Recent Advancements in Using Polymers for Intestinal Mucoadhesion and Mucopenetration

Area of Science:

• Biomaterials Science
• Drug Delivery Systems
• Nanotechnology

Background:

• Oral drug administration is preferred but hindered by the intestinal mucus layer.
• Effective drug delivery requires overcoming this barrier for therapeutic success.

Purpose of the Study:

• To summarize recent (2-3 years) developments in polymer-based formulations for oral drug delivery.
• To highlight strategies for enhancing drug penetration and adhesion within the intestinal mucus.

Main Methods:

• Review of polymer-based nanoparticles with mucopenetrating coatings (noninteracting polymers, virus-like particles, charge-shifting particles).
• Discussion of polymer modifications for improved mucoadhesion.
• Analysis of double-encapsulation systems combining mucopenetration and mucoadhesion.

Main Results:

• Progress in designing nanoparticles that can penetrate the intestinal mucus layer.
• Development of polymers and systems to enhance drug retention at the intestinal surface.
• Emergence of dual-function systems for combined mucus penetration and adhesion.

Conclusions:

• Polymer-based formulations show significant promise for overcoming intestinal mucus barriers.
• Further research is needed to address remaining challenges in oral drug delivery systems.