Mitochondrial Dysfunction and Senescence Accompany Glioblastoma Cell Death Triggered by a Putative Metabolic Inhibitor
Yadav, A.; Bhutkar, S.; Barot, S.; Dukhande, V.
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Glioblastoma (GBM) is a fatal cancer with a dismal prognosis and a dire need for novel chemotherapeutics. Metabolic reprogramming is an established hallmark of cancer. In our previous study on GBM, we aimed at targeting the metabolic reprogramming of cancer by using stiripentol (STP), a putative lactate dehydrogenase (LDH) inhibitor and an FDA-approved anti-epileptic drug. However, the precise mechanism of STPs anti-cancer activity remains unclear. We aimed to elucidate the mechanism of action of STP in GBM to further develop STP as a therapeutic. We employed a multiomic approach followed by metabolic and cellular assays. STP treatment induced genetic and metabolic alterations in GBM cells. Inhibition of LDH by STP was moderate but not potent. The cellular changes were accompanied by an increase in reactive oxygen species, a decrease in mitochondrial membrane potential, and induction of senescence in GBM cells. Our research indicates that further research in senescence-inducing agents and novel LDH inhibitors can provide novel therapeutics for GBM.
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