The Src family kinases Hck, Fgr, and Lyn are critical for the generation of the in vivo inflammatory environment without a direct role in leukocyte recruitment

Miklo´s Kova´cs, Tama´s Ne´meth, Zolta´n Jakus, Cassian Sitaru, Edina Simon, Krisztina Futosi, Ba´lint Botz, Zsuzsanna Helyes, Clifford A. Lowell, Attila Mo´csai

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61 Citations (Scopus)


Although Src family kinases participate in leukocyte function in vitro, such as integrin signal transduction, their role in inflammation in vivo is poorly understood. We show that Src family kinases play a critical role in myeloid cell-mediated in vivo inflammatory reactions. Mice lacking the Src family kinases Hck, Fgr, and Lyn in the hematopoietic compartment were completely protected from autoantibody-induced arthritis and skin blistering disease, as well as from the reverse passive Arthus reaction, with functional overlap between the three kinases. Though the overall phenotype resembled the leukocyte recruitment defect observed in β2 integrin-deficient (CD18-/-) mice, Hck-/-Fgr-/-Lyn-/- neutrophils and monocytes/macrophages had no cellautonomous in vivo or in vitro migration defect. Instead, Src family kinases were required for the generation of the inflammatory environment in vivo and for the release of proinflammatory mediators from neutrophils and macrophages in vitro, likely due to their role in Fcγ receptor signal transduction. Our results suggest that infiltrating myeloid cells release proinflammatory chemokine, cytokine, and lipid mediators that attract further neutrophils and monocytes from the circulation in a CD18-dependent manner. Src family kinases are required for the generation of the inflammatory environment but not for the intrinsic migratory ability of myeloid cells.

Original languageEnglish
Pages (from-to)1993-2011
Number of pages19
JournalJournal of Experimental Medicine
Issue number10
Publication statusPublished - Jan 1 2014


ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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