作者: Robert Roskoski
DOI: 10.1016/J.PHRS.2016.12.009
关键词:
摘要: The Ras-Raf-MEK-ERK (Map kinase) cellular pathway is a highly conserved eukaryotic signaling module that transduces extracellular signals from growth factors and cytokines into intracellular regulatory events are involved in cell proliferation or the contrary of differentiation. Dysregulation this occurs more than one-third all malignancies, process has fostered development targeted Map kinase inhibitors. Cutaneous melanomas, which arise skin melanocytes, most aggressive form cancer. Mutations activate occur 90% these melanomas. This led to combination dabrafenib trametinib vemurafenib cobimetanib for treatment BRAF V600E mutant Dabrafenib target V600E/K mutants while MEK1/2. latter two agents bind MEK1/2 at site adjacent to, but separate from, ATP-binding therefore classified as type III allosteric protein These hydrogen bond with β3-lysine they make numerous hydrophobic contacts residues within αC-helix, β5 strand, activation segment, regions domain exhibit greater diversity those found site. One advantage such inhibitors do not have compete millimolar concentrations ATP, FDA-approved small molecule competitive imatinib must do. Owing wide spread neoplasms, cobimetinib being studied other cytotoxic drugs variety clinical situations. Except NRAS mutations, there no biomarkers correlated responses following inhibition discovery would represent an important therapeutic breakthrough.