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Lv X, Lan G, Zhu L, Guo Q. Breaking the Barriers of Therapy Resistance: Harnessing Ferroptosis for Effective Hepatocellular Carcinoma Therapy. J Hepatocell Carcinoma 2024; 11:1265-1278. [PMID: 38974015 PMCID: PMC11227329 DOI: 10.2147/jhc.s469449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Accepted: 06/11/2024] [Indexed: 07/09/2024] Open
Abstract
Ferroptosis is a type of cell death that relies on iron and is distinguished by the occurrence of lipid peroxidation and the buildup of reactive oxygen species. Ferroptosis has been demonstrated to have a significant impact on the advancement and resistance to treatment of hepatocellular carcinoma (HCC), thereby highlighting its potential as a viable therapeutic target. Ferroptosis was observed in HCC tissues in contrast to normal liver tissue. The inhibition of ferroptosis has been found to increase the viability of HCC cells and decrease their susceptibility to various anticancer therapies, including chemotherapy, radiotherapy, and immune checkpoint blockade. The administration of drugs that directly modulate ferroptosis regulators or induce excessive production of lipid-reactive oxygen species has demonstrated the potential to enhance the responsiveness of drug-resistant HCC cells to treatment. However, the precise mechanism underlying this phenomenon remains ambiguous. This review presents a comprehensive overview of the crucial role played by ferroptosis in enhancing the efficacy of treatment for hepatocellular carcinoma (HCC). The main aim of this study is to examine the feasibility of utilizing ferroptosis as a therapeutic approach to improve the efficacy of HCC treatment and overcome drug resistance.
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Affiliation(s)
- Xianmei Lv
- Department of Radiotherapy, Jinhua People’s Hospital, Jinhua, Zhejiang, 321000, People’s Republic of China
- Department of Oncology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, 362000, People’s Republic of China
| | - Gaochen Lan
- Department of Infectious Diseases, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, Zhejiang, 321000, People’s Republic of China
| | - Lujian Zhu
- Department of Medical Oncology, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, Zhejiang, 321000, People’s Republic of China
| | - Qiusheng Guo
- Department of Radiotherapy, Jinhua People’s Hospital, Jinhua, Zhejiang, 321000, People’s Republic of China
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Kim Y, Kang BE, Gariani K, Gariani J, Lee J, Kim HJ, Lee CW, Schoonjans K, Auwerx J, Ryu D. Loss of hepatic Sirt7 accelerates diethylnitrosamine (DEN)-induced formation of hepatocellular carcinoma by impairing DNA damage repair. BMB Rep 2024; 57:98-103. [PMID: 38303560 PMCID: PMC10910089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/16/2023] [Accepted: 12/07/2023] [Indexed: 02/03/2024] Open
Abstract
The mammalian sirtuin family (SIRT1-SIRT7) has shown diverse biological roles in the regulation and maintenance of genome stability under genotoxic stress. SIRT7, one of the least studied sirtuin, has been demonstrated to be a key factor for DNA damage response (DDR). However, conflicting results have proposed that Sirt7 is an oncogenic factor to promote transformation in cancer cells. To address this inconsistency, we investigated properties of SIRT7 in hepatocellular carcinoma (HCC) regulation under DNA damage and found that loss of hepatic Sirt7 accelerated HCC progression. Specifically, the number, size, and volume of hepatic tumor colonies in diethylnitrosamine (DEN) injected Sirt7-deficient liver were markedly enhanced. Further, levels of HCC progression markers and pro-inflammatory cytokines were significantly elevated in the absence of hepatic Sirt7, unlike those in the control. In chromatin, SIRT7 was stabilized and colocalized to damage site by inhibiting the induction of γH2AX under DNA damage. Together, our findings suggest that SIRT7 is a crucial factor for DNA damage repair and that hepatic loss-of-Sirt7 can promote genomic instability and accelerate HCC development, unlike early studies describing that Sirt7 is an oncogenic factor [BMB Reports 2024; 57(2): 98-103].
