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Related Experiment Videos

Modulated insulin delivery from glucose-sensitive hydrogel dosage forms.

J J Kim1, K Park

  • 1Departments of Pharmaceutics and Biomedical Engineering, School of Pharmacy, Purdue University, West Lafayette, IN 47907, USA.

Journal of Controlled Release : Official Journal of the Controlled Release Society
|November 2, 2001
PubMed
Summary

Glucose-sensitive hydrogels offer a novel approach for controlled insulin delivery. These smart materials release insulin in response to glucose levels, improving therapeutic outcomes.

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Area of Science:

  • Biomaterials Science
  • Drug Delivery Systems
  • Polymer Chemistry

Background:

  • Developing effective insulin delivery systems is crucial for diabetes management.
  • Glucose-responsive materials offer potential for on-demand insulin release.
  • Existing systems often lack precise glucose sensitivity and controlled release kinetics.

Purpose of the Study:

  • To develop and evaluate glucose-sensitive hydrogels for modulated insulin delivery.
  • To investigate the influence of glucose concentration on insulin release kinetics.
  • To compare the performance of different hydrogel-based insulin delivery system designs.

Main Methods:

  • Preparation of glucose-sensitive hydrogels via copolymerization of allyl glucose with SPAK, VP, and AM.
  • Functionalization of concanavalin A (Con A) with polyethylene glycol (PEG) to enhance stability.

Related Experiment Videos

  • Fabrication and testing of three insulin delivery systems: diffusion-controlled reservoir, diffusion-controlled matrix, and erosion-controlled matrix.
  • In vitro assessment of insulin release profiles under varying glucose concentrations (1-4 mg/ml).

    • Main Results:

    • Insulin release rate from membrane and matrix systems directly correlated with glucose concentration.
    • Increased glucose levels (1-4 mg/ml) led to a higher insulin release rate.
    • Decreased glucose levels resulted in a reduced insulin release rate.
    • Diffusion-controlled systems demonstrated modulated insulin release, while the erosion-controlled system did not.

    Conclusions:

    • Glucose-sensitive hydrogels, particularly diffusion-controlled membrane and matrix systems, enable modulated insulin delivery in response to glucose fluctuations.
    • The developed hydrogel systems show promise for creating more sophisticated and responsive artificial pancreas technologies.
    • Further optimization of erosion-controlled systems may be needed to achieve glucose-responsive insulin release.