Exposure to Light at Night, Nocturnal Urinary Melatonin Excretion, and Obesity/Dyslipidemia in the Elderly: A Cross-Sectional Analysis of the HEIJO-KYO Study

Exposure to Light at Night, Nocturnal Urinary Melatonin Excretion, and Obesity/Dyslipidemia in the Elderly: A Cross-Sectional Analysis of the HEIJO-KYO Study

Context: Obesity and exposure to light at night (LAN) have increased globally. Although LAN suppresses melatonin secretion and disturbs body mass regulation in experimental settings, its associations with melatonin secretion, obesity, and other metabolic consequences in uncontrolled home settings re...

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Veröffentlicht in:The journal of clinical endocrinology and metabolism 2013-01, Vol.98 (1), p.337-344
Hauptverfasser: Obayashi, Kenji, Saeki, Keigo, Iwamoto, Junko, Okamoto, Nozomi, Tomioka, Kimiko, Nezu, Satoko, Ikada, Yoshito, Kurumatani, Norio
Format: Artikel
Sprache:eng
Schlagworte:
Aged
Aged, 80 and over
Biological and medical sciences
Case-Control Studies
Circadian Rhythm - physiology
Cross-Sectional Studies
Dyslipidemias - complications
Dyslipidemias - metabolism
Dyslipidemias - urine
Endocrinopathies
Feeding. Feeding behavior
Female
Fundamental and applied biological sciences. Psychology
Humans
Japan
Light
Male
Medical sciences
Melatonin - secretion
Melatonin - urine
Obesity - complications
Obesity - metabolism
Obesity - urine
Photoperiod
Vertebrates: anatomy and physiology, studies on body, several organs or systems
Vertebrates: endocrinology
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Zusammenfassung:Context: Obesity and exposure to light at night (LAN) have increased globally. Although LAN suppresses melatonin secretion and disturbs body mass regulation in experimental settings, its associations with melatonin secretion, obesity, and other metabolic consequences in uncontrolled home settings remain unclear. Objective: The aim of this study was to determine the association of exposure to LAN in an uncontrolled home setting with melatonin secretion, obesity, dyslipidemia, and diabetes. Design and Participants: A cross-sectional study was performed in 528 elderly individuals (mean age, 72.8 yr). Measures: The intensity of LAN in the bedroom was measured at 1-min intervals during two consecutive nights, along with overnight urinary melatonin excretion and metabolic parameters. Results: Compared with the Dim group (average
ISSN:0021-972X
1945-7197
DOI:10.1210/jc.2012-2874