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An X, Yu W, Liu J, Tang D, Yang L, Chen X. Oxidative cell death in cancer: mechanisms and therapeutic opportunities. Cell Death Dis 2024; 15:556. [PMID: 39090114 PMCID: PMC11294602 DOI: 10.1038/s41419-024-06939-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 07/19/2024] [Accepted: 07/22/2024] [Indexed: 08/04/2024]
Abstract
Reactive oxygen species (ROS) are highly reactive oxygen-containing molecules generated as natural byproducts during cellular processes, including metabolism. Under normal conditions, ROS play crucial roles in diverse cellular functions, including cell signaling and immune responses. However, a disturbance in the balance between ROS production and cellular antioxidant defenses can lead to an excessive ROS buildup, causing oxidative stress. This stress damages essential cellular components, including lipids, proteins, and DNA, potentially culminating in oxidative cell death. This form of cell death can take various forms, such as ferroptosis, apoptosis, necroptosis, pyroptosis, paraptosis, parthanatos, and oxeiptosis, each displaying distinct genetic, biochemical, and signaling characteristics. The investigation of oxidative cell death holds promise for the development of pharmacological agents that are used to prevent tumorigenesis or treat established cancer. Specifically, targeting key antioxidant proteins, such as SLC7A11, GCLC, GPX4, TXN, and TXNRD, represents an emerging approach for inducing oxidative cell death in cancer cells. This review provides a comprehensive summary of recent progress, opportunities, and challenges in targeting oxidative cell death for cancer therapy.
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Affiliation(s)
- Xiaoqin An
- Department of Physiology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, Guizhou, PR China
- Provincial Key Laboratory of Medical Molecular Biology, Guizhou Medical University, Guiyang, Guizhou, PR China
- Key Laboratory of Biological Targeting Diagnosis, Therapy and Rehabilitation of Guangdong Higher Education Institutes, The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong, PR China
| | - Wenfeng Yu
- Provincial Key Laboratory of Medical Molecular Biology, Guizhou Medical University, Guiyang, Guizhou, PR China
| | - Jinbao Liu
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation, State Key Laboratory of Respiratory Disease, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, Guangdong, PR China
| | - Daolin Tang
- Department of Surgery, UT Southwestern Medical Center, Dallas, TX, USA.
| | - Li Yang
- Department of Physiology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, Guizhou, PR China.
| | - Xin Chen
- Key Laboratory of Biological Targeting Diagnosis, Therapy and Rehabilitation of Guangdong Higher Education Institutes, The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong, PR China.
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation, State Key Laboratory of Respiratory Disease, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, Guangdong, PR China.
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Barriuso D, Alvarez-Frutos L, Gonzalez-Gutierrez L, Motiño O, Kroemer G, Palacios-Ramirez R, Senovilla L. Involvement of Bcl-2 Family Proteins in Tetraploidization-Related Senescence. Int J Mol Sci 2023; 24:ijms24076374. [PMID: 37047342 PMCID: PMC10094710 DOI: 10.3390/ijms24076374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 03/21/2023] [Accepted: 03/24/2023] [Indexed: 03/30/2023] Open
Abstract
The B-cell lymphoma 2 (Bcl-2) family of proteins is the main regulator of apoptosis. However, multiple emerging evidence has revealed that Bcl-2 family proteins are also involved in cellular senescence. On the one hand, the different expression of these proteins determines the entry into senescence. On the other hand, entry into senescence modulates the expression of these proteins, generally conferring resistance to apoptosis. With some exceptions, senescent cells are characterized by the upregulation of antiapoptotic proteins and downregulation of proapoptotic proteins. Under physiological conditions, freshly formed tetraploid cells die by apoptosis due to the tetraploidy checkpoint. However, suppression of Bcl-2 associated x protein (Bax), as well as overexpression of Bcl-2, favors the appearance and survival of tetraploid cells. Furthermore, it is noteworthy that our laboratory has shown that the joint absence of Bax and Bcl-2 antagonist/killer (Bak) favors the entry into senescence of tetraploid cells. Certain microtubule inhibitory chemotherapies, such as taxanes and vinca alkaloids, induce the generation of tetraploid cells. Moreover, the combined use of inhibitors of antiapoptotic proteins of the Bcl-2 family with microtubule inhibitors increases their efficacy. In this review, we aim to shed light on the involvement of the Bcl-2 family of proteins in the senescence program activated after tetraploidization and the possibility of using this knowledge to create a new therapeutic strategy targeting cancer cells.
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3
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Sancho M, Leiva D, Lucendo E, Orzáez M. Understanding MCL1: from cellular function and regulation to pharmacological inhibition. FEBS J 2022; 289:6209-6234. [PMID: 34310025 PMCID: PMC9787394 DOI: 10.1111/febs.16136] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 07/09/2021] [Accepted: 07/22/2021] [Indexed: 12/30/2022]
Abstract
Myeloid cell leukemia-1 (MCL1), an antiapoptotic member of the BCL2 family characterized by a short half-life, functions as a rapid sensor that regulates cell death and other relevant processes that include cell cycle progression and mitochondrial homeostasis. In cancer, MCL1 overexpression contributes to cell survival and resistance to diverse chemotherapeutic agents; for this reason, several MCL1 inhibitors are currently under preclinical and clinical development for cancer treatment. However, the nonapoptotic functions of MCL1 may influence their therapeutic potential. Overall, the complexity of MCL1 regulation and function represent challenges to the clinical application of MCL1 inhibitors. We now summarize the current knowledge regarding MCL1 structure, regulation, and function that could impact the clinical success of MCL1 inhibitors.
