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Published on: May 22, 2020
pH-sensitive and bubble-generating mesoporous silica-based nanoparticles for enhanced tumor combination therapy
Zhiming Zhang1, Chenlu Huang1, Li Zhang1
1Tianjin Key Laboratory of Biomedical Materials, Key Laboratory of Biomaterials and Nanotechnology for Cancer Immunotherapy, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, China.
This study introduces novel nanoparticles for cancer therapy, combining chemotherapy with photothermal and photodynamic treatments. These multifunctional nanoparticles show enhanced tumor targeting and drug release, significantly inhibiting tumor growth.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Oncology
Background:
- Single-agent chemotherapy for malignant tumors faces limitations like multidrug resistance and severe side effects.
- Multifunctional nanoparticles offer a promising strategy for combination tumor therapy by co-loading chemotherapeutic agents and photosensitizers.
- Developing advanced drug delivery systems is crucial for overcoming current therapeutic challenges in cancer treatment.
Purpose of the Study:
- To construct a novel pH-sensitive, bubble-generating mesoporous silica-based drug delivery system for enhanced tumor combination therapy.
- To evaluate the efficacy of multifunctional nanoparticles co-loading doxorubicin (DOX), ammonium bicarbonate (NH4HCO3), and indocyanine green (ICG) with RGD targeting.
- To investigate the pH-dependent drug release, targeting efficacy, and combined photothermal/photodynamic therapeutic effects of the synthesized nanoparticles.
Main Methods:
- Synthesis of mesoporous silica nanoparticles (M(a)D@PI-PEG-RGD) loaded with doxorubicin (DOX) and ammonium bicarbonate (NH4HCO3).
- Surface modification with polydopamine (PDA) and indocyanine green (ICG) for photothermal and photodynamic properties, along with RGD peptide for targeting.
- Characterization using dynamic light scattering (DLS) for particle size and polydispersity index (PDI), cellular uptake studies, in vivo animal studies, and drug release analysis.
Main Results:
- The synthesized nanoparticles exhibited small particle size and narrow polydispersity, indicating good stability.
- RGD modification facilitated high cellular uptake and targeting efficacy, confirmed by in vitro and in vivo studies.
- The nanoparticles demonstrated pH-dependent doxorubicin release, accelerated by ammonium bicarbonate, and significant tumor growth inhibition through combined photothermal and photodynamic therapy.
Conclusions:
- The developed multifunctional, pH-sensitive, bubble-generating mesoporous silica nanoparticles represent a promising platform for synergistic cancer combination therapy.
- The system effectively co-delivers chemotherapeutic and photosensitizing agents, enhancing therapeutic outcomes while potentially mitigating side effects.
- This innovative nanodrug delivery system shows significant potential for improving the clinical application of tumor treatment strategies.
