Related Experiment Video
Updated: May 29, 2026
07:53
Proteomic Profiling of Macrophages by 2D Electrophoresis
Published on: November 4, 2014
Extracellular proteolysis in macrophage migration: losing grip for a breakthrough
Christel Vérollet1, Guillaume M Charrière, Arnaud Labrousse
1Centre National de Recherche Scientifique (CNRS), Institut de Pharmacologie et de Biologie Structurale, Unité Mixte de Recherche, Département Mécanismes Moléculaires des Infections Mycobactériennes, Toulouse, France.
European Journal of Immunology
|September 29, 2011
Summary
Macrophage migration through tissues involves adapting their movement (amoeboid or mesenchymal) and using proteases for efficient infiltration. Understanding these protease roles is key for developing new anti-inflammatory therapies.
Area of Science:
- Immunology and Cell Biology
- Molecular and Cellular Mechanisms of Disease
Background:
- Macrophage infiltration is crucial in diseases like cancer and inflammation.
- Leukocyte migration was thought to be primarily amoeboid (protease-independent).
- Macrophages can switch between amoeboid and mesenchymal (protease-dependent) migration based on environment.
Purpose of the Study:
- To review the involvement of extracellular proteases in macrophage migration.
- To highlight the understudied role of proteases in macrophage tissue infiltration.
- To explore protease functions in various migration scenarios.
Main Methods:
- Focus on well-characterized protease families: matrix metalloproteinases (MMPs), cathepsins, and urokinase-type plasminogen activator (uPA).
- Review existing literature on protease involvement in macrophage diapedesis, 2D, and 3D migration.
- Synthesize findings on how environmental cues influence macrophage migration modes and protease secretion.
Main Results:
- Proteases likely play a role in all stages of macrophage migration (diapedesis, 2D, 3D).
- Macrophages integrate environmental signals to adapt migration strategy (amoeboid/mesenchymal).
- Specific proteases are secreted to facilitate efficient tissue infiltration.
Conclusions:
- Macrophage migration is a complex process involving adaptive mode selection and protease utilization.
- Protease activity is essential for macrophages to navigate and infiltrate diverse tissues.
- Further research is needed to fully elucidate the mechanisms and therapeutic potential of targeting proteases in macrophage migration.
Related Concept Videos
01:35Cancer Cell Migration through Invadopodia
Invadosome is a broad category of cell surface structures with proteolytic activity that degrades the extracellular matrix (ECM). Invadosomes are present in normal cell types, including macrophages, endothelial cells, and neurons, as well as tumor cells. Although the macrophage podosomes and tumor cell invadopodia are classified as invadosomes, they have different structures, molecular pathways, and functions. Podosomes are short structures that last for a few minutes. However, invadopodia can...
01:09Cell Migration
Cell migration, the process by which cells move from one location to another, is essential for the proper development and viability of organisms throughout their life. When cells are not able to migrate properly to their ordained locations, various disorders may occur. For example, disruption in cell migration causes chronic inflammatory diseases such as arthritis.
01:19Cell Migration
Cell migration is a process by which the cells move from one location to another, playing an essential role in embryological development, repair and regeneration, immune response, and metastasis. Cells migrate in response to chemical or mechanical signals generated by specific organs or tissues. The overall mechanism includes three steps - polarization, protrusion, and release. Polarization involves the formation of a distinct cell front and rear, which determines the direction of movement.
01:23Role of Matrix Metalloproteases in Degradation of ECM
Matrix metalloproteases (MMPs) are enzymes involved in the hydrolysis of proteins and glycoproteins of the extracellular matrix. MMPs are essential for the migration and proliferation of cells through the dense matrix network, throughout embryonic development, and throughout morphogenesis. The first MMP activity discovered was a collagenase in a tadpole's tail undergoing metamorphosis. The active collagen deposition and modifications lead to the morphogenesis of tadpoles into the adult body.
A...
A...
01:26Acute Inflammation II: Cellular Phase
The cellular phase of acute inflammation is a tightly orchestrated sequence of events that recruits leukocytes, primarily neutrophils, to sites of tissue injury or infection. Following the initial vascular changes, this phase ensures effective immune cell migration, activation, and function at the affected site to eliminate pathogens and initiate tissue repair.Leukocyte Recruitment CascadeLeukocyte recruitment happens in four steps: margination, adhesion, transmigration, and chemotaxis. Reduced...
01:17Phagocytosis of Apoptotic Cells
Cells undergoing apoptosis form apoptotic bodies that must be removed immediately to prevent inflammation, autoimmune diseases, and necrosis. Phagocytosis is carried out by professional phagocytes such as macrophages or immature dendritic cells. Non-professional phagocytes such as epithelial cells and fibroblasts also take part in this process; however, they are not as effective as professional phagocytes.
Normal cells contain receptors that prevent them from being recognized by phagocytes.
Normal cells contain receptors that prevent them from being recognized by phagocytes.