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Affiliation(s)
- Mónica Sancho
- Targeted Therapies on Cancer and Inflammation LaboratoryCentro de Investigación Príncipe FelipeValenciaSpain
| | - Diego Leiva
- Targeted Therapies on Cancer and Inflammation LaboratoryCentro de Investigación Príncipe FelipeValenciaSpain
| | - Estefanía Lucendo
- Targeted Therapies on Cancer and Inflammation LaboratoryCentro de Investigación Príncipe FelipeValenciaSpain
| | - Mar Orzáez
- Targeted Therapies on Cancer and Inflammation LaboratoryCentro de Investigación Príncipe FelipeValenciaSpain
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4
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Tang Y, Zhang Z, Chen Y, Qin S, Zhou L, Gao W, Shen Z. Metabolic Adaptation-Mediated Cancer Survival and Progression in Oxidative Stress. Antioxidants (Basel) 2022; 11:antiox11071324. [PMID: 35883815 PMCID: PMC9311581 DOI: 10.3390/antiox11071324] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 06/27/2022] [Accepted: 06/28/2022] [Indexed: 02/05/2023] Open
Abstract
Undue elevation of ROS levels commonly occurs during cancer evolution as a result of various antitumor therapeutics and/or endogenous immune response. Overwhelming ROS levels induced cancer cell death through the dysregulation of ROS-sensitive glycolytic enzymes, leading to the catastrophic depression of glycolysis and oxidative phosphorylation (OXPHOS), which are critical for cancer survival and progression. However, cancer cells also adapt to such catastrophic oxidative and metabolic stresses by metabolic reprograming, resulting in cancer residuality, progression, and relapse. This adaptation is highly dependent on NADPH and GSH syntheses for ROS scavenging and the upregulation of lipolysis and glutaminolysis, which fuel tricarboxylic acid cycle-coupled OXPHOS and biosynthesis. The underlying mechanism remains poorly understood, thus presenting a promising field with opportunities to manipulate metabolic adaptations for cancer prevention and therapy. In this review, we provide a summary of the mechanisms of metabolic regulation in the adaptation of cancer cells to oxidative stress and the current understanding of its regulatory role in cancer survival and progression.
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Affiliation(s)
- Yongquan Tang
- Department of Pediatric Surgery, West China Hospital, Sichuan University, Chengdu 610041, China;
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu 610041, China; (Z.Z.); (Y.C.); (S.Q.); (L.Z.)
| | - Zhe Zhang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu 610041, China; (Z.Z.); (Y.C.); (S.Q.); (L.Z.)
| | - Yan Chen
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu 610041, China; (Z.Z.); (Y.C.); (S.Q.); (L.Z.)
| | - Siyuan Qin
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu 610041, China; (Z.Z.); (Y.C.); (S.Q.); (L.Z.)
| | - Li Zhou
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu 610041, China; (Z.Z.); (Y.C.); (S.Q.); (L.Z.)
| | - Wei Gao
- Clinical Medical College & Affiliated Hospital of Chengdu University, Chengdu University, Chengdu 610106, China
- Correspondence: (W.G.); (Z.S.)
| | - Zhisen Shen
- Department of Otorhinolaryngology and Head and Neck Surgery, The Affiliated Lihuili Hospital, Ningbo University, Ningbo 315040, China
- Correspondence: (W.G.); (Z.S.)
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miR-340-5p Mediates Cardiomyocyte Oxidative Stress in Diabetes-Induced Cardiac Dysfunction by Targeting Mcl-1. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:3182931. [PMID: 35126811 PMCID: PMC8813269 DOI: 10.1155/2022/3182931] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 01/04/2022] [Accepted: 01/11/2022] [Indexed: 12/13/2022]
Abstract
Diabetic cardiomyopathy (DCM) is initially characterized by early diastolic dysfunction, left ventricular remodeling, hypertrophy, and myocardial fibrosis, and it is eventually characterized by clinical heart failure. MicroRNAs (miRNAs), endogenous small noncoding RNAs, play significant roles in diabetes mellitus (DM). However, it is still largely unknown about the mechanism that links miRNAs and the development of DCM. Here, we aimed to elucidate the mechanism underlying the potential role of microRNA-340-5p in DCM in db/db mouse, which is a commonly used model of type 2 DM and diabetic complications that lead to heart failure. We first demonstrated that miR-340-5p expression was dramatically increased in heart tissues of mice and cardiomyocytes under diabetic conditions. Overexpression of miR-340-5p exacerbated DCM, which was reflected by extensive myocardial fibrosis and more serious dysfunction in db/db mice as represented by increased apoptotic cardiomyocytes, elevated ROS production, and impaired mitochondrial function. Inhibition of miR-340-5p by a tough decoy (TUD) vector was beneficial for preventing ROS production and apoptosis, thus rescuing diabetic cardiomyopathy. We identified myeloid cell leukemia 1 (Mcl-1) as a major target gene for miR-340-5p and showed that the inhibition of Mcl-1 was responsible for increased functional loss of mitochondria, oxidative stress, and cardiomyocyte apoptosis, thereby caused cardiac dysfunction in diabetic mice. In conclusion, our results showed that miR-340-5p plays a crucial role in the development of DCM and can be targeted for therapeutic intervention.
