Improving long-term subcutaneous drug delivery by regulating material-bioenvironment interaction.

Area of Science:

• Biomaterials Science
• Drug Delivery Systems
• Tissue Engineering

Background:

• Subcutaneous long-acting release (LAR) formulations are crucial for improving patient compliance and reducing healthcare costs in clinical settings.
• A significant challenge for current LAR systems is their interaction with surrounding subcutaneous tissues, which can limit therapeutic efficacy.
• Understanding the host response to implanted or injected materials is essential for developing effective drug delivery systems.

Purpose of the Study:

• To review the biological responses to subcutaneous implants and injections.
• To highlight smart material design strategies for improving long-term subcutaneous drug delivery.
• To propose future directions for ultra-long-acting (months to years) subcutaneous drug delivery systems.

Main Methods:

• Literature review of biological responses to biomaterials.
• Analysis of smart material design principles for drug delivery.
• Exploration of strategies for achieving extended drug release durations.

Main Results:

• In vivo biological responses to subcutaneous materials are complex and influence drug release kinetics.
• Smart material design offers promising avenues to mitigate adverse tissue reactions and enhance drug delivery.
• Current strategies show potential for developing sustained and controlled drug release over extended periods.

Conclusions:

• Well-designed subcutaneous LAR formulations can overcome tissue integration challenges.
• Advanced material design is key to achieving ultra-long drug delivery durations.
• Optimized subcutaneous drug delivery systems hold significant potential to improve patient quality of life.