ETC-501 is a blood-brain barrier-permeable, orally active, and selective MNK1/MNK2 inhibitor, with an IC50 of 0.033 µM against MNK1 and 0.111 µM against MNK2. ETC-501 inhibits glioblastoma cell proliferation, impairs DNA damage repair function, delays cell cycle progression, and suppresses ribosome biogenesis. ETC-501 enhances Temozolomide (HY-17364)-induced cellular senescence, attenuates the senescence-associated secretory phenotype, and increases cellular sensitivity to Navitoclax (HY-10087). ETC-501 is applicable to research related to glioblastoma[1].