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Zeng L, Liu X, Geng C, Gao X, Liu L. Ferroptosis in cancer (Review). Oncol Lett 2024; 28:304. [PMID: 38774452 PMCID: PMC11106693 DOI: 10.3892/ol.2024.14437] [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: 10/24/2023] [Accepted: 04/05/2024] [Indexed: 05/24/2024] Open
Abstract
Ferroptosis is a type of programmed cell death depending on iron and reactive oxygen species. This unique cell death process has attracted a great deal of attention in the field of cancer research over the past decade. Research on the association of ferroptosis signal pathways and cancer development indicated that targeting ferroptosis has great potential for cancer therapy. In the present study, the latest research progress of ferroptosis was reviewed, focusing on the relationship between ferroptosis and the development of cancer, in order to further promote the clinical application of ferroptosis in cancer.
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Affiliation(s)
- Liyi Zeng
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, Jinan University, Guangzhou, Guangdong 510632, P.R. China
| | - Xiaohui Liu
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, Jinan University, Guangzhou, Guangdong 510632, P.R. China
| | - Chengjie Geng
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, Jinan University, Guangzhou, Guangdong 510632, P.R. China
| | - Xuejuan Gao
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, Jinan University, Guangzhou, Guangdong 510632, P.R. China
| | - Langxia Liu
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, Jinan University, Guangzhou, Guangdong 510632, P.R. China
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2
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Chen Y, Pan G, Wu F, Zhang Y, Li Y, Luo D. Ferroptosis in thyroid cancer: Potential mechanisms, effective therapeutic targets and predictive biomarker. Biomed Pharmacother 2024; 177:116971. [PMID: 38901201 DOI: 10.1016/j.biopha.2024.116971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2024] [Revised: 05/28/2024] [Accepted: 06/15/2024] [Indexed: 06/22/2024] Open
Abstract
Thyroid cancer is a prevalent endocrine malignancy whose global incidence has risen over the past several decades. Ferroptosis, a regulated form of cell death distinguished by the excessive buildup of iron-dependent lipid peroxidates, stands out from other programmed cell death pathways in terms of morphological and molecular characteristics. Increasing evidence suggests a close association between thyroid cancer and ferroptosis, that is, inducing ferroptosis effectively suppresses the proliferation of thyroid cancer cells and impede tumor advancement. Therefore, ferroptosis represents a promising therapeutic target for the clinical management of thyroid cancer in clinical settings. Alterations in ferroptosis-related genes hold potential for prognostic prediction in thyroid cancer. This review summarizes current studies on the role of ferroptosis in thyroid cancer, elucidating its mechanisms, therapeutic targets, and predictive biomarkers. The findings underscore the significance of ferroptosis in thyroid cancer and offer valuable insights into the development of innovative treatment strategies and accurate predictors for the thyroid cancer.
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Affiliation(s)
- Yuying Chen
- The Fourth Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, China
| | - Gang Pan
- Department of Surgical Oncology, Hangzhou First People's Hospital, Westlake University School of Medicine, Hangzhou, Zhejiang 310006, China
| | - Fan Wu
- Department of Surgical Oncology, Hangzhou First People's Hospital, Westlake University School of Medicine, Hangzhou, Zhejiang 310006, China
| | - Yu Zhang
- Department of Surgical Oncology, Hangzhou First People's Hospital, Westlake University School of Medicine, Hangzhou, Zhejiang 310006, China
| | - Yuanhui Li
- Department of Surgical Oncology, Hangzhou First People's Hospital, Westlake University School of Medicine, Hangzhou, Zhejiang 310006, China.
| | - Dingcun Luo
- The Fourth Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, China; Department of Surgical Oncology, Hangzhou First People's Hospital, Westlake University School of Medicine, Hangzhou, Zhejiang 310006, China.
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3
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Lu L, Jifu C, Xia J, Wang J. E3 ligases and DUBs target ferroptosis: A potential therapeutic strategy for neurodegenerative diseases. Biomed Pharmacother 2024; 175:116753. [PMID: 38761423 DOI: 10.1016/j.biopha.2024.116753] [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: 03/14/2024] [Revised: 04/30/2024] [Accepted: 05/10/2024] [Indexed: 05/20/2024] Open
Abstract
Ferroptosis is a form of cell death mediated by iron and lipid peroxidation (LPO). Recent studies have provided compelling evidence to support the involvement of ferroptosis in the pathogenesis of various neurodegenerative diseases (NDDs), such as Alzheimer's disease (AD), Parkinson's disease (PD). Therefore, understanding the mechanisms that regulate ferroptosis in NDDs may improve disease management. Ferroptosis is regulated by multiple mechanisms, and different degradation pathways, including autophagy and the ubiquitinproteasome system (UPS), orchestrate the complex ferroptosis response by directly or indirectly regulating iron accumulation or lipid peroxidation. Ubiquitination plays a crucial role as a protein posttranslational modification in driving ferroptosis. Notably, E3 ubiquitin ligases (E3s) and deubiquitinating enzymes (DUBs) are key enzymes in the ubiquitin system, and their dysregulation is closely linked to the progression of NDDs. A growing body of evidence highlights the role of ubiquitin system enzymes in regulating ferroptosis sensitivity. However, reports on the interaction between ferroptosis and ubiquitin signaling in NDDs are scarce. In this review, we first provide a brief overview of the biological processes and roles of the UPS, summarize the core molecular mechanisms and potential biological functions of ferroptosis, and explore the pathophysiological relevance and therapeutic implications of ferroptosis in NDDs. In addition, reviewing the roles of E3s and DUBs in regulating ferroptosis in NDDs aims to provide new insights and strategies for the treatment of NDDs. These include E3- and DUB-targeted drugs and ferroptosis inhibitors, which can be used to prevent and ameliorate the progression of NDDs.
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Affiliation(s)
- Linxia Lu
- College of Basic Medicine, Jiamusi University, Jiamusi 154007, People's Republic of China
| | - Cili Jifu
- College of Basic Medicine, Jiamusi University, Jiamusi 154007, People's Republic of China
| | - Jun Xia
- College of Basic Medicine, Jiamusi University, Jiamusi 154007, People's Republic of China
| | - Jingtao Wang
- College of Basic Medicine, Jiamusi University, Jiamusi 154007, People's Republic of China.
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Zhou Q, Meng Y, Li D, Yao L, Le J, Liu Y, Sun Y, Zeng F, Chen X, Deng G. Ferroptosis in cancer: From molecular mechanisms to therapeutic strategies. Signal Transduct Target Ther 2024; 9:55. [PMID: 38453898 PMCID: PMC10920854 DOI: 10.1038/s41392-024-01769-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 01/21/2024] [Accepted: 02/03/2024] [Indexed: 03/09/2024] Open
Abstract
Ferroptosis is a non-apoptotic form of regulated cell death characterized by the lethal accumulation of iron-dependent membrane-localized lipid peroxides. It acts as an innate tumor suppressor mechanism and participates in the biological processes of tumors. Intriguingly, mesenchymal and dedifferentiated cancer cells, which are usually resistant to apoptosis and traditional therapies, are exquisitely vulnerable to ferroptosis, further underscoring its potential as a treatment approach for cancers, especially for refractory cancers. However, the impact of ferroptosis on cancer extends beyond its direct cytotoxic effect on tumor cells. Ferroptosis induction not only inhibits cancer but also promotes cancer development due to its potential negative impact on anticancer immunity. Thus, a comprehensive understanding of the role of ferroptosis in cancer is crucial for the successful translation of ferroptosis therapy from the laboratory to clinical applications. In this review, we provide an overview of the recent advancements in understanding ferroptosis in cancer, covering molecular mechanisms, biological functions, regulatory pathways, and interactions with the tumor microenvironment. We also summarize the potential applications of ferroptosis induction in immunotherapy, radiotherapy, and systemic therapy, as well as ferroptosis inhibition for cancer treatment in various conditions. We finally discuss ferroptosis markers, the current challenges and future directions of ferroptosis in the treatment of cancer.
