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Li H, Zhang H, He X, Zhao P, Wu T, Xiahou J, Wu Y, Liu Y, Chen Y, Jiang X, Lv G, Yao Z, Wu J, Bu W. Blocking Spatiotemporal Crosstalk between Subcellular Organelles for Enhancing Anticancer Therapy with Nanointercepters. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2211597. [PMID: 36746119 DOI: 10.1002/adma.202211597] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/16/2023] [Indexed: 05/05/2023]
Abstract
The spatiotemporal characterization of signaling crosstalk between subcellular organelles is crucial for the therapeutic effect of malignant tumors. Blocking interactive crosstalk in this fashion is significant but challenging. Herein, a communication interception strategy is reported, which blocks spatiotemporal crosstalk between subcellular organelles for cancer therapy with underlying molecular mechanisms. Briefly, amorphous-core@crystalline-shell Fe@Fe3 O4 nanoparticles (ACFeNPs) are fabricated to specifically block the crosstalk between lysosomes and endoplasmic reticulum (ER) by hydroxyl radicals generated along with their trajectory through heterogeneous Fenton reaction. ACFeNPs initially enter lysosomes and trigger autophagy, then continuous lysosomal damage blocks the generation of functional autolysosomes, which mediates ER-lysosome crosstalk, thus the autophagy is paralyzed. Thereafter, released ACFeNPs from lysosomes induce ER stress. Without the alleviation by autophagy, the ER-stress-associated apoptotic pathway is fully activated, resulting in a remarkable therapeutic effect. This strategy provides a wide venue for nanomedicine to exert biological advantages and confers new perspective for the design of novel anticancer drugs.
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Affiliation(s)
- Huiyan Li
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
- Department of Medical Microbiology and Parasitology, MOE/NHC/CAMS Key Laboratory of Medical Molecular Virology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, P. R. China
| | - Huilin Zhang
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
- Departments of Radiology and Neurosurgery, Huashan Hospital, Fudan University, Shanghai, 200040, P. R. China
| | - Xiaofang He
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Peiran Zhao
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
| | - Tong Wu
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
| | - Jinxuan Xiahou
- Department of Medical Microbiology and Parasitology, MOE/NHC/CAMS Key Laboratory of Medical Molecular Virology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, P. R. China
| | - Yelin Wu
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, P. R. China
| | - Yanyan Liu
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
| | - Yang Chen
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, P. R. China
| | - Xingwu Jiang
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
| | - Guanglei Lv
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
| | - Zhenwei Yao
- Departments of Radiology and Neurosurgery, Huashan Hospital, Fudan University, Shanghai, 200040, P. R. China
| | - Jian Wu
- Department of Medical Microbiology and Parasitology, MOE/NHC/CAMS Key Laboratory of Medical Molecular Virology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, P. R. China
| | - Wenbo Bu
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
- Departments of Radiology and Neurosurgery, Huashan Hospital, Fudan University, Shanghai, 200040, P. R. China
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2
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Nandi S, Mondal A, Ghosh A, Mukherjee S, Das C. Lnc-ing epigenetic mechanisms with autophagy and cancer drug resistance. Adv Cancer Res 2023; 160:133-203. [PMID: 37704287 DOI: 10.1016/bs.acr.2023.03.002] [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] [Indexed: 09/15/2023]
Abstract
Long noncoding RNAs (lncRNAs) comprise a diverse class of RNA molecules that regulate various physiological processes and have been reported to be involved in several human pathologies ranging from neurodegenerative disease to cancer. Therapeutic resistance is a major hurdle for cancer treatment. Over the past decade, several studies has emerged on the role of lncRNAs in cancer drug resistance and many trials have been conducted employing them. LncRNAs also regulate different cell death pathways thereby maintaining a fine balance of cell survival and death. Autophagy is a complex cell-killing mechanism that has both cytoprotective and cytotoxic roles. Similarly, autophagy can lead to the induction of both chemosensitization and chemoresistance in cancer cells upon therapeutic intervention. Recently the role of lncRNAs in the regulation of autophagy has also surfaced. Thus, lncRNAs can be used in cancer therapeutics to alleviate the challenges of chemoresistance by targeting the autophagosomal axis. In this chapter, we discuss about the role of lncRNAs in autophagy-mediated cancer drug resistance and its implication in targeted cancer therapy.
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Affiliation(s)
- Sandhik Nandi
- Biophysics and Structural Genomics Division, Saha Institute of Nuclear Physics, Kolkata, India; Homi Bhabha National Institute, Mumbai, India
| | - Atanu Mondal
- Biophysics and Structural Genomics Division, Saha Institute of Nuclear Physics, Kolkata, India; Homi Bhabha National Institute, Mumbai, India
| | - Aritra Ghosh
- Biophysics and Structural Genomics Division, Saha Institute of Nuclear Physics, Kolkata, India; Indian Institute of Science Education and Research, Kolkata, India
| | - Shravanti Mukherjee
- Biophysics and Structural Genomics Division, Saha Institute of Nuclear Physics, Kolkata, India
| | - Chandrima Das
- Biophysics and Structural Genomics Division, Saha Institute of Nuclear Physics, Kolkata, India; Homi Bhabha National Institute, Mumbai, India.
