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Related Concept Videos

Insulin Secretory Vesicles01:05

Insulin Secretory Vesicles

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...
Glucose Homeostasis: Pancreatic Islets and Insulin Secretion01:27

Glucose Homeostasis: Pancreatic Islets and Insulin Secretion

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 co-secreted in...

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Related Experiment Video

Updated: Jun 2, 2026

Scaffold-supported Transplantation of Islets in the Epididymal Fat Pad of Diabetic Mice
11:57

Scaffold-supported Transplantation of Islets in the Epididymal Fat Pad of Diabetic Mice

Published on: July 23, 2017

Matrix components and scaffolds for sustained islet function.

Jennifer Y C Cheng1, Michael Raghunath, John Whitelock

  • 1Graduate School of Biomedical Engineering, University of New South Wales, Sydney, Australia. jennifer.cheng@student.unsw.edu.au

Tissue Engineering. Part B, Reviews
|April 12, 2011
PubMed
Summary
This summary is machine-generated.

Islet transplantation for diabetes faces low survival rates due to isolation from native environments. Understanding islet extracellular matrix (ECM) is crucial for improving survival and developing bioartificial pancreases.

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Published on: November 5, 2016

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Last Updated: Jun 2, 2026

Scaffold-supported Transplantation of Islets in the Epididymal Fat Pad of Diabetic Mice
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Published on: July 23, 2017

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Sustained Administration of β-cell Mitogens to Intact Mouse Islets Ex Vivo Using Biodegradable Poly(lactic-co-glycolic acid) Microspheres

Published on: November 5, 2016

Area of Science:

  • Endocrinology
  • Biomaterials Science
  • Regenerative Medicine

Background:

  • Islet transplantation for diabetes is hindered by poor islet survival rates post-transplantation.
  • Islet isolation disrupts crucial interactions with the native microenvironment, including the extracellular matrix (ECM).
  • The composition and function of the islet ECM are poorly understood, limiting scaffold engineering efforts.

Purpose of the Study:

  • To review current knowledge of islet ECM composition and its role in islet survival, proliferation, and function.
  • To evaluate the effects of in vitro simulations of the native islet scaffold.
  • To provide a foundation for developing a sustainable bioartificial pancreas.

Main Methods:

  • Literature review of islet ECM composition and function.
  • Analysis of existing research on islet-ECM interactions.
  • Evaluation of in vitro models simulating islet ECM.

Main Results:

  • The ECM provides essential biomolecular cues vital for islet cell health and function.
  • Disruption of ECM interactions during isolation negatively impacts islet survival.
  • In vitro models offer insights into recreating native islet microenvironments.

Conclusions:

  • A comprehensive understanding of islet ECM is essential for advancing islet transplantation.
  • Targeting ECM-related cues could significantly improve islet survival and therapeutic efficacy.
  • Developing effective bioartificial pancreases requires recapitulating the native islet ECM environment.