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Updated: Jul 30, 2025
09:33
Generation of Scaffold-free, Three-dimensional Insulin Expressing Pancreatoids from Mouse Pancreatic Progenitors In Vitro
Published on: June 2, 2018
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Rab11 is essential to pancreas morphogenesis, lumen formation and endocrine mass
Haley R Barlow1, Neha Ahuja1, Tyler Bierschenk1
1Department of Molecular Biology, Center for Regenerative Science and Medicine, USA.
Developmental Biology
|May 12, 2023
Summary
Rab11 proteins are crucial for pancreas development, regulating epithelial lumen formation and organ morphogenesis. Their absence causes developmental defects and impaired endocrine function in mice.
Area of Science:
- Developmental Biology
- Cell Biology
- Molecular Biology
Background:
- Pancreas development involves complex morphogenesis and cell lineage differentiation.
- Proper epithelial lumen formation is essential for pancreatic development.
- The role of Rab GTPase Rab11 in pancreas development in vivo is largely unknown.
Purpose of the Study:
- To investigate the in vivo function of Rab11 isoforms (Rab11A and Rab11B) in pancreas development.
- To determine the impact of Rab11 deletion on pancreatic morphogenesis and endocrine function.
Main Methods:
- Generation of Rab11-deficient pancreatic epithelium mouse model (Rab11pancDKO).
- Analysis of embryonic and adult mouse phenotypes, including survival, endocrine function, and epithelial morphology.
- Investigation of cellular mechanisms underlying morphogenetic defects, focusing on vesicle trafficking.
Main Results:
- Co-deletion of Rab11A and Rab11B leads to significant neonatal lethality and defective endocrine function in surviving mice.
- Rab11 deficiency causes severe pancreatic epithelial morphogenesis defects, including impaired lumen formation and interconnection.
- Loss of Rab11 disrupts apical membrane initiation site coordination and causes ectopic lumen formation.
- Defects are linked to impaired vesicle trafficking, trapping apical and junctional components within cells.
Conclusions:
- Rab11 is essential for proper pancreas development, regulating epithelial lumen formation and morphogenesis.
- The study links intracellular vesicle trafficking to organ morphogenesis in vivo.
- Presents a novel framework for understanding pancreatic development through the lens of Rab11 function.
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