Overcoming tumor microenvironment obstacles: Current approaches for boosting nanodrug delivery

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Oncology

Background:

• Nanoparticles are utilized for targeted anticancer drug delivery, aiming to improve efficacy and reduce side effects.
• Current nanoparticle-based therapies show suboptimal therapeutic effects due to tumor microenvironment (TME) abnormalities.
• Factors like abnormal tumor vasculature, high interstitial fluid pressure, and dense extracellular matrix impede nanoparticle penetration.

Purpose of the Study:

• To comprehensively review factors hindering nanoparticle penetration into tumors.
• To describe methods for enhancing nanoparticle distribution by remodeling the TME and optimizing nanoparticle properties.
• To critically analyze future directions in nanodrug delivery for oncology.

Main Methods:

• Review of existing literature on nanoparticle delivery challenges and solutions.
• Analysis of how nanoparticle physicochemical properties (size, charge, shape) influence tumor transport.
• Examination of TME remodeling strategies to improve nanoparticle accessibility.

Main Results:

• Tumor microenvironment abnormalities significantly limit nanoparticle penetration and distribution.
• Optimization of nanoparticle physicochemical properties is crucial for effective tumor targeting.
• Strategies involving TME modulation and nanoparticle design can enhance tumor accumulation.

Conclusions:

• Overcoming TME barriers is essential for effective nanomedicine in cancer treatment.
• A dual approach of TME remodeling and nanoparticle optimization holds promise for improved therapeutic outcomes.
• Future research should focus on addressing challenges in nanomedicine design for enhanced tumor accumulation.