Cited by 39Circadian rhythm and melatoninPituitary Gland Disorders and TreatmentsAdrenal Hormones and Disorders

Predictors of post-traumatic pituitary failure during long-term follow-up

Open access
Nemes, Orsolya, Kovacs, Noemi, Czeiter, Endre, Kenyeres, Peter, Tarjanyi, Zita, Bajnok, Laszlo, Buki, Andras, Doczi, Tamas +1 more·2015·Hormones

Abstract

Objective The circadian hormone melatonin has wide-reaching effects on human physiology. In adolescents, the impact of nighttime light exposure and other modifiable behavioral factors on melatonin levels is poorly understood.Design We cross-sectionally examined the influence of nighttime behaviors on melatonin levels in 100 adolescents (average age: 15.7; 55 female, 45 male), who completed a self-administered questionnaire and provided a first morning urine sample to assay for urinary 6-sulfatoxymelatonin (aMT6s) levels. We used mixed-effects regression models to test for differences in aMT6s levels by categories of covariates.Results Self-reported sleep duration, ambient light levels during sleep, and use of electronics after turning off lights did not significantly predict aMT6s levels. Compared to those who reported weekend bedtimes before 11 pm, urinary aMT6s levels were significantly lower among participants reporting weekend bedtimes after midnight (52.5 vs. 38.0 ng/mg creatinine, P trend=0.007). Sleep interruption also appeared to be significantly associated with lower urinary aMT6s levels, but only if lights were turned on during sleep interruption (43.0 ng/mg creatinine for participants with sleep interruption but not turning lights on, vs. 24.6 ng/mg creatinine for participants reporting that they turned on the light when their sleep was interrupted P difference=0.032).Conclusions Our study suggests that self-reported sleep-related behaviors have little to no effect on adolescent circadian systems, though larger studies are needed to confirm our findings.

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Crossref · 10.14310/horm.2002.1564

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Authors
Nemes, O., Kovacs, N., Czeiter, E., Kenyeres, P., Tarjanyi, Z., Bajnok, L., Buki, A., Doczi, T., & Mezosi, E.
Affiliations
  • Brown University (US)
  • Harvard University (US)
  • University of Cincinnati (US)
  • Brigham and Women's Hospital (US)
  • University of Pecs (HU)
Venue
Hormones
Published
2015-07
Volume
14
Issue
3
Pages
383-391
ISSN
  • 1109-3099 (ISSN-L)
  • 2520-8721
OpenAlex
W2036486979
Cited by
39
References
84
Citations by year
2026: 1 · 2025: 3 · 2024: 3 · 2023: 1 · 2022: 2 · 2021: 4 · 2020: 1 · 2019: 6 · 2018: 2 · 2017: 4 · 2016: 7 · 2015: 5
FWCI
2.60
Type
journal article
Language
en
Open access
Locations
  • HORMONES (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Cancer Institute (R25CA098566, T32 CA0090001, T32CA009001)
  • National Institute for Occupational Safety and Health (R01OH009803)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Pituitary Gland Disorders and Treatments
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
Keywords
melatonin, 6-sulfatoxymelatonin, urinary melatonin, adolescents, nocturnal light exposure, sleep duration, bedtime, sleep disruption, circadian rhythm
MeSH terms
Adolescent, Adult, Aged, Aged, 80 and over, Brain Injuries, Child, Female, Follow-Up Studies, Humans, Hypopituitarism, Male, Middle Aged, Young Adult

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