Last updated on March 2020

MEK Inhibitor Mirdametinib (PD-0325901) in Patients With Neurofibromatosis Type 1 Associated Plexiform Neurofibromas


Brief description of study

This study evaluates PD-0325901 in the treatment of symptomatic inoperable neurofibromatosis type-1 (NF1)-associated plexiform neurofibromas (PNs). All participants will receive PD-0325901.

Detailed Study Description

Neurofibromas are benign peripheral nerve sheath tumors, which are classified as plexiform neurofibromas (PNs) if they extend longitudinally along a nerve and involve multiple fascicles. PNs are a major cause of morbidity and disfigurement in individuals with NF1, and as the tumor growth progresses, can cause a multitude of clinical deficits including pain and impaired physical function. PNs have the potential to undergo malignant transformation to Malignant Peripheral Nerve Sheet Tumors (MPNST).

PD-0325901 is an orally delivered, highly selective small-molecule inhibitor of the dual specificity kinases, MEK1 and MEK2 (MAPK/ERK Kinase) which prevents the phosphorylation and subsequent activation of mitogen-activated protein kinase (MAPK).

Previous studies of PD-0325901 demonstrated PN shrinkage and sustained inhibition of pERK. Reduced tumor volume indicated that cell proliferation or cell death may be altered in PNs with administration of PD-0325901.

Clinical Study Identifier: NCT03962543

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