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Related Concept Videos

Glucose Homeostasis: Pancreatic Islets and Insulin Secretion01:27

Glucose Homeostasis: Pancreatic Islets and Insulin Secretion

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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.
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Insulin Secretory Vesicles01:05

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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...
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Cells and Secretions of the Pancreas01:16

Cells and Secretions of the Pancreas

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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.
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A Method for Mouse Pancreatic Islet Isolation and Intracellular cAMP Determination
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microRNAs in Pancreatic β-Cell Physiology.

Sabire Özcan1

  • 1Department of Molecular and Cellular Biochemistry, College of Medicine, University of Kentucky, 741 S. Limestone Street, BBSRB-155, Lexington, KY, 40536, USA. sozcan@uky.edu.

Advances in Experimental Medicine and Biology
|December 15, 2015
PubMed
Summary

MicroRNAs regulate pancreatic beta-cell function, impacting insulin secretion and glucose homeostasis. These molecules are key to understanding and potentially treating diabetes mellitus.

Keywords:
Ago2DiabetesDicer1Endocrine pancreasInsulinInsulin biosynthesisInsulin secretionIsletsmiRNAβ-Cellβ-Cell failure

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Area of Science:

  • Endocrinology
  • Molecular Biology
  • Genetics

Background:

  • Pancreatic beta-cells produce and secrete insulin, crucial for maintaining blood glucose homeostasis.
  • Dysfunctional beta-cells lead to hyperglycemia and diabetes mellitus.
  • MicroRNAs (miRNAs) are emerging regulators of beta-cell function.

Purpose of the Study:

  • To review the role of miRNAs in pancreatic beta-cell physiology.
  • To highlight miRNAs involved in beta-cell development, insulin regulation, and expansion.
  • To discuss the clinical significance of beta-cell enriched miRNAs in diabetes treatment.

Main Methods:

  • Literature review focusing on miRNAs in pancreatic beta-cells.
  • Analysis of studies investigating miRNA regulation of beta-cell function.
  • Examination of research on circulating miRNAs as potential diabetes biomarkers.

Main Results:

  • miRNAs are critical for endocrine pancreas development and beta-cell function.
  • Specific miRNAs regulate insulin biosynthesis and exocytosis.
  • Certain beta-cell specific miRNAs may serve as early biomarkers for prediabetes.

Conclusions:

  • miRNAs play multifaceted roles in beta-cell physiology.
  • Targeting miRNAs offers potential therapeutic strategies for diabetes.
  • Circulating miRNAs show promise for early diabetes detection.