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Fu D, Pfannenstiel L, Demelash A, Phoon YP, Mayell C, Cabrera C, Liu C, Zhao J, Dermawan J, Patil D, DeVecchio J, Kalady M, Souers AJ, Phillips DC, Li X, Gastman B. MCL1 nuclear translocation induces chemoresistance in colorectal carcinoma. Cell Death Dis 2022; 13:63. [PMID: 35042842 PMCID: PMC8766550 DOI: 10.1038/s41419-021-04334-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 09/21/2021] [Accepted: 10/19/2021] [Indexed: 11/09/2022]
Abstract
AbstractColorectal cancer (CRC) is one of the most common and deadliest forms of cancer. Myeloid Cell Leukemia 1 (MCL1), a pro-survival member of the Bcl-2 protein family is associated with chemo-resistance in CRC. The ability of MCL1 to inhibit apoptosis by binding to the BH3 domains of pro-apoptotic Bcl-2 family members is a well-studied means by which this protein confers resistance to multiple anti-cancer therapies. We found that specific DNA damaging chemotherapies promote nuclear MCL1 translocation in CRC models. In p53null CRC, this process is associated with resistance to chemotherapeutic agents, the mechanism of which is distinct from the classical mitochondrial protection. We previously reported that MCL1 has a noncanonical chemoresistance capability, which requires a novel loop domain that is distinct from the BH3-binding domain associated with anti-apoptotic function. Herein we disclose that upon treatment with specific DNA-damaging chemotherapy, this loop domain binds directly to alpha-enolase which in turn binds to calmodulin; we further show these protein−protein interactions are critical in MCL1’s nuclear import and chemoresistance. We additionally observed that in chemotherapy-treated p53−/− CRC models, MCL1 nuclear translocation confers sensitivity to Bcl-xL inhibitors, which has significant translational relevance given the co-expression of these proteins in CRC patient samples. Together these findings indicate that chemotherapy-induced MCL1 translocation represents a novel resistance mechanism in CRC, while also exposing an inherent and targetable Bcl-xL co-dependency in these cancers. The combination of chemotherapy and Bcl-xL inhibitors may thus represent a rational means of treating p53−/− CRC via exploitation of this unique MCL1-based chemoresistance mechanism.
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7
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Campbell KJ, Mason SM, Winder ML, Willemsen RBE, Cloix C, Lawson H, Rooney N, Dhayade S, Sims AH, Blyth K, Tait SWG. Breast cancer dependence on MCL-1 is due to its canonical anti-apoptotic function. Cell Death Differ 2021; 28:2589-2600. [PMID: 33785871 PMCID: PMC8408186 DOI: 10.1038/s41418-021-00773-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 03/03/2021] [Accepted: 03/04/2021] [Indexed: 02/01/2023] Open
Abstract
High levels of the anti-apoptotic BCL-2 family member MCL-1 are frequently found in breast cancer and, appropriately, BH3-mimetic drugs that specifically target MCL-1's function in apoptosis are in development as anti-cancer therapy. MCL-1 also has reported non-canonical roles that may be relevant in its tumour-promoting effect. Here we investigate the role of MCL-1 in clinically relevant breast cancer models and address whether the canonical role of MCL-1 in apoptosis, which can be targeted using BH3-mimetic drugs, is the major function for MCL-1 in breast cancer. We show that MCL-1 is essential in established tumours with genetic deletion inducing tumour regression and inhibition with the MCL-1-specific BH3-mimetic drug S63845 significantly impeding tumour growth. Importantly, we found that the anti-tumour functions achieved by MCL-1 deletion or inhibition were completely dependent on pro-apoptotic BAX/BAK. Interestingly, we find that MCL-1 is also critical for stem cell activity in human breast cancer cells and high MCL1 expression correlates with stemness markers in tumours. This strongly supports the idea that the key function of MCL-1 in breast cancer is through its anti-apoptotic function. This has important implications for the future use of MCL-1-specific BH3-mimetic drugs in breast cancer treatment.
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Affiliation(s)
- Kirsteen J Campbell
- CRUK Beatson Institute, Glasgow, UK.
- Institute of Cancer Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK.
| | | | - Matthew L Winder
- CRUK Beatson Institute, Glasgow, UK
- Institute of Cancer Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Rosalie B E Willemsen
- CRUK Beatson Institute, Glasgow, UK
- Institute of Cancer Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Catherine Cloix
- CRUK Beatson Institute, Glasgow, UK
- Institute of Cancer Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Hannah Lawson
- CRUK Beatson Institute, Glasgow, UK
- Barts Cancer Institute, Queen Mary University of London, London, UK
| | | | | | - Andrew H Sims
- CRUK Edinburgh Centre, MRC Institute of Genetics and Molecular Medicine, Edinburgh, UK
| | - Karen Blyth
- CRUK Beatson Institute, Glasgow, UK
- Institute of Cancer Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Stephen W G Tait
- CRUK Beatson Institute, Glasgow, UK.
- Institute of Cancer Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK.
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8
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Kazantseva L, Becerra J, Santos-Ruiz L. Oridonin enhances antitumor effects of doxorubicin in human osteosarcoma cells. Pharmacol Rep 2021; 74:248-256. [PMID: 34427908 PMCID: PMC8786785 DOI: 10.1007/s43440-021-00324-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 08/13/2021] [Accepted: 08/17/2021] [Indexed: 11/28/2022]
Abstract
Background Doxorubicin is the chemotherapeutic drug of choice in osteosarcoma treatment, but its cumulative administration causes dilated cardiomyopathy. Combination therapy represents a potential strategy to reduce the therapeutic dosage of the chemotherapeutic agent and minimize its side effects. The aim of this study was to evaluate the potential of oridonin, a natural product from the medicinal herb Rabdosia rubescens, to act in combination with doxorubicin for osteosarcoma treatment. To date, there are no reports of the simultaneous administration of both drugs in osteosarcoma therapy. Methods The combined administration of different doses of oridonin and doxorubicin, as compared with the drugs alone, were tested in an in vitro model of osteosarcoma. The synergistic effect of the drugs on cell death was assessed by alamarBlue™ and by CompuSyn software. Early and late apoptosis markers (JC-1 fluorescence and Annexin V immunofluorescence), as well as the production of reactive oxygen species, were evaluated by flow cytometry. Western blot was used to assess the expression of anti-apoptotic proteins. Results Oridonin and doxorubicin presented a synergistic cytotoxic effect in osteosarcoma cells. In the presence of sub-cytotoxic concentrations of the natural product, there was an increased accumulation of intracellular doxorubicin, increased levels of reactive oxygen species (ROS), alteration of mitochondria membrane potential and a higher rate of apoptosis. Conclusion The combined use of oridonin and doxorubicin could help to reduce the clinical dosage of doxorubicin and its dangerous side effects.