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3
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Gonzalez-Molina J, Moyano-Galceran L, Single A, Gultekin O, Alsalhi S, Lehti K. Chemotherapy as a regulator of extracellular matrix-cell communication: Implications in therapy resistance. Semin Cancer Biol 2022; 86:224-236. [PMID: 35331851 DOI: 10.1016/j.semcancer.2022.03.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 03/16/2022] [Accepted: 03/17/2022] [Indexed: 02/08/2023]
Abstract
The development of most solid cancers, including pancreatic, breast, lung, liver, and ovarian cancer, involves a desmoplastic reaction: a process of major remodeling of the extracellular matrix (ECM) affecting the ECM composition, mechanics, and microarchitecture. These properties of the ECM influence key cancer cell functions, including treatment resistance. Furthermore, emerging data show that various chemotherapeutic treatments lead to alterations in ECM features and ECM-cell communication. Here, we summarize the current knowledge around the effects of chemotherapy on both the ECM remodeling and ECM-cell signaling and discuss the implications of these alterations on distinct mechanisms of chemoresistance. Additionally, we provide an overview of current therapeutic strategies and ongoing clinical trials utilizing anti-cancer drugs to target the ECM-cell communication and explore the future challenges of these strategies.
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Affiliation(s)
- Jordi Gonzalez-Molina
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden.
| | - Lidia Moyano-Galceran
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Andrew Single
- Department of Biomedical Laboratory Science, Norwegian University of Science and Technology, Trondheim, Norway
| | - Okan Gultekin
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Shno Alsalhi
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Kaisa Lehti
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden; Department of Biomedical Laboratory Science, Norwegian University of Science and Technology, Trondheim, Norway.
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4
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Qu J, Wang Q, Sun X, Li Y. The environment and female reproduction: Potential mechanism of cadmium poisoning to the growth and development of ovarian follicle. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 244:114029. [PMID: 36055045 DOI: 10.1016/j.ecoenv.2022.114029] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 08/24/2022] [Accepted: 08/25/2022] [Indexed: 06/15/2023]
Abstract
Cadmium (Cd) is ubiquitous in our environment and can easily bioaccumulate into the organism after passage through the respiratory and digestive tracts. Long-term exposure to Cd can result in the significant bioaccumulation in organism because of its long biological high-life (10-30 years), which exerts irreversible damages on the health of animals and humans. Although there are increased evidence of impeding the normal function of female reproduction resulted from Cd exposure, the mechanism of the negative action of Cd on the growth and development of ovarian follicle remains enigmatic. Thus, the purpose of the presented study is to summarize available literature which describing Cd-related toxicity involved in the adverse effects on the growth and development of the ovarian follicle. In conclusion, it is suggested that Cd causes damage to the folliculogenesis of mammalians, which results in the decline in the number and quality of ovulated oocytes and the failure in the fertilization. The mechanism behinds that may be linked to the interference to the production of reproductive hormones and the augment of reactive oxygen species (ROS). Furthermore, the enhanced ROS, in turn, impairs various molecules including proteins, lipids and DNA, as well as the balance of the antioxidant defense system, mitochondrial homeostasis, endoplasmic reticulum, autophagy and epigenetic modification. This review is expected to elaborate the toxic mechanism of Cd exposure to the growth and development of ovarian follicles and provide essential remediation strategies to alleviate the damage of Cd to female reproductive health.
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Affiliation(s)
- Jingwen Qu
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; Department of Animal Science, University of Vermont, Burlington, VT 05405, USA.
| | - Qiang Wang
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China.
| | - Xiaomei Sun
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China.
| | - Yongjun Li
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China.
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Koto Y, Kawahara H, Kurata K, Yoshikiyo K, Hashiguchi A, Okano K, Sugiura N, Shimizu K, Shimizu H. Microcystin-LR incorporated into colonic cells through probenecid-sensitive transporters leads to upregulated MCP-1 expression induced by JNK activation. Toxicol Rep 2022; 9:937-944. [PMID: 35875256 PMCID: PMC9301606 DOI: 10.1016/j.toxrep.2022.04.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 04/16/2022] [Accepted: 04/18/2022] [Indexed: 11/29/2022] Open
Abstract
Harmful algae that inhabit eutrophic lakes produce cyanotoxic microcystins. Therefore, the relationship between chronic exposure to microcystins via drinking water and organ disorders has been investigated. The present study aimed to determine whether representative microcystin-LR is involved in increased monocyte chemoattractant protein-1 (MCP-1) expression in rat colonic mucosa and enterocyte-like differentiated Caco-2 cells. The mRNA expression of MCP-1 was increased in the colons of rats administered with microcystin-LR, compared with controls. Furthermore, mRNA levels of MCP-1 expression significantly and positively correlated with those of Adhesion G Protein-Coupled Receptor E1 (ADGRE1; EMR1; F4/80), an indicator of macrophage infiltration, suggesting that increased MCP-1 expression induced by microcystin-LR promotes macrophage infiltration into the colon. Microcystin-LR increased MCP-1 expression in enterocyte-like differentiated Caco-2 cells, by activating c-Jun N-terminal kinase (JNK), but not extracellular signal-regulated kinase (ERK) or p38. The findings of transporter inhibitors indicated that microcystin-LR is incorporated into cells via ATP Binding Cassette (ABC) or solute carrier (SLC) transporters other than the organic anion transporting polypeptides (OATPs)1B1, 1B3, 2B1, and 1A2, which this leads to increased MCP-1 expression in the colon through activating JNK. Thus, increased MCP-1 expression induced by microcystin-LR might be a trigger for initiating tumorigenesis with inflammation in the colon because increased MCP-1 expression induces inflammation associated with macrophage infiltration into the colon, and chronic inflammation is associated with the initiation of tumorigenesis. Microcystin-LR upregulated colonic MCP-1 expression in rats. Increased MCP-1 expression correlated with accumulated macrophages in rat colon. Microcystin-LR evoked MCP-1 expression by activating JNK in cultured colon cells. Rifampicin was not involved in microcystin-LR-induced JNK activation. Probenecid suppressed JNK/MCP-1 pathway activation induced by microcystin-LR.
