References
Query Results -- Details
MGI Accession ID: MGI:3829546
J Number: J:143972
Other Accession IDs:
Title: K-ras is critical for modulating multiple c-kit-mediated cellular functions in wild-type and Nf1+/- mast cells.
Authors: Khalaf WF; Yang FC; Chen S; White H; Bessler W; Ingram DA; Clapp DW
Journal: J Immunol
Volume: 178
Issue: 4
Date: 2007 Feb 15
Year: 2007
Pages: 2527-34
Review Status: Peer Reviewed
Abstract:
p21(ras) (Ras) proteins and GTPase-activating proteins (GAPs) tightly modulate extracellular growth factor signals and control multiple cellular functions. The specific function of each Ras isoform (H, N, and K) in regulating distinct effector pathways, and the role of each GAP in negatively modulating the activity of each Ras isoform in myeloid cells and, particularly, mast cells is incompletely understood. In this study, we use murine models of K-ras- and Nf1-deficient mice to examine the role of K-ras in modulating mast cell functions and to identify the role of neurofibromin as a GAP for K-ras in this lineage. We find that K-ras is required for c-kit-mediated mast cell proliferation, survival, migration, and degranulation in vitro and in vivo. Furthermore, the hyperactivation of these cellular functions in Nf1(+/-) mast cells is decreased in a K-ras gene dose-dependent fashion in cells containing mutations in both loci. These findings identify K-ras as a key effector in multiple mast cell functions and identify neurofibromin as a GAP for K-ras in mast cells.
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