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Affiliation(s)
- Yuna Kim
- Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon 16419, Korea
| | - Baeki E. Kang
- Department of Physiology, Sungkyunkwan University School of Medicine, Suwon 16419, Korea, Gwangju 61005, Korea
| | - Karim Gariani
- Service of Endocrinology, Diabetes, Nutrition and Therapeutic Patient Education, Geneva University Hospitals, Geneva 1205, Korea
| | - Joanna Gariani
- Department of Radiology, Hirslanden Grangettes Clinic, Geneva 1224, Switzerland, Gwangju 61005, Korea
| | - Junguee Lee
- Department of Pathology, Konyang University, Daejeon 35365, Korea, Gwangju 61005, Korea
| | - Hyun-Jin Kim
- Department of Physiology, Sungkyunkwan University School of Medicine, Suwon 16419, Korea, Gwangju 61005, Korea
| | - Chang-Woo Lee
- Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon 16419, Korea
| | - Kristina Schoonjans
- Institute of Bioengineering, Ecole Polytechnique Federale de Lausanne, Lausanne 1015, Switzerland, Gwangju 61005, Korea
| | - Johan Auwerx
- Institute of Bioengineering, Ecole Polytechnique Federale de Lausanne, Lausanne 1015, Switzerland, Gwangju 61005, Korea
| | - Dongryeol Ryu
- Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon 16419, Korea
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, Korea
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Wang Z, Zhou C, Zhang Y, Tian X, Wang H, Wu J, Jiang S. From synergy to resistance: Navigating the complex relationship between sorafenib and ferroptosis in hepatocellular carcinoma. Biomed Pharmacother 2024; 170:116074. [PMID: 38147732 DOI: 10.1016/j.biopha.2023.116074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Revised: 12/17/2023] [Accepted: 12/21/2023] [Indexed: 12/28/2023] Open
Abstract
Hepatocellular carcinoma (HCC) remains a major global health burden, and sorafenib, a multi-kinase inhibitor, has shown effectiveness in the treatment of HCC and is considered as the first-line therapy for advanced HCC. However, the response to sorafenib varies among patients, and the development of drug resistance poses a prevalent obstacle. Ferroptosis, a newly characterized form of cell death featured by iron-dependent lipid peroxidation, has emerged as a critical player in the reaction to sorafenib therapy in HCC. The induction of ferroptosis has been shown to augment the anticancer benefits of sorafenib. However, it has also been observed to contribute to sorafenib resistance. This review presents a comprehensive and thorough analysis that elucidates the intricate relationship between ferroptosis and sorafenib over recent years, aiming to formulate effective therapeutic approaches for liver cancer. Based on this exploration, we propose innovative strategies intended to overcome sorafenib resistance via targeted modulation of ferroptosis.
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Affiliation(s)
- Zijian Wang
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Chunyang Zhou
- Department of Radiation Oncology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, China
| | - Yiming Zhang
- Clinical Medical Laboratory Center, Jining First People's Hospital, Shandong First Medical University, Jining, Shandong, China
| | - Xinchen Tian
- Clinical Medical Laboratory Center, Jining First People's Hospital, Shandong First Medical University, Jining, Shandong, China
| | - Haochen Wang
- Clinical Medical Laboratory Center, Jining First People's Hospital, Shandong First Medical University, Jining, Shandong, China
| | - Jibiao Wu
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China.
| | - Shulong Jiang
- Clinical Medical Laboratory Center, Jining First People's Hospital, Shandong First Medical University, Jining, Shandong, China; College of First Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China.
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Sun J, Liu Q, Jiang Y, Cai Z, Liu H, Zuo H. Engineered small extracellular vesicles loaded with miR-654-5p promote ferroptosis by targeting HSPB1 to alleviate sorafenib resistance in hepatocellular carcinoma. Cell Death Discov 2023; 9:362. [PMID: 37777559 PMCID: PMC10542782 DOI: 10.1038/s41420-023-01660-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 09/12/2023] [Accepted: 09/19/2023] [Indexed: 10/02/2023] Open
Abstract
Sorafenib (sora) is the initial therapy for patients with progressive hepatocellular carcinoma (HCC), but the emergence of drug resistance has seriously impacted its therapeutic efficacy. However, the mechanism of sora resistance remains unclear, and effective strategies to overcome drug resistance are still lacking. By establishing a sora-resistant hepatocellular carcinoma cell line, we found that Heat Shock Protein Family B (small) Member 1 (HSPB1) was markedly upregulated in sora-resistant HCC cells. Further research revealed that the ferroptosis resistance induced by HSPB1 upregulation plays a crucial role in sora resistance. In addition, we confirmed that miR-654-5p enhances sora-induced ferroptosis by binding to HSPB1 and reducing its protein levels. To enhance miRNA stability and delivery efficiency in vivo, we used small extracellular vesicles (sEV) derived from human adipose mesenchymal stem cells as miR-654-5p carriers, creating engineered sEV (m654-sEV). The research demonstrated that m654-sEV effectively delivers miR-654-5p to HCC cells, targeting HSPB1 and enhancing sora-induced ferroptosis. This improves therapeutic effects on sora-resistant HCC cells and xenograft tumors, restoring their sensitivity to sora. In summary, m654-sEV, which targets HSPB1 via miR-654-5p delivery, represents a promising strategy for addressing sora-resistant issue. The combined use of m654-sEV and sora has the potential to significantly enhance therapeutic efficacy for patients with sora-resistant HCC.
