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Related Experiment Video

Updated: May 9, 2026

Imaging G Protein-coupled Receptor-mediated Chemotaxis and its Signaling Events in Neutrophil-like HL60 Cells
08:24

Imaging G Protein-coupled Receptor-mediated Chemotaxis and its Signaling Events in Neutrophil-like HL60 Cells

Published on: September 14, 2016

Gradient sensing during chemotaxis.

Tian Jin1

  • 1Chemotaxis Signal Section, Laboratory of Immunogenetics, NIAID, NIH, Twinbrook II Facility, 12441 Parklawn Drive, Rockville, MD 20852, United States. tjin@niaid.nih.gov

Current Opinion in Cell Biology
|July 25, 2013
PubMed
Summary
This summary is machine-generated.

Eukaryotic cells sense chemical signals using G-protein-coupled receptors (GPCRs) to guide movement, a process called chemotaxis. This review covers gradient formation, GPCR sensing, and the actin cytoskeleton signaling network.

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Area of Science:

  • Cell Biology
  • Biochemistry
  • Molecular Biology

Background:

  • Eukaryotic cells exhibit chemotaxis, migrating along chemoattractant gradients.
  • This movement is initiated by G-protein-coupled receptors (GPCRs) detecting external chemical cues.
  • GPCRs link to heterotrimeric G-proteins, initiating intracellular signaling cascades.

Purpose of the Study:

  • To review the mechanisms of chemoattractant gradient formation in vivo.
  • To elucidate the process of GPCR-mediated sensing of chemoattractant gradients.
  • To describe the signaling network regulating the actin cytoskeleton during chemotaxis.

Main Methods:

  • Literature review of studies on chemotaxis, GPCR signaling, and cytoskeleton dynamics.
  • Analysis of signaling pathways involved in translating external gradients into cellular responses.
  • Synthesis of current understanding regarding in vivo gradient formation and sensing.

Main Results:

  • Chemoattractant gradients are formed in vivo and detected by GPCRs.
  • GPCRs initiate signaling cascades involving heterotrimeric G-proteins.
  • These signals orchestrate actin cytoskeleton reorganization, driving cell migration.

Conclusions:

  • Chemotaxis relies on sophisticated GPCR/G-protein machinery to sense and respond to chemoattractant gradients.
  • A complex signaling network integrates external cues to direct actin cytoskeleton dynamics for directed cell movement.
  • Understanding these processes is crucial for various biological phenomena, including development and immunity.