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Related Experiment Videos

Concanavalin A microspheres for a self-regulating insulin delivery system.

C M Pai1, Y H Bae, E J Mack

  • 1Department of Pharmaceutics, University of Utah, Salt Lake City 84108.

Journal of Pharmaceutical Sciences
|June 1, 1992
PubMed
Summary

A novel self-regulating insulin delivery system uses concanavalin A (Con A) microspheres to bind glucose and insulin. This system demonstrates pulsatile insulin release in response to glucose levels, offering a new approach for diabetes management.

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Area of Science:

  • Biomaterials Science
  • Drug Delivery Systems
  • Biomedical Engineering

Background:

  • Developing self-regulating insulin delivery systems is crucial for improving diabetes management.
  • Concanavalin A (Con A) has shown potential for glucose-responsive binding.
  • Previous systems faced challenges in controlled insulin release.

Purpose of the Study:

  • To investigate a self-regulating insulin delivery system utilizing competitive binding.
  • To characterize concanavalin A (Con A) microspheres (MSs) for glucose and insulin binding.
  • To evaluate the pulsatile insulin release profile of the developed device.

Main Methods:

  • Preparation of Con A microspheres (MSs) via water-in-oil emulsion.
  • Characterization of Con A MSs binding properties with glucose and p-succinylamidophenyl-alpha-D-glycopyranoside-insulin (SAPG-insulin).

Related Experiment Videos

  • Encapsulation of SAPG-insulin loaded Con A MSs within a modified poly(vinylidene difluoride) membrane pouch.

    • Main Results:

    • Con A MSs exhibited binding constants similar to unmodified Con A for glucose and SAPG-insulin.
    • Crosslinked Con A MSs retained approximately 28% of the binding capacity of intact Con A.
    • The device demonstrated a pulsatile insulin release pattern with a short lag time in response to varying glucose concentrations (50-500 mg/dL).

    Conclusions:

    • The developed self-regulating insulin delivery system shows promise for glucose-responsive insulin release.
    • The system's release pattern can be modulated by adjusting design parameters like surface area and membrane pore size.
    • This technology offers a potential advancement in closed-loop insulin delivery for diabetes patients.