RT Journal Article SR Electronic T1 Stepwise approach to oocyte depletion in Sry mutated XY female mice JF bioRxiv FD Cold Spring Harbor Laboratory SP 146571 DO 10.1101/146571 A1 Akihiko Sakashita A1 Takuya Wakai A1 Yukiko Kawabata A1 Chiaki Nishimura A1 Yusuke Sotomaru A1 Tomohiro Kono YR 2017 UL http://biorxiv.org/content/early/2017/06/06/146571.abstract AB Little is known regarding the mechanisms underlying infertility in male-to-female sex-reversed females. To gain a better understanding of germ cell dysfunction in this condition, we produced XYsry−-females via the CRISPR/Cas9 system in C57BL/6 inbred strain mice. Mutant mice showed severe attrition of germ cells during foetal development, resulting in depletion of ovarian germ cells before sexual maturation. Comprehensive transcriptome analysis of embryonic day 13.5 primordial germ cells (PGCs) and postnatal day 1 oocytes demonstrated that XYsry−-PGCs had already deviated from the developmental process at the mitotic stage. In addition, XYsry−-oocytes resulted in meiotic disruption and developmental failure, and the genes related to these processes were significantly changed. This grievous disruption, which caused germ cell deterioration in XYsry−-females, was shown to proceed from the germ cells themselves. These results provide novel insight into the germ cell depletion of sex-reversed mice as well as into disorders of sex differentiation in human, such as ‘Swyer syndrome’, wherein patients present as typical females albeit with an XY karyotype and infertile.