Sleep duration is associated with sperm chromatin integrity among young men in Chongqing, China. (9th October 2017)

• Record Type: Journal Article
• Authors: Wang, Xiaogang; Chen, Qing; Zou, Peng; Liu, Taixiu; Mo, Min; Yang, Huan; Zhou, Niya; Sun, Lei; Chen, Hongqiang; Ling, Xi; Peng, Kaige; Ao, Lin; Yang, Huifang; Cao, Jia; Cui, Zhihong
• Is Part Of: Journal of sleep research. Volume 27:Number 4(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-10-09
• Subjects: chromatin integrity -- sleep duration -- sperm; Sleep -- Periodicals; Sleep disorders -- Periodicals; 612.821
• DOI: 10.1111/jsr.12615
• Languages: English
• ISSNs: 0962-1105

Abstract

Summary: This study explores whether sleep duration is associated with sperm chromatin integrity. To do so, we conducted a three‐phase panel study of 796 male volunteers from colleges in Chongqing (China) from 2013 to 2015. Sleep duration was measured using a modified Munich Chronotype Questionnaire. Sperm DNA integrity was examined via Sperm Chromatin Structure Assay and Comet assay. Setting 7–7.5 h day −1 of sleep duration as a reference, either longer or shorter sleep duration was associated negatively with high DNA stainability (HDS) ( P = 0.009), which reflected the immaturity of sperm chromatin. The volunteers with > 9.0 h day −1 sleep and those with ≤ 6.5 h day −1 sleep had 40.7 and 30.3% lower HDS than did volunteers with 7–7.5 h day −1 sleep. No association was found between sleep duration and DNA fragmentation index or Comet assay parameters. This study suggests that sleep duration is associated with sperm chromatin integrity. Further studies are required to validate these findings and investigate the mechanism underlying this association.