Type II RAF inhibitor tovorafenib for the treatment of pediatric low-grade glioma.
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INTRODUCTION: Pediatric low-grade glioma (pLGG) is the most prevalent childhood brain tumor group, currently regarded as a chronic disease. On 23 April 2024, the U.S. FDA approved a new type II RAF inhibitor, tovorafenib (OJEMDATM), previously known as DAY101, for the treatment of patients aged 6 months and older with relapsed or refractory (R/R) pLGG harboring a BRAF fusion or rearrangement, or BRAF V600E mutation. AREAS COVERED: This article aims to review the pharmacological properties of tovorafenib and evaluate its efficacy and safety in the treatment of R/R pLGG. We conducted a systematic search of PubMed and Web of Science databases for English-language publications related to tovorafenib, including journal articles and conference abstracts, up through 20 August 2024. EXPERT OPINION: As the first and only FDA-approved medicine for children with BRAF fusions or rearrangements, which are the most common molecular alteration in pLGG, tovorafenib shows superior central nervous system penetration without the paradoxical activation of the MAPK pathway reported for type I BRAF inhibitors. Phase 1 and the pivotal phase 2 trials have demonstrated that tovorafenib monotherapy is generally well-tolerated and exhibits encouraging signs of meaningful, rapid and sustained clinical activity in children and young adults with BRAF-altered pLGG.