Cited by 324Bipolar Disorder and TreatmentCircadian rhythm and melatoninTreatment of Major Depression

Influence of CLOCK gene polymorphism on circadian mood fluctuation and illness recurrence in bipolar depression

Benedetti, Francesco, Serretti, Alessandro, Colombo, Cristina, Barbini, Barbara, Lorenzi, Cristina, Campori, Euridice, Smeraldi, Enrico·2003·American Journal of Medical Genetics Part B Neuropsychiatric Genetics

Abstract

Recent studies showed that a polymorphism (T to C nucleotide substitution) in the 3' flanking region of the human CLOCK gene is associated with diurnal preferences of human healthy subjects, with higher "eveningness" in subjects carrying at least one copy of the C allele. We investigated the possible role of CLOCK gene polymorphism in the regulation of diurnal mood fluctuations during a major depressive episode. Sample (n = 101) was collected, in the context of previously reported trials, among patients affected by bipolar disorder type I, depressive episode without psychotic features, free of psychotropic medications. Perceived mood levels were assessed three times a day with self-administered visual analogue scales. Genotype groups showed no significant difference in diurnal mood fluctuations. When stratifying the sample by including only patients with an adequate period of observation (duration of illness higher than 5 years, n = 69), we post-hoc observed a significantly higher recurrence rate in homozygotes for the C variant, which was almost double than that of the other genotype groups. This preliminary observation leads to hypothesize a role for the CLOCK gene polymorphism in the regulation of long-term illness recurrence in bipolar disorder. Given the post-hoc nature of the finding, replication in independent samples is necessary to confirm it.

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Crossref · 10.1002/ajmg.b.20038

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  • In bipolar patients, a single nucleotide polymorphism in the 3′ flanking region of the CLOCK gene (3111 T to C) is associated with a higher recurrence rate of bipolar episodes.

    “in bipolar patients, a single nucleotide polymorphism (SNP) in the 3′ flanking region of the CLOCK gene (3111 T to C) associates with a higher recurrence rate of bipolar episodes (Benedetti et al., 2003).”

    From Circadian genes, rhythms and the biology of mood disorders (2007) · cites this paper as Benedetti et al., 2003

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Authors
Benedetti, F., Serretti, A., Colombo, C., Barbini, B., Lorenzi, C., Campori, E., & Smeraldi, E.
Affiliations
Vita-Salute San Raffaele University (IT)
Corresponding author
Benedetti, Francesco
Venue
American Journal of Medical Genetics Part B Neuropsychiatric Genetics
Publisher
Wiley
Published
2003-09-15
Volume
123B
Issue
1
Pages
23-26
ISSN
  • 1552-4841 (ISSN-L)
  • 1552-485X
OpenAlex
W2039169515
Cited by
324
References
26
Citations by year
2026: 11 · 2025: 8 · 2024: 11 · 2023: 7 · 2022: 6 · 2021: 10 · 2020: 16 · 2019: 12 · 2018: 14 · 2017: 12 · 2016: 17 · 2015: 15 · 2014: 18 · 2013: 17 · 2012: 20
FWCI
4.69
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Medical Genetics Part B Neuropsychiatric Genetics (publishedVersion)
  • PubMed (publishedVersion)
  • Archivio Istituzionale della Ricerca - Università Vita-Salute San Raffaele (submittedVersion)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Bipolar Disorder and Treatment
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
Keywords
clock genes, clock gene polymorphisms, circadian rhythm, bipolar depression, bipolar I disorder, 3' flanking region, eveningness
MeSH terms
Bipolar Disorder, Circadian Rhythm, Humans, Genetic Linkage, Polymorphism, Genetic, Recurrence, Trans-Activators, Chi-Square Distribution, CLOCK Proteins

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