Related Experiment Video
Updated: Mar 28, 2026
05:38
Isolating and Analyzing Cells of the Pancreas Mesenchyme by Flow Cytometry
Published on: January 28, 2017
12.9K
Evolving function and potential of pancreatic alpha cells
Violeta Stanojevic1, Joel F Habener1
1Laboratory of Molecular Endocrinology, Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA.
Best Practice & Research. Clinical Endocrinology & Metabolism
|December 24, 2015
Summary
Recent discoveries reveal alpha cells can transform into beta cells, offering new diabetes treatment avenues. Impaired glucagon signaling enhances alpha cell mass, providing more cells for potential beta cell regeneration.
Area of Science:
- Endocrinology
- Cell Biology
- Diabetes Research
Background:
- Alpha cells produce glucagon, a hormone linked to hyperglycemia and diabetes.
- The precise functions of alpha cells and glucagon's role in diabetes have been historically unclear.
- Recent research, primarily in mice, has illuminated novel functions of alpha cells.
Purpose of the Study:
- To review recent discoveries regarding alpha cell functions and their implications for diabetes.
- To explore the potential of alpha cell trans-differentiation into beta cells for therapeutic purposes.
- To discuss the role of glucagon signaling in regulating alpha and beta cell populations.
Main Methods:
- Review of recent scientific literature focusing on alpha cell biology and diabetes.
- Analysis of findings from studies, predominantly in mouse models.
- Discussion of the implications of impaired glucagon signaling on islet cell dynamics.
Main Results:
- Alpha cells can trans-differentiate into insulin-producing beta cells.
- Alpha cells possess an intrinsic system for generating GLP-1, supporting beta cell health and mass.
- Impaired glucagon signaling prevents diabetes development and increases alpha cell mass, suggesting a source for beta cell regeneration.
Conclusions:
- Alpha cells act as crucial 'guardian' cells for beta cells.
- The plasticity of alpha cells and their response to glucagon signaling offer promising therapeutic targets for diabetes.
- Further research into alpha cell trans-differentiation could lead to novel diabetes treatments.
Related Concept Videos
01:16Cells and Secretions of the Pancreas
11.8K
The pancreas, a vital organ within the abdominal cavity, plays dual roles in the digestive and endocrine systems, collaborating with exocrine and endocrine cells to maintain optimal digestion and blood sugar levels.
Exocrine function is carried out by acinar cells, organized into clusters known as acini. These cells contribute to digestion by releasing substantial quantities of enzyme-rich, alkaline digestive juices.
Concurrently, the dispersed clusters of endocrine cells throughout the...
Exocrine function is carried out by acinar cells, organized into clusters known as acini. These cells contribute to digestion by releasing substantial quantities of enzyme-rich, alkaline digestive juices.
Concurrently, the dispersed clusters of endocrine cells throughout the...
11.8K
01:27Glucose Homeostasis: Pancreatic Islets and Insulin Secretion
3.1K
The pancreatic islets comprising only 1%-2% of the volume are highly vascularized and innervated mini-organs. They contain five endocrine cell types, including β cells that secrete insulin, which is synthesized as a single polypeptide chain, preproinsulin, processed to proinsulin, and finally to insulin and C-peptide. This process is complex and regulated, involving the Golgi complex, the endoplasmic reticulum, and the secretory granules of the β cell.
Insulin and C-peptide are...
Insulin and C-peptide are...
3.1K
01:16Hormones Regulating Blood Glucose
8.4K
Insulin is released by beta cells of the pancreas when blood glucose levels are high. It facilitates glucose absorption and utilization in insulin-dependent cells with insulin receptors on their plasma membranes. Insulin promotes glucose uptake by increasing the number of glucose transport proteins in the cell membrane, allowing glucose to enter the cell. As a result, glucose utilization and ATP production are enhanced.
In addition to accelerating glucose uptake and utilization, insulin has...
In addition to accelerating glucose uptake and utilization, insulin has...
8.4K
01:05Insulin Secretory Vesicles
7.4K
Insulin secretory vesicles release insulin to stimulate blood glucose uptake and regulate carbohydrate metabolism. When the blood glucose levels increase, glucose enters the pancreatic β-islet cells through glucose transporters. Once inside, glucose is metabolized through glycolysis, the citric acid cycle, and the electron transport chain, producing ATP. This increase in ATP concentration closes ATP-sensitive potassium channels, leading to depolarization of the membrane and the opening of...
7.4K
01:26Pancreatic Juice and Secretion
3.6K
Pancreatic juice is a clear fluid produced by the pancreas, containing water, salts, sodium bicarbonate, and enzymes vital for digestion in the small intestine. It helps break down large molecules, facilitating nutrient absorption.
When acidic chyme from the stomach enters the duodenum, it triggers the release of secretin, a hormone that prompts pancreatic juice secretion. After a fatty meal, cholecystokinin, another hormone, stimulates gallbladder contraction and enhances enzyme-rich...
When acidic chyme from the stomach enters the duodenum, it triggers the release of secretin, a hormone that prompts pancreatic juice secretion. After a fatty meal, cholecystokinin, another hormone, stimulates gallbladder contraction and enhances enzyme-rich...
3.6K
01:19Pancreas
3.1K
The pancreas, an essential organ in the human body, is a pinkish-gray elongated structure located posterior to the stomach. It extends laterally from the duodenum towards the spleen and is firmly bound to the posterior wall of the abdominal cavity. The organ's surface has a lumpy, lobular texture that gives it a unique appearance.
The broad head of the pancreas lies within the loop formed by the duodenum, while its slender body reaches towards the spleen. The tail of the pancreas is short...
The broad head of the pancreas lies within the loop formed by the duodenum, while its slender body reaches towards the spleen. The tail of the pancreas is short...
3.1K