Related Experiment Video
Updated: Jun 13, 2026
08:57
Myosin-Specific Adaptations of In vitro Fluorescence Microscopy-Based Motility Assays
Published on: February 4, 2021
Myosin IIA dependent retrograde flow drives 3D cell migration.
Biophysical Journal
|April 23, 2010
Summary
Myosin IIA is crucial for epithelial cell migration in 3D environments, enabling cell polarization and movement essential for tissue repair and development.
Area of Science:
- Cell Biology
- Developmental Biology
- Biophysics
Background:
- Epithelial cell migration is vital for embryogenesis and tissue regeneration.
- Understanding the mechanisms of cell migration in three-dimensional (3D) environments is crucial but challenging.
- Current models often overlook the complexities of 3D matrix interactions.
Discussion:
- Migrating epithelial cells exhibit an atypical polarized shape in 3D, with the nucleus leading and a contractile rear.
- Cells generate traction forces that deform the extracellular matrix (ECM) both anteriorly and posteriorly.
- Retrograde flow at the cell's leading edge is myosin II-dependent and correlates with ECM deformation.
Key Insights:
- Myosin IIA is essential for 3D epithelial cell migration; its absence leads to immobility and loss of polarization.
- Myosin IIB is not required for 3D migration, as evidenced by similar migration rates in its absence.
- The distinct roles of myosin IIA and IIB highlight their specific contributions to cell motility in different dimensional contexts.
Outlook:
- Further investigation into the precise molecular interactions of myosin IIA in 3D ECM remodeling.
- Exploring therapeutic strategies targeting myosin IIA to control cell migration in diseases like cancer metastasis.
- Developing advanced 3D models to better recapitulate in vivo cell migration dynamics.
Related Concept Videos
01:18Role 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...
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...
01:32Cytoskeletal Coordination in Cell Migration
A migrating cell changes its shape during the cyclic events of attachment and detachment from the substratum and repositions the cell organelles correspondingly. These complex events are orchestrated by the dynamic cytoskeletal network comprising actin filaments, intermediate filaments, and microtubules. Cytoskeletal crosstalk — the direct and indirect communication between the different components — is crucial for this coordination. Direct communication involves various linker proteins that...
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.
01:09Cell 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.
01:21Chemotaxis and Direction of Cell Migration
Cells can detect chemical cues in their environment and reorganize the cytoskeleton to migrate toward them or away from them. This directional migration, called chemotaxis, is essential during embryogenesis and development, immune response, tissue repair and regeneration, and reproduction. These chemical cues can either attract or repel the cell's movement. For example, axon development is determined by a combination of chemoattractants and chemorepellents that direct the growing axon towards...
01:16Cell Motility through Blebbing
Blebs are a type of membrane protrusion formed by the internal hydrostatic pressure of the cytoplasm. Blebs are observed in several cell types, including fibroblasts, immune cells, and single-celled organisms like the amoeba. The primary function of blebs is cell locomotion and apoptosis, but they are also found during necrosis and cell division. The life cycle of a bleb comprises an initiation phase followed by the expansion and retraction phases.
Blebbing Through the Matrix
In multicellular...
Blebbing Through the Matrix
In multicellular...