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Engineering bioactive mineralized tumor cells for tumor immunotherapy
Zikun Shen1, Yan He1, Ren Mo2
1School of Medicine, South China University of Technology, Guangzhou, Guangdong, China.
Frontiers in Bioengineering and Biotechnology
|April 28, 2025
Summary
Engineered whole-cell tumor vaccines using mineralized tumor cells and CpG show significant tumor suppression. This novel immunotherapy approach enhances immune cell activity and extends survival in preclinical models.
Area of Science:
- Immunology
- Biotechnology
- Cancer Research
Background:
- Whole-cell tumor vaccines offer broad immune responses by presenting diverse tumor antigens.
- Current whole-cell vaccines can be enhanced for greater therapeutic efficacy.
Purpose of the Study:
- To develop and evaluate a multifunctional whole-cell tumor vaccine.
- To investigate the immune-activating properties of manganese-mineralized tumor cells combined with CpG.
Main Methods:
- Engineered a vaccine using manganese-mineralized B16F10 tumor cells with immobilized CpG.
- Assessed dendritic cell maturation via cGAS-STING and TLR9 pathway activation.
- Evaluated tumor suppression and survival in B16F10 tumor-bearing mice.
Main Results:
- The engineered vaccine significantly reduced tumor volume (to ~1/5th) and extended survival to day 30 in mice.
- Observed enhanced dendritic cell activation, increased NK and CD8+ T cell infiltration.
- Detected increased immune cytokine production within the tumor microenvironment.
Conclusions:
- Bioactive mineralized tumor cells represent a promising strategy for whole-cell tumor vaccine immunotherapy.
- This approach effectively leverages the immune system to combat cancer growth.
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