Fluid-Matrix Interface Triggers a Heterogeneous Activation of Macrophages
Youngmin Jo1, Hyo Min Kim1, Jongbeom Lee1
1Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea.
ACS Applied Bio Materials
|January 13, 2022
Summary
This study reveals how physical conditions influence macrophage activation. Macrophage aggregates formed in an asymmetric microenvironment showed heterogeneous activation, impacting cell interactions.
Area of Science:
- Immunology
- Cell Biology
- Biomaterials Science
Background:
- Macrophages are crucial innate immune cells with diverse functions.
- Macrophage heterogeneity is observed during inflammation, but its drivers are not fully understood.
- The impact of local physical conditions on macrophage activation heterogeneity remains unclear.
Purpose of the Study:
- To investigate the effect of local physical conditions on macrophage activation.
- To develop a novel in vitro model simulating tissue microenvironments.
- To explore the formation and activation patterns of macrophage aggregates.
Main Methods:
- Development of an in vivo fluid-matrix interface analogous culture platform.
- Formation of macrophage aggregates (MAs) at a collagen matrix-medium interface.
- Analysis of heterogeneous activation within MAs using an asymmetric microenvironment.
Main Results:
- Macrophage aggregates (MAs) spontaneously formed at the collagen matrix-medium interface.
- Macrophages within MAs exhibited heterogeneous activation patterns.
- Inhomogeneous cell-cell and cell-matrix interactions were observed within the aggregates.
Conclusions:
- Local physical conditions, simulated by an asymmetric microenvironment, induce heterogeneous macrophage activation.
- Macrophage aggregate formation and activation are influenced by the matrix-medium interface.
- This model advances understanding of macrophage heterogeneity in response to tissue microenvironments.
