A Study of Mirdametinib in Combination With Palbociclib in People With Liposarcoma

Mirdametinib (PD-0325901) is a highly selective non-ATP-competitive inhibitor of MEK1 and MEK2. It significantly inhibits the phosphorylation of the MAP kinases ERK1 and ERK2, leading to impaired tumor cell growth in vitro and in vivo in a broad spectrum of human tumors

Palbociclib (IBRANCE®) is a kinase inhibitor FDA approved for the following indications: treatment of adults with hormone receptor (HR)-positive, human epidermal growth factor receptor 2 (HER2)-negative advanced or metastatic breast cancer in combination with an aromatase inhibitor as initial endocrine-based therapy in postmenopausal women or in men or fulvestrant in patients with disease progression following endocrine therapy.