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Int. J. Mol. Sci. 2017, 18(7), 1578;

Age-Related Loss of Cohesion: Causes and Effects

State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong 226001, China
Author to whom correspondence should be addressed.
Received: 18 June 2017 / Revised: 18 July 2017 / Accepted: 19 July 2017 / Published: 22 July 2017
(This article belongs to the Section Biochemistry)
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Aneuploidy is a leading genetic cause of birth defects and lower implantation rates in humans. Most errors in chromosome number originate from oocytes. Aneuploidy in oocytes increases with advanced maternal age. Recent studies support the hypothesis that cohesion deterioration with advanced maternal age represents a leading cause of age-related aneuploidy. Cohesin generates cohesion, and is established only during the premeiotic S phase of fetal development without any replenishment throughout a female’s period of fertility. Cohesion holds sister chromatids together until meiosis resumes at puberty, and then chromosome segregation requires the release of sister chromatid cohesion from chromosome arms and centromeres at anaphase I and anaphase II, respectively. The time of cohesion cleavage plays an important role in correct chromosome segregation. This review focuses specifically on the causes and effects of age-related cohesion deterioration in female meiosis. View Full-Text
Keywords: age; cohesion; aneuploidy; oocytes age; cohesion; aneuploidy; oocytes

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Cheng, J.-M.; Liu, Y.-X. Age-Related Loss of Cohesion: Causes and Effects. Int. J. Mol. Sci. 2017, 18, 1578.

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