期刊
NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE
卷 55, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nano.2023.102714
关键词
Pancreatic adenocarcinoma; Ferroptosis; STEAP3; KRAS; Nanomedicine
In this study, iron-doped hydroxyapatite (FeHA) was evaluated as a potential nanomedicine approach for treating PDAC. The results showed that FeHA, in combination with a sublethal dose of the GPX4 inhibitor RSL3, could trigger ferroptosis in KRAS mutant PANC-1 cells while sparing normal human cells. The induction of ferroptosis by FeHA plus RSL3 was found to be dependent on the metalloreductase STEAP3 in PDAC cells.
Pancreatic ductal adenocarcinoma (PDAC) is a devastating disease with poor survival rates. Here, we evaluated iron-doped hydroxyapatite (FeHA) as a potential nanomedicine-based approach to combat PDAC. FeHA, in combination with a sublethal dose of the glutathione peroxidase 4 (GPX4) inhibitor RSL3, was found to trigger ferroptosis in KRAS mutant PANC-1 cells, but not in BxPC3 cells, while sparing normal human cells (fibroblasts and peripheral blood mononuclear cells). These findings were recapitulated in 3D spheroids generated using PDAC cells harboring wild-type versus mutant KRAS. Moreover, ferroptosis induction by FeHA plus RSL3 was reversed by the knockdown of STEAP3, a metalloreductase responsible for converting Fe3+ to Fe2+. Taken together, our data show that FeHA is capable of triggering cancer cell death in a KRAS-selective, STEAP3-dependent manner in PDAC cells.
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