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FEBS Lett. 1999 Feb 19;445(1):69-72.

Rho-kinase in human neutrophils: a role in signalling for myosin light chain phosphorylation and cell migration.

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Department of Pathology, University of Bern, Switzerland.


The role of a Rho-associated coiled-coil forming kinase in migration of neutrophils has been investigated. Rho-associated coiled-coil forming kinase I was expressed in human neutrophils. Chemotactic peptide led to a Rho-associated coiled-coil forming kinase-dependent increase in phosphorylation of myosin light chain. This was determined with the help of an antibody directed against serine 19-phosphorylated myosin light chain and an inhibitor of Rho-associated coiled-coil forming kinase (Y-27632). Y-27632 suppressed myosin light chain phosphorylation and chemotactic peptide-induced development of cell polarity and locomotion with similar potency (ED50 0.5-1.1 microM). The data strongly suggest that a Rho-associated coiled-coil forming kinase isoform, activated in human neutrophils exposed to chemotactic peptide, is important for motile functions of these cells.

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