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Affiliation(s)
- Qian Zhou
- Department of Dermatology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
- National Engineering Research Center of Personalized Diagnostic and Therapeutic Technology, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
- Furong Laboratory, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
| | - Yu Meng
- Department of Dermatology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
- National Engineering Research Center of Personalized Diagnostic and Therapeutic Technology, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
- Furong Laboratory, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
| | - Daishi Li
- Department of Dermatology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
- National Engineering Research Center of Personalized Diagnostic and Therapeutic Technology, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
- Furong Laboratory, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
| | - Lei Yao
- Department of General Surgery, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
| | - Jiayuan Le
- Department of Dermatology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
- National Engineering Research Center of Personalized Diagnostic and Therapeutic Technology, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
- Furong Laboratory, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
| | - Yihuang Liu
- Department of Dermatology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
- National Engineering Research Center of Personalized Diagnostic and Therapeutic Technology, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
- Furong Laboratory, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
| | - Yuming Sun
- Department of Plastic and Cosmetic Surgery, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan Province, China
| | - Furong Zeng
- Department of Oncology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan Province, China.
| | - Xiang Chen
- Department of Dermatology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan Province, China.
- National Engineering Research Center of Personalized Diagnostic and Therapeutic Technology, 87 Xiangya Road, Changsha, 410008, Hunan Province, China.
- Furong Laboratory, 87 Xiangya Road, Changsha, 410008, Hunan Province, China.
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan Province, China.
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, 87 Xiangya Road, Changsha, 410008, Hunan Province, China.
| | - Guangtong Deng
- Department of Dermatology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan Province, China.
- National Engineering Research Center of Personalized Diagnostic and Therapeutic Technology, 87 Xiangya Road, Changsha, 410008, Hunan Province, China.
- Furong Laboratory, 87 Xiangya Road, Changsha, 410008, Hunan Province, China.
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan Province, China.
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, 87 Xiangya Road, Changsha, 410008, Hunan Province, China.
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Yang H, Cai X, Qiu M, Deng C, Xue H, Zhang J, Yang W, XianZhong W. Heat stress induces ferroptosis of porcine Sertoli cells by enhancing CYP2C9-Ras- JNK axis. Theriogenology 2024; 215:281-289. [PMID: 38103405 DOI: 10.1016/j.theriogenology.2023.11.027] [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: 08/04/2023] [Revised: 11/16/2023] [Accepted: 11/28/2023] [Indexed: 12/19/2023]
Abstract
Heat stress leads to the accumulation of lipid peroxides in Sertoli cells. Unrestricted lipid peroxidation of catalyzed polyunsaturated fatty acids by Cytochrome P450 (CYP) drive the ferroptosis. However, little is known about the role of CYP cyclooxygenase in heat stress-induced ferroptosis in Sertoli cells. In this study, we investigated the relationship between CYP cyclooxygenase and heat stress-induced ferroptosis in porcine Sertoli cells, as well as whether Ras-JNK signaling is involved in the process. The results showed that heat stress significantly increased the expression of cytochrome P450 cyclooxygenase 2C9 (CYP2C9) and the content of epoxyeicosatrienoic acids (EETs), although there are no significant effect on the expression of cytochrome P450 cyclooxygenase 2J2 (CYP2J2) and cytochrome P450 cyclooxygenase 2C8 (CYP2C8). In addition, heat stress reduced the cell viability, the protein expression level of glutathione peroxidase 4 (GPX4) and Ferritin (all P < 0.01) while increased the level of intracellular reactive oxygen species (ROS) and the protein level of Transferrin receptor 1(TFR1) (both P < 0.01), as well as activating the Ras-JNK signaling pathway. Ferrostatin-1, a ferroptosis-specific inhibitor, reduced ROS levels and the protein level of TFR1 (both P < 0.01), but elevated the cell viability, the protein level of GPX4, and Ferritin (all P < 0.01). Sulfaphenazole, a specific inhibitor of CYP2C9 or two small interfering RNAs targaring CYP2C9 enhanced the cell viability (all P < 0.01), while reduced the content of EETs (all P < 0.01) and inhibited the Ras-JNK signaling and ferroptosis under heat stress. Salirasib, a specific inhibitor of Ras, significantly elevated the cell viability, whereas reduced the level of intracellular ROS and inhibited the phosphorylation of JNK, and alleviated heat stress-induced ferroptosis in porcine Sertoli cells. Notably, there is no effect on the expression of CYP2C9 and the content of EETs. These results indicate that heat stress can induce ferroptosis in Sertoli cells by increasing the expression of CYP2C9 and the content of EETs, which in true activates the Ras-JNK signaling pathway, but there is no feedback from Ras-JNK signaling to the expression of CYP2C9. Our study finds a novel heat stress-induced cell death model of Sertoli cells as well as providing the therapeutic potential for anti-ferroptosis.
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Affiliation(s)
- Huan Yang
- Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China
| | - XiaQing Cai
- Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China
| | - MeiJia Qiu
- Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China
| | - ChengChen Deng
- Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China
| | - HongYan Xue
- Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China
| | - JiaoJiao Zhang
- Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China
| | - Weirong Yang
- Institute of Ecology China West Normal University, Yuying Road No.81, Shunqing District, Nanchong City, Sichuan Province, PR China
| | - Wang XianZhong
- Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China.
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Chen C, Yang Y, Guo Y, He J, Chen Z, Qiu S, Zhang Y, Ding H, Pan J, Pan Y. CYP1B1 inhibits ferroptosis and induces anti-PD-1 resistance by degrading ACSL4 in colorectal cancer. Cell Death Dis 2023; 14:271. [PMID: 37059712 PMCID: PMC10104818 DOI: 10.1038/s41419-023-05803-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 04/05/2023] [Accepted: 04/06/2023] [Indexed: 04/16/2023]
Abstract
Immune checkpoint blockade (ICB) is a promising treatment strategy for colorectal cancer (CRC) patients. However, most CRC patients do not response well to ICB therapy. Increasing evidence indicates that ferroptosis plays a critical role in immunotherapy. ICB efficacy may be enhanced by inducing tumor ferroptosis. Cytochrome P450 1B1 (CYP1B1) is a metabolic enzyme that participates in arachidonic acid metabolism. However, the role of CYP1B1 in ferroptosis remains unclear. In this study, we demonstrated that CYP1B1 derived 20-HETE activated the protein kinase C pathway to increase FBXO10 expression, which in turn promoted the ubiquitination and degradation of acyl-CoA synthetase long-chain family member 4 (ACSL4), ultimately inducing tumor cells resistance to ferroptosis. Furthermore, inhibiting CYP1B1 sensitized tumor cells to anti-PD-1 antibody in a mouce model. In addition, CYP1B1 expression was negatively correlated with ACSL4 expression, and high expression indicates poor prognosis in CRC. Taken together, our work identified CYP1B1 as a potential biomarker for enhancing anti-PD-1 therapy in CRC.
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Affiliation(s)
- Congcong Chen
- Department of General Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Yabing Yang
- Department of General Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Yanguan Guo
- Department of General Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Jiashuai He
- Department of General Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Zuyang Chen
- Department of General Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Shenghui Qiu
- Department of General Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Yiran Zhang
- Department of General Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Hui Ding
- Department of General Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, China.
| | - Jinghua Pan
- Department of General Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, China.
| | - Yunlong Pan
- Department of General Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, China.
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes. Institute of Life and Health Engineering, Jinan University, Guangzhou, China.
