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Polarization and Characterization of M1 and M2 Human Monocyte-Derived Macrophages on Implant Surfaces
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Inflammation environment-adaptive matrix confinement for three-dimensional modulation of macrophages
Yilun Luo1,2, Sentao Hu1, Yan Li1
1MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China. liema@zju.edu.cn.
Biomaterials Science
|September 9, 2024
Summary
This study introduces an adaptive hydrogel scaffold that modulates macrophage behavior in response to inflammation. The scaffold guides macrophages towards an anti-inflammatory phenotype, offering a novel strategy for regenerative medicine.
Area of Science:
- Biomaterials Science
- Immunology
- Regenerative Medicine
Background:
- Macrophage balance is vital for tissue repair and immune response.
- Current methods for regulating macrophage phenotypes using responsive surfaces are limited by 2D constraints and manual interventions.
Purpose of the Study:
- To develop an inflammation environment-responsive, macrophage-laden hydrogel-filled scaffold.
- To investigate the impact of matrix confinement on macrophage phenotypes adaptively in a 3D environment.
Main Methods:
- Fabrication of gelatin scaffolds with controllable pore sizes.
- Preparation of poly(vinyl alcohol) (PVA)-based hydrogels with shear-thinning and ROS-sensitive degradation.
- Development of a macrophage-laden hydrogel-filled scaffold with adaptive matrix confinement.
Main Results:
- Macrophages in smaller pores exhibited an anti-inflammatory phenotype.
- Hydrogel degradation in an inflammation environment (ROS) reduced matrix confinement.
- Reduced confinement induced macrophage polarization towards an anti-inflammatory phenotype (upregulation of Arg-1, IL-10; downregulation of IL-1β, TNF-α, IL-6).
Conclusions:
- The developed 3D scaffold enables adaptive modulation of macrophage phenotypes in response to inflammation.
- This strategy offers a smart, biomimetic approach for immunomodulation and advancing regenerative medicine.
