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Updated: May 24, 2026
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Production and Characterization of Human Macrophages from Pluripotent Stem Cells
Published on: April 16, 2020
MKP-1 coordinates ordered macrophage-phenotype transitions essential for stem cell-dependent tissue repair
Eusebio Perdiguero1, Yacine Kharraz, Antonio L Serrano
1Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative diseases (CIBERNED), Barcelona, Spain. eusebio.perdiguero@upf.edu
Cell Cycle (Georgetown, Tex.)
|February 25, 2012
Summary
Macrophages control stem cell repair by regulating inflammation resolution. MKP-1 and p38 MAPK signaling, via AKT and miR-21, are crucial for this process, impacting tissue homeostasis.
Area of Science:
- Cell Biology
- Immunology
- Regenerative Medicine
Background:
- Tissue repair requires coordinated inflammation and stem cell activation.
- Molecular mechanisms of macrophage-tissue cell interactions in healing are poorly understood.
- Inflammation resolution is critical for complete tissue recovery.
Purpose of the Study:
- To elucidate the molecular mechanisms of macrophage control over stem cell-dependent tissue repair.
- To investigate the role of p38 MAPK and MKP-1 in macrophage polarization and inflammation resolution.
- To identify key signaling pathways regulating these processes.
Main Methods:
- Investigated macrophage polarization switch using p38 MAPK and MKP-1.
- Studied the impact of MKP-1 loss on macrophage function and tissue repair in mice.
- Analyzed the AKT pathway regulation by miR-21 and PTEN.
- Utilized genetic and pharmacological interventions.
Main Results:
- Macrophage polarization timing is controlled by p38 MAPK and MKP-1 balance.
- MKP-1 deficiency leads to macrophage "exhaustion" and impaired tissue repair.
- The p38/MKP-1 pathway regulates AKT signaling via miR-21-dependent PTEN.
- Interference with this pathway restored homeostasis in MKP-1 deficient mice.
Conclusions:
- Macrophages are key regulators of stem cell-mediated tissue repair.
- The MKP-1/p38 MAPK/AKT/miR-21/PTEN axis is essential for inflammation resolution and tissue homeostasis.
- This pathway offers potential therapeutic targets for enhancing tissue repair and understanding inflammatory diseases.