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Liu Y, Yuan Y, Yan Y, Wang R, Wang Z, Liu X, Zhang Y, Hua J, Wang Y, Zhao L. Mitochondrial pyruvate carrier 1 alleviates hypoxic-ischemic brain injury in rats. Life Sci 2023; 325:121686. [PMID: 37030616 DOI: 10.1016/j.lfs.2023.121686] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 03/28/2023] [Accepted: 04/05/2023] [Indexed: 04/10/2023]
Abstract
AIMS Mitochondrial dysfunction is a critical pathological change in cerebral ischemia. Mitochondrial pyruvate carrier 1 (MPC1) is a mitochondrial inner membrane protein carrier participating in pyruvate transport. The work is aiming to figure out the effect of MPC1 on cerebral ischemia. MAIN METHODS Bilateral internal carotid artery embolization (BICAO) rats model and cells model from oxygen glucose deprivation/reoxygenation (OGD/R) were used to simulate cerebral ischemia in vivo and in vitro. The effect of MPC1 on cerebral ischemia was detected by imaging, behavioral test, immunofluorescence, flow cytometry, transmission electron microscopy, Western blot and RT-Q-PCR. RNA-sequence (RNA-seq) was applied to explore the potential molecular mechanisms underlying the role of MPC1 in cerebral ischemia. KEY FINDING After BICAO or OGD/R treatment, MPC1 expression in ischemic cortical neurons was significantly decreased, and MPC1 deficiency significantly reduced cerebral blood flow, decreased locomotion activities, and exacerbated neuronal injury. Moreover, MPC1 deficiency obviously aggravated oxidative stress, structural disruption and dysfunction of mitochondria, autophagy and calcium overload of ischemic cortical neurons. Interestingly, MPC1 overexpression remarkably reversed neuronal loss and persisting neuronal deficits induced by OGD. Using RNA-seq, 38 MPC1-associated differentially expressed genes were involved in oxidative stress, autophagy and calcium overload. Our results further confirmed that MPC1 could alleviate autophagy via the PI3K/Akt/mTOR pathway in the ischemic cortical neurons. SIGNIFICANCE MPC1 may exert neuroprotective effects by attenuating oxidative stress, mitochondrial dysfunction, calcium overload and autophagy during cerebral ischemia. MPC1-related genes identified by RNA-seq may be a novel therapeutic target for cerebral ischemia.
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Affiliation(s)
- Yue Liu
- Department of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Yuan Yuan
- Department of Pathology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Yi Yan
- Department of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Ruyue Wang
- Department of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Zhaohui Wang
- Department of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Xiao Liu
- Department of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Ying Zhang
- Department of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Jianyu Hua
- Department of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Yue Wang
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, China; Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, China
| | - Li Zhao
- Department of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, China.
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Sarkar S, Karmakar S, Basu M, Ghosh P, Ghosh MK. Neurological damages in COVID-19 patients: Mechanisms and preventive interventions. MedComm (Beijing) 2023; 4:e247. [PMID: 37035134 PMCID: PMC10080216 DOI: 10.1002/mco2.247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 02/14/2023] [Accepted: 03/01/2023] [Indexed: 04/11/2023] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), a novel coronavirus, causes coronavirus disease 2019 (COVID-19) which led to neurological damage and increased mortality worldwide in its second and third waves. It is associated with systemic inflammation, myocardial infarction, neurological illness including ischemic strokes (e.g., cardiac and cerebral ischemia), and even death through multi-organ failure. At the early stage, the virus infects the lung epithelial cells and is slowly transmitted to the other organs including the gastrointestinal tract, blood vessels, kidneys, heart, and brain. The neurological effect of the virus is mainly due to hypoxia-driven reactive oxygen species (ROS) and generated cytokine storm. Internalization of SARS-CoV-2 triggers ROS production and modulation of the immunological cascade which ultimately initiates the hypercoagulable state and vascular thrombosis. Suppression of immunological machinery and inhibition of ROS play an important role in neurological disturbances. So, COVID-19 associated damage to the central nervous system, patients need special care to prevent multi-organ failure at later stages of disease progression. Here in this review, we are selectively discussing these issues and possible antioxidant-based prevention therapies for COVID-19-associated neurological damage that leads to multi-organ failure.
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Affiliation(s)
- Sibani Sarkar
- Division of Cancer Biology and Inflammatory DisorderSignal Transduction in Cancer and Stem Cells LaboratoryCouncil of Scientific and Industrial Research‐Indian Institute of Chemical Biology (CSIR‐IICB)KolkataIndia
| | - Subhajit Karmakar
- Division of Cancer Biology and Inflammatory DisorderSignal Transduction in Cancer and Stem Cells LaboratoryCouncil of Scientific and Industrial Research‐Indian Institute of Chemical Biology (CSIR‐IICB)KolkataIndia
| | - Malini Basu
- Department of MicrobiologyDhruba Chand Halder College, University of CalcuttaDakshin BarasatWBIndia
| | - Pratyasha Ghosh
- Department of EconomicsBethune CollegeUniversity of CalcuttaKolkataIndia
| | - Mrinal K Ghosh
- Division of Cancer Biology and Inflammatory DisorderSignal Transduction in Cancer and Stem Cells LaboratoryCouncil of Scientific and Industrial Research‐Indian Institute of Chemical Biology (CSIR‐IICB)KolkataIndia
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9
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Wang X, Zhao L, Wang C, Wang L, Wu H, Song X, Wang W, Xu H, Dong X. Potent nanoreactor-mediated ferroptosis-based strategy for the reversal of cancer chemoresistance to Sorafenib. Acta Biomater 2023; 159:237-246. [PMID: 36736851 DOI: 10.1016/j.actbio.2023.01.053] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 01/14/2023] [Accepted: 01/20/2023] [Indexed: 02/04/2023]
Abstract
The drug resistance of cancer cells is related to a variety of mechanisms, among which the destruction of redox homeostasis is one of the key factors. Ferroptosis, an intracellular iron-dependent form of cell death, is related to the production of oxidative stress. The accumulation of lipid peroxidation (LPO) during ferroptosis disrupts intracellular redox homeostasis, thereby affecting the sensitivity of tumor cells to drugs. In this work, we proposed a ferroptosis strategy based on LPO accumulation, reduced glutathione generation via inhibition of SLC3A2 protein and inactivated glutathione peroxidase 4 (GPX4) to reverse the chemoresistance of cancer cells. The Fenton reaction based on the ferroptosis-inducing nanoreactors (Au/Fe-GA/Sorafenib@PEG) not only generated hydroxyl radicals (·OH) under laser irradiation to realize the accumulation of LPO, but also depleted GSH to increase the accumulation of LPO. Meanwhile, the cystine uptake of cells was inhibited by Sorafenib, resulting in reduced GSH synthesis and inactivated GPX4. In vitro and in vivo experiments demonstrated AFG/SFB@PEG + Laser group could inactivate GPX4 and the enhanced ferroptosis can reverse chemo-resistance caused by continuous upregulation of GPX4 levels in cells through 'self-rescue'. The study proposed the mechanism and feasibility of ferroptosis to reverse drug resistance, providing a promising strategy for chemo-resistant cancer treatment. STATEMENT OF SIGNIFICANCE: Herein, we proposed a ferroptosis strategy based on LPO accumulation, reduced glutathione generation via inhibition of SLC3A2 protein, and inactivated glutathione peroxidase 4 (GPX4) to reverse chemoresistance of cancer cells. The Fenton reaction based on the ferroptosis-inducing nanoreactors (Au/Fe-GA/Sorafenib@PEG) not only generated hydroxyl radicals (·OH) under laser irradiation to realize the accumulation of LPO but also depleted GSH to increase the accumulation of LPO. Meanwhile, the cystine uptake of cells was inhibited by Sorafenib, resulting in reduced GSH synthesis and inactivated GPX4. In vitro and in vivo experiments demonstrated AFG/SFB@PEG + Laser group could inactivate GPX4 and the enhanced ferroptosis can reverse chemo-resistance caused by continuous upregulation of GPX4 levels in cells through 'self-rescue'.
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Affiliation(s)
- Xiaorui Wang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), School of Physical and Mathematical Sciences, Nanjing Tech University (NanjingTech), Nanjing 211816, China
| | - Lei Zhao
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), School of Physical and Mathematical Sciences, Nanjing Tech University (NanjingTech), Nanjing 211816, China
| | - Chenxi Wang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), School of Physical and Mathematical Sciences, Nanjing Tech University (NanjingTech), Nanjing 211816, China
| | - Leichen Wang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), School of Physical and Mathematical Sciences, Nanjing Tech University (NanjingTech), Nanjing 211816, China
| | - Haisi Wu
- Department of Pharmaceutics, School of Pharmacy, Nanjing Medical University, Nanjing 210009, China
| | - Xuejiao Song
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), School of Physical and Mathematical Sciences, Nanjing Tech University (NanjingTech), Nanjing 211816, China.
| | - Wenjun Wang
- School of Physical Science and Information Technology, Liaocheng University, Liaocheng 252059, China
| | - Huae Xu
- Department of Pharmaceutics, School of Pharmacy, Nanjing Medical University, Nanjing 210009, China.
| | - Xiaochen Dong
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), School of Physical and Mathematical Sciences, Nanjing Tech University (NanjingTech), Nanjing 211816, China; School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, China.
