ArticlebioRxiv : the preprint server for biology2026
IDH-mutant inhibitors enhance the sensitivity of IDH1-mutant gliomas to cysteine-methionine deprivation and ferroptosis.
Article in bioRxiv : the preprint server for biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Cysteine is essential for synthesizing glutathione, the brain's main antioxidant, and cysteine deprivation can trigger ferroptosis. Here, using a new mouse model of IDH1-mutant glioma that recapitulates the characteristics of human IDH1-mutant low-grade gliomas, we demonstrate that IDH1-mutant glioma cells are significantly more vulnerable to cysteine deprivation alone or in combination with the ferroptosis inducer RSL3, compared to IDH1-wildtype glioma cells. In addition, treatments with the IDH-mutant inhibitors vorasidenib and ivosidenib further sensitize the cells to ferroptosis. Metabolomics analysis reveals that IDH1-mutant cells have altered cysteine and methionine metabolism with deficiency in transsulfuration, which is further exacerbated by cysteine-methionine deprivation and IDH-mutant inhibitors. Furthermore, dietary cysteine-methionine deprivation alone or in combination with convection-enhanced delivery of RSL3 or ivosidenib
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