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Affiliation(s)
- Jiao Sun
- Department of Gastroenterology, Shandong Provincial hospital affiliated to Shandong First Medical University, Jinan, China
| | - Qi Liu
- Department of Gastroenterology, Shandong Provincial hospital affiliated to Shandong First Medical University, Jinan, China
| | - Yanfang Jiang
- Department of Gastroenterology, Affiliated Qingdao Central Hospital of Qingdao University, Qingdao Cancer Hospital, Qingdao, China
| | - Zhihui Cai
- Department of Gastroenterology, Shandong Provincial hospital affiliated to Shandong First Medical University, Jinan, China
- Aksu Vocational and Technical College School of Medicine, Aksu, China
| | - Hui Liu
- Department of Gastroenterology, Shandong Provincial hospital affiliated to Shandong First Medical University, Jinan, China.
| | - Huaiwen Zuo
- Department of Gastroenterology, Shandong Provincial hospital affiliated to Shandong First Medical University, Jinan, China.
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Li Q, Chen K, Zhang T, Jiang D, Chen L, Jiang J, Zhang C, Li S. Understanding sorafenib-induced ferroptosis and resistance mechanisms: Implications for cancer therapy. Eur J Pharmacol 2023; 955:175913. [PMID: 37460053 DOI: 10.1016/j.ejphar.2023.175913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 06/20/2023] [Accepted: 07/13/2023] [Indexed: 07/22/2023]
Abstract
Sorafenib is an important first-line treatment option for liver cancer due to its well-characterized safety profile. While novel first-line drugs may have better efficacy than Sorafenib, they also have limitations such as worse safety and cost-effectiveness. In addition to inducing apoptosis, Sorafenib can also trigger ferroptosis, which has recently been recognized as an immunogenic cell death, unleashing new possibilities for cancer treatment. However, resistance to Sorafenib-induced ferroptosis remains a major challenge. To overcome this resistance and augment the efficacy of Sorafenib, a wide range of nanomedicines has been developed to amplify its pro-ferroptotic effects. This review highlights the mechanisms underlying Sorafenib-triggered ferroptosis and its resistance, and outlines innovative strategies, particularly nanomedicines, to overcome ferroptosis resistance. Moreover, we summarize molecular biomarkers that signify resistance to Sorafenib-mediated ferroptosis, which can assist in predicting therapeutic outcomes.
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Affiliation(s)
- Qiuhong Li
- School of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Kexin Chen
- School of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Tianyi Zhang
- School of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Donghui Jiang
- School of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Ligang Chen
- Department of Neurosurgery, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Jun Jiang
- Department of General Surgery (Thyroid Surgery), The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, Sichuan, China; Metabolic Vascular Diseases Key Laboratory of Sichuan Province, Luzhou, 646000, Sichuan, China
| | - Chunxiang Zhang
- School of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, Sichuan, China; Nucleic Acid Medicine of Luzhou Key Laboratory, Key Laboratory of Medical Electrophysiology, Ministry of Education & Medical Electrophysiological Key Laboratory of Sichuan Province, (Collaborative Innovation Center for Prevention of Cardiovascular Diseases), Institute of Cardiovascular Research, Southwest Medical University, Luzhou, 646000, Sichuan, China.
| | - Shengbiao Li
- School of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, Sichuan, China; Nucleic Acid Medicine of Luzhou Key Laboratory, Key Laboratory of Medical Electrophysiology, Ministry of Education & Medical Electrophysiological Key Laboratory of Sichuan Province, (Collaborative Innovation Center for Prevention of Cardiovascular Diseases), Institute of Cardiovascular Research, Southwest Medical University, Luzhou, 646000, Sichuan, China.