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10
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Cheng Z, Chu H, Zhu Q, Yang L. Ferroptosis in non-alcoholic liver disease: Molecular mechanisms and therapeutic implications. Front Nutr 2023; 10:1090338. [PMID: 36992907 PMCID: PMC10040549 DOI: 10.3389/fnut.2023.1090338] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Accepted: 02/27/2023] [Indexed: 03/16/2023] Open
Abstract
Ferroptosis refers to a novel modality of regulated cell death characterized by excessive iron accumulation and overwhelming lipid peroxidation, which takes an important part in multiple pathological processes associated with cell death. Considering the crucial roles of the liver in iron and lipid metabolism and its predisposition to oxidative insults, more and more studies have been conducted to explore the relationship between ferroptosis and various liver disorders, including non-alcoholic fatty liver disease (NAFLD). With increased morbidity and high mortality rates, NAFLD has currently emerged as a global public health issue. However, the etiology of NAFLD is not fully understood. In recent years, an accumulating body of evidence have suggested that ferroptosis plays a pivotal role in the pathogenesis of NAFLD, but the precise mechanisms underlying how ferroptosis affects NAFLD still remain obscure. Here, we summarize the molecular mechanisms of ferroptosis and its complicated regulation systems, delineate the different effects that ferroptosis exerts in different stages of NAFLD, and discuss some potential effective therapies targeting ferroptosis for NAFLD treatment, which putatively points out a novel direction for NAFLD treatment.
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Affiliation(s)
- Zilu Cheng
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Huikuan Chu
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Qingjing Zhu
- Jinyintan Hospital, Huazhong University of Science and Technology, Wuhan, China
- *Correspondence: Qingjing Zhu,
| | - Ling Yang
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
- Ling Yang, ,
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11
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Ferroptosis: mechanisms and advances in ocular diseases. Mol Cell Biochem 2023:10.1007/s11010-022-04644-5. [PMID: 36617346 DOI: 10.1007/s11010-022-04644-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 12/14/2022] [Indexed: 01/09/2023]
Abstract
As an essential trace element in the body, iron is critical for the maintenance of organismal metabolism. Excessive iron facilitates reactive oxygen species generation and inflicts damage on cells and tissues. Ferroptosis, a newly identified iron-dependent type of programmed cell death, has been implicated in a broad set of metabolic disorders. Ferroptosis is mainly characterized by excess iron accumulation, elevated lipid peroxides and reactive oxygen species, and reduced levels of glutathione and glutathione peroxidase 4. The vast emerging literature on ferroptosis has shown that numerous diseases, such as cancers, neurodegeneration, and autoimmune diseases, are associated with ferroptosis. Meanwhile, recent studies have confirmed the relationship between ferroptosis and eye diseases including keratopathy, cataract, glaucoma, retinal ischemia-reperfusion injury, age-related macular degeneration, retinitis pigmentosa, diabetic retinopathy, and retinoblastoma, indicating the critical role of ferroptosis in ocular diseases. In this article, we introduce the primary signaling pathways of ferroptosis and review current advances in research on ocular diseases involving iron overload and ferroptosis. Furthermore, several unanswered questions in the area are raised. Addressing these unanswered questions promises to provide new insights into preventing, controlling, and treating not only ocular diseases but also a variety of other diseases in the near future.
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12
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Zhang S, Sun Z, Jiang X, Lu Z, Ding L, Li C, Tian X, Wang Q. Ferroptosis increases obesity: Crosstalk between adipocytes and the neuroimmune system. Front Immunol 2022; 13:1049936. [PMID: 36479119 PMCID: PMC9720262 DOI: 10.3389/fimmu.2022.1049936] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 11/07/2022] [Indexed: 11/22/2022] Open
Abstract
Ferroptosis requires not only the accumulation of iron ions, but also changes in many ferroptosis-related regulators, including a decrease in GPX4 and inhibition of SLC7A11 for classical ferroptosis, a deletion of FSP1 or GCH1. Surprisingly, adipose tissue (AT) in the obesity conditions is also accompanied by iron buildup, decreased GSH, and increased ROS. On the neurological side, the pro-inflammatory factor released by AT may have first caused ferroptosis in the vagus nerve by inhibiting of the NRF2-GPX4 pathway, resulting in disorders of the autonomic nervous system. On the immune side, obesity may cause M2 macrophages ferroptosis due to damage to iron-rich ATMs (MFehi) and antioxidant ATMs (Mox), and lead to Treg cells ferroptosis through reductions in NRF2, GPX4, and GCH1 levels. At the same time, the reduction in GPX4 may also trigger the ferroptosis of B1 cells. In addition, some studies have also found the role of GPX4 in neutrophil autophagy, which is also worth pondering whether there is a connection with ferroptosis. In conclusion, this review summarizes the associations between neuroimmune regulation associated with obesity and ferroptosis, and on the basis of this, highlights their potential molecular mechanisms, proposing that ferroptosis in one or more cells in a multicellular tissue changes the fate of that tissue.
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Affiliation(s)
| | | | | | | | | | | | - Xuewen Tian
- *Correspondence: Xuewen Tian, ; Qinglu Wang,
| | - Qinglu Wang
- *Correspondence: Xuewen Tian, ; Qinglu Wang,
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13
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Liu X, Du S, Wang S, Ye K. Ferroptosis in osteosarcoma: A promising future. Front Oncol 2022; 12:1031779. [PMID: 36457488 PMCID: PMC9705963 DOI: 10.3389/fonc.2022.1031779] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 11/01/2022] [Indexed: 10/25/2023] Open
Abstract
The incidence of osteosarcoma (OS) is increasing year by year, and the prognosis of patients with advanced OS is extremely poor due to the tendency of recurrence and chemotherapy resistance after surgery. Ferroptosis is a novel form of programmed cell death (PCD) that kills cells through iron-dependent lipid peroxidation. Current studies have shown that ferroptosis is closely related to OS and could reduce chemotherapy resistance to a certain extent, which has great therapeutic potential. In this paper, we review the regulatory mechanism of ferroptosis and its research progress in OS, hoping to provide new help for the clinical treatment of OS.
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Affiliation(s)
- Xiang Liu
- Department of Orthopedics, Second Hospital of Lanzhou University, Lanzhou, China
- Key Laboratory of Bone and Joint Diseases of Gansu Province, Second Hospital of Lanzhou University, Lanzhou, China
| | - Shaowen Du
- Department of Orthopedics, Second Hospital of Lanzhou University, Lanzhou, China
- Key Laboratory of Bone and Joint Diseases of Gansu Province, Second Hospital of Lanzhou University, Lanzhou, China
| | - Shengdong Wang
- Department of Orthopedics, Second Hospital of Lanzhou University, Lanzhou, China
- Key Laboratory of Bone and Joint Diseases of Gansu Province, Second Hospital of Lanzhou University, Lanzhou, China
| | - Kaishan Ye
- Department of Orthopedics, Second Hospital of Lanzhou University, Lanzhou, China
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Wang W, Wang X, Cao S, Duan Y, Xu C, Gan D, He W. Dietary Antioxidant Indices in Relation to All-Cause and Cause-Specific Mortality Among Adults With Diabetes: A Prospective Cohort Study. Front Nutr 2022; 9:849727. [PMID: 35600816 PMCID: PMC9116439 DOI: 10.3389/fnut.2022.849727] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 03/30/2022] [Indexed: 11/21/2022] Open
Abstract
Background The potential beneficial effect of individual antioxidants on mortality has been reported. However, the association of overall intakes of dietary antioxidants with all-cause and cause-specific mortality among adults with diabetes remained unclear. Methods A total of 4,699 US adults with diabetes were enrolled in 2003–2014 in the National Health and Nutrition Examination Survey (NHANES) and followed for mortality until 31 December 2015. The Dietary Antioxidant Quality Score (DAQS) and the Dietary Antioxidant Index (DAI), which indicate the total antioxidant properties, were calculated based on the intakes of vitamins A, C, E, zinc, selenium, and magnesium. The Cox proportional hazards regression models were used to investigate the associations of the DAQS or the DAI with all-cause and cause-specific mortality. Results A total of 913 deaths occurred during 27,735 person-years of follow-up, including 215 deaths due to cardiovascular disease (CVD) and 173 deaths due to cancer. The higher intakes of antioxidant vitamins A, E, magnesium, and selenium were associated with lower all-cause mortality. The adjusted hazard ratios (HRs) (95% CIs) comparing the highest DAQS (5–6) to the lowest DAQS (0–2) were 0.70 (0.53–0.92) for all-cause mortality, 0.56 (0.35–0.90) for CVD mortality, and 0.59 (0.33–1.04) for cancer mortality. Consistent inverse associations were found between the DAI and mortality. Conclusion Higher intake of overall dietary antioxidants was associated with lower risk of death from all-cause and CVD in adults with diabetes. Future dietary intervention studies are needed to determine whether increasing overall antioxidant micronutrients intake could prevent premature death among adults with diabetes.
