Related Experiment Video
Updated: Nov 9, 2025

09:45
An In Vitro Protocol for Evaluating MicroRNA Levels, Functions, and Associated Target Genes in Tumor Cells
Published on: May 21, 2019
8.6K
Role of microRNA in pancreatic beta cell function
1Department of Fundamental Neurosciences, University of Lausanne, Lausanne, Switzerland; Department of Biomedical Sciences, University of Lausanne, Lausanne, Switzerland.
International Review of Cell and Molecular Biology
|April 9, 2021
Summary
MicroRNAs (miRNAs) regulate gene expression and are vital for beta cell function. Their dysregulation impairs insulin production, contributing to diabetes development.
Area of Science:
- Molecular Biology
- Genetics
- Endocrinology
Background:
- MicroRNAs (miRNAs) are small non-coding RNAs that regulate gene expression.
- Emerging evidence highlights miRNAs as critical regulators of pancreatic beta cell physiology.
- These molecules play a key role in maintaining beta cell function and phenotype.
Purpose of the Study:
- To elucidate the role of miRNAs in beta cell differentiation and function.
- To understand how miRNA dysregulation impacts beta cell physiology.
- To explore the connection between miRNA dysfunction and diabetes mellitus.
Main Methods:
- Analysis of miRNA expression profiles in beta cells.
- Functional studies investigating miRNA targets.
- Correlation of miRNA dysregulation with diabetes models.
Main Results:
- miRNAs are essential for the precise regulation of gene expression during beta cell differentiation.
- miRNAs contribute to the development and maintenance of the beta cell phenotype.
- Altered miRNA expression is linked to beta cell dysfunction.
Conclusions:
- MicroRNAs are indispensable for normal beta cell function and insulin production.
- Dysregulation of miRNAs in beta cells is implicated in the pathogenesis of diabetes mellitus.
- Targeting miRNAs may offer therapeutic strategies for diabetes.
Related Concept Videos
MicroRNAs
3.4K
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
3.4K
MicroRNAs
22.8K
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After...
22.8K
Cells and Secretions of the Pancreas
3.6K
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...
3.6K
Insulin Secretory Vesicles
6.1K
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...
6.1K
Glucose Homeostasis: Pancreatic Islets and Insulin Secretion
1.7K
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...
1.7K
Hormones Regulating Blood Glucose
5.4K
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...
5.4K