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Zhu X, Li S. Ferroptosis, Necroptosis, and Pyroptosis in Gastrointestinal Cancers: The Chief Culprits of Tumor Progression and Drug Resistance. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2300824. [PMID: 37436087 PMCID: PMC10502844 DOI: 10.1002/advs.202300824] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 06/29/2023] [Indexed: 07/13/2023]
Abstract
In recent years, the incidence of gastrointestinal cancers is increasing, particularly in the younger population. Effective treatment is crucial for improving patients' survival outcomes. Programmed cell death, regulated by various genes, plays a fundamental role in the growth and development of organisms. It is also critical for maintaining tissue and organ homeostasis and takes part in multiple pathological processes. In addition to apoptosis, there are other types of programmed cell death, such as ferroptosis, necroptosis, and pyroptosis, which can induce severe inflammatory responses. Notably, besides apoptosis, ferroptosis, necroptosis, and pyroptosis also contribute to the occurrence and development of gastrointestinal cancers. This review aims to provide a comprehensive summary on the biological roles and molecular mechanisms of ferroptosis, necroptosis, and pyroptosis, as well as their regulators in gastrointestinal cancers and hope to open up new paths for tumor targeted therapy in the near future.
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Affiliation(s)
- Xudong Zhu
- Department of General SurgeryCancer Hospital of Dalian University of TechnologyCancer Hospital of China Medical UniversityLiaoning Cancer Hospital and InstituteShenyangLiaoning Province110042China
| | - Shenglong Li
- Second Ward of Bone and Soft Tissue Tumor SurgeryCancer Hospital of Dalian University of TechnologyCancer Hospital of China Medical UniversityLiaoning Cancer Hospital and InstituteShenyangLiaoning Province110042China
- The Liaoning Provincial Key Laboratory of Interdisciplinary Research on Gastrointestinal Tumor Combining Medicine with EngineeringShenyangLiaoning Province110042China
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Lai W, Chen J, Wang T, Liu Q. Crosstalk between ferroptosis and steroid hormone signaling in gynecologic cancers. Front Mol Biosci 2023; 10:1223493. [PMID: 37469703 PMCID: PMC10352791 DOI: 10.3389/fmolb.2023.1223493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 06/22/2023] [Indexed: 07/21/2023] Open
Abstract
Ferroptosis is a novel types of regulated cell death and is widely studied in cancers and many other diseases in recent years. It is characterized by iron accumulation and intense lipid peroxidation that ultimately inducing oxidative damage. So far, signaling pathways related to ferroptosis are involved in all aspects of determining cell fate, including oxidative phosphorylation, metal-ion transport, energy metabolism and cholesterol synthesis progress, et al. Recently, accumulated studies have demonstrated that ferroptosis is associated with gynecological oncology related to steroid hormone signaling. This review trends to summarize the mechanisms and applications of ferroptosis in cancers related to estrogen and progesterone, which is expected to provide a theoretical basis for the prevention and treatment of gynecologic cancers.
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Affiliation(s)
- Wen Lai
- Department of Obstetrics and Gynecology, The Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing, China
| | - Jianquan Chen
- Central Laboratory, Translational Medicine Research Center, The Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing, China
| | - Tianming Wang
- Central Laboratory, Translational Medicine Research Center, The Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing, China
| | - Qiaoling Liu
- Department of Obstetrics and Gynecology, The Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing, China
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Zhang R, Kang R, Tang D. Ferroptosis in gastrointestinal cancer: From mechanisms to implications. Cancer Lett 2023; 561:216147. [PMID: 36965540 DOI: 10.1016/j.canlet.2023.216147] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/16/2023] [Accepted: 03/22/2023] [Indexed: 03/27/2023]
Abstract
Ferroptosis is a form of regulated cell death that is initiated by excessive lipid peroxidation that results in plasma membrane damage and the release of damage-associated molecular patterns. In recent years, ferroptosis has gained significant attention in cancer research due to its unique mechanism compared to other forms of regulated cell death, especially caspase-dependent apoptotic cell death. Gastrointestinal (GI) cancer encompasses malignancies that arise in the digestive tract, including the stomach, intestines, pancreas, colon, liver, rectum, anus, and biliary system. These cancers are a global health concern, with high incidence and mortality rates. Despite advances in medical treatments, drug resistance caused by defects in apoptotic pathways remains a persistent challenge in the management of GI cancer. Hence, exploring the role of ferroptosis in GI cancers may lead to more efficacious treatment strategies. In this review, we provide a comprehensive overview of the core mechanism of ferroptosis and discuss its function, regulation, and implications in the context of GI cancers.
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Affiliation(s)
- Ruoxi Zhang
- Department of Surgery, UT Southwestern Medical Center, Dallas, TX, USA
| | - Rui Kang
- Department of Surgery, UT Southwestern Medical Center, Dallas, TX, USA.
| | - Daolin Tang
- Department of Surgery, UT Southwestern Medical Center, Dallas, TX, USA.
