Multifunctional Graphene Oxide Quantum Dot Nanoformulation with Key Immunomodulation for Effective Anticancer Therapy...

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Cancer Therapy

Background:

• Melanoma treatment faces limitations with current therapies.
• Developing targeted, multifunctional platforms is crucial for overcoming these challenges.

Purpose of the Study:

• To create a targeted nanoplatform integrating photothermal therapy (PTT), chemodynamic therapy (CDT), and immune modulation for melanoma.
• To overcome limitations in current melanoma treatment strategies.

Main Methods:

• A multifunctional nanoplatform (rGOQD/MnO2/CpG/Q/FA) was synthesized using reduced graphene oxide quantum dots (rGOQD), MnO2, quercetin (Q), and CpG-ODN, targeted with folic acid (FA).
• In vitro and in vivo studies evaluated photothermal performance, reactive oxygen species (ROS) generation, macrophage polarization, cytokine release, and anti-tumor efficacy.

Main Results:

• The nanoplatform demonstrated potent PTT/CDT effects, enhanced cellular uptake via FA targeting, and induced apoptosis and immunogenic cell death (ICD).
• NIR irradiation with the nanoplatform significantly inhibited tumor growth, prolonged survival, and activated systemic immunity in a mouse model.
• Macrophage repolarization to the M1 phenotype and significant tumor growth inhibition were observed.

Conclusions:

• The targeted nanoplatform offers a promising strategy for integrating localized PTT/CDT with systemic immune modulation.
• This approach addresses key limitations in current melanoma therapies by combining multiple treatment modalities.