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Affiliation(s)
- Yoshihito Koto
- Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu-Cho, Matsue, Shimane 690-8504, Japan
| | - Hideaki Kawahara
- Graduate School of Life and Environmental Science, Shimane University, 1060 Nishikawatsu-Cho, Matsue, Shimane 690-8504, Japan
| | - Koichi Kurata
- Graduate School of Life and Environmental Science, Shimane University, 1060 Nishikawatsu-Cho, Matsue, Shimane 690-8504, Japan
| | - Keisuke Yoshikiyo
- Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu-Cho, Matsue, Shimane 690-8504, Japan
- Graduate School of Life and Environmental Science, Shimane University, 1060 Nishikawatsu-Cho, Matsue, Shimane 690-8504, Japan
- Institute of Agricultural and Life Sciences, Academic Assembly, Shimane University, 1060 Nishikawatsu-Cho, Matsue, Shimane 690-8504, Japan
| | - Ayumi Hashiguchi
- Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu-Cho, Matsue, Shimane 690-8504, Japan
- Graduate School of Life and Environmental Science, Shimane University, 1060 Nishikawatsu-Cho, Matsue, Shimane 690-8504, Japan
- Institute of Environmental Systems Science, Academic Assembly, Shimane University, 1060 Nishikawatsu-Cho, Matsue, Shimane 690-8504, Japan
- Estuary Research Center, Shimane University, 1060 Nishikawatsu-Cho, Matsue, Shimane 690-8504, Japan
| | - Kunihiro Okano
- Faculty of Bioresource Sciences, Akita Prefectural University, Akita 010-0195, Japan
| | - Norio Sugiura
- Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki 305-8572, Japan
| | - Kazuya Shimizu
- Faculty of Life Sciences, Toyo University, Gunma 374-0193, Japan
| | - Hidehisa Shimizu
- Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu-Cho, Matsue, Shimane 690-8504, Japan
- Graduate School of Life and Environmental Science, Shimane University, 1060 Nishikawatsu-Cho, Matsue, Shimane 690-8504, Japan
- Institute of Agricultural and Life Sciences, Academic Assembly, Shimane University, 1060 Nishikawatsu-Cho, Matsue, Shimane 690-8504, Japan
- Estuary Research Center, Shimane University, 1060 Nishikawatsu-Cho, Matsue, Shimane 690-8504, Japan
- Raman Project Center for Medical and Biological Applications, Shimane University, 1060 Nishikawatsu-Cho, Matsue, Shimane 690-8504, Japan
- Project Center for Fortification of Local Specialty Food Functions, Shimane University, 1060 Nishikawatsu-Cho, Matsue, Shimane 690-8504, Japan
- Interdisciplinary Center for Science Research, Shimane University, 1060 Nishikawatsu-Cho, Matsue, Shimane 690-8504, Japan
- Correspondence to: Institute of Agricultural and Life Sciences, Academic Assembly, Shimane University, 1060 Nishikawatsu-Cho, Matsue, Shimane 690-8504, Japan.
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6
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Kechiche S, Venditti M, Knani L, Jabłońska K, Dzięgiel P, Messaoudi I, Reiter RJ, Minucci S. First evidence of the protective role of melatonin in counteracting cadmium toxicity in the rat ovary via the mTOR pathway. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 270:116056. [PMID: 33199064 DOI: 10.1016/j.envpol.2020.116056] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 09/11/2020] [Accepted: 11/06/2020] [Indexed: 06/11/2023]
Abstract
Herein, the first evidence of the ability of melatonin (MLT) to counteract cadmium (Cd) toxic effects on the rat ovary is reported. Cd treatment, enhancing oxidative stress, provoked clear morphological, histological and biomolecular alterations, i.e. in the estrous cycle duration, in the ovarian and serum E2 concentration other than in the steroidogenic and folliculogenic genes expression. Results demonstrated that the use of MLT, in combination with Cd, avoided the changes, strongly suggesting that it is an efficient antioxidant for preventing oxidative stress in the rat ovary. Moreover, to explore the underlying mechanism involved, at molecular level, in the effects of Cd-MLT interaction, the study focused on the mTOR and ERK1/2 pathways. Interestingly, data showed that Cd influenced the phosphorylation status of mTOR, of its downstream effectors and of ERK1/2, inducing autophagy and apoptosis, while cotreatment with MLT nullified these changes. This work highlights the beneficial role exerted by MLT in preventing Cd-induced toxicity in the rat ovary, encouraging further studies to confirm its action on human ovarian health with the aim to use this indolamine to ameliorate oocyte quality in women with fertility disorders.
