"Smart" Matrix Microneedle Patch Made of Self-Crosslinkable and Multifunctional Polymers for Delivering Insulin...

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Drug Delivery Systems

Background:

• Diabetes management requires precise insulin delivery.
• Current methods face challenges in safety and patient convenience.
• Glucose-responsive systems aim to mimic physiological insulin secretion.

Purpose of the Study:

• To develop a novel self-crosslinkable and glucose-responsive microneedle patch for transdermal insulin delivery.
• To create a safe and effective system for hyperglycemia management in diabetes.

Main Methods:

• Fabrication of microneedle patches using hyaluronic acid functionalized with dopamine and 4-amino-3-fluorophenylboronic acid.
• Utilizing catechol-boronate complexation for glucose-responsive crosslinking.
• In vitro and in vivo studies to evaluate insulin release kinetics and efficacy.

Main Results:

• The microneedle patch demonstrated rapid crosslinking without chemical agents.
• Reversible crosslinking allowed for glucose-dependent insulin release, with faster release at higher glucose concentrations.
• Preservation of insulin's native structure and bioactivity was confirmed.
• In vivo studies showed superior glucose-responsive properties.

Conclusions:

• The developed microneedle patch offers a promising, simple, and potentially clinically translatable approach for glucose-responsive insulin delivery.
• This technology could significantly improve diabetes care and patient quality of life.