Smart-Temporary-Film-Based Local-Delivery System with Controllable Drug-Release Behavior

Area of Science:

• Biomaterials Science
• Drug Delivery Systems
• Nanotechnology

Background:

• Developing local drug delivery systems with controllable release remains a challenge.
• Integrating macro- and microscale carrier advantages is highly desired.
• Existing systems often lack tunable release profiles and optimal drug utilization.

Purpose of the Study:

• To create a smart temporary film from doxorubicin (DOX)-loaded shape-memory microgels.
• To evaluate the film's drug release behavior, mechanical properties, and in vitro performance.
• To compare the efficacy and safety of the temporary film with microgels for local drug delivery.

Main Methods:

• Preparation of DOX-loaded shape-memory microgels.
• Fabrication of a temporary film using a hot-compression programming method.
• Assessment of film disintegration, DOX release kinetics, cytotoxicity, and antitumor activity.

Main Results:

• The temporary film exhibited a smooth surface, easy handling, and macroscopic mechanical properties.
• Heating at 45 °C caused the film to disintegrate into microgels.
• The film demonstrated controllable DOX release, reduced cytotoxicity to normal cells, enhanced antitumor capability, and higher drug utilization efficiency compared to microgels.

Conclusions:

• The smart temporary film serves as an effective local drug delivery system.
• It combines the benefits of macro- and microscale carriers with on-demand drug release.
• The film shows significant potential for improved cancer therapy with better drug efficiency and safety.