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Related Concept Videos

Role of Myosin in Cell Migration01:18

Role of Myosin in Cell Migration

Myosins are multimeric motor proteins involved in various cellular processes such as migration, adhesion, and proliferation. Myosin II is the most common type in animal cells, which binds and cross-links actin filaments.
Myosin II  is a hexamer comprising two heavy chains with globular heads and coiled-coil tails, two regulatory light chains, and two essential light chains. The ATPase sites on the myosin heads hydrolyze ATP, and the released phosphate generates the force for contraction. It is...
Cell Migration01:09

Cell 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.
Cell Migration01:19

Cell 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.
Mechanism of Lamellipodia Formation01:31

Mechanism of Lamellipodia Formation

Cells migrating in response to external stimuli form lamellipodia, which are thin membrane protrusions supported by a mesh of linked, branched, or unbranched actin filaments. These actin filaments interact with myosin motor proteins, creating the dynamic actomyosin complex within the cytoskeleton. Contractility, or the ability to generate contractile stress, is inherent to the actomyosin complex. It helps cells detect the stiffness of the surrounding ECM and exert contractile force for...
Actin Polymerization and Cell Motility01:13

Actin Polymerization and Cell Motility

Actin is a family of globular proteins that are highly abundant in eukaryotic cells. It makes up approximately 1-5% of total cell protein concentration. Actin monomers polymerize to form a complex network of polarized filaments, the actin cytoskeleton, that plays a crucial role in many cellular processes, including cell motility, division, endocytosis, and metastasis of cancer cells.
Actin cytoskeleton dynamics can produce pushing, pulling, and resistance forces that help the cell to migrate.
Inflammation01:38

Inflammation

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Related Experiment Video

Updated: May 11, 2026

Isolation of Peritoneum-derived Mast Cells and Their Functional Characterization with Ca2+-imaging and Degranulation Assays
11:31

Isolation of Peritoneum-derived Mast Cells and Their Functional Characterization with Ca2+-imaging and Degranulation Assays

Published on: July 4, 2018

Microfilaments make mast cells migrate (rather than degranulate).

Michael Huber1

  • 1Institute of Biochemistry and Molecular Immunology, RWTH Aachen University, Aachen, Germany. mhuber@ukaachen.de

European Journal of Immunology
|May 31, 2013
PubMed
Summary
This summary is machine-generated.

Mast cells use FcεRI and KIT receptors for distinct functions. New research shows that controlling actin polymerization transforms KIT signaling, impacting mast cell degranulation and chemotaxis.

Keywords:
AllergologyAsthmaCell migrationCellular activationMast cells

More Related Videos

Investigating Mast Cell Secretory Granules; from Biosynthesis to Exocytosis
16:01

Investigating Mast Cell Secretory Granules; from Biosynthesis to Exocytosis

Published on: January 26, 2015

Related Experiment Videos

Last Updated: May 11, 2026

Isolation of Peritoneum-derived Mast Cells and Their Functional Characterization with Ca2+-imaging and Degranulation Assays
11:31

Isolation of Peritoneum-derived Mast Cells and Their Functional Characterization with Ca2+-imaging and Degranulation Assays

Published on: July 4, 2018

Investigating Mast Cell Secretory Granules; from Biosynthesis to Exocytosis
16:01

Investigating Mast Cell Secretory Granules; from Biosynthesis to Exocytosis

Published on: January 26, 2015

Area of Science:

  • Immunology
  • Cell Biology

Background:

  • Mast cells are key immune cells involved in inflammation.
  • FcεRI and KIT are critical surface receptors on mast cells.
  • FcεRI activation leads to degranulation, while KIT activation promotes chemotaxis.

Purpose of the Study:

  • To investigate the role of actin dynamics in FcεRI and KIT mediated mast cell responses.
  • To understand how modulating actin polymerization affects mast cell degranulation and chemotaxis.

Main Methods:

  • Pharmacological suppression of F-actin formation.
  • Analysis of mast cell degranulation and chemotaxis.
  • Comparison of FcεRI and KIT signaling pathways.

Main Results:

  • Actin polymerization is crucial for differential mast cell responses.
  • Suppression of F-actin formation converts KIT activation into a potent degranulation trigger.
  • KIT activation, normally associated with chemotaxis, can induce degranulation when actin dynamics are altered.

Conclusions:

  • Actin de- and repolymerization are critical determinants of mast cell functional outcomes.
  • Modulating actin dynamics offers potential therapeutic strategies for mast cell-related disorders.
  • Understanding these mechanisms provides insights into mast cell physiology and pathophysiology.