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Biofunctionalized Prussian Blue Nanoparticles for Multimodal Molecular Imaging Applications
Published on: April 28, 2015
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Microbial synthesis of Prussian blue for potentiating checkpoint blockade immunotherapy
Dongdong Wang1,2, Jiawei Liu1,3, Changlai Wang2
1School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, 637371, Singapore.
Nature Communications
|May 23, 2023
Summary
This study introduces MiBaMc, a novel nanoplatform targeting tumor cell mitochondria to enhance cancer immunotherapy. Combining Prussian blue nanoparticles with bacterial membranes, it amplifies photodynamic therapy and boosts T cell responses for improved tumor inhibition.
Area of Science:
- Oncology
- Immunology
- Nanotechnology
- Biomaterials
Background:
- Cancer immunotherapy is a rapidly advancing field in oncology.
- Nanotechnology offers potential to enhance immunotherapy efficacy and safety.
- Microbial membrane-based nanoplatforms are emerging for targeted drug delivery and therapeutic applications.
Purpose of the Study:
- To develop a mitochondria-targeting nanoplatform (MiBaMc) for amplified antitumor immune response.
- To utilize Prussian blue nanoparticles produced via biological precipitation for enhanced photodynamic therapy.
- To investigate the synergistic effects of MiBaMc-based phototherapy and checkpoint blockade in preclinical cancer models.
Main Methods:
- Synthesis of Prussian blue nanoparticles using Shewanella oneidensis MR-1.
- Fabrication of MiBaMc by decorating bacterial membrane fragments with Prussian blue, chlorin e6, and triphenylphosphine.
- Evaluation of MiBaMc's mitochondrial targeting and photodynamic efficacy in tumor cells.
- Assessment of immune response, including dendritic cell maturation and T cell activation, in tumor-bearing mouse models.
- Combination therapy studies with anti-PDL1 blocking antibody.
Main Results:
- MiBaMc specifically targets tumor cell mitochondria, inducing significant photo-damage and immunogenic cell death.
- Light irradiation of MiBaMc leads to the release of tumor antigens, promoting dendritic cell maturation.
- MiBaMc-mediated phototherapy synergizes with anti-PDL1 antibody to enhance tumor inhibition in vivo.
- The study demonstrates a scalable biological precipitation method for targeted nanoparticle synthesis.
Conclusions:
- MiBaMc is an effective mitochondria-targeting nanoplatform for cancer immunotherapy.
- The combination of phototherapy and immunotherapy using MiBaMc shows significant potential for enhanced antitumor effects.
- Biological precipitation offers a promising strategy for developing advanced microbial membrane-based nanotherapeutics.