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Affiliation(s)
- Liliya Kazantseva
- Andalusian Centre for Nanomedicine and Biotechnology-BIONAND, Universidad de Málaga, Parque Tecnológico de Andalucía, C/ Severo Ochoa, 35, 29590, Campanillas Málaga, Spain.,Centro de Investigación Biomédica en Red, Biotecnología, Biomateriales y Nanomedicina (CIBER-BBN), Madrid, Spain.,Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain
| | - José Becerra
- Andalusian Centre for Nanomedicine and Biotechnology-BIONAND, Universidad de Málaga, Parque Tecnológico de Andalucía, C/ Severo Ochoa, 35, 29590, Campanillas Málaga, Spain.,Centro de Investigación Biomédica en Red, Biotecnología, Biomateriales y Nanomedicina (CIBER-BBN), Madrid, Spain.,Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain.,Departamento de Biología Celular, Genética y Fisiología Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071, Málaga, Spain
| | - Leonor Santos-Ruiz
- Andalusian Centre for Nanomedicine and Biotechnology-BIONAND, Universidad de Málaga, Parque Tecnológico de Andalucía, C/ Severo Ochoa, 35, 29590, Campanillas Málaga, Spain. .,Centro de Investigación Biomédica en Red, Biotecnología, Biomateriales y Nanomedicina (CIBER-BBN), Madrid, Spain. .,Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain. .,Departamento de Biología Celular, Genética y Fisiología Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071, Málaga, Spain.
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Prašnikar E, Borišek J, Perdih A. Senescent cells as promising targets to tackle age-related diseases. Ageing Res Rev 2021; 66:101251. [PMID: 33385543 DOI: 10.1016/j.arr.2020.101251] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 11/30/2020] [Accepted: 12/22/2020] [Indexed: 12/12/2022]
Abstract
As the world's population progressively ages, the burden on the socio-economic and health systems is escalating, demanding sustainable and lasting solutions. Cellular senescence, one of the hallmarks of ageing, is a state of irreversible cell cycle arrest that occurs in response to various genotoxic stressors and is considered an important factor in the development of many age-related diseases and therefore a potential therapeutic target. Here, the role of senescent cells in age-related diseases is discussed, focusing on their formation and main characteristics. The mechanisms leading to senescent cells are presented, including replicative and premature senescence as well as senescence that occurs in various physiological processes, such as wound healing. The second part comprises a comprehensive description of various biomarkers currently used for the detection of senescent cells along with the investigated therapeutic approaches, namely senolytics, senomorphics and the clearance of senescent cells by the immune system. Potential delivery systems suitable for such therapies and model organisms to study senescence are also briefly examined. This in-depth overview of cellular senescence contributes to a deeper understanding of a rapidly evolving area aimed to tackle the age-related diseases in a more mechanistic way, as well as highlights future research opportunities.
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Basak D, Uddin MN, Hancock J. The Role of Oxidative Stress and Its Counteractive Utility in Colorectal Cancer (CRC). Cancers (Basel) 2020; 12:E3336. [PMID: 33187272 PMCID: PMC7698080 DOI: 10.3390/cancers12113336] [Citation(s) in RCA: 81] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 11/06/2020] [Accepted: 11/08/2020] [Indexed: 12/12/2022] Open
Abstract
An altered redox status accompanied by an elevated generation of reactive oxygen/nitrogen species (ROS/RNS) has been implicated in a number of diseases including colorectal cancer (CRC). CRC, being one of the most common cancers worldwide, has been reported to be associated with multiple environmental and lifestyle factors (e.g., dietary habits, obesity, and physical inactivity) and harboring heightened oxidative stress that results in genomic instability. Although under normal condition ROS regulate many signal transduction pathways including cell proliferation and survival, overwhelming of the antioxidant capacity due to metabolic abnormalities and oncogenic signaling leads to a redox adaptation response that imparts drug resistance. Nevertheless, excessive reliance on elevated production of ROS makes the tumor cells increasingly vulnerable to further ROS insults, and the abolition of such drug resistance through redox perturbation could be instrumental to preferentially eliminate them. The goal of this review is to demonstrate the evidence that links redox stress to the development of CRC and assimilate the most up-to-date information that would facilitate future investigation on CRC-associated redox biology. Concomitantly, we argue that the exploitation of this distinct biochemical property of CRC cells might offer a fresh avenue to effectively eradicate these cells.
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Affiliation(s)
- Debasish Basak
- College of Pharmacy, Larkin University, Miami, FL 33169, USA;
| | | | - Jake Hancock
- College of Pharmacy, Larkin University, Miami, FL 33169, USA;
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11
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Chong SJF, Marchi S, Petroni G, Kroemer G, Galluzzi L, Pervaiz S. Noncanonical Cell Fate Regulation by Bcl-2 Proteins. Trends Cell Biol 2020; 30:537-555. [PMID: 32307222 DOI: 10.1016/j.tcb.2020.03.004] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 03/15/2020] [Accepted: 03/19/2020] [Indexed: 12/20/2022]
Abstract
Bcl-2 proteins are widely known as key controllers of mitochondrial outer membrane permeabilization, arguably the most important step of intrinsic apoptosis. Accumulating evidence indicate that most, if not all, members of the Bcl-2 protein family also mediate a number of apoptosis-unrelated functions. Intriguingly, many of these functions ultimately impinge on cell fate decisions via apoptosis-dependent or -independent mechanisms, delineating a complex network through which Bcl-2 family members regulate cell survival and death. Here, we critically discuss the mechanisms through which Bcl-2 proteins influence cell fate as they regulate autophagy, cellular senescence, inflammation, bioenergetic metabolism, Ca2+ fluxes, and redox homeostasis.
