Unknown

Dataset Information

0

HSPA5 Regulates Ferroptotic Cell Death in Cancer Cells.


ABSTRACT: Ferroptosis is a form of regulated cell death driven by oxidative injury promoting lipid peroxidation, although detailed molecular regulators are largely unknown. Here, we show that heatshock 70-kDa protein 5 (HSPA5) negatively regulates ferroptosis in human pancreatic ductal adenocarcinoma (PDAC) cells. Mechanistically, activating transcription factor 4 (ATF4) resulted in the induction of HSPA5, which in turn bound glutathione peroxidase 4 (GPX4) and protected against GPX4 protein degradation and subsequent lipid peroxidation. Importantly, the HSPA5-GPX4 pathway mediated ferroptosis resistance, limiting the anticancer activity of gemcitabine. Genetic or pharmacologic inhibition of the HSPA5-GPX4 pathway enhanced gemcitabine sensitivity by disinhibiting ferroptosis in vitro and in both subcutaneous and orthotopic animal models of PDAC. Collectively, these findings identify a novel role of HSPA5 in ferroptosis and suggest a potential therapeutic strategy for overcoming gemcitabine resistance. Cancer Res; 77(8); 2064-77. ©2017 AACR.

SUBMITTER: Zhu S 

PROVIDER: S-EPMC5392369 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature

altmetric image

Publications

HSPA5 Regulates Ferroptotic Cell Death in Cancer Cells.

Zhu Shan S   Zhang Qiuhong Q   Sun Xiaofan X   Zeh Herbert J HJ   Lotze Michael T MT   Kang Rui R   Tang Daolin D  

Cancer research 20170127 8


Ferroptosis is a form of regulated cell death driven by oxidative injury promoting lipid peroxidation, although detailed molecular regulators are largely unknown. Here, we show that heatshock 70-kDa protein 5 (HSPA5) negatively regulates ferroptosis in human pancreatic ductal adenocarcinoma (PDAC) cells. Mechanistically, activating transcription factor 4 (ATF4) resulted in the induction of HSPA5, which in turn bound glutathione peroxidase 4 (GPX4) and protected against GPX4 protein degradation a  ...[more]

Similar Datasets

| S-EPMC8027606 | biostudies-literature
| S-EPMC6801059 | biostudies-literature
| S-EPMC4076414 | biostudies-literature
| S-EPMC6942206 | biostudies-literature
| S-EPMC8399984 | biostudies-literature
| S-EPMC4640181 | biostudies-literature
| S-EPMC7418497 | biostudies-literature
| S-EPMC6562394 | biostudies-literature
| S-EPMC10907636 | biostudies-literature
| S-EPMC7716721 | biostudies-literature