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May 6, 2026Diabetes0 citations

CHD4 and NKX2.2 Cooperate to Regulate β-Cell Function by Repressing Non–β-Cell Gene Programs

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DSDylan SarbaughTOThais OliveiraMGMichelle A. Guney

Key Points

  • This research aims to understand how CHD4 and NKX2.2 regulate β-cell function in the pancreas.
  • Investigated the interaction between NKX2.2 and CHD4
  • Analysed β-cell function in mice with deleted CHD4
  • Examined the effects on calcium signaling and insulin secretion
  • Assessed GIRK4 potassium channel regulation
  • CHD4 deletion leads to diabetes due to loss of islet integrity
  • Disrupted calcium signaling found in CHD4-deficient β-cells
  • Impaired insulin secretion observed in conditions lacking CHD4
  • Inhibition of GIRK4 rescues the insulin secretion defect

Abstract

ARTICLE HIGHLIGHTS: NKX2.2 interacts with the nucleosome remodeling and deacetylase complex through its interaction with chromodomain helicase DNA-binding protein 4 (CHD4). Deletion of CHD4 from developing pancreatic β-cells in mice causes diabetes due to a loss of islet integrity, disrupted calcium signaling, and impaired insulin secretion. β-cells lacking CHD4 inappropriately upregulate the G protein-activated inward rectifier potassium channel 4 (GIRK4) potassium channel; inhibition of GIRK4 rescues the insulin secretion defect.

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Cite This Study

Sarbaugh et al. (2026) studied this question.

synapsesocial.com/papers/69fa8eca04f884e66b5313cfhttps://doi.org/10.2337/db25-0945
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