Targeting endothelial permeability in the EPR effect.

Area of Science:

• Oncology
• Nanomedicine
• Vascular Biology

Background:

• The enhanced permeability and retention (EPR) effect is crucial for delivering anti-cancer nanomedicine, particularly in preclinical models.
• Increased vascular permeability in tumor vessels is a key characteristic driving the EPR effect.
• Endothelial regulation of vascular permeability is central to understanding and exploiting the EPR effect.

Purpose of the Study:

• To review the endothelial regulation of vascular permeability in the context of nanomedicine delivery.
• To discuss challenges and opportunities for targeting vascular permeability in clinical translation.
• To summarize mechanisms, mediators, and nanoparticle design for improved therapeutic outcomes.

Main Methods:

• Review of current literature on endothelial permeability, tumor microenvironment, and nanomedicine delivery.
• Analysis of signaling pathways and structural components regulating vascular permeability.
• Critical evaluation of targeted approaches, immune cell interactions, and nanoparticle design.

Main Results:

• Endothelial cells and their signaling pathways significantly influence vascular permeability.
• Tumor-infiltrating immune cells and their interactions with tumor vessels impact nanomedicine delivery.
• Current targeted approaches face challenges in clinical translation, necessitating improved nanoparticle design.

Conclusions:

• Targeting endothelial regulation of vascular permeability holds promise for enhancing nanomedicine delivery.
• Overcoming challenges requires a comprehensive understanding of the tumor microenvironment and immune interactions.
• Optimized nanoparticle design is essential for successful clinical translation of EPR-based therapies.