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Affiliation(s)
- Wenjie Wang
- Chronic Disease Research Institute, The Children's Hospital, and National Clinical Research Center for Child Health, School of Public Health, School of Medicine, Zhejiang University, Hangzhou, China
- Department of Nutrition and Food Hygiene, School of Public Health, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xiaoyan Wang
- Chronic Disease Research Institute, The Children's Hospital, and National Clinical Research Center for Child Health, School of Public Health, School of Medicine, Zhejiang University, Hangzhou, China
- Department of Nutrition and Food Hygiene, School of Public Health, School of Medicine, Zhejiang University, Hangzhou, China
| | - Shiling Cao
- Chronic Disease Research Institute, The Children's Hospital, and National Clinical Research Center for Child Health, School of Public Health, School of Medicine, Zhejiang University, Hangzhou, China
- Department of Nutrition and Food Hygiene, School of Public Health, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yiting Duan
- Chronic Disease Research Institute, The Children's Hospital, and National Clinical Research Center for Child Health, School of Public Health, School of Medicine, Zhejiang University, Hangzhou, China
- Department of Nutrition and Food Hygiene, School of Public Health, School of Medicine, Zhejiang University, Hangzhou, China
| | - Chengquan Xu
- Chronic Disease Research Institute, The Children's Hospital, and National Clinical Research Center for Child Health, School of Public Health, School of Medicine, Zhejiang University, Hangzhou, China
- Department of Nutrition and Food Hygiene, School of Public Health, School of Medicine, Zhejiang University, Hangzhou, China
| | - Da Gan
- Chronic Disease Research Institute, The Children's Hospital, and National Clinical Research Center for Child Health, School of Public Health, School of Medicine, Zhejiang University, Hangzhou, China
- Department of Nutrition and Food Hygiene, School of Public Health, School of Medicine, Zhejiang University, Hangzhou, China
| | - Wei He
- Chronic Disease Research Institute, The Children's Hospital, and National Clinical Research Center for Child Health, School of Public Health, School of Medicine, Zhejiang University, Hangzhou, China
- Department of Nutrition and Food Hygiene, School of Public Health, School of Medicine, Zhejiang University, Hangzhou, China
- *Correspondence: Wei He
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Zhang C, Liu X, Jin S, Chen Y, Guo R. Ferroptosis in cancer therapy: a novel approach to reversing drug resistance. Mol Cancer 2022; 21:47. [PMID: 35151318 PMCID: PMC8840702 DOI: 10.1186/s12943-022-01530-y] [Citation(s) in RCA: 389] [Impact Index Per Article: 194.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 02/05/2022] [Indexed: 12/17/2022] Open
Abstract
Ferroptosis is an intracellular iron-dependent form of cell death that is distinct from apoptosis, necrosis, and autophagy. Extensive studies suggest that ferroptosis plays a pivotal role in tumor suppression, thus providing new opportunities for cancer therapy. The development of resistance to cancer therapy remains a major challenge. A number of preclinical and clinical studies have focused on overcoming drug resistance. Intriguingly, ferroptosis has been correlated with cancer therapy resistance, and inducing ferroptosis has been demonstrated to reverse drug resistance. Herein, we provide a detailed description of the mechanisms of ferroptosis and the therapeutic role of regulating ferroptosis in reversing the resistance of cancer to common therapies, such as chemotherapy, targeted therapy and immunotherapy. We discuss the prospect and challenge of regulating ferroptosis as a therapeutic strategy for reversing cancer therapy resistance and expect that our review could provide some references for further studies.
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16
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Nishizawa H, Yamanaka M, Igarashi K. Ferroptosis: regulation by competition between NRF2 and BACH1 and propagation of the death signal. FEBS J 2022; 290:1688-1704. [PMID: 35107212 DOI: 10.1111/febs.16382] [Citation(s) in RCA: 42] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 01/25/2022] [Accepted: 01/31/2022] [Indexed: 12/15/2022]
Abstract
Ferroptosis is triggered by a chain of intracellular labile iron-dependent peroxidation of cell membrane phospholipids. Ferroptosis is important not only as a cause of ischaemic and neurodegenerative diseases but also as a mechanism of cancer suppression, and a better understanding of its regulatory mechanism is required. It has become clear that ferroptosis is finely controlled by two oxidative stress-responsive transcription factors, NRF2 (NF-E2-related factor 2) and BACH1 (BTB and CNC homology 1). NRF2 and BACH1 inhibit and promote ferroptosis, respectively, by activating or suppressing the expression of genes in the major regulatory pathways of ferroptosis: intracellular labile iron metabolism, the GSH (glutathione) -GPX4 (glutathione peroxidase 4) pathway and the FSP1 (ferroptosis suppressor protein 1)-CoQ (coenzyme Q) pathway. In addition to this, NRF2 and BACH1 control ferroptosis through the regulation of lipid metabolism and cell differentiation. This multifaceted regulation of ferroptosis by NRF2 and BACH1 is considered to have been acquired during the evolution of multicellular organisms, allowing the utilization of ferroptosis for maintaining homeostasis, including cancer suppression. In terms of cell-cell interaction, it has been revealed that ferroptosis has the property of propagating to surrounding cells along with lipid peroxidation. The regulation of ferroptosis by NRF2 and BACH1 and the propagation phenomenon could be used to realize anticancer cell therapy in the future. In this review, these points will be summarized and discussed.
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Affiliation(s)
- Hironari Nishizawa
- Department of Biochemistry, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Mie Yamanaka
- Department of Biochemistry, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kazuhiko Igarashi
- Department of Biochemistry, Tohoku University Graduate School of Medicine, Sendai, Japan.,Center for Regulatory Epigenome and Diseases, Tohoku University Graduate School of Medicine, Sendai, Japan
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Abstract
Tremendous progress has been made in the field of ferroptosis since this regulated cell death process was first named in 2012. Ferroptosis is initiated upon redox imbalance and driven by excessive phospholipid peroxidation. Levels of multiple intracellular nutrients (iron, selenium, vitamin E and coenzyme Q10) are intimately related to the cellular antioxidant system and participate in the regulation of ferroptosis. Dietary intake of monounsaturated fatty acids (MUFA) and polyunsaturated fatty acids (PUFA) regulates ferroptosis by directly modifying the fatty acid composition in cell membranes. In addition, amino acids and glucose (energy stress) manipulate the ferroptosis pathway through the nutrient-sensitive kinases mechanistic target of rapamycin complex 1 (mTORC1) and AMP-activated protein kinase (AMPK). Understanding the molecular interaction between nutrient signals and ferroptosis sensors might help in the identification of the roles of ferroptosis in normal physiology and in the development of novel pharmacological targets for the treatment of ferroptosis-related diseases.
