Immunosuppression contributes to tumor-radiotherapy failure, but the mechanism remains elusive. Wang et al.1 reported that ionizing radiation (IR) induces YTHDF2 expression in myeloid-derived suppressor cells (MDSCs) via an IR-YTHDF2-NF-κB circuit, which contributes to MDSC expansion/migration and treatment failure. Genetic depletion or pharmacological inhibition of YTHDF2 overcomes immunosuppression and improves radiotherapy.
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