Up to now, powerful genetic tools allowed clarification of the significance, dispensability and potential of cystine transporters for ferroptotic cell death in PDAC and breast cancer ( via xCT ( A high extracellular glutamate concentration was one of the first xCT inhibitors described but a few years later, erastin (standing for eradicator of RAS and small T antigen-expressing cells) was identified by Stockwell's group in RAS-mutated cancer cell lines as inhibitor of xCT transport ( in vitro studies as efficient inducer of ferroptosis in many different cancer types, including breast, PDAC, lymphoma, renal, brain and ovarian cancers ( via transsulfuration pathway is a potential resistance mechanism under cysteine depletion conditions
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Correct reconstitution (dissolving the peptide powder into sterile diluent) ensures complete peptide stability, avoids precipitation, and helps with precise dosing
We found that EE and IGF-1, but not testosterone, induced AKT phosphorylation