Related Experiment Video

Updated: Sep 14, 2025

Homogeneous Time-resolved Förster Resonance Energy Transfer-based Assay for Detection of Insulin Secretion
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Homogeneous Time-resolved Förster Resonance Energy Transfer-based Assay for Detection of Insulin Secretion

Published on: May 10, 2018

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TSC22D1 is a newly identified inhibitor of insulin secretion in pancreatic beta cells

Sümbül Yıldırım1,2,3,4, Amit Mhamane3,4, Svenja Lösch1,3,4

  • 1Department of Endocrinology and Metabolism, Joint Heidelberg IDC Translational Diabetes Program, Heidelberg University Hospital, Heidelberg, Germany.

The FEBS Journal
|July 18, 2025
PubMed

Insights

Researchers discovered that the TSC22D1 protein regulates pancreatic beta cell function and insulin secretion. This finding offers new insights into potential treatments for diabetes mellitus.

Area of Science:

  • Endocrinology
  • Molecular Biology
  • Cell Biology

Background:

  • Pancreatic beta cell dysfunction causes high blood glucose levels, leading to diabetes mellitus, a major global health issue.
  • Identifying molecular regulators of beta cell function is crucial for developing novel antidiabetic therapies.

Purpose of the Study:

  • To identify novel regulators of pancreatic beta cell function.
  • To investigate the role of the transforming growth factor β-1 stimulated clone D1 (TSC22D1) protein in beta cell function and glucose homeostasis.

Main Methods:

  • Utilized INS-1E rat insulinoma cell line for experiments.
  • Performed gene expression analysis (RNA-Seq) and protein-protein interaction studies (interactome analysis).
  • Assessed glucose-stimulated insulin secretion and intracellular insulin content.

Main Results:

  • Depletion of TSC22D1 enhanced key beta cell identity genes (Ins1, Ins2, Pdx1, Slc2a2, Nkx6.1) and promoted glucose-stimulated insulin secretion.
  • Demonstrated a reciprocal interaction and regulation between TSC22D1 and Forkhead box protein O1 (FoxO1).
  • Identified TSC22D1's critical role in glucose-responsive processes like mRNA processing, ribonucleoprotein complex biogenesis, and Golgi vesicle transport.

Conclusions:

  • TSC22D1 is a novel, evolutionarily conserved regulator of pancreatic beta cell function.
  • TSC22D1 influences beta cell function at multiple molecular and cellular levels.
  • Targeting TSC22D1 may offer therapeutic potential for metabolic diseases, including diabetes mellitus.
Keywords:
FoxO1TSC22D1pancreatic beta cells and insulin secretion

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