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Related Experiment Video

Updated: Sep 22, 2025

Bioluminescent Monitoring of Graft Survival in an Adoptive Transfer Model of Autoimmune Diabetes in Mice
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PEGDA microencapsulated allogeneic islets reverse canine diabetes without immunosuppression.

Stephen Harrington1, Francis Karanu1, Karthik Ramachandran1

  • 1Likarda, LLC, Kansas City, Missouri, United States of America.

Plos One
|May 25, 2022
PubMed
Summary
This summary is machine-generated.

This study shows polyethylene glycol diacrylate (PEGDA) microencapsulated islets can reverse diabetes in dogs without immunosuppression, leading to insulin independence. This offers a promising new approach for islet transplantation.

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Area of Science:

  • Biomedical Engineering
  • Regenerative Medicine
  • Transplantation Immunology

Background:

  • Achieving islet transplant success without systemic immunosuppression remains a significant challenge.
  • This study explores polyethylene glycol diacrylate (PEGDA) microencapsulation as a potential solution for islet protection.

Purpose of the Study:

  • To evaluate the biocompatibility and safety of PEGDA microencapsulated canine islets in healthy dogs.
  • To determine the efficacy of these microencapsulated islets in reversing diabetes in diabetic dogs.

Main Methods:

  • Canine islets were characterized and encapsulated in PEGDA microspheres.
  • Islets were transplanted intraperitoneally into healthy and diabetic dogs.
  • Biocompatibility, safety, and glycemic control were monitored.

Main Results:

  • No adverse events or hypoglycemia were observed in healthy dogs receiving up to 1.7 M cells/kg.
  • Diabetic dogs showed a 50-100% reduction in insulin requirements, with some achieving insulin independence.
  • Microencapsulated islets attached to the omentum, and abnormal blood chemistry values normalized post-transplant.

Conclusions:

  • PEGDA microencapsulated canine islets effectively reversed diabetes signs in dogs without requiring systemic immunosuppression.
  • This approach shows potential for achieving insulin independence or significantly reduced insulin needs in islet transplant recipients.