HIF‑1α inhibits ferroptosis and promotes malignant progression in non‑small cell lung cancer by activating the Hippo‑YAP signalling pathway

Zheng,Senzhong; Mo,Ji; Zhang,Jing; Chen,Yang

doi:10.3892/ol.2023.13676

HIF‑1α inhibits ferroptosis and promotes malignant progression in non‑small cell lung cancer by activating the Hippo‑YAP signalling pathway

Authors:
- Senzhong Zheng
- Ji Mo
- Jing Zhang
- Yang Chen
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Affiliations: Department of Cardiothoracic Surgery, Taizhou First People's Hospital, Taizhou, Zhejiang 318020, P.R. China, Department of Respiratory Medicine, Taizhou First People's Hospital, Taizhou, Zhejiang 318020, P.R. China, School of Medical and Pharmaceutical Engineering, Taizhou Vocational and Technical College, Taizhou, Zhejiang 318000, P.R. China, Department of Cardiothoracic Surgery, Taizhou First People's Hospital, Taizhou, Zhejiang 318020, P.R. China
Published online on: January 19, 2023 https://doi.org/10.3892/ol.2023.13676
Article Number: 90
Copyright: © Zheng et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Ferroptosis and hypoxia‑inducible factor 1α (HIF‑1α) have critical roles in human tumors. The aim of the present study was to investigate the associations between ferroptosis, HIF‑1α and cell growth in non‑small cell lung cancer (NSCLC) cells. The lung cancer cell lines SW900 and A549 were evaluated using reverse transcription‑quantitative polymerase chain reaction (RT‑qPCR) to detect the expression of HIF‑1α. Cell Counting Kit‑8, flow cytometry and Transwell migration assays were used to measure cell viability, apoptosis and invasion, respectively. The production of reactive oxygen species (ROS) and levels of malondialdehyde (MDA), glutathione (GSH) and ferrous ion (Fe2+) were determined using detection kits. The expression levels of glutathione peroxidase 4 (GPX4) and Yes‑associated protein 1 (YAP1) were detected using RT‑qPCR and western blotting. The results showed that the expression of HIF‑1α was significantly upregulated in NSCLC cells compared with normal human bronchial epithelial cells. Small interfering RNA specific to HIF‑1α (si‑HIF‑1α) significantly decreased the proliferation and invasion of NSCLC cells and increased their apoptosis. si‑HIF‑1α also increased the levels of ROS, MDA and Fe2+ but decreased GSH and GPX4 levels in A549 cells. Additionally, si‑HIF‑1α increased phosphorylated (p‑)YAP1 levels, suppressed GPX4 and YAP1 expression, and attenuated the YAP1 overexpression‑induced changes in YAP1, p‑YAP1 and GPX4 levels and cell viability. The ferroptosis antagonist ferrostatin‑1 partially attenuated the effects of si‑HIF‑1α on the NSCLC cells, while the ferroptosis agonist erastin further inhibited NSCLC growth by blocking HIF‑1α expression. In conclusion, the silencing of HIF‑1α induces ferroptosis by suppressing Hippo‑YAP pathway activation in NSCLC cells. The present study provides novel insights into the malignant progression of NSCLC and suggests that HIF‑1α is an effective target for the treatment of NSCLC.

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