Tri-stimuli-responsive biodegradable theranostics for mild hyperthermia enhanced chemotherapy

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Cancer Therapy

Background:

• Hyperthermia and chemotherapy exhibit synergistic effects, enhancing cancer treatment efficacy.
• Developing advanced drug delivery systems is crucial for improving therapeutic outcomes.
• Nanotheranostics offer combined diagnostic and therapeutic capabilities for personalized medicine.

Purpose of the Study:

• To explore and validate the synergistic mechanism of mild hyperthermia-enhanced chemotherapy.
• To develop and characterize novel biodegradable nanotheranostics for combined therapy.
• To investigate the efficacy of the nanotheranostics in vitro and in vivo.

Main Methods:

• Synthesis of copper sulfide doped periodic mesoporous organosilica nanoparticles (CuS@PMOs).
• Loading of doxorubicin (DOX) onto CuS@PMOs and characterization of drug release kinetics.
• In vitro and in vivo evaluation of mild hyperthermia-induced enhancement of chemotherapy using laser irradiation.
• Monitoring of drug release and therapeutic progress via fluorescence recovery.

Main Results:

• CuS@PMOs demonstrated a high doxorubicin loading capacity (470 mg/g).
• Doxorubicin release was precisely controlled by intracellular glutathione, acidic pH, and laser irradiation.
• Mild hyperthermia significantly enhanced nanotheranostic cellular uptake in vitro and in vivo.
• Complete tumor growth suppression without recurrence was achieved, demonstrating enhanced chemotherapeutic efficacy.

Conclusions:

• Mild hyperthermia synergistically enhances chemotherapy efficacy through improved nanotheranostic uptake.
• CuS@PMOs serve as effective nanotheranostics for light-triggered mild hyperthermia and controlled drug delivery.
• This approach shows significant potential for advanced cancer treatment with minimal recurrence.