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ISL1 controls pancreatic alpha cell fate and beta cell maturation
Romana Bohuslavova1, Valeria Fabriciova2, Laura Lebrón-Mora2
1Laboratory of Molecular Pathogenetics, Institute of Biotechnology CAS, 25250, Vestec, Czechia. romana.bohuslavova@ibt.cas.cz.
The transcription factor ISL1 is crucial for generating functional pancreatic alpha and beta cells. Its elimination disrupts cell development and leads to a diabetic phenotype, highlighting its role in glucose homeostasis.
Area of Science:
- Endocrinology
- Developmental Biology
- Molecular Biology
Background:
- Glucose homeostasis relies on functional pancreatic alpha and beta cells.
- The precise mechanisms governing the development and maturation of these endocrine cells are not fully understood.
Purpose of the Study:
- To elucidate the molecular role of ISL1 in regulating alpha cell fate.
- To investigate ISL1's function in the development of functional beta cells within the pancreas.
Main Methods:
- Utilized transgenic mouse models.
- Performed transcriptomic and epigenomic profiling.
- Analyzed gene expression and histone modifications.
Main Results:
- ISL1 elimination resulted in a diabetic phenotype and complete loss of alpha cells.
- Disrupted pancreatic islet architecture and downregulated key beta-cell regulators were observed.
- An enrichment of intermediate endocrine progenitor transcriptomic profiles was detected.
Conclusions:
- ISL1 controls alpha cell fate and beta cell maturation both transcriptionally and epigenetically.
- Altered H3K27me3 histone modifications were found in essential endocrine differentiation gene promoters upon ISL1 elimination.
- ISL1 is a critical factor for generating functional pancreatic alpha and beta cells.
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