Cell Reports
Volume 32, Issue 11, 15 September 2020, 108141
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Adipocyte Reprogramming by the Transcriptional Coregulator GPS2 Impacts Beta Cell Insulin Secretion

https://doi.org/10.1016/j.celrep.2020.108141Get rights and content
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Highlights

  • GPS2 expression in adipose tissue is associated with insulin secretion rate in humans

  • Loss of GPS2 in adipocytes impacts on insulin secretion upon diet-induced obesity

  • Beta cell dysfunction in Gps2 KO mice is governed by islet inflammation

  • This beta cell maladaptation in Gps2 KO mice is mediated by adipose tissue secretome

Summary

Glucose homeostasis is maintained through organ crosstalk that regulates secretion of insulin to keep blood glucose levels within a physiological range. In type 2 diabetes, this coordinated response is altered, leading to a deregulation of beta cell function and inadequate insulin secretion. Reprogramming of white adipose tissue has a central role in this deregulation, but the critical regulatory components remain unclear. Here, we demonstrate that expression of the transcriptional coregulator GPS2 in white adipose tissue is correlated with insulin secretion rate in humans. The causality of this relationship is confirmed using adipocyte-specific GPS2 knockout mice, in which inappropriate secretion of insulin promotes glucose intolerance. This phenotype is driven by adipose-tissue-secreted factors, which cause increased pancreatic islet inflammation and impaired beta cell function. Thus, our study suggests that, in mice and in humans, GPS2 controls the reprogramming of white adipocytes to influence pancreatic islet function and insulin secretion.

Keywords

type 2 diabetes
adipose tissue
organ crosstalk
pancreas
beta cells
insulin
transcriptional coregulator
G protein pathway suppressor 2
GPS2

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