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Circadian system, sleep and endocrinology

Morris, Ch. J. und Aeschbach, D. und Scheer, F. A. J. L. (2012) Circadian system, sleep and endocrinology. Molecular and Cellular Endocrinology (349), Seiten 91-104.

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Kurzfassung

Levels of numerous hormones vary across the day and night. Such fluctuations are not only attributable to changes in sleep/wakefulness and other behaviors but also to a circadian timing system governed by the suprachiasmatic nucleus of the hypothalamus. Sleep has a strong effect on levels of some hormones such as growth hormone but little effect on others which are more strongly regulated by the circadian timing system (e.g., melatonin). Whereas the exact mechanisms through which sleep affects circulating hormonal levels are poorly understood, more is known about how the circadian timing system influences the secretion of hormones. The suprachiasmatic nucleus exerts its influence on hormones via neuronal and humoral signals but it is now also apparent that peripheral tissues contain circadian clock proteins, similar to those in the suprachiasmatic nucleus, that are also involved in hormone regulation. Under normal circumstances, behaviors and the circadian timing system are synchronized with an optimal phase relationship and consequently hormonal systems are exquisitely regulated. However, many individuals (e.g., shift-workers) frequently and/or chronically undergo circadian misalignment by desynchronizing their sleep/wake and fasting/feeding cycle from the circadian timing system. Recent experiments indicate that circadian misalignment has an adverse effect on metabolic and hormonal factors such as circulating glucose and insulin. Further research is needed to determine the underlying mechanisms that cause the negative effects induced by circadian misalignment. Such research could aid the development of novel countermeasures for circadian misalignment.

Dokumentart:Zeitschriftenbeitrag
Titel:Circadian system, sleep and endocrinology
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Morris, Ch. J.NICHT SPEZIFIZIERT
Aeschbach, D.daniel.aeschbach@dlr.de
Scheer, F. A. J. L.NICHT SPEZIFIZIERT
Datum:2012
Erschienen in:Molecular and Cellular Endocrinology
Referierte Publikation:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Seitenbereich:Seiten 91-104
Status:veröffentlicht
Stichwörter:Misalignment, Night-work, Shift-work, Melatonin, Cortisol
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:keine Zuordnung
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L - keine Zuordnung
DLR - Teilgebiet (Projekt, Vorhaben):L -- keine Zuordnung
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Luft- und Raumfahrtmedizin > Flugphysiologie
Hinterlegt von: Alina Sender
Hinterlegt am:10 Aug 2012 09:37
Letzte Änderung:26 Feb 2013 15:06

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