2. Academic Validation
  3. Terminal differentiation of villus tip enterocytes is governed by distinct Tgfβ superfamily members

Terminal differentiation of villus tip enterocytes is governed by distinct Tgfβ superfamily members

  • EMBO Rep. 2023 Jul 26;e56454. doi: 10.15252/embr.202256454.
Linda Berková 1,  Hassan Fazilaty 2,  Qiutan Yang 3 4 5 6 7,  Jan Kubovčiak 8,  Monika Stastna 1,  Dusan Hrckulak 1,  Martina Vojtechova 1,  Tosca Dalessi 2,  Michael David Brügger 2,  George Hausmann 2,  Prisca Liberali 3,  Vladimir Korinek 1,  Konrad Basler 2,  Tomas Valenta 1 2
Affiliations

Affiliations

  • 1 Laboratory of Cell and Developmental Biology, Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czech Republic.
  • 2 Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland.
  • 3 Friedrich Miescher Institute for Biomedical Research (FMI), Basel, Switzerland.
  • 4 State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.
  • 5 Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China.
  • 6 Beijing Institute for Stem Cell and Regenerative Medicine, Beijing, China.
  • 7 University of Chinese Academy of Sciences, Beijing, China.
  • 8 Laboratory of Genomics and Bioinformatics, Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czech Republic.
PMID: 37493498 DOI: 10.15252/embr.202256454
Abstract

The protective and absorptive functions of the intestinal epithelium rely on differentiated enterocytes in the villi. The differentiation of enterocytes is orchestrated by sub-epithelial mesenchymal cells producing distinct ligands along the villus axis, in particular Bmps and Tgfβ. Here, we show that individual Bmp ligands and Tgfβ drive distinct enterocytic programs specific to villus zonation. Bmp4 is expressed from the centre to the upper part of the villus and activates preferentially genes connected to lipid uptake and metabolism. In contrast, Bmp2 is produced by villus tip mesenchymal cells and it influences the adhesive properties of villus tip epithelial cells and the expression of immunomodulators. Additionally, Tgfβ induces epithelial gene expression programs similar to those triggered by Bmp2. Bmp2-driven villus tip program is activated by a canonical BMP Receptor type I/Smad-dependent mechanism. Finally, we establish an Organoid cultivation system that enriches villus tip enterocytes and thereby better mimics the cellular composition of the intestinal epithelium. Our data suggest that not only a Bmp gradient but also the activity of individual Bmp drives specific enterocytic programs.

Keywords

Tgfβ / Bmp signalling; enterocytes; epithelial differentiation; intestinal mesenchymal cells; small intestine.

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