Hyperactivation of P21ras and the Hematopoietic-Specific Rho Gtpase, Rac2, Cooperate to Alter the Proliferation of Neurofibromin-Deficient Mast Cells in Vivo and in Vitro

Abstract excerpt

Mutations in the NF1 tumor suppressor gene cause neurofibromatosis type I (NF1), a disease characterized by the formation of cutaneous neurofibromas infiltrated with a high density of degranulating mast cells. A hallmark of cell lines generated from NF1 patients or Nf1-deficient mice is their propensity to hyperproliferate. Neurofibromin, the protein encoded by NF1, negatively regulates p21(ras) activity by...

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