Recent Progress in Bio-Responsive Drug Delivery Systems for Tumor Therapy

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Oncology

Background:

• Controlled drug release is crucial for effective cancer therapy.
• Tumor microenvironments possess unique characteristics like acidosis, hypoxia, and specific biomarkers (ROS, GSH, ATP) that can be exploited.
• Current drug delivery systems (DDSs) face challenges in achieving spatial and temporal control.

Purpose of the Study:

• To review the pathophysiological characteristics of the tumor microenvironment.
• To highlight recent advances in stimulus-responsive DDSs for cancer therapy.
• To discuss future directions and challenges in bio-responsive DDS development.

Main Methods:

• Literature review of stimulus-responsive DDSs.
• Analysis of tumor microenvironment's abnormal pathophysiological features.
• Synthesis of recent research on DDSs targeting tumor-specific stimuli.

Main Results:

• Tumor microenvironment stimuli (acidosis, enzymes, hypoxia, ROS, GSH, ATP) enable precise drug release.
• Responsive DDSs can achieve targeted delivery, reducing dosage and systemic toxicity.
• Significant progress has been made in designing DDSs that respond to these specific tumor characteristics.

Conclusions:

• Stimulus-responsive DDSs offer a promising strategy for enhanced cancer therapy.
• Exploiting tumor microenvironment features allows for more efficient and less toxic drug delivery.
• Further research is needed to overcome challenges and optimize bio-responsive DDSs for clinical application.