Related Experiment Videos
Cell proliferation in the exocrine pancreas during development
1Department of Human Biology, School of Community Health, Curtin University of Technology, Bentley, Australia.
Journal of Anatomy
|December 1, 1989
Summary
In developing rat pancreas, mononucleate acinar cells proliferate actively, while binucleate acinar cells remain static. Ductule cells contribute to acinus formation until weaning.
Area of Science:
- Cell Biology
- Developmental Biology
- Gastroenterology
Background:
- Pancreatic acinar cells exist as mononucleate and binucleate forms.
- Understanding cell proliferation dynamics is crucial for pancreatic development.
Purpose of the Study:
- To investigate the proliferation rates of ductule, mononucleate acinar, and binucleate acinar cells in developing rat pancreas.
- To determine the roles of these cell types in pancreatic growth and acinus formation.
Main Methods:
- Autoradiography using tritiated thymidine in vivo.
- Assessment of cell proliferation in intact pancreas and isolated acinar cells.
- Sampling at multiple time points from 5 to 49 days of age.
Main Results:
- Mononucleate acinar cells showed significantly higher DNA synthesis (3-10 fold) than binucleate acinar cells throughout development.
- Ductule cell proliferation was high in early development (5-17 days) and decreased to adult levels after weaning.
- The acinar cell population shifted from predominantly mononucleate at birth to binucleate after weaning.
Conclusions:
- Acinus formation up to weaning involves ductule cell differentiation and mononucleate acinar cell proliferation.
- Post-weaning, mononucleate acinar cells continue to divide, potentially forming binucleate cells or continuing mononucleate division.
- Mononucleate acinar cells are proliferative, whereas binucleate acinar cells appear to be terminally differentiated and non-dividing.