Study of the Rechallenge Concept in Patients With BRAF-positive Anaplastic Thyroid Cancer After Progression on Anti-BRAF Therapy

Dabrafenib is an inhibitor of some mutated forms of BRAF kinases. Trametinib is a reversible inhibitor of mitogen-activated extracellular signal-regulated kinase 1 (MEK1) and MEK2 activation and of MEK1 and MEK2 kinase activity. Dabrafenib and trametinib target two different kinases in the RAS/RAF/MEK/ERK pathway. Use of dabrafenib 623 and trametinib in combination resulted in greater growth inhibition of BRAF V600 mutation-positive tumors.