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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...
Insulin: Biosynthesis, Chemistry, and Preparation01:25

Insulin: Biosynthesis, Chemistry, and Preparation

The endoplasmic reticulum (ER) of pancreatic β-cells synthesizes preproinsulin, which consists of a signal peptide, A and B chains, and a C-peptide. Preproinsulin is then cleaved and folded into proinsulin, which translocates to the Golgi apparatus for sorting and packaging into secretory granules. In these granules, enzymatic clipping generates insulin and C-peptide.
Damage or functional impairment of β-cells inhibits insulin production, leading to diabetes. Diabetes treatment primarily uses...

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Related Experiment Video

Updated: May 11, 2026

Surface Engineering of Pancreatic Islets with a Heparinized StarPEG Nanocoating
05:35

Surface Engineering of Pancreatic Islets with a Heparinized StarPEG Nanocoating

Published on: June 23, 2018

Islet encapsulation: advances and obstacles.

G C Weir1

  • 1Section on Islet Cell Biology and Regenerative Medicine, Joslin Diabetes Center, One Joslin Place, Boston, MA 02215, USA. gordon.weir@joslin.harvard.edu

Diabetologia
|May 3, 2013
PubMed
Summary
This summary is machine-generated.

Encapsulating human islets in alginate shows promise for type 1 diabetes treatment. This method protects transplanted beta cells from immune attack, offering a potential path to safe and effective cell therapy.

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Area of Science:

  • Biomedical Engineering
  • Immunology
  • Endocrinology

Background:

  • Islet encapsulation protects transplanted cells from immune rejection in rodents.
  • Translating this success to humans and large animals has been challenging.
  • Type 1 diabetes involves autoimmune destruction of insulin-producing beta cells.

Purpose of the Study:

  • To evaluate the efficacy of alginate-encapsulated human islets for type 1 diabetes treatment.
  • To assess the survival and function of encapsulated islets in both animal models and human patients.

Main Methods:

  • Human islets were encapsulated in alginate hydrogels.
  • Encapsulated islets were transplanted into the peritoneal cavity of mice.
  • Functional assessment of encapsulated islets in a human patient with type 1 diabetes.

Main Results:

  • Alginate-encapsulated human islets demonstrated successful function in mice.
  • The technology showed potential for successful islet function in a human with type 1 diabetes.
  • The encapsulation method provided protection against immune destruction.

Conclusions:

  • Alginate encapsulation is a viable strategy for protecting transplanted human islets.
  • This technology offers a promising approach for cell-based therapies in type 1 diabetes.
  • Further research is needed to overcome remaining obstacles for clinical application.