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Affiliation(s)
| | - Saverio Marchi
- Department of Clinical and Molecular Sciences, Marche Polytechnic University, Ancona, Italy
| | - Giulia Petroni
- Department of Radiation Oncology, Weill Cornell Medical College, New York, NY, USA
| | - Guido Kroemer
- Equipe Labellisée par la Ligue Contre le Cancer, INSERM U1138, Centre de Recherche des Cordeliers, Paris, France; Metabolomics and Cell Biology Platforms, Gustave Roussy Comprehensive Cancer Institute, Villejuif, France; Pôle de Biologie, Hôpital Européen Georges Pompidou, AP-, HP, Paris, France; Suzhou Institute for Systems Medicine, Chinese Academy of Sciences, Suzhou, China; Department of Women's and Children's Health, Karolinska University Hospital, Stockholm, Sweden; Université de Paris, Paris, France
| | - Lorenzo Galluzzi
- Department of Radiation Oncology, Weill Cornell Medical College, New York, NY, USA; Université de Paris, Paris, France; Sandra and Edward Meyer Cancer Center, New York, NY, USA; Caryl and Israel Englander Institute for Precision Medicine, New York, NY, USA; Department of Dermatology, Yale School of Medicine, New Haven, CT, USA.
| | - Shazib Pervaiz
- Université de Paris, Paris, France; Department of Physiology, YLL School of Medicine and NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore; National University Cancer Institute, National University Health System, Singapore.
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12
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Ashraf S, Kim BJ, Park S, Park H, Lee SH. RHEB gene therapy maintains the chondrogenic characteristics and protects cartilage tissue from degenerative damage during experimental murine osteoarthritis. Osteoarthritis Cartilage 2019; 27:1508-1517. [PMID: 31229684 DOI: 10.1016/j.joca.2019.05.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 05/20/2019] [Accepted: 05/24/2019] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Osteoarthritis (OA) is characterized by cartilage degeneration resulting from hypertrophic changes in chondrocytes caused by altered gene expression. The involvement of Ras homolog enriched in brain (RHEB) in OA regulation is unclear. METHODS Human knee articular cartilage samples - were analyzed for structural and biological changes by histology, immunohistochemistry, real time PCR and western blotting. OA-mouse model developed by surgical destabilization of the medial meniscus (DMM) were treated with adenovirus harboring Rheb gene to analyze onset and progression of OA. Histological scoring, immunohistochemistry, and TUNEL assay was performed to assess cartilage damage across the entire joint. RESULTS Human and mouse OA cartilage is degenerated and has markedly reduced levels of RHEB. Human OA-degenerated chondrocytes (DC) exhibited a fibroblastic phenotype and 80 % of degenerative cartilage were senescent, with higher levels of reactive oxygen species (ROS). Gene expression analysis of DC revealed almost no COL2A1 expression and reduced SOX9 and RHEB expression. Transient transfection of RHEB rescued the DC phenotype and reduced senescence and ROS levels markedly. RHEB overexpression also increased COL2A1 and SOX9 expression. In an OA-mouse model, the Rheb protein level decreased as the severity of OA increased. Ectopic expression of Rheb using adenovirus in mouse-OA cartilage suppressed surgically-induced OA pathogenesis accompanied by modulation of Adamts5, Mmp 13, Col 10, and Col2a1 expression. Rheb induction significantly reduced apoptosis in OA-cartilage. CONCLUSION RHEB plays an important role in maintaining the chondrogenic characteristics of chondrocytes, and has potential in preventing progression of OA in the destabilize the medial meniscus (DMM) mouse model of OA.
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Affiliation(s)
- S Ashraf
- School of Integrative Engineering, Chung-Ang University, Seoul, Republic of Korea
| | - B J Kim
- Department of Medical Biotechnology, Dongguk University, Seoul, Republic of Korea
| | - S Park
- Department of Biomedical Science, CHA University, Seoul, Republic of Korea
| | - H Park
- School of Integrative Engineering, Chung-Ang University, Seoul, Republic of Korea.
| | - S-H Lee
- Department of Medical Biotechnology, Dongguk University, Seoul, Republic of Korea.
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Chong SJF, Lai JXH, Eu JQ, Bellot GL, Pervaiz S. Reactive Oxygen Species and Oncoprotein Signaling-A Dangerous Liaison. Antioxid Redox Signal 2018; 29:1553-1588. [PMID: 29186971 DOI: 10.1089/ars.2017.7441] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
SIGNIFICANCE There is evidence to implicate reactive oxygen species (ROS) in tumorigenesis and its progression. This has been associated with the interplay between ROS and oncoproteins, resulting in enhanced cellular proliferation and survival. Recent Advances: To date, studies have investigated specific contributions of the crosstalk between ROS and signaling networks in cancer initiation and progression. These investigations have challenged the established dogma of ROS as agents of cell death by demonstrating a secondary function that fuels cell proliferation and survival. Studies have thus identified (onco)proteins (Bcl-2, STAT3/5, RAS, Rac1, and Myc) in manipulating ROS level as well as exploiting an altered redox environment to create a milieu conducive for cancer formation and progression. CRITICAL ISSUES Despite these advances, drug resistance and its association with an altered redox metabolism continue to pose a challenge at the mechanistic and clinical levels. Therefore, identifying specific signatures, altered protein expressions, and modifications as well as protein-protein interplay/function could not only enhance our understanding of the redox networks during cancer initiation and progression but will also provide novel targets for designing specific therapeutic strategies. FUTURE DIRECTIONS Not only a heightened realization is required to unravel various gene/protein networks associated with cancer formation and progression, particularly from the redox standpoint, but there is also a need for developing more sensitive tools for assessing cancer redox metabolism in clinical settings. This review attempts to summarize our current knowledge of the crosstalk between oncoproteins and ROS in promoting cancer cell survival and proliferation and treatment strategies employed against these oncoproteins. Antioxid. Redox Signal.
