Cited by 113Circadian rhythm and melatoninBipolar Disorder and TreatmentSleep and Wakefulness Research

Assessment of circadian function in fibroblasts of patients with bipolar disorder

Yang, S, Van Dongen, H P A, Wang, K, Berrettini, W, Bućan, M·2009·Molecular Psychiatry

Abstract

Previous studies have implicated the circadian system in the pathophysiology of bipolar disorder, but conclusive evidence for altered circadian clocks is lacking. Cultured fibroblasts harbor circadian clocks representative of those in the master clock resident in the suprachiasmatic nuclei, providing a new avenue to investigate the core clock machinery in patients with bipolar illness. We examined the rhythmic expression patterns of core clock genes (BMAL1, PER1, PER2, REV-ERBalpha, DEC2, DBP) in fibroblasts from 12 bipolar patients and 12 healthy controls. Although we did not detect differences in the circadian period between bipolar patients and controls, the amplitude of rhythmic expression for BMAL1, REV-ERBalpha and DBP, as well as the overall mRNA expression level for DEC2 and DBP was reduced in fibroblasts from bipolar patients. Bonferroni's correction for multiple comparisons still resulted in significantly reduced DBP expression level, and trends toward reduced overall expression level of DEC2 and circadian amplitude of BMAL1, in fibroblasts from bipolar patients. We next examined an expanded cohort of 18 bipolar patients and 35 healthy controls for mRNA expression levels of four kinases (CKIdelta, CKIepsilon, GSK3alpha and GSK3beta) and the protein and phosphorylation levels of two of them (GSK3alpha and GSK3beta). We did not detect differences in steady-state mRNA levels or protein levels of these kinases between bipolar patients and controls, but the level of GSK3beta phosphorylation was significantly reduced in bipolar patients within an Old Order Amish bipolar kindred. Our results suggest that the reduced amplitudes and overall expression levels of circadian genes, and the decreased phosphorylation level of GSK3beta may lead to dysregulation of downstream genes, which could explain some pathological features of bipolar disorder.

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Crossref · 10.1038/mp.2008.10

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105 of 105 references verified0 citation errors · 0 not checkable

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  • Circadian dysfunction associated with psychiatric illnesses likely represents uncoupling of autonomous oscillators in the suprachiasmatic nucleus or disruptions in the output from the suprachiasmatic nucleus to other parts of the brain.

    “Circadian dysfunction associated with psychiatric illnesses likely represents uncoupling of autonomous oscillators in the SCN or disruptions in the output from the SCN to other parts of the brain (Yang et al., 2008).”
  • Sensitive and specific sleep biomarkers of psychiatric disorders have not been validated.

    “Despite some promising early leads, sensitive and specific sleep biomarkers of psychiatric disorders have not been validated (Yang et al., 2008).”
  • Intercellular coupling of circadian oscillators can compensate for genetic deficiencies in individual clock components.

    “Because intercellular coupling of circadian oscillators can compensate for genetic deficiencies in individual clock components, further understanding of the regulation of coupling could provide novel insight into the mechanisms of increasing”
  • Fibroblasts from bipolar patients and healthy individuals show reduced amplitudes and overall expression levels of some circadian genes, and decreased phosphorylation level of GSK3β, which may lead to dysregulation of downstream genes and might account for some pathological features of bipolar disorder.

    “Their results suggest that reduced amplitudes and overall expression levels of some circadian genes, and the decreased phosphorylation level of GSK3β, may lead to dysregulation of downstream genes, which might account for some pathological features of bipolar disorder.”

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Authors
Yang, S., Van Dongen, H. P. A., Wang, K., Berrettini, W., & Bućan, M.
Affiliations
University of Pennsylvania (US)
Corresponding author
Bućan, M
Venue
Molecular Psychiatry
Published
2008-02-26
Volume
14
Issue
2
Pages
143-155
ISSN
  • 1359-4184 (ISSN-L)
  • 1476-5578
OpenAlex
W2038664453
Cited by
113
References
106
Citations by year
2026: 2 · 2025: 3 · 2024: 7 · 2023: 3 · 2022: 6 · 2021: 7 · 2020: 5 · 2019: 4 · 2018: 4 · 2017: 3 · 2016: 9 · 2015: 7 · 2014: 10 · 2013: 14 · 2012: 7
FWCI
3.11
Type
journal article
Language
en
Open access
closed
Locations
  • Molecular Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Mental Health (R21MH078179, R01MH604687)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Health Sciences › Medicine › Psychiatry and Mental health › Bipolar Disorder and Treatment
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
Keywords
bipolar disorder, circadian clock, fibroblasts, core clock genes, Bmal1, DBP, DEC2, NR1D1, Per1, Per2, GSK3β phosphorylation, suprachiasmatic nucleus, circadian rhythm amplitude
MeSH terms
Adult, Age Factors, Analysis of Variance, Bipolar Disorder, Cells, Cultured, Circadian Rhythm, Female, Fibroblasts, Gene Expression Regulation, Humans, Male, Middle Aged, Protein Kinases, RNA, Messenger, Time Factors, Gene Expression, Case-Control Studies, Culture Media, Serum-Free, Cell Cycle Proteins, Serum, Young Adult

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