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Published on: August 7, 2015
[Physiological role of pancreatic D-cells (mathematical study)]
Biulleten' Eksperimental'Noi Biologii I Meditsiny
|July 1, 1988
Summary
Mathematical simulations reveal pancreatic D cells conserve resources by regulating B and A cells. They significantly suppress insulin at low glucose but boost glucagon at high glucose, proving vital for islet function.
Area of Science:
- Endocrinology
- Computational Biology
- Cell Physiology
Context:
- Pancreatic islets contain diverse cell types, including D cells, which secrete somatostatin.
- The interplay between pancreatic endocrine cells is crucial for glucose homeostasis.
- Mathematical modeling is a powerful tool for dissecting complex physiological systems.
Purpose:
- To elucidate the physiological role of pancreatic D cells using mathematical simulation.
- To quantify the effects of D cell-derived somatostatin on insulin and glucagon secretion.
- To understand the necessity of D cells for overall islet function.
Summary:
- Pancreatic D cells exert a sparing effect on B and A cells, leading to more economical secretory responses.
- Somatostatin from D cells substantially suppresses insulin secretion at low glucose concentrations but has minimal effect at high concentrations.
- Conversely, D cells significantly enhance glucagon secretion at high glucose concentrations, with a lesser effect at low concentrations.
Impact:
- D cells are essential for the Langerhans islets to function as a regulatory organ for fuel deposition and mobilization.
- This study highlights the complex, concentration-dependent regulatory roles of D cells in pancreatic endocrine function.
- Mathematical simulations provide critical insights into the dynamic interactions within the pancreatic islet microenvironment.
