Overnight Melatonin Concentration and Sleep Quality Are Associated With Clinical Features of Polycystic Ovary Syndrome
Abstract
Abstract Introduction: Women with polycystic ovary syndrome (PCOS) have an increased incidence of sleep disturbances compared to healthy women. Circulating melatonin (MEL) is elevated in women with PCOS, thought to reflect an increased daytime and blunted peak in overnight MEL, consistent with an altered circadian rhythm. Whether circadian disruptions coincide with sleep disturbances in women with PCOS or their symptom severity is unclear. Objective: To determine whether altered MEL production coincides with reduced sleep quality in women with PCOS and to examine whether there is a relationship between MEL production, sleep disturbances and the diagnostic features of PCOS. Methods: Women with PCOS (n=22) and controls (n=12) were recruited prospectively. PCOS was defined based on the 2018 International Guideline. Controls exhibited no more than 1 diagnostic feature of PCOS. Women underwent a reproductive history, clinical exam, and transvaginal ultrasound. Fasting blood samples were obtained to measure reproductive hormones. Urine samples were collected in the evening and upon awakening on 1-2 days and assayed for urinary 6-sulfatoxymelatonin as a proxy for daytime and overnight MEL production, respectively. The night:day (N:D) MEL ratio was determined to assess the rhythm of MEL production. Sleep quality and duration were assessed using the Pittsburgh Sleep Quality Index (PSQI) and via overnight wrist actigraphy. Differences between measures of urinary MEL and sleep quality…
Read the paper
Related studies
- Tryptophan Metabolism and Gut-Brain Homeostasis
- Rationale for a Multi-Factorial Approach for the Reversal of Cognitive Decline in Alzheimer’s Disease and MCI: A Review
- Prioritized Research for the Prevention, Treatment, and Reversal of Chronic Disease: Recommendations From the Lifestyle Medicine Research Summit
- Relationship between sleep disorders and gut dysbiosis: what affects what?
- The role of CLOCK gene in psychiatric disorders: Evidence from human and animal research
- Genetic, Transcriptome, Proteomic, and Epidemiological Evidence for Blood-Brain Barrier Disruption and Polymicrobial Brain Invasion as Determinant Factors in Alzheimer’s Disease
Go deeper in Evidence Hub
Evidence Hub adds a study data sheet (design, sample size, evidence level, key numbers), an AI summary and a chat grounded in the paper's text.