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BioMed Research International
Volume 2013, Article ID 608728, 9 pages
http://dx.doi.org/10.1155/2013/608728
Research Article

Differentiation of Induced Pluripotent Stem Cells into Male Germ Cells In Vitro through Embryoid Body Formation and Retinoic Acid or Testosterone Induction

1Shanghai Human Sperm Bank, Department of Urology, Shanghai Institute of Andrology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200001, China
2Clinical Stem Cell Research Center, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
3BIO-X Center, Shanghai Jiao Tong University, Shanghai 200240, China
4Shanghai Key Laboratory of Reproductive Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
5State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200032, China

Received 14 July 2012; Accepted 8 September 2012

Academic Editor: Xuan Jin

Copyright © 2013 Peng Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Generation of germ cells from pluripotent stem cells in vitro could have great application for treating infertility and provides an excellent model for uncovering molecular mechanisms controlling gametogenesis. In this study, we explored the differentiation potential of mouse induced pluripotent stem (iPS) cells towards male germ cells. Embryoid body formation and retinoic acid/testosterone induction were applied to promote differentiation of mouse iPS cells into male germ cells in vitro. Quantitative RT-PCR and immunoflourescence were performed to characterize the iPS cell differentiation process, and notably there were different temporal expression profiles of male germ cell-associated genes. The expression of proteins, including MVH, CDH1, and SCP3, was remarkably increased. mRNA expression of Stra8, Odf2, Act, and Prm1 was upregulated in iPS cells by retinoic acid or testosterone induction, whereas Oct-4 transcription was reduced in these cells compared to the controls. Hormones were also measured in the EB medium. DNA content analysis by flow cytometry revealed that iPS cells could differentiate into haploid cells through retinoic acid or testosterone treatment. Collectively, our results suggest that mouse iPS cells possess the potency to differentiate into male germ cells in vitro through embryoid body formation and retinoic acid or testosterone induction.