Key role of proline-rich tyrosine kinase 2 in interleukin-8 (CXCL8/IL-8)-mediated human neutrophil chemotaxis

Vito Di Cioccio, Raffaele Strippoli, Cinzia Bizzarri, Giulia Troiani, Maria Neve Cervellera, Isabelle Gloaguen, Antonella Colagrande, Elisa Margherita Cattozzo, Sabrina Pagliei, Angela Santoni, Francesco Colotta, Fabrizio Mainiero, Riccardo Bertini

Research output: Contribution to journalArticlepeer-review


The signalling pathways leading to CXCL8/IL-8-induced human neutrophil migration have not been fully characterized. The present study demonstrates that CXCL8 induces tyrosine phosphorylation as well as enzymatic activity of proline-rich tyrosine kinase 2 (Pyk2), a non-receptor protein tyrosine kinase (PTK), in human neutrophils. Induction of Pyk2 tyrosine phosphorylation by CXCL8 is regulated by Src PTK activation, whereas it is unaffected by phosphatidylinositol 3-kinase activation. Inhibition of Pyk2 activation by PP1, a Src PTK inhibitor, is paralleled by the inhibition of CXCL8-mediated neutrophil chemotaxis. Among CXCL8 receptors, Src protein tyrosine kinase activation selectively regulates CXCR1-mediated polymorphonuclear neutrophil (PMN) chemotaxis. Overexpression of PykM, the kinase-dead mutant of Pyk2, blocks CXCL8-induced chemotaxis of HL-60-derived PMN-like cells, thus pinpointing the key role of Pyk2 in CXCL8-induced chemotaxis.

Original languageEnglish
Pages (from-to)407-415
Number of pages9
Issue number4
Publication statusPublished - Apr 2004

ASJC Scopus subject areas

  • Immunology


Dive into the research topics of 'Key role of proline-rich tyrosine kinase 2 in interleukin-8 (CXCL8/IL-8)-mediated human neutrophil chemotaxis'. Together they form a unique fingerprint.

Cite this