Title : A PKC-SHP1 signaling axis desensitizes Fcγ receptor signaling by reducing the tyrosine phosphorylation of CBL and regulates FcγR mediated phagocytosis.

Pub. Date : 2014 May 7

PMID : 24886428






5 Functional Relationships(s)
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1 A PKC-SHP1 signaling axis desensitizes Fcgamma receptor signaling by reducing the tyrosine phosphorylation of CBL and regulates FcgammaR mediated phagocytosis. Tyrosine Cbl proto-oncogene Homo sapiens
2 It is well-known that Fcgamma receptor (FcgammaR) crosslinking induces the tyrosine phosphorylation of CBL which is associated with FcgammaR mediated phagocytosis, however how signaling molecules coordinate to desensitize these receptors is unclear. Tyrosine Cbl proto-oncogene Homo sapiens
3 RESULTS: Using the U937IF cell line, we observed that FcgammaR1 crosslinking induces the tyrosine phosphorylation of CBL, which is maximal at 5 min. Tyrosine Cbl proto-oncogene Homo sapiens
4 These findings suggest a mechanism for Fcgamma receptor desensitization by which a serine-threonine kinase e.g. PKC downregulates tyrosine phosphorylation dependent signaling events via the reduced tyrosine phosphorylation of the complex adapter protein, CBL. Tyrosine Cbl proto-oncogene Homo sapiens
5 These findings suggest a mechanism for Fcgamma receptor desensitization by which a serine-threonine kinase e.g. PKC downregulates tyrosine phosphorylation dependent signaling events via the reduced tyrosine phosphorylation of the complex adapter protein, CBL. Tyrosine Cbl proto-oncogene Homo sapiens