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Evaluation of an intracellular magneto-mechanical approach for regulating dendritic cell activation
Rui Gao1, Wanxin Huang2, Yehe Kang1
1Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Fourth People's Hospital, School of Medicine, Tongji University, Shanghai, P.R. China; Frontiers Science Center for Intelligent Autonomous Systems, Tongji University, Shanghai, P.R. China; Collaborative Innovation Center for Brain Science, Tongji University, Shanghai, P.R. China.
Insights
Magneto-mechanical modulation enhances dendritic cell (DC) cross-presentation of tumor antigens. This technology uses magnetic nanorobots to control lysosomal function, boosting T cell-mediated antitumor immunity.
Area of Science:
- Immunology
- Biotechnology
- Nanotechnology
Background:
- Dendritic cells (DCs) are key for initiating antitumor immunity by cross-presenting antigens.
- Lysosomal antigen escape is a bottleneck for DC cross-presentation.
- Existing tools lack organelle-specific control over this process.
Purpose of the Study:
- To present a protocol for evaluating magneto-mechanical regulation of DCs.
- To assess the impact of this technology on DC function and cross-presentation.
- To provide a method for enhancing T cell-mediated antitumor responses.
Main Methods:
- Magneto-mechanical modulation using magnetic nanorobots within lysosomes.
- Assessment of DC cytotoxicity and nanorobot-lysosome colocalization via fluorescence imaging.
- Analysis of lysosomal membrane permeability (LMP), cytoskeleton, and mitochondrial function.
- Quantification of DC mechano-activation and cross-presentation efficiency using flow cytometry.
Main Results:
- Demonstrated a protocol for evaluating magneto-mechanical regulation of DCs.
- Visualized nanorobot behavior within lysosomes and their impact on organelle function.
- Quantified improvements in DC cross-presentation efficiency.
- Assessed DC cytotoxicity and functional responses to magneto-mechanical stimuli.
Conclusions:
- Magneto-mechanical modulation offers a tunable approach to enhance DC cross-presentation.
- This technology holds promise for improving T cell-mediated antitumor immunity.
- The presented protocol enables comprehensive evaluation of this novel immunomodulation strategy.
Abstract:
Dendritic cells (DCs) are crucial in processing and cross-presenting tumor-associated antigens via MHC I molecules to prime CD8+ T lymphocytes (CTLs) for antitumor immunity. However, the moderate regulation of antigen endocytic escape from lysosomes into the cytoplasm hinders this cross-presentation process due to the lack of finely tunable tools at the organelle-specific level. Magneto-mechanical modulation technology provides a promising approach to regulate lysosomal membrane permeability (LMP) and promote antigen leakage for efficient cross-presentation. This approach relies on magnetic nanorobots within lysosomes that can exert adjustable intracellular forces in response to external rotating magnetic fields. This chapter presents a comprehensive protocol for evaluating the antitumor response of DCs induced by magneto-mechanical regulation. This protocol includes a step-by-step assessment of cytotoxicity on DCs caused by magneto-mechanical regulation, analysis of nanorobot colocalization with lysosomes, and their responses (such as LMP, cytoskeleton morphology, and mitochondria function) through fluorescence imaging. Additionally, we quantify DC mechano-activation and cross-presentation efficiency using flow cytometry.
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