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Affiliation(s)
- Stephen Jun Fei Chong
- 1 Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore , Singapore, Singapore
| | - Jolin Xiao Hui Lai
- 1 Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore , Singapore, Singapore
| | - Jie Qing Eu
- 2 Cancer Science Institute , Singapore, Singapore
| | - Gregory Lucien Bellot
- 1 Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore , Singapore, Singapore .,3 Department of Hand and Reconstructive Microsurgery, National University Health System , Singapore, Singapore
| | - Shazib Pervaiz
- 1 Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore , Singapore, Singapore .,4 NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore , Singapore, Singapore .,5 National University Cancer Institute, National University Health System , Singapore, Singapore .,6 School of Biomedical Sciences, Curtin University , Perth, Australia
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14
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Koundouros N, Poulogiannis G. Phosphoinositide 3-Kinase/Akt Signaling and Redox Metabolism in Cancer. Front Oncol 2018; 8:160. [PMID: 29868481 PMCID: PMC5968394 DOI: 10.3389/fonc.2018.00160] [Citation(s) in RCA: 249] [Impact Index Per Article: 41.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Accepted: 04/26/2018] [Indexed: 12/21/2022] Open
Abstract
Metabolic rewiring and the consequent production of reactive oxygen species (ROS) are necessary to promote tumorigenesis. At the nexus of these cellular processes is the aberrant regulation of oncogenic signaling cascades such as the phosphoinositide 3-kinase and AKT (PI3K/Akt) pathway, which is one of the most frequently dysregulated pathways in cancer. In this review, we examine the regulation of ROS metabolism in the context of PI3K-driven tumors with particular emphasis on four main areas of research. (1) Stimulation of ROS production through direct modulation of mitochondrial bioenergetics, activation of NADPH oxidases (NOXs), and metabolic byproducts associated with hyperactive PI3K/Akt signaling. (2) The induction of pro-tumorigenic signaling cascades by ROS as a consequence of phosphatase and tensin homolog and receptor tyrosine phosphatase redox-dependent inactivation. (3) The mechanisms through which PI3K/Akt activation confers a selective advantage to cancer cells by maintaining redox homeostasis. (4) Opportunities for therapeutically exploiting redox metabolism in PIK3CA mutant tumors and the potential for implementing novel combinatorial therapies to suppress tumor growth and overcome drug resistance. Further research focusing on the multi-faceted interactions between PI3K/Akt signaling and ROS metabolism will undoubtedly contribute to novel insights into the extensive pro-oncogenic effects of this pathway, and the identification of exploitable vulnerabilities for the treatment of hyperactive PI3K/Akt tumors.
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Affiliation(s)
- Nikos Koundouros
- Department of Cancer Biology, Institute of Cancer Research, London, United Kingdom.,Division of Computational and Systems Medicine, Department of Surgery and Cancer, Imperial College London, London, United Kingdom
| | - George Poulogiannis
- Department of Cancer Biology, Institute of Cancer Research, London, United Kingdom.,Division of Computational and Systems Medicine, Department of Surgery and Cancer, Imperial College London, London, United Kingdom
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15
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Hiraki M, Maeda T, Mehrotra N, Jin C, Alam M, Bouillez A, Hata T, Tagde A, Keating A, Kharbanda S, Singh H, Kufe D. Targeting MUC1-C suppresses BCL2A1 in triple-negative breast cancer. Signal Transduct Target Ther 2018; 3:13. [PMID: 29760958 PMCID: PMC5948210 DOI: 10.1038/s41392-018-0013-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 02/28/2018] [Accepted: 03/08/2018] [Indexed: 12/18/2022] Open
Abstract
B-cell lymphoma 2-related protein A1 (BCL2A1) is a member of the BCL-2 family of anti-apoptotic proteins that confers resistance to treatment with anti-cancer drugs; however, there are presently no agents that target BCL2A1. The MUC1-C oncoprotein is aberrantly expressed in triple-negative breast cancer (TNBC) cells, induces the epithelial-mesenchymal transition (EMT) and promotes anti-cancer drug resistance. The present study demonstrates that targeting MUC1-C genetically and pharmacologically in TNBC cells results in the downregulation of BCL2A1 expression. The results show that MUC1-C activates the BCL2A1 gene by an NF-κB p65-mediated mechanism, linking this pathway with the induction of EMT. The MCL-1 anti-apoptotic protein is also of importance for the survival of TNBC cells and is an attractive target for drug development. We found that inhibiting MCL-1 with the highly specific MS1 peptide results in the activation of the MUC1-C→NF-κB→BCL2A1 pathway. In addition, selection of TNBC cells for resistance to ABT-737, which inhibits BCL-2, BCL-xL and BCL-W but not MCL-1 or BCL2A1, is associated with the upregulation of MUC1-C and BCL2A1 expression. Targeting MUC1-C in ABT-737-resistant TNBC cells suppresses BCL2A1 and induces death, which is of potential therapeutic importance. These findings indicate that MUC1-C is a target for the treatment of TNBCs unresponsive to agents that inhibit anti-apoptotic members of the BCL-2 family.
