Extracellularly activated nanocarriers: a new paradigm of tumor targeted drug delivery

Area of Science:

• Nanomedicine
• Drug Delivery Systems
• Oncology

Background:

• Developing nanocarriers for selective anticancer drug delivery to tumors is a key nanomedicine goal.
• Current nanocarriers primarily rely on the enhanced permeability and retention effect for tumor accumulation.
• Targeting molecules enhance nanocarrier recognition and internalization, but achieving both stealth and targeting is challenging.

Purpose of the Study:

• To review novel nanocarrier targeting strategies that utilize tumor-specific environmental stimuli.
• To highlight recent advancements in activating nanocarriers in a tumor-specific manner.
• To discuss the achievements and challenges of traditional and new tumor-targeted nanocarrier strategies.

Main Methods:

• Review of existing literature on nanomedicine and tumor-targeted drug delivery.
• Analysis of recent targeting strategies employing environmental stimuli for nanocarrier activation.
• Discussion of traditional methods, focusing on their successes and limitations.

Main Results:

• Recent strategies exploit the unique tumor extracellular environment to activate nanocarriers.
• These stimuli-responsive nanocarriers can release drugs or interact with cells in a tumor-specific way.
• Simultaneous achievement of stealth and targeting features in nanocarriers remains a significant challenge.

Conclusions:

• Environmental stimuli-responsive nanocarriers offer promising solutions for targeted cancer therapy.
• Further research into these advanced strategies is crucial for overcoming current limitations.
• Successful nanomedicine requires balancing stealth properties with tumor-specific activation for enhanced efficacy.