Cyclophosphamide (CYP) is extensively used in
tumor therapy, but its clinical application is limited by its toxic effects on the bladder. Since CYP-induced
cystitis is believed to be mediated by
acrolein (ACR), a product of lipid peroxidation that triggers ferroptosis, we hypothesized that ferroptosis might be an essential molecular mechanism underlying CYP-induced
cystitis. The purpose of this study was to test this hypothesis.
Intraperitoneal injection of CYP led to bladder
hemorrhage and
edema, along with increased oxidation,
inflammation, and cell injury. Further analysis revealed these changes were associated with altered ferroptosis markers in the bladder, such as FPN1, ACSL4, SLC7A11, and GPX4, indicating the existence of ferroptosis. Administration of ferroptosis inhibitor
dexrazoxane (DXZ) improved ferroptosis and prevented CYP-induced pathological changes in the bladder. Collectively, our study revealed that ferroptosis is an important mechanism underlying CYP-induced
cystitis, and therapeutic approaches targeting ferroptosis could be developed to treat CYP-induced
cystitis.