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Malignant peripheral nerve sheath (MPNST) cell lines derived from patients with neurofibromatosis type 1 (NF!) were found to have basal cAMP levels which are two-fold higher than cAMP levels in normal human adult Schwann cells (nHSC). PCR analysis also revealed that normal adult human Schwann cells express mRNA for types Ill, IV, and IX adenylyl cyclase(More)
The growth factor receptor c-Kit has several well-characterized functions during the development of numerous cell types, including red blood cells, mast cells, and melanocytes. Its role in Schwann cells has been described in transformed cells derived from malignant peripheral nerve sheath tumors from patients with neurofibromatosis type 1 (NF1 MPNST;(More)
Malignant peripheral nerve sheath tumors (MPNSTs) are characteristic of Neurofibromatosis type 1 (NF1), a human genetic disorder affecting approximately 1 in 3000 individuals. The absence of neurofibromin in Schwann cells results in hyperactivation of Ras, which contributes to Schwann cell hyperplasia. However, additional intracellular abnormalities in(More)
Neurofibromatosis type 1 (NF1) is a genetic disease caused by the loss of neurofibromin, which can lead to formation of highly invasive malignant peripheral nerve sheath tumors (MPNST). We characterized platelet-derived growth factor-beta (PDGF-beta) receptor expression levels and signal transduction pathways in NF1 MPNST cell lines and compared them with(More)
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