NPD4928 (NPD 4928) is a small molecule that enhances ferroptosis via inhibition of ferroptosis suppressor protein 1 (FSP1).NPD4928 enhanced the sensitivity of various cancer cells to GPX4 inhibitor RSL3.

iHPCAL1 is a ferroptosis inhibitor that effectively inhibits RSL3-induced cell death, directly interacts with HPCAL1 and significantly inhibits HPCAL1 protein expression at 1.25-5 uM in HT-1080 and Calu-1 cells.iHPCAL1 delayed thermal-induced HPCAL1 protein degradation in cellular thermal shift assays (CETSAs), failed to affect the phosphorylation of PRKCQ, but inhibited the phosphorylation of HPCAL1 as well as the autophagic degradation of CDH2 induced by RSL3.The suppression of HPCAL1 phosphorylation and function induced by iHPCAL1 occurs downstream of PRKCQ phosphorylation.Bortezomib, but not chloroquine, prevented iHPCAL1-induced HPCAL1 protein degradation, iHPCAL1 stimulates the degradation of HPCAL1 through the proteasome pathway, thereby limiting ferroptosis.iHPCAL1 inhibited the anticancer activity of Imidazole ketone erastin (IKE) in a xenograft tumor model after inoculating HT-1080 cells into athymic nude mice or in an orthotopic pancreatic tumor model in which KPC cells, with no significant effect on IKE-induced GPX4 degradation in the xenograft tumor model.iHPCAL1 (10 mg/kg) protects against ferroptosis-associated acute pancreatitis in mice.

IM-93 inhibits ferroptosis and NETosis with an IC< sub>50 of 0.45 µM for cell death inhibition.

iFSP1 is a potent, selective and glutathione-independent inhibitor of ferroptosis suppressor protein 1 (FSP1/AIFM2) with EC50 of 103 nM. iFSP1 selectively induces ferroptosis in GPX4-knockout Pfa1 and HT1080 cells that overexpresses FSP1.

CuATSM is a highly potent radical-trapping antioxidant (RTA) and inhibitor of (phospho)lipid peroxidation, thereby accounting for its (their) ability to inhibit ferroptosis.

L-Buthionine-(S,R)-sulfoximine hydrochloride is a cell-permeable, potent, fast acting, orally active and irreversible inhibitor of g-glutamylcysteine synthetase and depletes cellular glutathione levels. The IC50 value of L-Buthionine-(S,R)-sulfoximine on melanoma, breast and ovarian tumor specimens are 1.9 μM, 8.6 μM, and 29 μM, respectively.

NBDHEX is a potent glutathione S-transferase P1-1 (GSTP1-1) inhibitor. NBDHEX induces apoptosis of tumor cells. NBDHEX acts as an anticancer agent by inhibiting GSTs catalytic activity, avoiding inconvenience of the inhibitor extrusion from the cell by specific pumps and disrupting the interaction between the GSTP1-1 and key signaling effectors. NBDHEX can also act as late-phase autophagy inhibitor.