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Jiang X, Stockwell BR, Conrad M. Ferroptosis: mechanisms, biology and role in disease. Nat Rev Mol Cell Biol 2021; 22:266-282. [PMID: 33495651 PMCID: PMC8142022 DOI: 10.1038/s41580-020-00324-8] [Citation(s) in RCA: 2255] [Impact Index Per Article: 751.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/14/2020] [Indexed: 02/06/2023]
Abstract
The research field of ferroptosis has seen exponential growth over the past few years, since the term was coined in 2012. This unique modality of cell death, driven by iron-dependent phospholipid peroxidation, is regulated by multiple cellular metabolic pathways, including redox homeostasis, iron handling, mitochondrial activity and metabolism of amino acids, lipids and sugars, in addition to various signalling pathways relevant to disease. Numerous organ injuries and degenerative pathologies are driven by ferroptosis. Intriguingly, therapy-resistant cancer cells, particularly those in the mesenchymal state and prone to metastasis, are exquisitely vulnerable to ferroptosis. As such, pharmacological modulation of ferroptosis, via both its induction and its inhibition, holds great potential for the treatment of drug-resistant cancers, ischaemic organ injuries and other degenerative diseases linked to extensive lipid peroxidation. In this Review, we provide a critical analysis of the current molecular mechanisms and regulatory networks of ferroptosis, the potential physiological functions of ferroptosis in tumour suppression and immune surveillance, and its pathological roles, together with a potential for therapeutic targeting. Importantly, as in all rapidly evolving research areas, challenges exist due to misconceptions and inappropriate experimental methods. This Review also aims to address these issues and to provide practical guidelines for enhancing reproducibility and reliability in studies of ferroptosis. Finally, we discuss important concepts and pressing questions that should be the focus of future ferroptosis research.
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Affiliation(s)
- Xuejun Jiang
- Cell Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
| | - Brent R Stockwell
- Department of Biological Sciences, Columbia University, New York, NY, USA.
- Department of Chemistry, Columbia University, New York, NY, USA.
| | - Marcus Conrad
- Institute of Metabolism and Cell Death, Helmholtz Zentrum München, Neuherberg, Germany.
- Laboratory of Experimental Oncology, Pirogov Russian National Research Medical University, Moscow, Russia.
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Cytochrome P450 oxidoreductase contributes to phospholipid peroxidation in ferroptosis. Nat Chem Biol 2020; 16:302-309. [PMID: 32080622 DOI: 10.1038/s41589-020-0472-6] [Citation(s) in RCA: 384] [Impact Index Per Article: 96.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 01/08/2020] [Indexed: 01/03/2023]
Abstract
Ferroptosis is widely involved in degenerative diseases in various tissues including kidney, liver and brain, and is a targetable vulnerability in multiple primary and therapy-resistant cancers. Accumulation of phospholipid hydroperoxides in cellular membranes is the hallmark and rate-limiting step of ferroptosis; however, the enzymes contributing to lipid peroxidation remain poorly characterized. Using genome-wide, CRISPR-Cas9-mediated suppressor screens, we identify cytochrome P450 oxidoreductase (POR) as necessary for ferroptotic cell death in cancer cells exhibiting inherent and induced susceptibility to ferroptosis. By genetic depletion of POR in cancer cells, we reveal that POR contributes to ferroptosis across a wide range of lineages and cell states, and in response to distinct mechanisms of ferroptosis induction. Using systematic lipidomic profiling, we further map POR's activity to the lipid peroxidation step in ferroptosis. Hence, our work suggests that POR is a key mediator of ferroptosis and potential druggable target for developing antiferroptosis therapeutics.
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Barbosa IG, Rocha NP, Alpak G, Vieira ELM, Huguet RB, Rocha FL, de Oliveira Diniz BS, Teixeira AL. Klotho dysfunction: A pathway linking the aging process to bipolar disorder? J Psychiatr Res 2017; 95:80-83. [PMID: 28806578 DOI: 10.1016/j.jpsychires.2017.08.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Revised: 07/26/2017] [Accepted: 08/09/2017] [Indexed: 11/16/2022]
Abstract
AIM Although accelerated aging profile has been described in bipolar disorder (BD), the biology linking BD and aging is still largely unknown. Reduced levels and/or activity of a protein named Klotho is associated with decreased life span, premature aging and occurrence of age-related diseases. Therefore, this study was designed to evaluate plasma levels of Klotho in BD patients and controls. METHODS Forty patients with type 1 BD and 30 controls were enrolled in this study. After clinical evaluation, peripheral blood samples were drawn and plasma levels of Klotho were measured using enzyme-linked immunosorbent assay. RESULTS Patients with BD and controls presented similar age and sex distribution. The mean ± SD length of illness was 24.00 ± 12.75 years. BD patients presented increased frequency of clinical comorbidities in comparison with controls, mainly arterial hypertension, diabetes mellitus, and hypothyroidism. Both patients with BD in remission and in mania exhibited increased plasma levels of Klotho in comparison with controls. There was no significant difference between patients in mania and patients in remission regarding the levels of Klotho. CONCLUSION Klotho-related pathway is altered in BD. Contrary to our original hypothesis, our sample of patients with BD presented increased plasma levels of Klotho in comparison with controls. Elevated levels of Klotho in long-term BD patients may be associated with the disorder progression. Further studies are needed to better understand the role of Klotho in BD and other mood disorders.
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Affiliation(s)
- Izabela Guimarães Barbosa
- Laboratório Interdisciplinar de Investigação Médica, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Av. Alfredo Balena, 190, Room 281, Santa Efigênia, Belo Horizonte, 30130-100, Brazil
| | - Natalia Pessoa Rocha
- Laboratório Interdisciplinar de Investigação Médica, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Av. Alfredo Balena, 190, Room 281, Santa Efigênia, Belo Horizonte, 30130-100, Brazil; Neuropsychiatry Program, Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston, 1941 East Road, Suite 3140, Houston, 77054, USA
| | - Gokay Alpak
- Neuropsychiatry Program, Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston, 1941 East Road, Suite 3140, Houston, 77054, USA
| | - Erica Leandro Marciano Vieira
- Laboratório Interdisciplinar de Investigação Médica, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Av. Alfredo Balena, 190, Room 281, Santa Efigênia, Belo Horizonte, 30130-100, Brazil
| | - Rodrigo Barreto Huguet
- Instituto de Previdência dos Servidores do Estado de Minas Gerais (IPSEMG), Alameda Ezequiel Dias, 225, Santa Efigênia, Belo Horizonte, 30130-110, Brazil
| | - Fabio Lopes Rocha
- Instituto de Previdência dos Servidores do Estado de Minas Gerais (IPSEMG), Alameda Ezequiel Dias, 225, Santa Efigênia, Belo Horizonte, 30130-110, Brazil
| | - Breno Satler de Oliveira Diniz
- Neuropsychiatry Program, Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston, 1941 East Road, Suite 3140, Houston, 77054, USA
| | - Antonio Lucio Teixeira
- Laboratório Interdisciplinar de Investigação Médica, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Av. Alfredo Balena, 190, Room 281, Santa Efigênia, Belo Horizonte, 30130-100, Brazil; Neuropsychiatry Program, Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston, 1941 East Road, Suite 3140, Houston, 77054, USA.
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Kozarski M, Klaus A, Jakovljevic D, Todorovic N, Vunduk J, Petrović P, Niksic M, Vrvic MM, van Griensven L. Antioxidants of Edible Mushrooms. Molecules 2015; 20:19489-525. [PMID: 26516828 PMCID: PMC6331815 DOI: 10.3390/molecules201019489] [Citation(s) in RCA: 157] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 10/19/2015] [Accepted: 10/21/2015] [Indexed: 12/14/2022] Open
Abstract
Oxidative stress caused by an imbalanced metabolism and an excess of reactive oxygen species (ROS) lead to a range of health disorders in humans. Our endogenous antioxidant defense mechanisms and our dietary intake of antioxidants potentially regulate our oxidative homeostasis. Numerous synthetic antioxidants can effectively improve defense mechanisms, but because of their adverse toxic effects under certain conditions, preference is given to natural compounds. Consequently, the requirements for natural, alternative sources of antioxidant foods identified in edible mushrooms, as well as the mechanistic action involved in their antioxidant properties, have increased rapidly. Chemical composition and antioxidant potential of mushrooms have been intensively studied. Edible mushrooms might be used directly in enhancement of antioxidant defenses through dietary supplementation to reduce the level of oxidative stress. Wild or cultivated, they have been related to significant antioxidant properties due to their bioactive compounds, such as polyphenols, polysaccharides, vitamins, carotenoids and minerals. Antioxidant and health benefits, observed in edible mushrooms, seem an additional reason for their traditional use as a popular delicacy food. This review discusses the consumption of edible mushrooms as a powerful instrument in maintaining health, longevity and life quality.
