Ligand-targeted liposomes

Area of Science:

• Biotechnology
• Nanotechnology
• Pharmacology

Background:

• Liposomes are increasingly used for systemic drug delivery, with recent approvals highlighting their improved therapeutic indices.
• Current liposome formulations enhance drug delivery by retaining medication in circulation and enabling selective tissue extravasation.
• Further advancements require surface ligands for precise targeting and enhanced delivery of macromolecules.

Purpose of the Study:

• To review technologies for directing liposomes to specific in vivo targets using surface-bound ligands.
• To discuss biological barriers, target selection criteria, and ligand strategies for site-directed liposome therapy.
• To explore novel targets and ligand constructs for advanced liposome-based treatments.

Main Methods:

• Review of existing literature on liposome technology and targeted drug delivery.
• Analysis of biological barriers and criteria for selecting targeting determinants.
• Discussion of various targeting ligands and delivery system designs for site-directed therapy.

Main Results:

• Liposomes improve drug delivery by physical means, reducing uptake by normal tissues and increasing delivery to target sites.
• Surface-bound ligands are crucial for enhancing the selective delivery of liposomes, especially for macromolecules.
• Novel targets and ligand constructs show promise for future site-directed liposome therapies.

Conclusions:

• Site-directed liposome therapy using surface ligands offers significant potential for improving drug delivery, particularly for macromolecules.
• Overcoming biological barriers and optimizing ligand-target interactions are key to successful in vivo targeting.
• This review provides a framework for developing next-generation liposome delivery systems for enhanced therapeutic outcomes.