The postnatal pancreatic microenvironment guides β cell maturation through BMP4 production

Lina Sakhneny, Laura Mueller, Anat Schonblum, Sivan Azaria, Guzel Burganova, Alona Epshtein, Abigail Isaacson, Heather Wilson, Francesca M. Spagnoli, Limor Landsman*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Glucose homeostasis depends on regulated insulin secretion from pancreatic β cells, which acquire their mature phenotype postnatally. The functional maturation of β cells is regulated by a combination of cell-autonomous and exogenous factors; the identity of the latter is mostly unknown. Here, we identify BMP4 as a critical component through which the pancreatic microenvironment regulates β cell function. By combining transgenic mouse models and human iPSCs, we show that BMP4 promotes the expression of core β cell genes and is required for proper insulin production and secretion. We identified pericytes as the primary pancreatic source of BMP4, which start producing this ligand midway through the postnatal period, at the age β cells mature. Overall, our findings show that the islet niche directly promotes β cell functional maturation through the timely production of BMP4. Our study highlights the need to recapitulate the physiological postnatal islet niche for generating fully functional stem-cell-derived β cells for cell replacement therapy for diabetes.

Original languageEnglish
Pages (from-to)2703-2711.e5
JournalDevelopmental Cell
Volume56
Issue number19
DOIs
Publication statusPublished - 11 Oct 2021

Keywords

  • Beta cells
  • beta-cell maturity
  • BMP4
  • BMPR1A
  • cell maturation
  • islet pericytes
  • islet vascularture
  • pancreatic pericytes
  • pericytes
  • stem-cell derived beta cells

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