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Affiliation(s)
- Safa Kechiche
- Laboratoire LR11ES41 Génétique Biodiversité et Valorisation des Bio-ressources, Institut Supérieur de Biotechnologie de Monastir, Université de Monastir, Monastir, Tunisia
| | - Massimo Venditti
- Dipartimento di Medicina Sperimentale, Sez. Fisiologia Umana e Funzioni Biologiche Integrate "F. Bottazzi", Università Della Campania "Luigi Vanvitelli", Napoli, Italy
| | - Latifa Knani
- Laboratoire LR11ES41 Génétique Biodiversité et Valorisation des Bio-ressources, Institut Supérieur de Biotechnologie de Monastir, Université de Monastir, Monastir, Tunisia
| | - Karolina Jabłońska
- Division of Histology and Embryology, Department of Human Morphology and Embryology, Wroclaw Medical University, Wroclaw, Poland
| | - Piotr Dzięgiel
- Division of Histology and Embryology, Department of Human Morphology and Embryology, Wroclaw Medical University, Wroclaw, Poland
| | - Imed Messaoudi
- Laboratoire LR11ES41 Génétique Biodiversité et Valorisation des Bio-ressources, Institut Supérieur de Biotechnologie de Monastir, Université de Monastir, Monastir, Tunisia
| | - Russel J Reiter
- Department of Cellular and Structural Biology, UT Health Science Center, San Antonio, TX, USA
| | - Sergio Minucci
- Dipartimento di Medicina Sperimentale, Sez. Fisiologia Umana e Funzioni Biologiche Integrate "F. Bottazzi", Università Della Campania "Luigi Vanvitelli", Napoli, Italy.
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7
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Targeting autophagy to overcome drug resistance: further developments. J Hematol Oncol 2020; 13:159. [PMID: 33239065 PMCID: PMC7687716 DOI: 10.1186/s13045-020-01000-2] [Citation(s) in RCA: 127] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 11/15/2020] [Indexed: 12/13/2022] Open
Abstract
Inhibiting cell survival and inducing cell death are the main approaches of tumor therapy. Autophagy plays an important role on intracellular metabolic homeostasis by eliminating dysfunctional or unnecessary proteins and damaged or aged cellular organelles to recycle their constituent metabolites that enable the maintenance of cell survival and genetic stability and even promotes the drug resistance, which severely limits the efficacy of chemotherapeutic drugs. Currently, targeting autophagy has a seemingly contradictory effect to suppress and promote tumor survival, which makes the effect of targeting autophagy on drug resistance more confusing and fuzzier. In the review, we summarize the regulation of autophagy by emerging ways, the action of targeting autophagy on drug resistance and some of the new therapeutic approaches to treat tumor drug resistance by interfering with autophagy-related pathways. The full-scale understanding of the tumor-associated signaling pathways and physiological functions of autophagy will hopefully open new possibilities for the treatment of tumor drug resistance and the improvement in clinical outcomes.
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Ran D, Ma Y, Liu W, Luo T, Zheng J, Wang D, Song R, Zhao H, Zou H, Gu J, Yuan Y, Bian J, Liu Z. TGF-β-activated kinase 1 (TAK1) mediates cadmium-induced autophagy in osteoblasts via the AMPK / mTORC1 / ULK1 pathway. Toxicology 2020; 442:152538. [PMID: 32693121 DOI: 10.1016/j.tox.2020.152538] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 06/23/2020] [Accepted: 07/13/2020] [Indexed: 01/28/2023]
Abstract
Cadmium (Cd) is one of worldwide environmental pollutants that causes bone homeostasis, which depends on the resorption of bones by osteoclasts and formation of bones by the osteoblasts (OB). However, the Cd toxicity on OB and its mechanism are unclear. Autophagy is an evolutionarily conserved degradation process in which domestic intracellular components are selectively digested for the recycling of nutrients and energy. This process is indispensable for cell homeostasis maintenance and stress responses. Dysregulation at the level of autophagic activity consequently disturbs the balance between bone formation and bone resorption and mediates the onset and progression of multiple bone diseases, including osteoporosis. TAK1 has been recently emerged as an activator of AMPK and hence an autophagy inducer. AMPK is a key molecule that induces autophagy and regulates cellular metabolism to maintain energy homeostasis. Conversely, autophagy is inhibited by mTORC1. In this study, we found that Cd treatment caused the formation of autophagosomes, LC3-II lipidation and p62 downregulation, and the increased autophagic flux, indicating that Cd treatment induced autophagy in OBs. Cd treatment induced TAK1 activation mediated AMPK phosphorylation, which promoted autophagy via phosphorylation of ULK1 at S317. Meanwhile, Cd treatment dramatically decreased mTORC1, S6K1, 4E-BP1, S6, ULK1S555 and ULK1S757 phosphorylation, suggesting that mTORC1 activity was inhibited and inactive mTORC1 prevents ULK1 activation by phosphorylating ULK1 at SerS555 and Ser757. Our data strongly suggest that TAK1 mediates AMPK activation, which activates ULK1 by phosphorylating ULK1S317 and suppressing mTORC1-mediated ULK1S555 and ULK1S757 phosphorylation. Our study has revealed a signaling mechanism for TAK1 in Cd-induced autophagy in OBs.
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Affiliation(s)
- Di Ran
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China; Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, 225009, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, PR China
| | - Yonggang Ma
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China; Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, 225009, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, PR China
| | - Wei Liu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China; Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, 225009, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, PR China
| | - Tongwang Luo
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China; Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, 225009, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, PR China
| | - Jiaming Zheng
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China; Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, 225009, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, PR China
| | - Dedong Wang
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China; Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, 225009, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, PR China
| | - Ruilong Song
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China; Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, 225009, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, PR China
| | - Hongyan Zhao
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China; Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, 225009, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, PR China
| | - Hui Zou
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China; Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, 225009, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, PR China
| | - Jianhong Gu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China; Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, 225009, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, PR China
| | - Yan Yuan
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China; Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, 225009, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, PR China
| | - Jianchun Bian
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China; Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, 225009, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, PR China
| | - Zongping Liu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China; Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, 225009, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, PR China.
