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Conditional Tissue-Specific Foxa2 Ablation in Mouse Pancreas Causes Hyperinsulinemic Hypoglycemia: RETRACTED
Zengbin Wu1, Aihua Fei, Yingbin Liu
1Departments of 1Emergency and 2General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
American Journal of Therapeutics
|March 14, 2017
Summary
Foxa2 deletion in pancreatic cells disrupts alpha and beta cell development, leading to altered insulin and glucagon levels and hypoglycemia. This mouse model aids in understanding diabetes regulation.
Area of Science:
- Endocrinology and Metabolism
- Developmental Biology
- Genetics
Background:
- Foxa2 (forkhead/winged helix transcription factor) is a key regulator of Pdx1, essential for pancreatic development.
- Understanding Foxa2's role in alpha- and beta-cell differentiation is crucial for metabolic disease research.
Purpose of the Study:
- To investigate the role of Foxa2 in pancreatic alpha- and beta-cell development using a conditional knockout model.
- To analyze the impact of Foxa2 deletion on plasma glucose, insulin, and glucagon levels.
Main Methods:
- Generated conditional Pdx1-driven Foxa2 knockout mice (homozygous and heterozygous).
- Utilized immunofluorescence microscopy for cell mass analysis and Pdx1 lineage tracing.
- Measured plasma glucose, insulin, and glucagon levels via chemiluminescence assays.
Main Results:
- Foxa2 ablation altered alpha- and beta-cell density, shifting the beta/alpha cell ratio.
- Heterozygous mutants showed lower insulin levels; homozygous mutants exhibited profound hypoglucagonemia and hypoglycemia.
- Foxa2 deletion led to inappropriate hyperinsulinemia in homozygous mutants.
Conclusions:
- Homozygous Foxa2 ablation causes significant metabolic dysregulation, including altered hormone levels and hypoglycemia.
- The developed conditional Foxa2 knockout mouse model is valuable for studying alpha- and beta-cell differentiation.
- This model can help identify novel therapeutic targets for diabetes control.
