Polymeric Nano Drug Delivery Systems for Overcoming Tumor Microenvironment-Mediated Drug Resistance

Area of Science:

• Biomedical Engineering
• Materials Science
• Oncology

Background:

• The tumor microenvironment (TME) presents significant challenges to cancer drug delivery and efficacy.
• Key TME factors include hypoxia, acidosis, elevated interstitial fluid pressure, cancer-associated fibroblasts, and immunosuppressive cells.
• These factors contribute to limited drug penetration and promote drug resistance through various mechanisms.

Purpose of the Study:

• To review how TME components impede drug delivery and foster resistance in solid tumors.
• To explore the design principles of polymeric nanomedicines for overcoming TME-mediated drug resistance.
• To examine challenges and future directions for the clinical translation of polymer-based nanotherapeutics.

Main Methods:

• Literature review of the TME's role in drug resistance.
• Analysis of polymeric nanomedicine strategies targeting TME characteristics.
• Discussion of clinical translation hurdles and future research avenues.

Main Results:

• Physicochemical and cellular aspects of the TME create substantial barriers to drug delivery and efficacy.
• Polymeric nanomedicines can be engineered to respond to TME stimuli for controlled drug release.
• These systems show potential for enhanced therapeutic outcomes and reduced systemic toxicity.

Conclusions:

• Polymeric nanomedicines offer a viable strategy to combat TME-mediated drug resistance.
• Addressing challenges like tumor heterogeneity and manufacturing scalability is crucial for clinical success.
• Future efforts should focus on rational material design, improved preclinical models, and clinically relevant strategies.