Generation of germ cells in vitro in the era of induced pluripotent stem cells

Masanori Imamura, Orie Hikabe, Zachary Yu Ching Lin, Hideyuki Okano

Research output: Contribution to journalReview articlepeer-review

24 Citations (Scopus)


Induced pluripotent stem cells (iPSCs) are stem cells that can be artificially generated via "cellular reprogramming" using gene transduction in somatic cells. iPSCs have enormous potential in stem-cell biology as they can give rise to numerous cell lineages, including the three germ layers. An evaluation of germ-line competency by blastocyst injection or tetraploid complementation, however, is critical for determining the developmental potential of mouse iPSCs towards germ cells. Recent studies have demonstrated that primordial germ cells obtained by the in vitro differentiation of iPSCs produce functional gametes as well as healthy offspring. These findings illustrate not only that iPSCs are developmentally similar to embryonic stem cells (ESCs), but also that somatic cells from adult tissues can produce gametes in vitro, that is, if they are reprogrammed into iPSCs. In this review, we discuss past and recent advances in the in vitro differentiation of germ cells using pluripotent stem cells, with an emphasis on ESCs and iPSCs. While this field of research is still at a stage of infancy, it holds great promises for investigating the mechanisms of germ-cell development, especially in humans, and for advancing reproductive and developmental engineering technologies in the future.

Original languageEnglish
Pages (from-to)2-19
Number of pages18
JournalMolecular reproduction and development
Issue number1
Publication statusPublished - 2014 Jan


  • ES cells
  • Germ cells
  • IPS cells
  • In vitro differentiation

ASJC Scopus subject areas

  • Genetics
  • Developmental Biology
  • Cell Biology


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