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Related Concept Videos

Chemotaxis and Direction of Cell Migration01:21

Chemotaxis 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...
Chemotaxis in E. coli01:27

Chemotaxis in E. coli

Chemotaxis in Escherichia coli is a sensory-driven motility mechanism that enables bacteria to navigate chemical gradients, moving toward beneficial environments while avoiding harmful conditions. This process relies on a signal transduction system integrating external chemical cues with flagellar motor control.Chemoreceptors and Signal DetectionE. coli detects chemical gradients through methyl-accepting chemotaxis proteins (MCPs), which are membrane-bound chemoreceptors that sense attractants...
Cytoskeletal Coordination in Cell Migration01:32

Cytoskeletal 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...
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.
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.
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...

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In Situ Chemotaxis Assay to Examine Microbial Behavior in Aquatic Ecosystems
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Amoeboid chemotaxis: future challenges and opportunities.

Tatiana Smirnova1, Jeffrey E Segall

  • 1Department of Anatomy and Structural Biology, Albert Einstein College of Medicine, Bronx, New York 10461 , USA.

Cell Adhesion & Migration
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PubMed
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Eukaryotic amoeboid chemotaxis research advances by integrating in vivo imaging and refined pathway analysis. Understanding these cellular movements is crucial for future discoveries in cell biology.

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Area of Science:

  • Cell Biology
  • Biochemistry
  • Molecular Biology

Background:

  • Chemotaxis is the directed cell movement along chemical gradients.
  • Eukaryotic chemotaxis involves G protein-coupled receptors (GPCRs) and receptor tyrosine kinases (RTK's).
  • Signaling pathways in eukaryotic chemotaxis are complex and network-like.

Purpose of the Study:

  • To highlight the importance of in vivo imaging for understanding chemotaxis.
  • To emphasize the need for refined phenotypic analysis of signaling pathways.
  • To discuss the role of phosphoinositide 3-kinase in chemotaxis.

Main Methods:

  • Review of in vivo imaging techniques applied to chemotaxis studies.
  • Analysis of phenotypic data from signaling pathway studies.
  • Focus on phosphoinositide 3-kinase pathway in eukaryotic amoeboid chemotaxis.

Main Results:

  • In vivo imaging provides critical insights into functional requirements of chemotaxis.
  • Refined phenotypic analysis is necessary for understanding complex signaling networks.
  • Phosphoinositide 3-kinase pathway plays a significant role in eukaryotic chemotaxis.

Conclusions:

  • Integrating in vivo imaging and detailed pathway analysis will drive future advances in chemotaxis research.
  • Further mechanistic understanding of eukaryotic amoeboid chemotaxis is essential.
  • Future applications will benefit from enhanced in vivo analysis and mechanistic insights.