Frontiers in Cell and Developmental Biology (Apr 2022)

LMNA Determines Nuclear Morphology During Syncytialization of Human Trophoblast Stem Cells

  • Yiming Wang,
  • Yiming Wang,
  • Yiming Wang,
  • Yiming Wang,
  • Hao Wu,
  • Hao Wu,
  • Hao Wu,
  • Hao Wu,
  • Xiangxiang Jiang,
  • Xiangxiang Jiang,
  • Lei Jia,
  • Meijiao Wang,
  • Meijiao Wang,
  • Meijiao Wang,
  • Yin Rong,
  • Yin Rong,
  • Yin Rong,
  • Yin Rong,
  • Shuo Chen,
  • Shuo Chen,
  • Shuo Chen,
  • Shuo Chen,
  • Yue Wang,
  • Yue Wang,
  • Yue Wang,
  • Yue Wang,
  • Zhenyu Xiao,
  • Zhenyu Xiao,
  • Zhenyu Xiao,
  • Zhenyu Xiao,
  • Xiaoyan Liang,
  • Hongmei Wang,
  • Hongmei Wang,
  • Hongmei Wang,
  • Hongmei Wang

DOI
https://doi.org/10.3389/fcell.2022.836390
Journal volume & issue
Vol. 10

Abstract

Read online

Upon implantation, the trophectoderm differentiates into the multi-nucleated primitive syncytiotrophoblast (pSTB) through a process called primary syncytialization to facilitate maternal-fetal interactions and to establish a pregnancy. However, ethical issues and limited access to human embryos around the time of embryo implantation hinder the investigation of the detailed molecular mechanisms underpinning this event in humans. Here we established human trophoblast stem cells (hTSCs) from human blastocysts. We characterized nuclear enlargement in STB differentiated from hTSCs, which recapitulate morphological nuclear features of pSTB in human embryos. Specifically, we revealed that CRISPR/Cas9-mediated LMNA disruption perturbated nuclear volume during hTSCs syncytialization. Overall, our results not only provide an interesting insight into mechanisms underlying nuclear enlargement during primary syncytialization but highlight the hTSCs as an indispensable model in understanding human trophoblast differentiation during implantation.

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