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9
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Gu J, Wang Y, Liu Y, Shi M, Yin L, Hou Y, Zhou Y, Chu Wong CK, Chen D, Guo Z, Shi H. Inhibition of Autophagy Alleviates Cadmium-Induced Mouse Spleen and Human B Cells Apoptosis. Toxicol Sci 2019; 170:109-122. [DOI: 10.1093/toxsci/kfz089] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Abstract
Cadmium (Cd) is a toxic heavy metal that can accumulate and cause severe damage to many organs, such as liver, kidney, lung, etc. Cd also significantly suppresses immunity, however, the underlying mechanism involved in Cd-induced immunnotoxicity is still unclear. The present study indicated that semichronic Cd exposure (7 days) induced apoptotic damage of mouse spleen. In human Ramos B cells, Cd exposure also induced apoptosis, which was dependent on Cd-induced vacuole membrane protein 1 (VMP1) expression and autophagy. Cd-induced autophagy and apoptosis were abated when VMP1 expression was knockdown. In addition, Cd-induced VMP1 expression, autophagy, and apoptosis were dependent on the elevation of Ca2+ and reactive oxygen species (ROS). More important, Cd exposure also induced VMP1 expression and autophagy in mouse spleen tissue, and the intraperitoneal injection of the autophagy inhibitor chloroquine (CQ) into mice effectively reduced Cd-induced spleen apoptotic damage. Taken together, these results indicate Cd-induced autophagy, promotes apoptosis in immune cells, and inhibition of autophagy can alleviate Cd-induced spleen and immune cell apoptosis. This study might provide the groundwork for future studies on Cd-induced immunomodulatory effects and immune diseases.
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Affiliation(s)
- Jie Gu
- Institute of Life Sciences, Jiangsu University
| | - Yanwei Wang
- Institute of Life Sciences, Jiangsu University
| | - Yanmin Liu
- Institute of Life Sciences, Jiangsu University
| | - Meilin Shi
- Institute of Life Sciences, Jiangsu University
| | - Liangdong Yin
- Department of Osteology, The Third Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu 212000, China
| | | | - Yang Zhou
- Institute of Life Sciences, Jiangsu University
| | | | - Dongfeng Chen
- Institute of Life Sciences, Jiangsu University
- Department of Rheumatology and Inflammation Research, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Zhigang Guo
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Science, Nanjing Normal University, Nanjing, Jiangsu 210023, China
| | - Haifeng Shi
- Institute of Life Sciences, Jiangsu University
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10
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Wiese M, Stefan SM. The A‐B‐C of small‐molecule ABC transport protein modulators: From inhibition to activation—a case study of multidrug resistance‐associated protein 1 (ABCC1). Med Res Rev 2019; 39:2031-2081. [DOI: 10.1002/med.21573] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 02/26/2019] [Accepted: 03/05/2019] [Indexed: 12/17/2022]
Affiliation(s)
- Michael Wiese
- Pharmaceutical Institute, Rheinische Friedrich‐Wilhelms‐University of Bonn Bonn Germany
| | - Sven Marcel Stefan
- Pharmaceutical Institute, Rheinische Friedrich‐Wilhelms‐University of Bonn Bonn Germany
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11
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Wang S, Xu Z, Yin H, Min Y, Li S. Alleviation Mechanisms of Selenium on Cadmium-Spiked in Chicken Ovarian Tissue: Perspectives from Autophagy and Energy Metabolism. Biol Trace Elem Res 2018; 186:521-528. [PMID: 29679350 DOI: 10.1007/s12011-018-1341-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 04/09/2018] [Indexed: 01/27/2023]
Abstract
Cadmium (Cd) is a kind of toxic heavy metal and it can cause damage to organs and tissues. Selenium (Se) can antagonize some metal element toxicity including Cd. The present study was designed to investigate Cd-induced damage to chicken ovary by autophagy and the protective mechanism of Se on Cd-induced damage. Administration of Cd for 12 weeks led to energy metabolism disorder of the chicken ovarian tissues, which resulted in autophagy. In addition, the mRNA expression of glucose-related genes including hexokinase II (HK2), pyruvate kinase (PK), pyruvate dehydrogenase complex (PDHX), and succinate dehydrogenase (SDH) and the activities of ATPase, including Na+-K+-ATPase, Ca2+-ATPase, Mg2+-ATPase, were all downregulated remarkably compared with the control. However, combined with oral administration of Se at 2 mg/kg, the mRNA expression of glucose-related genes and the activities of ATPase increased. The mRNA expression of the autophagy-related genes by Cd treatment, including microtubule-associated protein light chain 3 (LC3), dynein, autophagy-related gene 5 (Atg5), and Beclin 1, was remarkably enhanced, whereas mammalian target of rapamycin (mTOR) was downregulated. However, besides mTOR, their levels displayed a downregulated trend beyond simultaneous Se treatment. The protein expression of autophagy genes was similar to those of mRNA. In conclusion, Cd toxicity affect energy metabolism and induce autophagy, which causes damage to chicken ovary, whereas Se could protect effectively this injury induced by Cd.
