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Neagu, A.; Genderen, E. vanl; Escudero, I.; Verwegen, L.; Kurek, D.; Lehmann, J.; ... ; Berge, D. ten (2020)

In vitro capture and characterization of embryonic rosette-stage pluripotency between naive and primed states

Article / Letter to editor
Neagu, van Genderen and Escudero et al. show that simultaneous inhibition of WNT and MEK signalling maintains a naive-primed intermediate pluripotency state in vitro, which displays features of the mouse embryonic rosette.Following implantation, the naive pluripotent epiblast of the mouse blastocyst generates a rosette, undergoes lumenogenesis and forms the primed pluripotent egg cylinder, which is able to generate the embryonic tissues. How pluripotency progression and morphogenesis are linked and whether intermediate pluripotent states exist remain controversial. We identify here a rosette pluripotent state defined by the co-expression of naive factors with the transcription factor OTX2. Downregulation of blastocyst WNT signals drives the transition into rosette pluripotency by inducing OTX2. The rosette then activates MEK signals that induce lumenogenesis and drive progression to primed pluripotency. Consequently, combined WNT and MEK inhibition supports rosette-like stem cells,...Show moreNeagu, van Genderen and Escudero et al. show that simultaneous inhibition of WNT and MEK signalling maintains a naive-primed intermediate pluripotency state in vitro, which displays features of the mouse embryonic rosette.Following implantation, the naive pluripotent epiblast of the mouse blastocyst generates a rosette, undergoes lumenogenesis and forms the primed pluripotent egg cylinder, which is able to generate the embryonic tissues. How pluripotency progression and morphogenesis are linked and whether intermediate pluripotent states exist remain controversial. We identify here a rosette pluripotent state defined by the co-expression of naive factors with the transcription factor OTX2. Downregulation of blastocyst WNT signals drives the transition into rosette pluripotency by inducing OTX2. The rosette then activates MEK signals that induce lumenogenesis and drive progression to primed pluripotency. Consequently, combined WNT and MEK inhibition supports rosette-like stem cells, a self-renewing naive-primed intermediate. Rosette-like stem cells erase constitutive heterochromatin marks and display a primed chromatin landscape, with bivalently marked primed pluripotency genes. Nonetheless, WNT induces reversion to naive pluripotency. The rosette is therefore a reversible pluripotent intermediate whereby control over both pluripotency progression and morphogenesis pivots from WNT to MEK signals.Show less
All authors
Neagu, A.; Genderen, E. vanl; Escudero, I.; Verwegen, L.; Kurek, D.; Lehmann, J.; Stel, J.; Dirks, R.A.M.; Mierlo, G. van; Maas, A.; Eleveld, C.; Ge, Y.; Dekker, A.T. den; Brouwer, R.W.W.; IJcken, W.F.J. van; Modic, M.; Drukker, M.E.; Jansen, J.H.; Rivron, N.C.; Baart, E.B.; Marks, H.; Berge, D. ten
Date
2020-05-04
Volume
22
Pages
534 - 545
DOI
doi:10.1038/s41556-020-0508-x
Link
http://dx.doi.org/10.1038/s41556-020-0508-x