Long-term sub-erythemal UVB exposure does not impact circadian rhythms in mice under standard and rotating shift light conditions.

IF 2.6 4区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY
Adam J Greer, Sean J Cone, Rachel Bernstein, Elizabeth Schuetz, Narayani Prasad Kar, Bala S C Koritala, Shobhan Gaddameedhi
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引用次数: 0

Abstract

The International Agency for Research on Cancer (IARC) stated that circadian disruption is a potential carcinogen. However, the impact of environmental carcinogens, including sub-erythemal doses of UVB exposure, on circadian rhythms remains unclear. We evaluated the impact of long-term rotating shift, loss of Per1/2 genes, and chronic UVB exposure on the circadian rhythms of SKH-1 mice for up to 7 months. Real-time locomotion and circadian gene expression were measured in these animals. Mice under rotating shift exhibited a longer period of activity of up to 25.20 h, while those under standard light conditions had a clear 24-h rhythm. mPer1/mPer2 mice, conversely, displayed a shortened period of activity of 23.61 h. Interestingly, chronic UVB exposure had no impact on activity rhythms, though it induced skin tumors in all mice. Rotating shift and loss of mPer1/mPer2 led to circadian dysregulation of all core clock genes, with a notable phase difference in Cry1. These findings provide novel insights into environmental and genetic influences on circadian rhythms.

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来源期刊
Photochemistry and Photobiology
Photochemistry and Photobiology 生物-生化与分子生物学
CiteScore
6.70
自引率
12.10%
发文量
171
审稿时长
2.7 months
期刊介绍: Photochemistry and Photobiology publishes original research articles and reviews on current topics in photoscience. Topics span from the primary interaction of light with molecules, cells, and tissue to the subsequent biological responses, representing disciplinary and interdisciplinary research in the fields of chemistry, physics, biology, and medicine. Photochemistry and Photobiology is the official journal of the American Society for Photobiology.
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