Gamitrinib TPP hexafluorophosphate is a potent HSP90 inhibitor that specifically targets the mitochondria, demonstrating notable anti-cancer activity. It functions by inhibiting the mitochondrial matrix, making it an effective compound in cancer treatment.

Gamitrinib TPP is selectively delivered to mitochondria and does not affect Hsp90 homeostasis outside the organelle. Within a 16-hour exposure, concentrations of Gamitrinib TPP of 15-20 μM indistinguishably kill patient-derived and cultured glioblastoma cell lines. This cell death response has the hallmarks of mitochondrial apoptosis, with loss of organelle inner membrane potential, release of cytochrome c in the cytosol, activation of initiator caspase-9 and effector caspase-3 and caspase-7, and cellular reactivity for annexin V.Gamitrinib TPP (GamitrinibTPP, G-TPP), a small molecule that combines the Hsp90 ATPase inhibitory module of 17-allylamino geldanamycin (17-AAG) with the mitochondrial-targeting moiety of triphenylphosphonium.

Whether the combination of TRAIL plus Gamitrinib TPP (GamitrinibTPP, G-TPP) has activity against glioblastoma in vivo is studied.??systemic monotherapy with Gamitrinib TPP at concentrations (20 mg/kg as daily i.p. injections) that inhibit subcutaneous xenograft tumor growth in mice has no effect on orthotopic glioblastoma growth.Luciferase-expressing U87 glioblastoma cells implanted in the right cerebral striatum of immunocompromised mice give rise to rapidly growing tumors by bioluminescence imaging, and treatment of these mice with vehicle, stereotactic delivery of TRAIL, or systemic administration of suboptimal concentrations of Gamitrinib TPP does not affect tumor growth in vivo.??In contrast, 2 cycles of intracranial TRAIL combined with systemic Gamitrinib TPP suppresses the growth of established glioblastomas, with no significant animal weight loss throughout treatment.