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Orlistat induces ferroptosis-like cell death of lung cancer cells |
Wenjing Zhou1, Jing Zhang3, Mingkun Yan4, Jin Wu1, Shuo Lian4, Kang Sun1, Baiqing Li5, Jia Ma2, Jun Xia2( ), Chaoqun Lian2( ) |
1. Research Center of Clinical Laboratory Science, Bengbu Medical College, Bengbu 233030, China 2. Department of Biochemistry and Molecular Biology, School of Laboratory Medicine, Bengbu Medical College, Bengbu 233030, China 3. Department of Genetics, School of Life Sciences, Bengbu Medical College, Bengbu 233000, China 4. Department of Clinical Medicine, Bengbu Medical College, Bengbu 233000, China 5. Anhui Key Laboratory of Infection and Immunity, Bengbu Medical College, Bengbu 233030, China |
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Abstract Aberrant de novo lipid synthesis is involved in the progression and treatment resistance of many types of cancers, including lung cancer; however, targeting the lipogenetic pathways for cancer therapy remains an unmet clinical need. In this study, we tested the anticancer activity of orlistat, an FDA-approved anti-obesity drug, in human and mouse cancer cells in vitro and in vivo, and we found that orlistat, as a single agent, inhibited the proliferation and viabilities of lung cancer cells and induced ferroptosis-like cell death in vitro. Mechanistically, we found that orlistat reduced the expression of GPX4, a central ferroptosis regulator, and induced lipid peroxidation. In addition, we systemically analyzed the genome-wide gene expression changes affected by orlistat treatment using RNA-seq and identified FAF2, a molecule regulating the lipid droplet homeostasis, as a novel target of orlistat. Moreover, in a mouse xenograft model, orlistat significantly inhibited tumor growth and reduced the tumor volumes compared with vehicle control (P<0.05). Our study showed a novel mechanism of the anticancer activity of orlistat and provided the rationale for repurposing this drug for the treatment of lung cancer and other types of cancer.
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Keywords
orlistat
ferroptosis
FAF2
lung cancer
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Corresponding Author(s):
Jun Xia,Chaoqun Lian
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Just Accepted Date: 05 February 2021
Online First Date: 08 June 2021
Issue Date: 27 December 2021
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