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Affiliation(s)
- Masayuki Hiraki
- 1Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA USA.,4Present Address: Department of Gastrointestinal Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871 Japan
| | - Takahiro Maeda
- 1Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA USA
| | - Neha Mehrotra
- 2Center for Biomedical, Indian Institute of Technology, Delhi, India
| | - Caining Jin
- 1Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA USA
| | - Maroof Alam
- 1Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA USA
| | - Audrey Bouillez
- 1Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA USA
| | - Tsuyoshi Hata
- 1Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA USA
| | - Ashujit Tagde
- 1Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA USA
| | - Amy Keating
- 3Departments of Biology and Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA USA
| | | | - Harpal Singh
- 2Center for Biomedical, Indian Institute of Technology, Delhi, India
| | - Donald Kufe
- 1Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA USA
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16
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Yang X, Mao X, Ding X, Guan F, Jia Y, Luo L, Li B, Tan H, Cao C. miR-146a down-regulation alleviates H 2O 2-induced cytotoxicity of PC12 cells by regulating MCL1/JAK/STAT pathway : miR-146a down-regulation relieves H2O2-induced PC12 cells cytotoxicity by MCL1/JAK/STAT. Cell Biol Toxicol 2018; 34:479-489. [PMID: 29484526 DOI: 10.1007/s10565-018-9424-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 02/12/2018] [Indexed: 01/30/2023]
Abstract
Oxidative stress and miRNAs have been confirmed to play an important role in neurological diseases. The study aimed to explore the underlying effect and mechanisms of miR-146a in H2O2-induced injury of PC12 cells. Here, PC12 cells were stimulated with 200 μM of H2O2 to construct oxidative injury model. Cell injury was evaluated on the basis of the changes in cell viability, migration, invasion, apoptosis, and DNA damage. Results revealed that miR-146a expression was up-regulated in H2O2-induced PC12 cells. Functional analysis showed that down-regulation of miR-146a alleviated H2O2-induced cytotoxicity in PC12 cells. Dual-luciferase reporter and western blot assay verified that MCL1 was a direct target gene of miR-146a. Moreover, anti-miR-146a-mediated suppression on cell cytotoxicity was abated following MCL1 knockdown in H2O2-induced PC12 cells. Furthermore, MCL1 activated JAK/STAT signaling pathway and MCL1 overexpression attenuated H2O2-induced cytotoxicity in PC12 cells by JAK/STAT signaling pathway. In conclusion, this study suggested that suppression of miR-146a abated H2O2-induced cytotoxicity in PC12 cells via regulating MCL1/JAK/STAT pathway.
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Affiliation(s)
- Xuecheng Yang
- Department of Urology, The Affiliated Hospital of Qingdao University, Qingdao, 266003, China
| | - Xin Mao
- Department of Urology, The Affiliated Hospital of Qingdao University, Qingdao, 266003, China
| | - Xuemei Ding
- Department of Urology, The Affiliated Hospital of Qingdao University, Qingdao, 266003, China
| | - Fengju Guan
- Department of Urology, The Affiliated Hospital of Qingdao University, Qingdao, 266003, China
| | - Yuefeng Jia
- Department of Urology, The Affiliated Hospital of Qingdao University, Qingdao, 266003, China
| | - Lei Luo
- Department of Urology, The Affiliated Hospital of Qingdao University, Qingdao, 266003, China
| | - Bin Li
- Department of Urology, The Affiliated Hospital of Qingdao University, Qingdao, 266003, China
| | - Hailin Tan
- Department of Urology, The Affiliated Hospital of Qingdao University, Qingdao, 266003, China
| | - Caixia Cao
- Department of Endocrinology, The Affiliated Hospital of Qingdao University, No. 16 of Jiangsu Road, Qingdao, 266003, China.
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17
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Lin S, Li Y, Zamyatnin AA, Werner J, Bazhin AV. Reactive oxygen species and colorectal cancer. J Cell Physiol 2018; 233:5119-5132. [PMID: 29215746 DOI: 10.1002/jcp.26356] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 11/20/2017] [Indexed: 12/13/2022]
Abstract
Colorectal cancer (CRC) has become the fourth leading cause of cancer-related death in the worldwide. It is urgent to find more effective therapeutic strategies for it. Reactive oxygen species (ROS) play multiple roles in normal cellular physiology processes. Thus, a certain level of ROS is essential to keep normal cellular function. However, the accumulation of ROS shows dual roles for cells, which is mainly dependent on the concentration of ROS, the origin of the cancer cell and the activated signaling pathways during tumor progression. In general, moderate level of ROS leads to cell damage, DNA mutation and inflammation, which promotes the initiation and development of cancer. Excessive high level of ROS induces cancer cell death, showing an anti-cancer role. ROS are commonly higher in CRC cells than their normal counterpart cells. Therefore, it is possible that ROS induce cell death in cancer cells while not affecting the normal cells, demonstrating lower side effects. Besides, ROS also play a role in tumor microenvironment and drug resistance. These multiple roles of ROS make them a promising therapeutic target for cancer. To explore potential ROS-target therapies against CRC, it is worth to comprehensively understanding the role of ROS in CRC and therapy. In this review, we mainly discuss the strategies of ROS in CRC therapy, including direct CRC cell target and indirect tumor environment target. In addition, the influences of ROS in drug resistance will also been discussed.
