Controlled release of biologically active compounds from bioerodible polymers

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Drug Delivery Systems

Background:

• Controlled release systems are crucial for therapeutic efficacy.
• Polymer matrices offer versatile platforms for incorporating and releasing active agents.
• Understanding polymer degradation mechanisms is key to designing effective drug delivery.

Purpose of the Study:

• To review the mechanisms of controlled release of biologically active agents from eroding polymer matrices.
• To discuss polymer erosion processes including cross-linked scission, hydrolysis, ionization, protonation, and backbone cleavage.
• To correlate drug release studies with specific polymer degradation pathways.

Main Methods:

• Review of scientific literature on polymer erosion and drug release.
• Categorization of drug release mechanisms based on polymer degradation pathways.
• Analysis of studies involving active agents incorporated within polymer matrices.

Main Results:

• Identified key polymer erosion mechanisms governing active agent release.
• Detailed the influence of cross-linked scission, hydrolysis, ionization, and backbone cleavage on release kinetics.
• Highlighted the importance of polymer matrix degradation in controlling drug diffusion and release.

Conclusions:

• Polymer erosion is a primary mechanism for controlled release of incorporated active agents.
• Specific degradation pathways dictate the rate and profile of drug release.
• Further research into tailoring polymer degradation can optimize drug delivery systems.