Colloidal nanosystems with mucoadhesive properties designed for ocular topical delivery

Area of Science:

• Ophthalmology
• Pharmaceutics
• Nanotechnology

Background:

• Topical ocular drug delivery to the posterior eye segment is gaining interest due to its non-invasive nature and reduced side effects.
• Significant challenges exist, including ocular barriers, tear clearance, and blood flow, which limit drug bioavailability.
• Improving corneal permeability and precorneal retention time are key strategies to enhance intraocular drug bioavailability.

Purpose of the Study:

• To review current mucoadhesive colloidal nanosystems for topical ocular administration.
• To focus on the advantages and limitations of these nanosystems for posterior eye segment delivery.

Main Methods:

• Review of scientific literature on mucoadhesive polymers and colloidal nanosystems for ocular delivery.
• Analysis of strategies to overcome ocular barriers and enhance drug bioavailability.
• Focus on mucoadhesive properties and nanosystem interactions with ocular mucosa.

Main Results:

• Mucoadhesive polymers (e.g., xyloglucan, chitosan, carbomers) can increase drug residence time in the precorneal area.
• Colloidal nanosystems can interact with ocular mucosa, enhancing corneal and conjunctival permeability.
• Nanosystems offer stability and improved bioavailability for various drugs, including macromolecules.

Conclusions:

• Mucoadhesive colloidal nanosystems represent a novel pharmaceutical approach for efficient ocular disease treatment.
• These systems hold potential for overcoming the limitations of conventional topical ocular drug delivery.
• Further research into their advantages and limitations is crucial for clinical application.