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Affiliation(s)
- Sisi Lin
- Department of Pathophysiology, Institute of Digestive Disease, Tongji University School of Medicine, Shanghai, China.,Department of General, Visceral, and Transplant Surgery, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Yongyu Li
- Department of Pathophysiology, Institute of Digestive Disease, Tongji University School of Medicine, Shanghai, China
| | - Andrey A Zamyatnin
- Institute of Molecular Medicine, Sechenov First Moscow State Medical University, Moscow, Russia.,Department of Cell Signalling, Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Jens Werner
- Department of General, Visceral, and Transplant Surgery, Ludwig-Maximilians-University Munich, Munich, Germany.,German Cancer Consortium (DKTK), Partner Site Munich, Munich, Germany
| | - Alexandr V Bazhin
- Department of General, Visceral, and Transplant Surgery, Ludwig-Maximilians-University Munich, Munich, Germany.,German Cancer Consortium (DKTK), Partner Site Munich, Munich, Germany
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18
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Sakai Y, Yamamori T, Yoshikawa Y, Bo T, Suzuki M, Yamamoto K, Ago T, Inanami O. NADPH oxidase 4 mediates ROS production in radiation-induced senescent cells and promotes migration of inflammatory cells. Free Radic Res 2017; 52:92-102. [PMID: 29228832 DOI: 10.1080/10715762.2017.1416112] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Excessive DNA damage induced by ionising radiation (IR) to normal tissue cells is known to trigger cellular senescence, a process termed stress-induced premature senescence (SIPS). SIPS is often accompanied by the production of reactive oxygen species (ROS), and this is reported to be important for the initiation and maintenance of SIPS. However, the source of ROS during SIPS after IR and their significance in radiation-induced normal tissue damage remain elusive. In the present study, we tested the hypothesis that the NADPH oxidase (NOX) family of proteins mediates ROS production in SIPS-induced cells after IR and plays a role in SIPS-associated biological events. X-irradiation of primary mouse embryonic fibroblasts (MEFs) resulted in cellular senescence and the concomitant increase of intracellular ROS. Among all six murine NOX isoforms (NOX1-4 and DUOX1/2), only NOX4 was detectable under basal conditions and was upregulated following IR. In addition, radiation-induced ROS production was diminished by genetic or pharmacological inhibition of NOX4. Meanwhile, NOX4 deficiency did not affect the induction of cellular senescence after IR. Furthermore, the migration of human monocytic U937 cells to the culture medium collected from irradiated MEFs was significantly reduced by NOX4 inhibition, suggesting that NOX4 promotes the recruitment of inflammatory cells. Collectively, our findings imply that NOX4 mediates ROS production in radiation-induced senescent cells and contributes to normal tissue damage after IR via the recruitment of inflammatory cells and the exacerbation of tissue inflammation.
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Affiliation(s)
- Yuri Sakai
- a Laboratory of Radiation Biology, Department of Applied Veterinary Sciences, Faculty of Veterinary Medicine , Hokkaido University , Sapporo , Japan
| | - Tohru Yamamori
- a Laboratory of Radiation Biology, Department of Applied Veterinary Sciences, Faculty of Veterinary Medicine , Hokkaido University , Sapporo , Japan
| | - Yoji Yoshikawa
- b Department of Medicine and Clinical Science, Graduate School of Medical Sciences , Kyushu University , Fukuoka , Japan
| | - Tomoki Bo
- a Laboratory of Radiation Biology, Department of Applied Veterinary Sciences, Faculty of Veterinary Medicine , Hokkaido University , Sapporo , Japan
| | - Motofumi Suzuki
- c Radiation and Cancer Biology Team , National Institutes for Quantum and Radiobiological Science and Technology , Chiba , Japan
| | - Kumiko Yamamoto
- a Laboratory of Radiation Biology, Department of Applied Veterinary Sciences, Faculty of Veterinary Medicine , Hokkaido University , Sapporo , Japan
| | - Tetsuro Ago
- b Department of Medicine and Clinical Science, Graduate School of Medical Sciences , Kyushu University , Fukuoka , Japan
| | - Osamu Inanami
- a Laboratory of Radiation Biology, Department of Applied Veterinary Sciences, Faculty of Veterinary Medicine , Hokkaido University , Sapporo , Japan
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19
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Lin N, Niu Y, Zhang W, Li X, Yang Z, Su Q. microRNA-802 is involved in palmitate-induced damage to pancreatic β cells through repression of sirtuin 6. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2017; 10:11300-11307. [PMID: 31966484 PMCID: PMC6965834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Accepted: 10/30/2017] [Indexed: 06/10/2023]
Abstract
Free fatty acid (FFA)-induced pancreatic β-cell loss is implicated in the pathogenesis of type 2 diabetes mellitus (T2DM). It has been documented that circulating microRNA (miR)-802 levels are significantly greater in T2DM patients than in healthy subjects. However, the role of miR-802 in FFA-induced damage to β cells is still unclear. In the present study, we measured the expression of miR-802 in the INS-1 rat insulinoma cell line after palmitate treatment for 48 h. Gain- and loss-of-function studies were conducted to determine the function of miR-802 in palmitate-induced apoptosis and reactive oxygen species (ROS) production. The target gene(s) of miR-802 was functionally characterized. Compared to control cells, palmitate treatment caused a time- and concentration-dependent induction of miR-802 in INS-1 cells. Knockdown of miR-802 significantly blocked palmitate-induced apoptosis and attenuated ROS formation. Moreover, miR-802 downregulation prevented the reduction of prosurvival proteins Mcl-1 and Bcl-xL by palmitate. In contrast, ectopic expression of miR-802 stimulated apoptosis and ROS generation in INS-1 cells. Sirtuin 6 (SIRT6) was identified to be a direct target gene of miR-802. Overexpression of miR-802 suppressed the expression of SIRT6. Enforced expression of SIRT6 abolished the induction of apoptosis and ROS production by miR-802. Taken together, miR-802 is required for palmitate-induced damage to β cells by targeting SIRT6 and represents a potential therapeutic target for T2DM.
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Affiliation(s)
- Ning Lin
- Department of Endocrinology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai, China
| | - Yixin Niu
- Department of Endocrinology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai, China
| | - Weiwei Zhang
- Department of Endocrinology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai, China
| | - Xiaoyong Li
- Department of Endocrinology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai, China
| | - Zhen Yang
- Department of Endocrinology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai, China
| | - Qing Su
- Department of Endocrinology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai, China
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