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Affiliation(s)
- Shuang Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Zhe Xu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Hang Yin
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Yahong Min
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
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12
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Gu J, Dai S, Liu Y, Liu H, Zhang Y, Ji X, Yu F, Zhou Y, Chen L, Tse WKF, Wong CKC, Chen B, Shi H. Activation of Ca 2+-sensing receptor as a protective pathway to reduce Cadmium-induced cytotoxicity in renal proximal tubular cells. Sci Rep 2018; 8:1092. [PMID: 29348484 PMCID: PMC5773512 DOI: 10.1038/s41598-018-19327-9] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 12/27/2017] [Indexed: 01/16/2023] Open
Abstract
Cadmium (Cd), as an extremely toxic metal could accumulate in kidney and induce renal injury. Previous studies have proved that Cd impact on renal cell proliferation, autophagy and apoptosis, but the detoxification drugs and the functional mechanism are still in study. In this study, we used mouse renal tubular epithelial cells (mRTECs) to clarify Cd-induced toxicity and signaling pathways. Moreover, we proposed to elucidate the prevent effect of activation of Ca2+ sensing receptor (CaSR) by Calcimimetic (R-467) on Cd-induced cytotoxicity and underlying mechanisms. Cd induced intracellular Ca2+ elevation through phospholipase C-inositol 1, 4, 5-trisphosphate (PLC) followed stimulating p38 mitogen-activated protein kinases (MAPK) activation and suppressing extracellular signal-regulated kinase (ERK) activation, which leaded to increase apoptotic cell death and inhibit cell proliferation. Cd induced p38 activation also contribute to autophagic flux inhibition that aggravated Cd induced apoptosis. R-467 reinstated Cd-induced elevation of intracellular Ca2+ and apoptosis, and it also increased cell proliferation and restored autophagic flux by switching p38 to ERK pathway. The identification of the activation of CaSR-mediated protective pathway in renal cells sheds light on a possible cellular protective mechanism against Cd-induced kidney injury.
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Affiliation(s)
- Jie Gu
- Institute of Life Science, Jiangsu University, Zhenjiang, Jiangsu, 212000, China
| | - Shuya Dai
- Institute of Life Science, Jiangsu University, Zhenjiang, Jiangsu, 212000, China
| | - Yanmin Liu
- Institute of Life Science, Jiangsu University, Zhenjiang, Jiangsu, 212000, China
| | - Haitao Liu
- Institute of Life Science, Jiangsu University, Zhenjiang, Jiangsu, 212000, China
| | - Yao Zhang
- Medical Section, The Third Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu, 212000, China
| | - Xingqi Ji
- Institute of Life Science, Jiangsu University, Zhenjiang, Jiangsu, 212000, China
| | - Feng Yu
- Institute of Life Science, Jiangsu University, Zhenjiang, Jiangsu, 212000, China
| | - Yang Zhou
- Institute of Life Science, Jiangsu University, Zhenjiang, Jiangsu, 212000, China
| | - Liang Chen
- Institute of Life Science, Jiangsu University, Zhenjiang, Jiangsu, 212000, China
| | | | - Chris Kong Chu Wong
- Department of Biology, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Binghai Chen
- Department of urology, Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu, 212000, China
| | - Haifeng Shi
- Institute of Life Science, Jiangsu University, Zhenjiang, Jiangsu, 212000, China.
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Zhao H, Li Q, Pang J, Jin H, Li H, Yang X. Blocking autophagy enhances the pro-apoptotic effect of bufalin on human gastric cancer cells through endoplasmic reticulum stress. Biol Open 2017; 6:1416-1422. [PMID: 28838965 PMCID: PMC5665466 DOI: 10.1242/bio.026344] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Bufalin has been used to treat cancer for several years. However, the molecular mechanisms for its anti-tumor function are not fully understood. This work aimed to investigate the effect of bufalin on the proliferation and apoptosis of human gastric cancer (HGC) cells and the roles of endoplasmic reticulum (ER) stress and autophagy in bufalin-induced apoptosis. HGC cell lines, SGC7901 and BGC823, were treated with different concentrations of bufalin or 80 nmol/l bufalin for 1, 2, 3 and 4 days. Cell counting kit-8 (CCK-8) assay and direct cell counting method were used to detect proliferation. Cell cycle arrest and apoptosis was detected using flow cytometry. Protein levels of caspase-3, -8, Bax/Bcl-2, Beclin-1, LC3, inositol-requiring enzyme 1 (IRE1) and C/EBP homologous protein (CHOP) were determined using western blotting. Autophagy was blocked using 3-methyladenine (3MA) or Atg5 siRNA to evaluate the effect of autophagy on bufalin-induced apoptosis. The IRE1 and CHOP were knocked down using specific siRNA to determine the pathway involved in bufalin-induced autophagy. It was found that bufalin significantly suppressed proliferation of SGC7901 and BGC823 cells and induced apoptosis in a time- and dose-dependent manner. The mechanism responsible for bufalin-induced apoptosis was the formation of ER stress via the IRE1-JNK pathway. Moreover, autophagy was activated during ER stress, and blocking autophagy significantly exacerbated bufalin-induced apoptosis. Summary: Bufalin suppressed human gastric cancer cells and induced apoptosis. The mechanism was related to ER stress formation via the IRE1-JNK pathway. Blocking autophagy exacerbated bufalin-induced apoptosis.
