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Blood. 2009 Aug 13;114(7):1366-73. doi: 10.1182/blood-2008-08-175869. Epub 2009 Jun 11.

Activation of Wnt5A signaling is required for CXC chemokine ligand 12-mediated T-cell migration.

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  • 1Laboratory of Immunology, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA.

Abstract

Chemokines mediate the signaling and migration of T cells, but little is known about the transcriptional events involved therein. Microarray analysis of CXC chemokine ligand (CXCL) 12-treated T cells revealed that Wnt ligands are significantly up-regulated during CXCL12 treatment. Real-time polymerase chain reaction and Western blot analysis confirmed that the expression of noncanonical Wnt pathway members (eg, Wnt5A) was specifically up-regulated during CXCL12 stimulation, whereas beta-catenin and canonical Wnt family members were selectively down-regulated. Wnt5A augmented signaling through the CXCL12-CXCR4 axis via the activation of protein kinase C. Moreover, Wnt5A expression was required for CXCL12-mediated T-cell migration, and rWnt5A sensitized human T cells to CXCL12-induced migration. Furthermore, Wnt5A expression was also required for the sustained expression of CXCR4. These results were further supported in vivo using EL4 thymoma metastasis as a model of T-cell migration. Together, these data demonstrate that Wnt5A is a critical mediator of CXCL12-CXCR4 signaling and migration in human and murine T cells.

PMID:
19520808
[PubMed - indexed for MEDLINE]
PMCID:
PMC2727408
Free PMC Article

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