Construction of Intelligent Responsive Drug Delivery System and Multi-Mode Imaging Based on Gold Nanodots

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Oncology

Background:

• Paclitaxel (PTX) is effective against lung, ovarian, and breast cancers but faces limitations like poor water solubility, drug resistance, and side effects.
• Developing advanced drug delivery systems is crucial to overcome PTX limitations and improve therapeutic outcomes.

Purpose of the Study:

• To construct a core-shell nano-system integrating diagnosis and treatment for intelligent responsive drug delivery of paclitaxel.
• To address PTX's poor water solubility and drug resistance while enabling targeted release in the tumor microenvironment.

Main Methods:

• Fabrication of a gold nanodots-paclitaxel-polylysine (AuNDs-PTX-PLL) core-shell nano-system.
• Utilizing multi-modal imaging (fluorescence, photoacoustic, computed tomography) for tumor tracking and diagnosis.
• Leveraging the weakly acidic tumor environment and photothermal effects for intelligent drug release.

Main Results:

• The AuNDs-PTX-PLL nano-system successfully addressed PTX's solubility and resistance issues.
• Intelligent drug release was achieved specifically in the tumor's weakly acidic environment, minimizing damage to healthy tissues.
• Multi-modal imaging capabilities provided accurate tumor visualization and real-time tracking.

Conclusions:

• The developed nano-system offers a promising integrated approach for tumor diagnosis and treatment.
• Intelligent drug delivery and multi-modal imaging capabilities enhance therapeutic efficacy and patient safety.
• This technology holds significant potential for clinical application in oncology.