Metastable primordial germ cell-like state induced from mouse embryonic stem cells by Akt activation.

Abstract:

:Specification to primordial germ cells (PGCs) is mediated by mesoderm-induction signals during gastrulation. We found that Akt activation during in vitro mesodermal differentiation of embryonic stem cells (ESCs) generated self-renewing spheres with differentiation states between those of ESCs and PGCs. Essential regulators for PGC specification and their downstream germ cell-specific genes were expressed in the spheres, indicating that the sphere cells had commenced differentiation to the germ lineage. However, the spheres did not proceed to spermatogenesis after transplantation into testes. Sphere cell transfer to the original feeder-free ESC cultures resulted in chaotic differentiation. In contrast, when the spheres were cultured on mouse embryonic fibroblasts or in the presence of ERK-cascade and GSK3 inhibitors, reversion to the ESC-like state was observed. These results indicate that Akt signaling promotes a novel metastable and pluripotent state that is intermediate to those of ESCs and PGCs.

authors

Yamano N,Kimura T,Watanabe-Kushima S,Shinohara T,Nakano T

doi

10.1016/j.bbrc.2010.01.005

subject

Has Abstract

pub_date

2010-02-12 00:00:00

pages

311-6

issue

3

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(10)00027-6

journal_volume

392

pub_type

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