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Mobile mechanical signal generator for macrophage polarization
Jiamiao Jiang1, Fei Wang1, Weichang Huang2
1NMPA Key Laboratory for Research and Evaluation of Drug Metabolism & Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences Southern Medical University Guangzhou China.
Exploration (Beijing, China)
|June 16, 2023
Summary
Researchers developed self-assembled microrobots (SMRs) that use magnetic fields to deliver precise mechanical signals, guiding macrophage polarization. This innovation offers a new method for controlling cell fate and reducing inflammation.
Area of Science:
- Biomedical Engineering
- Cell Biology
- Nanotechnology
Background:
- Mechanical signals are increasingly recognized for their role in regulating macrophage fate.
- Current methods for applying mechanical signals lack specificity, stability, and controllability.
- Existing techniques often rely on non-specific matrix properties or complex mechanical loading devices.
Purpose of the Study:
- To fabricate self-assembled microrobots (SMRs) capable of generating localized mechanical signals.
- To demonstrate the precise control of macrophage polarization using these SMRs.
- To investigate the underlying molecular pathways involved in SMR-mediated macrophage polarization.
Main Methods:
- Fabrication of SMRs using magnetic nanoparticles.
- Propulsion and wireless navigation of SMRs towards target macrophages using a rotating magnetic field (RMF).
- Mechanical signal generation via SMR rotation around macrophages.
- Analysis of macrophage polarization from M0 to M2 phenotypes and related signaling pathways (Piezo1-AP-1-CCL2).
Main Results:
- Successfully developed SMRs that can be wirelessly controlled and navigated.
- SMRs effectively generated localized mechanical signals upon rotation around macrophages.
- Macrophages were polarized to the anti-inflammatory M2 phenotype by blocking the Piezo1-activating protein-1 (AP-1)-CCL2 signaling pathway.
- Demonstrated precise regulation of macrophage polarization via mechanical signaling.
Conclusions:
- The developed SMR system provides a novel platform for mechanical signal loading.
- This technology enables precise control over macrophage polarization.
- The SMR system holds significant potential for therapeutic applications in regulating cell fate and inflammatory responses.
