347MO 5-Aminolevulinic acid sonodynamic therapy in recurrent glioblastoma: A first-in-human phase 0/1 clinical trial

5-aminoleveulinic acid sonodynamic therapy (5-ALA SDT) is a drug-device strategy that exploits the metabolic liabilities of cancer. Following systemic administration of 5-ALA, incomplete tumor metabolism leads to accumulation of a photosensitive intermediary, protoporphyrin-IX (PpIX). Activation of PpIX by non-invasive, non-ablative magnetic resonance-guided focused ultrasound (MRgFUS) induces cytotoxic reactive oxygen species and tumor cell death. This first-in-human phase 0/1 study investigates the feasibility, safety, and biological effects of 5-ALA SDT in recurrent glioblastoma patients (GBM).