Night Shift Work and Hormone Levels in Women
Night Shift Work and Hormone Levels in Women
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DOI:
10.1158/1055-9965.epi-11-1128
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发表时间:
2012-04-01
影响因子:
3.8
通讯作者:
Stanczyk, Frank Z.
中科院分区:
文献类型:
--
作者:
Davis, Scott;Mirick, Dana K.;Stanczyk, Frank Z.
Background: Night shift work may disrupt the normal nocturnal rise in melatonin, resulting in increased breast cancer risk, possibly through increased reproductive hormone levels. We investigated whether night shift work is associated with decreased levels of urinary 6-sulfatoxymelatonin, the primary metabolite of melatonin, and increased urinary reproductive hormone levels.Methods: Participants were 172 night shift and 151 day shift-working nurses, aged 20-49 years, with regular menstrual cycles. Urine samples were collected throughout work and sleep periods and assayed for 6-sulfatoxymelatonin, luteinizing hormone (LH), follicle-stimulating hormone (FSH), and estrone conjugate (E1C).Results: 6-Sulfatoxymelatonin levels were 62% lower and FSH and LH were 62% and 58% higher, respectively, in night shift-working women during daytime sleep than in day shift-working women during nighttime sleep (P