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Affiliation(s)
- Maja Kozarski
- Department for Chemistry and Biochemistry, Faculty of Agriculture, University of Belgrade, Nemanjina 6, Belgrade 11080, Serbia.
| | - Anita Klaus
- Department for Industrial Microbiology, Faculty of Agriculture, University of Belgrade, Nemanjina 6, Belgrade 11080, Serbia.
| | - Dragica Jakovljevic
- Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoseva 12, Belgrade 11001, Serbia.
| | - Nina Todorovic
- Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoseva 12, Belgrade 11001, Serbia.
| | - Jovana Vunduk
- Department for Industrial Microbiology, Faculty of Agriculture, University of Belgrade, Nemanjina 6, Belgrade 11080, Serbia.
| | - Predrag Petrović
- Institute of Chemical Engineering, Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, Belgrade 11060, Serbia.
| | - Miomir Niksic
- Department for Industrial Microbiology, Faculty of Agriculture, University of Belgrade, Nemanjina 6, Belgrade 11080, Serbia.
| | - Miroslav M Vrvic
- Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoseva 12, Belgrade 11001, Serbia.
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade 11000, Serbia.
| | - Leo van Griensven
- Plant Research International, Wageningen University and Research Centre, Droevendaalsesteeg 1, Wageningen 6700 AA, The Netherlands.
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Prasad C, Imrhan V, Marotta F, Juma S, Vijayagopal P. Lifestyle and Advanced Glycation End Products (AGEs) Burden: Its Relevance to Healthy Aging. Aging Dis 2014; 5:212-7. [PMID: 24900944 PMCID: PMC4037313 DOI: 10.14336/ad.2014.0500212] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 10/22/2013] [Accepted: 11/10/2013] [Indexed: 02/05/2023] Open
Abstract
Uncontrolled continued exposure to oxidative stress is a precursor to many chronic diseases including cancer, diabetes, degenerative disorders and cardiovascular diseases. Of the many known mediators of oxidative stress, reactive oxygen species (ROS) and advanced glycation end products (AGEs) are the most studied. In the present review, we have summarized current data on the origin of circulating AGEs, discussed issues associated with reliable assessment of its steady state level, and changes in its level with age and select metabolic diseases. Lastly, we have made recommendations about life style changes that may decrease AGEs burden to promote healthy aging.
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Affiliation(s)
- Chandan Prasad
- Department of Nutrition and Food Sciences, Texas Woman’s University, Denton, Texas, USA
- Correspondence should be addressed to: Professor Chandan Prasad, PhD, Department of Nutrition and Food Sciences, Texas Woman’s University, Denton, Texas, USA. E-mail:
| | - Victorine Imrhan
- Department of Nutrition and Food Sciences, Texas Woman’s University, Denton, Texas, USA
| | | | - Shanil Juma
- Department of Nutrition and Food Sciences, Texas Woman’s University, Denton, Texas, USA
| | - Parakat Vijayagopal
- Department of Nutrition and Food Sciences, Texas Woman’s University, Denton, Texas, USA
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23
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Pandya CD, Howell KR, Pillai A. Antioxidants as potential therapeutics for neuropsychiatric disorders. Prog Neuropsychopharmacol Biol Psychiatry 2013; 46:214-23. [PMID: 23123357 PMCID: PMC3615047 DOI: 10.1016/j.pnpbp.2012.10.017] [Citation(s) in RCA: 152] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2012] [Revised: 10/24/2012] [Accepted: 10/24/2012] [Indexed: 12/25/2022]
Abstract
Oxidative stress has been implicated in the pathophysiology of many neuropsychiatric disorders such as schizophrenia, bipolar disorder, major depression etc. Both genetic and non-genetic factors have been found to cause increased cellular levels of reactive oxygen species beyond the capacity of antioxidant defense mechanism in patients of psychiatric disorders. These factors trigger oxidative cellular damage to lipids, proteins and DNA, leading to abnormal neural growth and differentiation. Therefore, novel therapeutic strategies such as supplementation with antioxidants can be effective for long-term treatment management of neuropsychiatric disorders. The use of antioxidants and PUFAs as supplements in the treatment of neuropsychiatric disorders has provided some promising results. At the same time, one should be cautious with the use of antioxidants since excessive antioxidants could dangerously interfere with some of the protective functions of reactive oxygen species. The present article will give an overview of the potential strategies and outcomes of using antioxidants as therapeutics in psychiatric disorders.
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Affiliation(s)
- Chirayu D Pandya
- Department of Psychiatry and Health Behavior, Medical College of Georgia, Georgia Health Sciences University, Augusta, GA, USA
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24
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Jang H, Ha US, Kim SJ, Yoon BI, Han DS, Yuk SM, Kim SW. Anthocyanin extracted from black soybean reduces prostate weight and promotes apoptosis in the prostatic hyperplasia-induced rat model. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:12686-91. [PMID: 21121678 DOI: 10.1021/jf102688g] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Anthocyanin is a natural plant pigment and potent antioxidant. This study was designed to investigate the effects of anthocyanin extracted from black soybeans on a rat model of benign prostatic hyperplasia (BPH), a disease associated with the geriatric population. Thirty male rats were divided into five experimental groups: a control group, a BPH-induced group, and three BPH-induced groups that received oral doses of anthocyanin (40, 80, and 160 mg/kg). Prostate hyperplasia was induced by the administration of testosterone propionate for 4 weeks. Following BPH induction, the anthocyanin-treated groups received the compound for 4 weeks. After anthocyanin treatment, the prostates from the rats in all groups were removed, weighed, and subjected to histological examination. Apoptosis in the prostates was measured by the TUNEL assay. The mean prostate weight for the control animals was 674.17 ± 28.24 mg, whereas the BPH-induced rats had a mean prostate weight of 1098.33 ± 131.31 mg. The mean prostate weights for the rats receiving 40, 80, and 160 mg/kg anthocyanin were 323.00 ± 22.41, 324.00 ± 26.80, and 617.50 ± 31.08 mg, respectively. The average prostate weight in the BPH-induced group was significantly higher than in the control group (p < 0.05), whereas the prostate weights in the anthocyanin-administered groups were significantly lower than in the BPH-induced group (p < 0.05). Injected testosterone led to prostatic hyperplasia as observed histologically, but anthocyanin administration helped to prevent this change. Apoptotic body counts were significantly higher in groups receiving anthocyanin than in the BPH-induced group (p < 0.05). These results suggest that anthocyanin may be effective in decreasing the volume and suppressing the proliferation of the prostate. Further studies are needed to better understand the mechanisms and actions of anthocyanin, and these studies may lead to the clinical application of anthocyanin in treating BPH.
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Affiliation(s)
- Hoon Jang
- Department of Urology, The Catholic University of Korea College of Medicine, Seoul, Korea
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25
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Cheng Z, Li Y. What is responsible for the initiating chemistry of iron-mediated lipid peroxidation: an update. Chem Rev 2007; 107:748-66. [PMID: 17326688 DOI: 10.1021/cr040077w] [Citation(s) in RCA: 139] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Zhiyong Cheng
- The Key Laboratory of Bioorganic & Molecular Engineering, College of Chemistry & Molecular Engineering, Peking University, Beijing, China 100871
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26
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Khattak AB, Zeb A, Khan M, Bibi N, Ihsanullah, Khattak MS. Influence of germination techniques on sprout yield, biosynthesis of ascorbic acid and cooking ability, in chickpea (Cicer arietinum L.). Food Chem 2007. [DOI: 10.1016/j.foodchem.2006.08.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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Milczarek R, Sokolowska E, Hallmann A, Klimek J. The NADPH- and iron-dependent lipid peroxidation in human placental microsomes. Mol Cell Biochem 2006; 295:105-11. [PMID: 16896536 DOI: 10.1007/s11010-006-9279-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2006] [Accepted: 07/10/2006] [Indexed: 01/12/2023]
Abstract
In pregnant females, placenta is the most important source of lipid hydroperoxides and other reactive oxygen species (ROS). The increased production of lipid peroxides is often linked to preeclampsia. In our study, we revealed that NADPH- and iron-dependent lipid peroxidation in human placental microsomes (HPM) occurred. In the presence of Fe2+ ion, HPM produced small amounts of thiobarbituric acid-reactive substances (TBARS) - a final product of lipid peroxidation. NADPH caused a strong increase of iron stimulated TBARS formation. TBARS formation was inhibited by superoxide dismutase, butylated hydroxytoluene and alpha-tocopherol but not by mannitol or catalase. TBARS and superoxide radical production was inhibited in similar manner by cytochrome P450 inhibitors. The results obtained led us to the following conclusions: (1) microsomal lipid peroxidation next to mitochondrial lipid peroxidation may by an important source of lipid hydroperoxides in blood during pregnancy and (2) superoxide radical released by microsomal cytochrome P450 is an important factor in NADPH- and iron-dependent lipid peroxidation in HPM.
