Wfs1 loss-of-function disrupts the composition of mouse pancreatic endocrine cells from birth and impairs Glut2 localization to cytomembrane in pancreatic β cells

Biochem Biophys Res Commun. 2023 May 28:658:80-87. doi: 10.1016/j.bbrc.2023.03.074. Epub 2023 Mar 31.

Abstract

Wfs1 is an endoplasmic reticulum (ER) membrane located protein highly expressed in pancreatic β cells and brain. Wfs1 deficiency causes adult pancreatic β cells dysfunction following β cells apoptosis. Previous studies mainly focus on the Wfs1 function in adult mouse pancreatic β cells. However, whether Wfs1 loss-of-function impairs mouse pancreatic β cell from its early development is unknown. In our study, Wfs1 deficiency disrupts the composition of mouse pancreatic endocrine cells from early postnatal day 0 (P0) to 8 weeks old, with decreased percentage of β cells and increased percentage of α and δ cells. Meanwhile, Wfs1 loss-of-function leads to reduced intracellular insulin content. Notably, Wfs1 deficiency impairs Glut2 localization and causes the accumulation of Glut2 in mouse pancreatic β cell cytoplasm. In Wfs1-deficient mice, glucose homeostasis is disturbed from early 3 weeks old to 8 weeks old. This work reveals that Wfs1 is significantly required for the composition of pancreatic endocrine cells and is essential for Glut2 localization in mouse pancreatic β cells.

Keywords: Glut2; Insulin; Pancreatic β cells; Wfs1.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Endoplasmic Reticulum / metabolism
  • Insulin / metabolism
  • Insulin-Secreting Cells* / metabolism
  • Loss of Function Mutation
  • Membrane Proteins* / genetics
  • Mice
  • Wolfram Syndrome* / metabolism

Substances

  • Insulin
  • wolframin protein
  • Membrane Proteins