Engineering stimuli-responsive extracellular vesicles for enhanced anticancer therapeutics.

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Cancer Therapeutics

Background:

• Extracellular vesicles (EVs) are promising nanocarriers for cancer therapy due to biocompatibility and low immunogenicity.
• Clinical application is hindered by off-target delivery, premature drug release, rapid clearance, and the challenging tumor microenvironment (e.g., stiff ECM, high IFP).

Purpose of the Study:

• To review how stimuli-responsive EVs can overcome tumor biomechanical barriers for enhanced cancer therapy.
• To discuss the development and clinical translation of these advanced nanoplatforms.

Main Methods:

• Engineering of EVs to be responsive to internal stimuli (pH, enzymes, redox) or external stimuli (magnetic fields, light, ultrasound, temperature).
• Evaluation of engineered EVs for controlled drug release, enhanced tumor targeting, and improved deep tissue penetration.

Main Results:

• Stimuli-responsive EVs demonstrate superior control over drug release kinetics.
• Engineered EVs show enhanced accumulation and efficacy within solid tumors.
• These nanoplatforms exhibit improved deep tissue penetration compared to conventional methods.

Conclusions:

• Stimuli-responsive EVs offer a viable strategy to overcome the biomechanical challenges of solid tumors.
• Further development and clinical translation are crucial for realizing the full therapeutic potential of engineered EVs in cancer treatment.