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c-Abl and Src-family kinases cross-talk in regulation of myeloid cell migration

Anna Baruzzi1, Ilaria Iacobucci, Simona Soverini

  • 1Department of Pathology, University of Verona, Verona, Italy.

FEBS Letters
|November 12, 2009
PubMed

Insights

Src-family kinases (SFKs) and c-Abl regulate myeloid cell migration. Their cross-talk impacts cytoskeleton dynamics, GTPase activation, and neutrophil chemotaxis, offering insights into cell motility.

Area of Science:

  • Cellular Biology
  • Molecular Biology
  • Immunology

Background:

  • Cytoskeleton dynamics are crucial for cell functions, including migration.
  • Src-family tyrosine kinases (SFKs) and c-Abl are key regulators of cellular processes.
  • Dysregulated myeloid cell migration is implicated in various diseases.

Purpose of the Study:

  • To investigate the cross-talk between SFKs and c-Abl in regulating myeloid cell migration.
  • To elucidate the role of SFKs and c-Abl in the activation of small GTPases Cdc42 and Rac.
  • To assess the impact of c-Abl inhibition on human neutrophil chemotaxis.

Main Methods:

  • Utilized selective kinase inhibitors.
  • Examined cells from SFK-deficient mice.
  • Assessed tyrosine phosphorylation of c-Abl.
  • Studied the association of c-Abl with beta1 integrin-bound SFKs (Hck, c-Fgr).
  • Analyzed activation of Cdc42 and Rac GTPases.
  • Measured human neutrophil chemotactic activity.

Main Results:

  • SFK members Hck and c-Fgr regulate c-Abl tyrosine phosphorylation.
  • c-Abl associates with beta1 integrin-bound Hck or c-Fgr in macrophages.
  • c-Abl and SFKs coordinate macrophage migration and Cdc42/Rac activation.
  • c-Abl inhibition reduces human neutrophil chemotactic activity.
  • Neutrophils from chronic myeloid leukaemia patients show increased chemotaxis.

Conclusions:

  • SFKs and c-Abl engage in cross-talk to regulate myeloid cell migration.
  • This cross-talk influences cytoskeleton regulation and GTPase signaling.
  • Findings suggest a role for SFK-c-Abl signaling in neutrophil function and potential therapeutic targets.

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