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Suppression of FoxO1/cell death-inducing DNA fragmentation factor α-like effector A (Cidea) axis protects mouse

Naoki Omae1, Minoru Ito, Syoko Hase

  • 1Discovery Research Laboratories, Kyorin Pharmaceutical Co., Ltd., 2399-1 Nogi-machi, Shimotsuga-gun, Tochigi 329-0114, Japan.

Molecular and Cellular Endocrinology
|September 28, 2011
PubMed

Insights

Free fatty acids trigger pancreatic cell death, contributing to type 2 diabetes. This study reveals Cidea as a key mediator of this apoptosis, offering a potential therapeutic target.

Area of Science:

  • Cell Biology
  • Endocrinology
  • Metabolic Diseases

Background:

  • Chronic free fatty acid (FFA) exposure induces pancreatic β-cell apoptosis, a key factor in type 2 diabetes development.
  • The cell death-inducing DNA fragmentation factor α-like effector (CIDE) family is implicated in obesity-related type 2 diabetes.

Purpose of the Study:

  • To investigate the role of CIDE family members, specifically Cidea, in FFA-induced pancreatic β-cell apoptosis.
  • To identify the regulatory pathway involving FoxO1 and Cidea in this process.

Main Methods:

  • Assessing Cidea, Cideb, and Cidec expression in response to FFA exposure.
  • Evaluating the impact of Cidea suppression on palmitic acid-induced apoptosis.
  • Investigating the effect of FoxO1 suppression on Cidea upregulation and apoptosis.

Main Results:

  • Apoptosis-inducing FFAs, particularly palmitic acid, strongly upregulated Cidea expression, correlating positively with apoptosis.
  • Cideb and Cidec expression showed weak correlations with apoptosis.
  • Suppression of Cidea significantly inhibited palmitic acid-induced apoptosis.
  • Suppression of FoxO1 blocked palmitic acid-induced Cidea upregulation and subsequent apoptosis.

Conclusions:

  • Cidea acts as a critical regulator of FFA-induced β-cell apoptosis, functioning as a downstream target of FoxO1.
  • Targeting Cidea presents a promising therapeutic strategy for preventing β-cell loss in type 2 diabetes.

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