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Affiliation(s)
- Hongyan Zhao
- Department of Gastroenterology, the Fourth Affiliated Hospital of Harbin Medical University, Harbin 150001, China .,Department of Gastroenterology, the Fourth Hospital of Harbin, Harbin 150026, China
| | - Qinghua Li
- Department of Hepatology and Pancreatology, Shanghai East Hospital, Tongji University, Shanghai 200120, China
| | - Jie Pang
- Pharmacy, the Fifth Hospital of Harbin, Harbin 150000, China
| | - Huilin Jin
- Department of Gastroenterology, the Fourth Hospital of Harbin, Harbin 150026, China
| | - Hongwei Li
- Department of Gastroenterology, the Fourth Hospital of Harbin, Harbin 150026, China
| | - Xiaoying Yang
- Department of Gastroenterology, the Fourth Hospital of Harbin, Harbin 150026, China
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Kim J, Song H, Heo HR, Kim JW, Kim HR, Hong Y, Yang SR, Han SS, Lee SJ, Kim WJ, Hong SH. Cadmium-induced ER stress and inflammation are mediated through C/EBP-DDIT3 signaling in human bronchial epithelial cells. Exp Mol Med 2017; 49:e372. [PMID: 28860664 PMCID: PMC5628270 DOI: 10.1038/emm.2017.125] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Revised: 03/28/2017] [Accepted: 03/29/2017] [Indexed: 02/07/2023] Open
Abstract
Cadmium (Cd), a major component of cigarette smoke, disrupts the normal functions of airway cells and can lead to the development of various pulmonary diseases such as chronic obstructive pulmonary disease (COPD). However, the molecular mechanisms involved in Cd-induced pulmonary diseases are poorly understood. Here, we identified a cluster of genes that are altered in response to Cd exposure in human bronchial epithelial cells (BEAS-2B) and demonstrated that Cd-induced ER stress and inflammation are mediated via CCAAT-enhancer-binding proteins (C/EBP)-DNA-damaged-inducible transcript 3 (DDIT3) signaling in BEAS-2B cells. Cd treatment led to marked upregulation and downregulation of genes associated with the cell cycle, apoptosis, oxidative stress and inflammation as well as various signal transduction pathways. Gene set enrichment analysis revealed that Cd treatment stimulated the C/EBP signaling pathway and induced transcriptional activation of its downstream target genes, including DDIT3. Suppression of DDIT3 expression using specific small interfering RNA effectively alleviated Cd-induced ER stress and inflammatory responses in both BEAS-2B and normal primary normal human bronchial epithelial cells. Taken together, these data suggest that C/EBP signaling may have a pivotal role in the early induction of ER stress and inflammatory responses by Cd exposure and could be a molecular target for Cd-induced pulmonary disease.
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Affiliation(s)
- Jeeyoung Kim
- Department of Internal Medicine, School of Medicine, Kangwon National University, Chuncheon, South Korea.,Environmental Health Center, Kangwon National University Hospital, Chuncheon, South Korea
| | - Haengseok Song
- Department of Biomedical Science, College of Life Science, CHA University, Seongnam, South Korea
| | - Hye-Ryeon Heo
- Department of Internal Medicine, School of Medicine, Kangwon National University, Chuncheon, South Korea.,Environmental Health Center, Kangwon National University Hospital, Chuncheon, South Korea
| | - Jung Woon Kim
- Department of Internal Medicine, School of Medicine, Kangwon National University, Chuncheon, South Korea.,Environmental Health Center, Kangwon National University Hospital, Chuncheon, South Korea
| | - Hye-Ryun Kim
- Department of Biomedical Science, College of Life Science, CHA University, Seongnam, South Korea
| | - Yoonki Hong
- Department of Internal Medicine, School of Medicine, Kangwon National University, Chuncheon, South Korea.,Environmental Health Center, Kangwon National University Hospital, Chuncheon, South Korea
| | - Se-Ran Yang
- Department of Thoracic and Cardiovascular Surgery, School of Medicine, Kangwon National University, Chuncheon, South Korea
| | - Seon-Sook Han
- Department of Internal Medicine, School of Medicine, Kangwon National University, Chuncheon, South Korea.,Environmental Health Center, Kangwon National University Hospital, Chuncheon, South Korea
| | - Seung-Joon Lee
- Department of Internal Medicine, School of Medicine, Kangwon National University, Chuncheon, South Korea.,Environmental Health Center, Kangwon National University Hospital, Chuncheon, South Korea
| | - Woo Jin Kim
- Department of Internal Medicine, School of Medicine, Kangwon National University, Chuncheon, South Korea.,Environmental Health Center, Kangwon National University Hospital, Chuncheon, South Korea
| | - Seok-Ho Hong
- Department of Internal Medicine, School of Medicine, Kangwon National University, Chuncheon, South Korea.,Environmental Health Center, Kangwon National University Hospital, Chuncheon, South Korea
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15
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Gong B, Nie W, Yan Y, Gao Z, Shi Q. Unravelling cadmium toxicity and nitric oxide induced tolerance in Cucumis sativus : Insight into regulatory mechanisms using proteomics. JOURNAL OF HAZARDOUS MATERIALS 2017; 336:202-213. [PMID: 0 DOI: 10.1016/j.jhazmat.2017.04.058] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2017] [Revised: 04/20/2017] [Accepted: 04/21/2017] [Indexed: 05/08/2023]
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16
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Zhang P, Zheng Z, Ling L, Yang X, Zhang N, Wang X, Hu M, Xia Y, Ma Y, Yang H, Wang Y, Liu H. w09, a novel autophagy enhancer, induces autophagy-dependent cell apoptosis via activation of the EGFR-mediated RAS-RAF1-MAP2K-MAPK1/3 pathway. Autophagy 2017; 13:1093-1112. [PMID: 28513279 DOI: 10.1080/15548627.2017.1319039] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The EGFR (epidermal growth factor receptor) signaling pathway is frequently deregulated in many malignancies. Therefore, targeting the EGFR pathway is regarded as a promising strategy for anticancer drug discovery. Herein, we identified a 2-amino-nicotinonitrile compound (w09) as a novel autophagy enhancer, which potently induced macroautophagy/autophagy and consequent apoptosis in gastric cancer cells. Mechanistic studies revealed that EGFR-mediated activation of the RAS-RAF1-MAP2K-MAPK1/3 signaling pathway played a critical role in w09-induced autophagy and apoptosis of gastric cancer cells. Inhibition of the MAPK1/3 pathway with U0126 or blockade of autophagy by specific chemical inhibitors markedly attenuated the effect of w09-mediated growth inhibition and caspase-dependent apoptosis. Furthermore, these conclusions were supported by knockdown of ATG5 or knockout of ATG5 and/or ATG7. Notably, w09 increased the expression of SQSTM1 by transcription, and knockout of SQSTM1 or deleting the LC3-interaction region domain of SQSTM1, significantly inhibited w09-induced PARP1 cleavage, suggesting the central role played by SQSTM1 in w09-induced apoptosis. In addition, in vivo administration of w09 effectively inhibited tumor growth of SGC-7901 xenografts. Hence, our findings not only suggested that activation of the EGFR-RAS-RAF1-MAP2K-MAPK1/3 signaling pathway may play a critical role in w09-induced autophagy and apoptosis, but also imply that induction of autophagic cancer cell death through activation of the EGFR pathway may be a potential therapeutic strategy for EGFR-disregulated gastric tumors.
