Signal transduction involved in MCP-1-mediated monocytic transendothelial migration.
Monocyte chemoattractant protein-1 (MCP-1) is a major chemoattractant for monocytes and T lymphocytes. The MonoMac6 cell line was used to examine MCP-1 receptor-mediated signal transduction events in relation to MCP-1-mediated monocytic transendothelial migration. MCP-1 stimulates, with distinct time courses, extracellular signal-related kinases (ERK1 and ERK2) and stress-activated protein kinases (SAPK1/JNK1 and SAPK2/ p38). SAPK1/JNK1 activation was blocked by piceatannol, indicating that it is regulated by Syk kinase, whereas SAPK2/ p38 activation was inhibited by PP2, revealing an upstream regulation by Src-like kinases. In contrast, ERK activation was insensitive to PP2 and piceatannol. Pertussis toxin, a blocker of Go/Gi proteins, abrogated MCP-1- induced ERK activation, but was without any effect on SAPK1/JNK1 and SAPK2/ p38 activation. These results underscore the major implication of Go/Gi proteins and nonreceptor tyrosine kinases in the early MCP-1 signaling. Furthermore, MCP-1-mediated chemotaxis and transendothelial migration were significantly diminished by a high concentration of SB202190, a broad SAPK inhibitor, or by SB203580, a specific inhibitor of SAPK2/ p38, and abolished by pertussis toxin treatment. Altogether, these data suggest that coordinated action of distinct signal pathways is required to produce a full response to MCP-1 in terms of monocytic locomotion.[1]References
- Signal transduction involved in MCP-1-mediated monocytic transendothelial migration. Cambien, B., Pomeranz, M., Millet, M.A., Rossi, B., Schmid-Alliana, A. Blood (2001) [Pubmed]
Annotations and hyperlinks in this abstract are from individual authors of WikiGenes or automatically generated by the WikiGenes Data Mining Engine. The abstract is from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.About WikiGenesOpen Access LicencePrivacy PolicyTerms of Useapsburg