ACSL4 suppresses glioma cells proliferation via activating ferroptosis

Cheng,Jing; Fan,Yan‑Qin; Liu,Bao‑Hui; Zhou,Han; Wang,Jun‑Min; Chen,Qian‑Xue

doi:10.3892/or.2019.7419

ACSL4 suppresses glioma cells proliferation via activating ferroptosis

Authors:
- Jing Cheng
- Yan‑Qin Fan
- Bao‑Hui Liu
- Han Zhou
- Jun‑Min Wang
- Qian‑Xue Chen
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Affiliations: Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China , Department of Nephrology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China , Department of Neurosurgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
Published online on: November 27, 2019 https://doi.org/10.3892/or.2019.7419
Pages: 147-158
Copyright: © Cheng et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Acyl‑CoA synthetase long‑chain family member 4 (ACSL4) is a member of the long chain family of acyl‑CoA synthetase proteins, which have recently been shown to serve an important role in ferroptosis. Previous studies have suggested that ferroptosis is involved in the occurrence of glioma; however, the role of ACSL4 in glioma remains unknown. In the present study, a reduction of ferroptosis in human glioma tissues and glioma cells was observed. Subsequently, it was demonstrated that the expression of ACSL4 was also downregulated in human glioma tissues and cells. A ferroptosis inhibitor and inducer were used to investigate the effects of ferroptosis on viability. The results showed that promoting ferroptosis inhibited the proliferation of glioma cells, and that the use of inducers had the reverse effect. Therefore, it was hypothesized that the reduction in ACSL4 expression may have been involved in ferroptosis and proliferation in glioma. Overexpression of ACSL4 decreased expression of glutathione peroxidase 4 and increased the levels of ferroptotic markers, including 5‑hydroxyeicosatetraenoic (HETE), 12‑HETE and 15‑HETE. Additionally, ACSL4 overexpression resulted in an increase in lactate dehydrogenase release and a reduction in cell viability. The opposite results were observed when ACSL4 was silenced. These findings suggest that ACSL4 regulates ferroptosis and proliferation of glioma cells. To further investigate the mechanism underlying ACSL4‑mediated regulation of proliferation in glioma cells, cells were treated with small interfering (si)‑ACSL4 and sorafenib, a ferroptosis inducer. sorafenib attenuated the ability of siRNA‑mediated silencing of ACSL4, thus improving cell viability. These results demonstrate that ACSL4 protects glioma cells and exerts anti‑proliferative effects by activating a ferroptosis pathway and highlight the pivotal role of ferroptosis regulation by ACSL4 in its protective effects on glioma. Therefore, ACSL4 may serve as a novel therapeutic target for the treatment of glioma.

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