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A BAFfling link between the β cell nucleolus, islet immune microenvironment, and type 2 diabetes
Anna B Osipovich1, Mark A Magnuson1
1Department of Molecular Physiology and Biophysics and Center for Stem Cell Biology, Vanderbilt University, Nashville, TN, USA.
Developmental Cell
|May 13, 2026
Summary
Inflammation worsens type 2 diabetes by impairing beta cells. A study reveals BAF60C in beta cells stabilizes Reg3b mRNA, suppressing inflammation through macrophage signaling.
Area of Science:
- Cell biology
- Immunology
- Endocrinology
Background:
- Inflammation is a key factor in type 2 diabetes mellitus (T2D) pathogenesis.
- Inflammation negatively impacts pancreatic beta cell function and insulin resistance.
- This leads to increased insulin demand and disease progression.
Purpose of the Study:
- To investigate the molecular mechanisms by which beta cells regulate inflammation in T2D.
- To identify key factors involved in the crosstalk between beta cells and immune cells.
Main Methods:
- Analysis of SWI/SNF complex subunit BAF60C expression and function in beta cells.
- Investigation of Reg3b mRNA stability and its role in paracrine signaling.
- Assessment of inflammatory responses in macrophages.
Main Results:
- BAF60C was identified as a crucial subunit of the SWI/SNF complex in beta cells.
- BAF60C stabilizes Reg3b mRNA, promoting its expression.
- Reg3b secreted by beta cells suppresses inflammation in macrophages via paracrine signaling.
Conclusions:
- BAF60C plays a protective role in beta cells by mitigating inflammation.
- Stabilization of Reg3b mRNA by BAF60C is a novel mechanism for controlling inflammation in T2D.
- Targeting BAF60C or Reg3b may offer therapeutic strategies for T2D.
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