Cited by 30Circadian rhythm and melatoninSleep and related disordersSleep and Wakefulness Research

Circadian Polymorphisms in Night Owls, in Bipolars, and in Non-24-Hour Sleep Cycles

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Kripke, Daniel F., Klimecki, Walter T., Nievergelt, Caroline M., Rex, Katharine M., Murray, Sarah S., Shekhtman, Tatyana, Tranah, Gregory J., Loving, Richard T. +7 more·2014·Psychiatry Investigation

Abstract

People called night owls habitually have late bedtimes and late times of arising, sometimes suffering a heritable circadian disturbance called delayed sleep phase syndrome (DSPS). Those with DSPS, those with more severe progressively-late non-24-hour sleep-wake cycles, and those with bipolar disorder may share genetic tendencies for slowed or delayed circadian cycles. We searched for polymorphisms associated with DSPS in a case-control study of DSPS research participants and a separate study of Sleep Center patients undergoing polysomnography. In 45 participants, we resequenced portions of 15 circadian genes to identify unknown polymorphisms that might be associated with DSPS, non-24-hour rhythms, or bipolar comorbidities. We then genotyped single nucleotide polymorphisms (SNPs) in both larger samples, using Illumina Golden Gate assays. Associations of SNPs with the DSPS phenotype and with the morningness-eveningness parametric phenotype were computed for both samples, then combined for meta-analyses. Delayed sleep and "eveningness" were inversely associated with loci in circadian genes NFIL3 (rs2482705) and RORC (rs3828057). A group of haplotypes overlapping BHLHE40 was associated with non-24-hour sleep-wake cycles, and less robustly, with delayed sleep and bipolar disorder (e.g., rs34883305, rs34870629, rs74439275, and rs3750275 were associated with n=37, p=4.58E-09, Bonferroni p=2.95E-06). Bright light and melatonin can palliate circadian disorders, and genetics may clarify the underlying circadian photoperiodic mechanisms. After further replication and identification of the causal polymorphisms, these findings may point to future treatments for DSPS, non-24-hour rhythms, and possibly bipolar disorder or depression.

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  • Mutations in clock genes such as CRY1, NFIL3 and RORC have been linked to extreme phase delay (delayed sleep-wake phase disorder) in genetic studies of families.

    “Mutations in clock genes such as CRY1, NFIL3 and RORC have been linked to extreme phase delay (that is, delayed sleep–wake phase disorder) in genetic studies of families224,225.”

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  1. [14]Winkelman J Kotagal S Olson E Scammel T Schenck C Spielman A The International Classification of Sleep Disorders, Second Edition, Pocket Version: Diagnostic and Coding Manual Westchester, IL American Academy of Sleep Disorders 2006
  2. [40]Kripke DF Klimecki W EF015893-EF015905 and EF028070. GenBank Nucleotide. 9-21-2006 http://www.ncbi.nlm.nih.gov/nuccore/ef015893 and following, NCBI
  3. [63]Halberg F Physiologic Considerations Underlying Rhythmometry, with Special Reference to Emotional Illness Symposium on Biological Cycles and Psychiatry. Symposium Bell-Air III Geneva Mason et Cie 1967 73 126

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Authors
Kripke, D. F., Klimecki, W. T., Nievergelt, C. M., Rex, K. M., Murray, S. S., Shekhtman, T., Tranah, G. J., Loving, R. T., Lee, H.-J., Rhee, M. K., Shadan, F. F., Poceta, J. S., Jamil, S. M., Kline, L. E., & Kelsoe, J. R.
Affiliations
  • University of California San Diego (US)
  • University of Arizona (US)
  • California Pacific Medical Center (US)
  • Sharp Mesa Vista Hospital, San Diego, CA, USA.
  • Korea University (KR)
  • Department of Psychology, Gyeongsang National University, Jinju, Republic of Korea.
  • Scripps Clinic (US)
Corresponding author
Kripke, Daniel F.
Venue
Psychiatry Investigation
Published
2014
Volume
11
Issue
4
Pages
345
ISSN
  • 1738-3684 (ISSN-L)
  • 1976-3026
OpenAlex
W2093662775
Cited by
30
References
92
Citations by year
2026: 4 · 2024: 3 · 2022: 1 · 2021: 1 · 2020: 1 · 2019: 1 · 2018: 2 · 2017: 8 · 2016: 3 · 2015: 5 · 2014: 1
FWCI
2.76
Type
journal article
Language
en
Open access
Locations
  • Psychiatry Investigation (publishedVersion, cc-by-nc)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • National Institutes of Health
  • National Institute on Aging (R01AG030474)
  • National Heart, Lung, and Blood Institute (R56HL071123, R01HL071123)
  • National Institute of Mental Health (R01MH078151, R01MH059567)
  • National Institute of Environmental Health Sciences (P30ES006694)
  • National Center for Research Resources (UL1RR025774)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
Keywords
delayed sleep phase syndrome, night owls, bipolar disorder, circadian genes, NFIL3, RORC, BHLHE40, single nucleotide polymorphisms, chronotype, genetic association, melatonin, bright light therapy

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