Researchers from F. Hoffmann-La Roche Ltd. and collaborators reported the preclinical efficacy profile of mosperafenib (RO-7276389), a next-generation BRAF inhibitor designed as an MAPK paradox breaker. The compound selectively inhibits oncogenic RAF signaling while avoiding RAF dimer-driven ERK activation, thereby overcoming a key mechanistic limitation of first-generation BRAF inhibitors.