Visualized intravesical floating hydrogel encapsulating vaporized perfluoropentane for controlled drug release

Area of Science:

• Biomaterials Science
• Drug Delivery Systems
• Urology

Background:

• Intravesical drug delivery is crucial for bladder disorders.
• Mucoadhesive hydrogels offer controlled release but can cause urinary obstruction and irritation.
• Existing methods for intravesical drug delivery have limitations.

Purpose of the Study:

• To develop a novel floating hydrogel delivery system for intravesical drug administration.
• To utilize perfluoropentane (PFP) vaporization for controlled hydrogel buoyancy.
• To address the limitations of conventional intravesical instillation methods.

Main Methods:

• Formulation of a hydrogel system incorporating perfluoropentane (PFP) as a floating agent.
• Investigation of PFP vaporization upon intravesical instillation due to body temperature.
• Systematic experimental analysis of hydrogel morphology and floating behavior.
• Evaluation of PFP as a potential contrast agent for monitoring.

Main Results:

• The developed hydrogel system generates microbubbles via PFP vaporization within the bladder.
• The microbubbles enable the hydrogel to float, mitigating urinary obstruction and irritation.
• The floating mechanism proved to be milder and safer compared to previous methods.
• PFP demonstrated utility as a contrast agent for intravesical gel monitoring.

Conclusions:

• A novel floating hydrogel drug delivery system using PFP vaporization has been successfully developed.
• This system effectively overcomes the drawbacks of conventional intravesical instillation.
• The technology shows significant promise for clinical application in treating bladder disorders.