7-Dehydrocholesterol is an endogenous suppressor of ferroptosis.

Freitas FP, Alborzinia H, Dos Santos AF, Nepachalovich P, Pedrera L, Zilka O, Inague A, Klein C, Aroua N, Kaushal K, Kast B, Lorenz SM, Kunz V, Nehring H, Xavier da Silva TN, Chen Z, Atici S, Doll SG, Schaefer EL, Ekpo I, Schmitz W, Horling A, Imming P, Miyamoto S, Wehman AM, Genaro-Mattos TC, Mirnics K, Kumar L, Klein-Seetharaman J, Meierjohann S, Weigand I, Kroiss M, Bornkamm GW, Gomes F, Netto LES, Sathian MB, Konrad DB, Covey DF, Michalke B, Bommert K, Bargou RC, Garcia-Saez A, Pratt DA, Fedorova M, Trumpp A, Conrad M, Friedmann Angeli JP. Nature. 2024 Feb;626(7998):401-410.

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https://intranet.dkfz.de/artikel/cholesterin-vorstufe-schuetzt-krebszellen-vor-zelltod-und-macht-sie-aggressiver

https://aacrjournals.org/cdnews/news/1288/7-Dehydrocholesterol-Suppresses-Ferroptosis-and