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Transcription factor-based transdifferentiation of human embryonic to trophoblast stem cells.

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journal contribution
posted on 2024-09-17, 11:21 authored by Paula A Balestrini, Ahmed Abdelbaki, Afshan Mccarthy, Liani Devito, Claire E Senner, Alice E Chen, Prabhakaran Munusamy, Paul Blakeley, Kay Elder, Phil Snell, Leila Christie, Paul Serhal, Rabi A Odia, Mahesh Sangrithi, Kathy K Niakan, Norah ME Fogarty
During the first week of development, human embryos form a blastocyst composed of an inner cell mass and trophectoderm (TE) cells, the latter of which are progenitors of placental trophoblast. Here, we investigated the expression of transcripts in the human TE from early to late blastocyst stages. We identified enrichment of the transcription factors GATA2, GATA3, TFAP2C and KLF5 and characterised their protein expression dynamics across TE development. By inducible overexpression and mRNA transfection, we determined that these factors, together with MYC, are sufficient to establish induced trophoblast stem cells (iTSCs) from primed human embryonic stem cells. These iTSCs self-renew and recapitulate morphological characteristics, gene expression profiles, and directed differentiation potential, similar to existing human TSCs. Systematic omission of each, or combinations of factors, revealed the crucial importance of GATA2 and GATA3 for iTSC transdifferentiation. Altogether, these findings provide insights into the transcription factor network that may be operational in the human TE and broaden the methods for establishing cellular models of early human placental progenitor cells, which may be useful in the future to model placental-associated diseases.

Funding

Crick (Grant ID: CC2074, Grant title: Niakan CC2074) Crick (Grant ID: CC1070, Grant title: STP HESCU)

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