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• W3200326480 abstract "Abstract Background: Colorectal cancer (CRC) is one of the most malignant cancers and its pathological mechanism is largely unknown.Unfolded protein response and ferroptosis are both critical factors involved in CRC development. However, their relationship in CRC remains to be explored. Methods: In this study, erastin was used to induce ferroptosis in CRC cells. Cell viability and apoptosis were assessed by CCK-8 and colony formation assayand annexin V/propidium iodide staining, respectively. Ferroptosis was confirmed by the detection of glutathione, malondialdehyde, and lipid reactive oxygen species. Unfolded protein response-related proteins and GPX4 protein were analyzed by western blotting. The CRC datasetswere analyzed using the R software, GEPIA2 and TIMER2.0. Results: The results indicated that GPX4 was decreased when treated with the ferroptosis inducer erastin. As an intrinsic protective pathway, the unfolded protein response was activated and HSPA5 was increasedduring ferroptosis. HSPA5 was found to attenuateerastin-induced GPX4 decrease, repress ferroptosis, and promote CRC cell growth both in vitro and in vivo . Mechanistically, HSPA5 bounddirectly to GPX4 andthe interaction between HSPA5 and GPX4increased when treated with erastinfor a short time period. Although the HSPA5-GPX4 interaction failed to completely reverse erastin-induced GPX4 decrease, HSPA5 slowed down GPX4 degradation process and gave CRC cells more time to adjust to erastin toxicity. Additionally, HSPA5 was demonstrated to play a diagnostic role and correlated to immune microenvironment in CRC patients. Conclusion: Our study demonstrates that increased HSPA5 was an intrinsic protective strategy to resist ferroptosis. Specifically, HSPA5 restrained ferroptosis to promote colorectal cancer development by maintaining GPX4 stability. Our study provides potential diagnostic and therapeutic targets for patients with CRC." @default.
• W3200326480 created "2021-09-27" @default.
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• W3200326480 date "2021-09-09" @default.
• W3200326480 modified "2023-10-15" @default.
• W3200326480 title "HSPA5 Repressed Ferroptosis to Promote Colorectal Cancer Development by Maintaining GPX4 Stability" @default.
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• W3200326480 doi "https://doi.org/10.21203/rs.3.rs-855955/v1" @default.
• W3200326480 hasPublicationYear "2021" @default.
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