 2018 Jan 31.
DOI: 10.1016/j.psyneuen.2018.01.013
Abstrakt: Introduction: Psychosocial stress contributes to onset/exacerbation of mood episodes and alcohol use, suggesting dysregulated diurnal cortisol rhythms underlie episodic exacerbations in Bipolar Disorder (BD). However, mechanisms underlying dysregulated HPA rhythms in BD and alcohol use disorders (AUD) are understudied. Knowledge of associated variance factors have great clinical translational potential by facilitating development of strategies to reduce stress-related relapse in BD and AUD. Evidence suggests structural changes to mitochondrial translocator protein (TSPO) (a regulator of steroid synthesis) due to the single nucleotide polymorphism rs6971, may explain much of this variance. However, whether rs6971 is associated with abnormal HPA rhythms and clinical exacerbation in humans is unknown.
Methods: To show this common TSPO polymorphism impacts HPA rhythms in BD, we tested whether rs6971 (dichotomized: presence/absence of polymorphism) predicted variance in diurnal cortisol rhythm (saliva: morning and evening for 3 days) in 107 BD (50 with and 57 without AUD) and 28 healthy volunteers of similar age and ethno-demographic distribution.
Results: Repeated measures ANOVA confirmed effects BD (F 5,525  = 3.0, p = 0.010) and AUD (F 5,525  = 2.9, p = 0.012), but not TSPO polymorphism (p > 0.05). Interactions were confirmed for TSPO × BD (F 5,525  = 3.9, p = 0.002) and for TSPO × AUD (F 5,525  = 2.8, p = 0.017).
Discussion: We identified differences in diurnal cortisol rhythm depending on presence/absence of common TSPO polymorphism in BD volunteers with or without AUD and healthy volunteers. These results have wide ranging implications but further validation is needed prior to optimal clinical translation.
(Copyright © 2018 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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