Multiple Strikes Achieve Remarkable Tumor-Inhibition Efficiency via Multi-mechanism Combination

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Oncology

Background:

• Breast cancer treatment faces challenges due to multiple cancer cell signaling pathways.
• Single-drug therapies are limited; combination therapies offer potential for enhanced efficacy.
• Inducing ferroptosis, autophagy, and apoptosis simultaneously presents a promising strategy.

Purpose of the Study:

• To develop a multifunctional dual-responsive nanosystem for synergistic ferroptosis-autophagy-apoptosis breast cancer therapy.
• To investigate the anti-tumor effects of the novel Rap@mFe3O4-DOX-HA nanoparticles.
• To evaluate the nanoparticle's ability to inhibit cancer cell migration and improve therapeutic outcomes.

Main Methods:

• Construction of Rap@mFe3O4-DOX-HA nanoparticles using mesoporous Fe3O4 as a carrier.
• Incorporation of rapamycin (Rap) for autophagy induction and doxorubicin (DOX) for apoptosis induction.
• Dual-responsive drug release at the tumor site triggered by H+/GSH, with Fe ions promoting ferroptosis.

Main Results:

• The nanosystem effectively inhibited 4T1 breast cancer cell migration in vitro and in vivo.
• The combination therapy achieved a synergistic effect by targeting multiple pathways.
• Significant improvement in anti-tumor efficacy was observed compared to single-mechanism treatments.

Conclusions:

• The developed nanosystem successfully integrates ferroptosis, autophagy, and apoptosis for enhanced breast cancer treatment.
• Dual-responsive drug release and multi-pathway targeting contribute to superior therapeutic effects.
• This multi-mechanism combination strategy offers a promising approach for overcoming treatment resistance and improving patient outcomes.