ArticleCell death & disease2026
Targeting glycerophospholipid biosynthesis overcomes chemoresistance driven by SLFN11 loss in Ewing sarcoma.
Article in Cell death & disease, 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
Ewing sarcoma (EWS) is a highly aggressive pediatric malignancy characterized by elevated expression of SLFN11, which impairs DNA repair by binding to and functionally inhibiting DNA repair complexes, thereby enhancing susceptibility to genotoxic therapies. However, relapse remains a major clinical challenge and is often accompanied by the emergence of therapeutic resistance linked to reduced SLFN11 expression. We hypothesized that SLFN11-deficient tumors undergo adaptive metabolic reprogramming to overcome chemosensitivity. Here, we leverage transcriptomic and metabolomic profiling in patient-derived EWS models to demonstrate that SLFN11 loss drives downregulated mitochondrial glycerol-3-phosphate dehydrogenase (GPD2) expression, higher accumulation of glycerol-3-phosphate, fatty acid unsaturation, and enhanced glycerophospholipid (GPL) biosynthesis. Subsequently, targeting GPL biosynthesis (FSG67) restored DNA-damaging agent (SN-38) sensitivity in SLFN11-deficient EWS model, revealing a potential metabolic vulnerability to overcome chemoresistance. Furthermore, SLFN11 knockout tumors exhibited an elevated phosphocholine/glycerophosphocholine ratio, offering a potential non-invasive diagnostic biomarker.
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