Universität zu Köln

Iggena, Deetje, Winter, York and Steiner, Barbara ORCID: 0000-0003-2106-4532 (2017). Melatonin restores hippocampal neural precursor cell proliferation and prevents cognitive deficits induced by jet lag simulation in adult mice. J. Pineal Res., 62 (4). HOBOKEN: WILEY. ISSN 1600-079X

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Abstract

Frequent flyers and shift workers undergo circadian dysrhythmia with adverse impact on body and mind. The circadian rhythm disorder jet lag disturbs hippocampal neurogenesis and spatial cognition, which represent morphological and functional adult brain plasticity. This raises the question if pro-neurogenic stimuli might prevent those consequences. However, suitable measures to mitigate jet lag-induced adverse effects on brain plasticity have been neglected so far. Here, we used adult C57Bl6 mice to investigate the pro-neurogenic stimuli melatonin (8 mg/kg i.p.) as well as environmental enrichment as potential measures. We applied photoperiod alterations to simulate jet lag by shortening the dark period every third day by 6 hours for 3 weeks. We found that jet lag simulation reduced hippocampal neural precursor cell proliferation by 24% and impaired spatial memory performance in the water maze indicated by a prolonged swim path to the target (similar to 23%). While melatonin prevented both the cellular (similar to 1%) as well as the cognitive deficits (similar to 5%), environmental enrichment only preserved precursor cell proliferation (similar to 12%). Our results indicate that lifestyle interventions are insufficient to completely compensate jet lag-induced consequences. Instead, melatonin is required to prevent cognitive impairment caused by the same environmental factors to which frequent flyers and shift workers are typically exposed to.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Iggena, Deetje UNSPECIFIED UNSPECIFIED UNSPECIFIED Winter, York UNSPECIFIED UNSPECIFIED UNSPECIFIED Steiner, Barbara UNSPECIFIED orcid.org/0000-0003-2106-4532 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-233352
DOI:	10.1111/jpi.12397
Journal or Publication Title:	J. Pineal Res.
Volume:	62
Number:	4
Date:	2017
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1600-079X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PHASE ADVANCE; NEUROGENESIS; SLEEP; NEURONS; RATS Multiple languages Endocrinology & Metabolism; Neurosciences; Physiology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/23335