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Affiliation(s)
- Ryszard Milczarek
- Department of Pharmaceutical Biochemistry, Medical University of Gdańsk, ul. Debinki 1, 80-211, Gdańsk, Poland.
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28
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Hellstrom HR. Can the premises of the altered homeostatic theory permit improvement in the prevention of ischemic heart disease? Med Hypotheses 2003; 60:12-25. [PMID: 12450764 DOI: 10.1016/s0306-9877(02)00328-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
In this communication, the altered homeostatic theory will be discussed and updated, and evidence will be presented that the premises of the theory might permit improvement of the prevention of ischemic heart disease (IHD). This hypothesis, first described in 1999, argues that IHD is due basically to an inappropriate shift of homeostasis, and the theory includes the position that S-RV directly induces symptoms. In contrast, the standard approach to IHD is based fundamentally on two principles: that atherosclerosis is due fundamentally to lipid abnormalities, and that symptoms in IHD are due to obstructive complications of atherosclerosis in epicardial coronary arteries. Suggestions for prevention stem from the altered homeostatic theory's different basic conceptualization of this disorder, and it seems reasonable that accepted basic pathogenetic mechanisms help shape measures to prevent IHD. Many of the theory's positions for preventing IHD parallel standard views, but the theory's basic premises have resulted in significant differences between the standard and the theory's overall approach to the prevention of IHD. Positions for the prevention of IHD include: the possibility that any preventative factor can improve any risk factor, the use of substitute preventative factors to counter unmodifiable or difficult to correct risk factors, underestimation of the risk of IHD by the standard position in individuals with normal lipid levels but multiple other risk factors, the probable relative overemphasis of the risk factor of cholesterol, the value of a national program to reduce the incidence of multiple disorders with similar risk factors, an alternate approach to the use of statins, and the value of an evolutionary approach to preventing IHD and other disorders.
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Affiliation(s)
- H R Hellstrom
- College of Medicine, SUNY Upstate Medical University, Syracuse, New York 13210, USA.
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29
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McNeish AJ, Wilson WS, Martin W. Ascorbate blocks endothelium-derived hyperpolarizing factor (EDHF)-mediated vasodilatation in the bovine ciliary vascular bed and rat mesentery. Br J Pharmacol 2002; 135:1801-9. [PMID: 11934822 PMCID: PMC1573289 DOI: 10.1038/sj.bjp.0704623] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
1. The effects of ascorbate were assessed on vasodilatation mediated by endothelium-derived hyperpolarizing factor (EDHF) in the ciliary vascular bed of the bovine isolated perfused eye and in the rat isolated perfused mesenteric arterial bed. 2. In the bovine eye, EDHF-mediated vasodilator responses induced by acetylcholine or bradykinin were powerfully blocked when ascorbate (50 microM) was included in the perfusion medium for at least 120 min; with acetylcholine a normally-masked muscarinic vasoconstrictor response was also uncovered. 3. The blockade of EDHF-mediated vasodilatation by ascorbate was time-dependent (maximum blockade at 120 min) and concentration-dependent (10 - 150 microM). 4. Ascorbate (50 microM) also blocked acetylcholine-induced, EDHF-mediated vasodilator responses in the rat mesenteric arterial bed in a time-dependent manner (maximum blockade at 180 min). 5. The ability of ascorbate to block EDHF-mediated vasodilatation is likely to result from its reducing properties, since this action was mimicked in the bovine eye by two other reducing agents, namely, N-acetyl-L-cysteine (1 mM) and dithiothreitol (100 microM), but not by the redox-inactive analogue, dehydroascorbate (50 microM). 6. In conclusion, concentrations of ascorbate present in normal plasma block EDHF-mediated vasodilator responses in the bovine eye and rat mesentery. The mechanism and physiological consequences of this blockade remain to be determined.
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Affiliation(s)
- Alister J McNeish
- Division of Neuroscience & Biomedical Systems, Institute of Biomedical & Life Sciences, West Medical Building, University of Glasgow, Glasgow G12 8QQ
| | - William S Wilson
- Division of Neuroscience & Biomedical Systems, Institute of Biomedical & Life Sciences, West Medical Building, University of Glasgow, Glasgow G12 8QQ
| | - William Martin
- Division of Neuroscience & Biomedical Systems, Institute of Biomedical & Life Sciences, West Medical Building, University of Glasgow, Glasgow G12 8QQ
- Author for correspondence:
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Salganik RI. The benefits and hazards of antioxidants: controlling apoptosis and other protective mechanisms in cancer patients and the human population. J Am Coll Nutr 2001; 20:464S-472S; discussion 473S-475S. [PMID: 11603657 DOI: 10.1080/07315724.2001.10719185] [Citation(s) in RCA: 250] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Cellular oxidants, called reactive oxygen species (ROS), are constantly produced in animal and human cells. Excessive ROS can induce oxidative damage in cell constituents and promote a number of degenerative diseases and aging. Cellular antioxidants protect against the damaging effects of ROS. However, in moderate concentrations, ROS are necessary for a number of protective reactions. Thus, ROS are essential mediators of antimicrobial phagocytosis, detoxification reactions carried out by the cytochrome P-450 complex, and apoptosis which eliminates cancerous and other life-threatening cells. Excessive antioxidants could dangerously interfere with these protective functions, while temporary depletion of antioxidants can enhance anti-cancer effects of apoptosis. Experimental data are presented supporting these notions. The human population is heterogeneous regarding ROS levels. Intake of exogenous antioxidants (vitamins E, C, beta-carotene and others) could protect against cancer and other degenerative diseases in people with innate or acquired high levels of ROS. However, abundant antioxidants might suppress these protective functions, particularly in people with a low innate baseline level of ROS. Screening human populations for ROS levels could help identify groups with a high level of ROS that are at a risk of developing cancer and other degenerative diseases. It also could identify groups with a low level of ROS that are at a risk of down-regulating ROS-dependent anti-cancer and other protective reactions. Screening populations could provide a scientifically grounded application of antioxidant supplements, which could significantly contribute to the nation's health.
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Affiliation(s)
- R I Salganik
- Department of Nutrition, School of Public Health, University of North Carolina, Chapel Hill 27599, USA.
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Abstract
Most species of plants and animals synthesize ascorbic acid, but human subjects cannot, making vitamin C an essential component of our diet. Relationships between vitamin C intake and status, and between status and health are not yet clear. There is evidence, however, that higher intake of vitamin C is associated with lower risk of disease, supporting the concept that optimal intake is needed for optimal vitamin C status, and that both factors are required for optimal health. Vitamin C has low toxicity in healthy subjects, but a clear definition of optimal status and the dietary intake required to meet and maintain this status is needed before a change in the current recommended intake can be considered. Available evidence suggests that intake of 200 mg vitamin C/d saturates tissues and maintains fasting plasma levels above the proposed threshold (50 mumol/l) for minimum risk of CHD. However, the issue of whether or not these levels produce 'optimal vitamin C status' awaits the clear and accepted definition of the term. This definition in turn awaits the development of reliable functional markers capable of assessing the effects of varying levels of vitamin C nutriture. In the present paper the relationship between intake and body stores of vitamin C and the role of vitamin C in human health are reviewed briefly. The requirements of a reliable functional marker of human vitamin C status are defined, three classes of functional markers (molecular, biochemical and physiological) are described, and possible candidate markers are examined.
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Affiliation(s)
- I F Benzie
- Department of Nursing & Health Sciences, Hong Kong Polytechnic University, Kowloon, SAR, China.
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