Related Experiment Video
Updated: Feb 8, 2026
09:57
Evaluation of the In vivo Antitumor Activity of Polyanhydride IL-1α Nanoparticles
Published on: June 28, 2021
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Microfluidics engineered autologous nanovaccine for activating and visualizing antitumor activity
Xiaoting Jiang1, Jiacheng Song1, Yunfei Mu2
1Department of Radiology, the First Affiliated Hospital with Nanjing Medical University, Nanjing, 210029, China.
Journal of Nanobiotechnology
|February 7, 2026
Summary
This study introduces a novel nanovaccine using tumor-derived extracellular vesicles (TEVs) coated with manganese dioxide. This self-reporting cancer vaccine enhances immune response and allows non-invasive tracking of vaccine efficacy via MRI.
Area of Science:
- Biomedical Engineering
- Cancer Immunology
- Nanotechnology
Background:
- Tumor-derived extracellular vesicles (TEVs) show promise as cancer vaccines due to inherent tumor antigens.
- Challenges include immune evasion and lack of non-invasive methods to monitor vaccine efficacy in vivo.
Purpose of the Study:
- To engineer a self-reporting nanovaccine based on TEVs for enhanced cancer immunotherapy.
- To develop a non-invasive method for monitoring vaccine-induced immune responses in vivo.
Main Methods:
- Coating TEVs with pH-sensitive manganese dioxide (mTEV) using microfluidics.
- mTEVs were designed to block inhibitory ligands, degrade in lysosomes, release Mn2+, and enhance MRI contrast.
- Evaluation of mTEV efficacy in ovarian cancer models, assessing DC maturation, T cell responses, and tumor suppression.
Main Results:
- mTEVs promoted dendritic cell (DC) uptake and activation by blocking CD47 and releasing Mn2+.
- Released Mn2+ activated the cGAS-STING pathway and served as a T1-weighted MRI contrast agent for DC tracking.
- mTEVs demonstrated significant tumor suppression and reduced peritoneal dissemination in ovarian cancer models.
- Early MRI signals in lymph nodes correlated with treatment outcomes, serving as a predictive biomarker.
Conclusions:
- The developed mTEV nanovaccine platform effectively overcomes immune evasion and enables in vivo monitoring of vaccine efficacy.
- This dual-functional nanovaccine integrates immune activation with non-invasive tracking, offering a precision strategy for cancer immunotherapy.
- MRI-based monitoring provides a predictive biomarker for treatment success in cancer vaccination.
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