Toward a hybrid artificial pancreas.

Area of Science:

• Biomedical Engineering
• Endocrinology
• Regenerative Medicine

Background:

• Current insulinopenic diabetes management relies on external insulin delivery or transplantation.
• Hybrid devices integrating glucose-sensing and insulin-delivery functions are under investigation.
• Maintaining function of implanted endocrine tissue is crucial for therapeutic efficacy.

Purpose of the Study:

• To evaluate the potential of a hybrid artificial pancreas combining living endocrine tissue with fabricated components.
• To assess the functional longevity of isolated islets or pancreatic tissue within a semipermeable membrane device.
• To determine the feasibility of this hybrid system for glucose regulation in diabetic models.

Main Methods:

• Surgical implantation of hybrid devices containing endocrine tissue (islets, insulinoma, fetal pancreas) into diabetic rats.
• Utilizing semipermeable membranes (hollow fibers or boxes) to encapsulate the living tissue.
• Monitoring the ability of the device to sustain euglycemic conditions in chemically induced diabetic models.

Main Results:

• Pilot studies demonstrated that encapsulated endocrine tissue retained function for days to weeks.
• The hybrid devices showed the capacity to regulate blood glucose levels in diabetic rats.
• Successful maintenance of euglycemia suggests functional integration of biological and artificial components.

Conclusions:

• Hybrid artificial pancreas devices show promise for autonomous glucose control in insulin-dependent diabetes.
• Further research, including trials in larger animal models like dogs, is warranted.
• This technology could offer a significant advancement over current diabetes management strategies for select patients.