Coupled gel spreading and diffusive transport models describing microbicidal drug delivery

Area of Science:

• Biomedical Engineering
• Pharmaceutics
• Infectious Disease Research

Background:

• Vaginal gels are explored for delivering microbicides to prevent HIV transmission.
• User adherence issues have hindered the success of microbicide gel trials.
• Understanding gel properties and drug delivery is crucial for effective microbicide design.

Purpose of the Study:

• To develop a model predicting tenofovir transport into vaginal mucosa.
• To investigate the influence of gel rheology, volume, and drug concentration on delivery.
• To enhance microbicide gel design by integrating biophysical and pharmacological insights.

Main Methods:

• Modeling tenofovir transport within the vaginal environment.
• Incorporating vaginal canal fluid dynamics and tissue elasticity into drug delivery models.
• Analyzing gel properties like rheology and volume in relation to drug concentration.

Main Results:

• Established a model for tenofovir transport influenced by gel characteristics.
• Identified key factors controlling microbicide drug delivery into the vaginal mucosa.
• Integrated environmental factors like vaginal fluid and elasticity into delivery modeling.

Conclusions:

• Improved biophysical and pharmacological understanding of gel functionality is achieved.
• A computational tool is provided for future vaginal microbicide gel design.
• Addressing gel properties and delivery mechanisms can improve anti-HIV efficacy and adherence.