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Overcoming cancer chemotherapy resistance by the induction of ferroptosis. Drug Resist Updat 2023; 66:100916. [PMID: 36610291 DOI: 10.1016/j.drup.2022.100916] [Citation(s) in RCA: 50] [Impact Index Per Article: 50.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 12/26/2022] [Accepted: 12/27/2022] [Indexed: 12/31/2022]
Abstract
Development of resistance to chemotherapy in cancer continues to be a major challenge in cancer management. Ferroptosis, a unique type of cell death, is mechanistically and morphologically different from other forms of cell death. Ferroptosis plays a pivotal role in inhibiting tumour growth and has presented new opportunities for treatment of chemotherapy-insensitive tumours in recent years. Emerging studies have suggested that ferroptosis can regulate the therapeutic responses of tumours. Accumulating evidence supports ferroptosis as a potential target for chemotherapy resistance. Pharmacological induction of ferroptosis could reverse drug resistance in tumours. In this review article, we first discuss the key principles of chemotherapeutic resistance in cancer. We then provide a brief overview of the core mechanisms of ferroptosis in cancer chemotherapeutic drug resistance. Finally, we summarise the emerging data that supports the fact that chemotherapy resistance in different types of cancers could be subdued by pharmacologically inducing ferroptosis. This review article suggests that pharmacological induction of ferroptosis by bioactive compounds (ferroptosis inducers) could overcome chemotherapeutic drug resistance. This article also highlights some promising therapeutic avenues that could be used to overcome chemotherapeutic drug resistance in cancer.
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Na SY, Kim KS, Jung YS, Kim DK, Kim J, Cho SJ, Lee IK, Chung J, Kim JS, Choi HS. An Inverse Agonist GSK5182 Increases Protein Stability of the Orphan Nuclear Receptor ERRγ via Inhibition of Ubiquitination. Int J Mol Sci 2022; 24:ijms24010096. [PMID: 36613556 PMCID: PMC9820335 DOI: 10.3390/ijms24010096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 12/13/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022] Open
Abstract
The orphan nuclear receptor, estrogen-related receptor γ (ERRγ) is a constitutively active transcription factor involved in mitochondrial metabolism and energy homeostasis. GSK5182, a specific inverse agonist of ERRγ that inhibits transcriptional activity, induces a conformational change in ERRγ, resulting in a loss of coactivator binding. However, the molecular mechanism underlying the stabilization of the ERRγ protein by its inverse agonist remains largely unknown. In this study, we found that GSK5182 inhibited ubiquitination of ERRγ, thereby stabilizing the ERRγ protein, using cell-based assays and confocal image analysis. Y326 of ERRγ was essential for stabilization by GSK5182, as ligand-induced stabilization of ERRγ was not observed with the ERRγ-Y326A mutant. GSK5182 suppressed ubiquitination of ERRγ by the E3 ligase Parkin and subsequent degradation. The inhibitory activity of GSK5182 was strong even when the ERRγ protein level was elevated, as ERRγ bound to GSK5182 recruited a corepressor, small heterodimer partner-interacting leucine zipper (SMILE), through the activation function 2 (AF-2) domain, without alteration of the nuclear localization or DNA-binding ability of ERRγ. In addition, the AF-2 domain of ERRγ was critical for the regulation of protein stability. Mutants in the AF-2 domain were present at higher levels than the wild type in the absence of GSK5182. Furthermore, the ERRγ-L449A/L451A mutant was no longer susceptible to GSK5182. Thus, the AF-2 domain of ERRγ is responsible for the regulation of transcriptional activity and protein stability by GSK5182. These findings suggest that GSK5182 regulates ERRγ by a unique molecular mechanism, increasing the inactive form of ERRγ via inhibition of ubiquitination.
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Affiliation(s)
- Soon-Young Na
- School of Biological Sciences and Technology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Ki-Sun Kim
- School of Biological Sciences and Technology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Yoon Seok Jung
- School of Biological Sciences and Technology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Don-Kyu Kim
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Jina Kim
- New Drug Development Center, Daegu Gyeongbuk Medical Innovation Foundation, Daegu 41061, Republic of Korea
| | - Sung Jin Cho
- Center for Brain Disorders, Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - In-Kyu Lee
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu 41944, Republic of Korea
- Research Institute of Aging and Metabolism, Kyungpook National University, Daegu 41940, Republic of Korea
| | - Jongkyeong Chung
- SRC Center for Systems Geroscience, Institute of Molecular Biology and Genetics, School of Biological Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Jeong-Sun Kim
- Department of Chemistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Hueng-Sik Choi
- School of Biological Sciences and Technology, Chonnam National University, Gwangju 61186, Republic of Korea
- Correspondence: ; Tel.: +82-62-530-0503
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