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Study finds nighttime work can impact on health

A new study from the University of Surrey has highlighted the potential risk to worker health from shift work after it found that the daily rhythms of our genes are disrupted when sleep times shift.

Researchers placed twenty-two participants on a 28-hour day in a controlled environment without a natural light-dark cycle.  As a result, their sleep-wake cycle was delayed by four hours each day, until sleep occurred 12 hours out of sync with their brain clock and in the middle of what would have been their normal ‘daytime’. The team then collected blood samples to measure the participants’ rhythms of gene expression.

During this disruption of sleep timing, there was a six-fold reduction in the number of genes that displayed a circadian rhythm (a rhythm with an approximately 24 hour period). This included many regulators associated with transcription and translation, indicating widespread disruption to many biological processes.

Senior author Professor Derk-Jan Dijk, from the Sleep Research Centre at the University of Surrey said:

"This research may help us to understand the negative health outcomes associated with shift work, jet lag and other conditions in which the rhythms of our genes are disrupted.

"The results also imply that sleep-wake schedules can be used to influence rhythmicity in many biological processes, which may be very relevant for conditions in which our body clocks are altered, such as in ageing."

Co-author, Dr Simon Archer, from the School of Biosciences and Medicine at the University of Surrey, added: "Over 97% of rhythmic genes become out of sync with mistimed sleep and this really explains why we feel so bad during jet lag, or if we have to work irregular shifts."

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For specialist personal injury claims advice in Scotland, including advice on work related injury claims, contact us today: click here to make an online enquiry or call us on 0800 027 1480.

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