title: [Spontaneous differentiation potency of induced pluripotent stem cells into male germ cells in vitro].
abstract: OBJECTIVE
  To explore the expression profile of male germ cell-associated genes during the spontaneous differentiation of induced pluripotent stem cells (iPS) and assess the potency of their spontaneous differentiation into male germ cells in vitro.
  
  
  METHODS
  Embryoid body (EB) formation was used to promote the spontaneous differentiation of iPS into male germ cells, and the expressions of germ cell-associated genes were detected by real-time PCR and PCR.
  
  
  RESULTS
  Real-time PCR and PCR revealed different expression levels of relevant genes at different times of iPS spontaneous differentiation into male germ cells. Each of the 9 genes analyzed exhibited one of the four temporal expression patterns: wavelike increase of Oct4, progressive decrease of Dppa3 and Stra8, wavelike decrease of Dazl, and decrease following initial increase of Tex14, Msy2, Scp1, Scp3 and Akap3.
  
  
  CONCLUSIONS
  Induced pluripotent stem cells express male germ cell-associated genes and male haploid genes during their spontaneous differentiation through EB formation, and have the potency of differentiating into male gametes.
authors.affiliation: Department of Urology, Shanghai Institute of Andrology, Shanghai Human Sperm Bank, Laboratory of Sperm Development and Genetics, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200001, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Li
authors.forename: Hong-liang
authors.initials: HL
authors.lastname: Hu
authors.forename: Ling-ling
authors.initials: LL
authors.lastname: Zhang
authors.forename: Hui
authors.initials: H
authors.lastname: Ding
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.forename: Ru-hui
authors.initials: RH
authors.lastname: Tian
authors.forename: Ping
authors.initials: P
authors.lastname: Liu
authors.forename: Zhan-ping
authors.initials: ZP
authors.lastname: Shi
authors.forename: Xi-zhi
authors.initials: XZ
authors.lastname: Guo
authors.forename: Zheng
authors.initials: Z
authors.lastname: Li
authors.forename: Yi-ran
authors.initials: YR
authors.lastname: Huang
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D002460:Cell Line; D020869:Gene Expression Profiling; D005854:Germ Cells / Q000166:cytology*; D057026:Induced Pluripotent Stem Cells / Q000166:cytology*; D008297:Male; D051379:Mice; D008813:Mice, Inbred ICR