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Affiliation(s)
- Pinghu Zhang
- a Jiangsu Key Laboratory of New Drug Screening & Jiangsu Center for Pharmacodynamics Research and Evaluation & National Nanjing Center for Drug Screening & State Key Laboratory of Natural Medicines, China Pharmaceutical University , Nanjing , China
| | - Zuguo Zheng
- a Jiangsu Key Laboratory of New Drug Screening & Jiangsu Center for Pharmacodynamics Research and Evaluation & National Nanjing Center for Drug Screening & State Key Laboratory of Natural Medicines, China Pharmaceutical University , Nanjing , China
| | - Li Ling
- a Jiangsu Key Laboratory of New Drug Screening & Jiangsu Center for Pharmacodynamics Research and Evaluation & National Nanjing Center for Drug Screening & State Key Laboratory of Natural Medicines, China Pharmaceutical University , Nanjing , China
| | - Xiaohui Yang
- b Institute of Chemical Industry of Forestry Products, CAF, National Engineering Laboratory for Biomass Chemical Utilization & Key Laboratory of Forest Chemical Engineering, SFA & Key Lab. of Biomass Energy and Material , Nanjing , China
| | - Ni Zhang
- a Jiangsu Key Laboratory of New Drug Screening & Jiangsu Center for Pharmacodynamics Research and Evaluation & National Nanjing Center for Drug Screening & State Key Laboratory of Natural Medicines, China Pharmaceutical University , Nanjing , China
| | - Xue Wang
- a Jiangsu Key Laboratory of New Drug Screening & Jiangsu Center for Pharmacodynamics Research and Evaluation & National Nanjing Center for Drug Screening & State Key Laboratory of Natural Medicines, China Pharmaceutical University , Nanjing , China
| | | | - Yu Xia
- a Jiangsu Key Laboratory of New Drug Screening & Jiangsu Center for Pharmacodynamics Research and Evaluation & National Nanjing Center for Drug Screening & State Key Laboratory of Natural Medicines, China Pharmaceutical University , Nanjing , China
| | - Yiwen Ma
- a Jiangsu Key Laboratory of New Drug Screening & Jiangsu Center for Pharmacodynamics Research and Evaluation & National Nanjing Center for Drug Screening & State Key Laboratory of Natural Medicines, China Pharmaceutical University , Nanjing , China
| | - Haoran Yang
- a Jiangsu Key Laboratory of New Drug Screening & Jiangsu Center for Pharmacodynamics Research and Evaluation & National Nanjing Center for Drug Screening & State Key Laboratory of Natural Medicines, China Pharmaceutical University , Nanjing , China
| | - Yunyi Wang
- a Jiangsu Key Laboratory of New Drug Screening & Jiangsu Center for Pharmacodynamics Research and Evaluation & National Nanjing Center for Drug Screening & State Key Laboratory of Natural Medicines, China Pharmaceutical University , Nanjing , China
| | - Hongqi Liu
- d Infection and Immunity Laboratory, Institute of Medical Biology , Kunming National High-level Biosafety Primate Research Center, Chinese Academy of Medical Science & Peking Union of Medical School , Kunming , China
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Ou Z, Chen Y, Niu X, He W, Song B, Fan D, Sun X. High-mobility group box 1 regulates cytoprotective autophagy in a mouse spermatocyte cell line (GC-2spd) exposed to cadmium. Ir J Med Sci 2017; 186:1041-1050. [PMID: 28389990 DOI: 10.1007/s11845-017-1595-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 03/14/2017] [Indexed: 11/29/2022]
Abstract
BACKGROUND Cadmium (Cd) is an environmental and industrial pollutant that induces a broad spectrum of toxicological effects, influences a variety of human organs, and is associated with poor semen quality and male infertility. Increasing evidence demonstrates that Cd induces testicular germ cell apoptosis in rodent animals. However, the specific effect of Cd exposure on autophagy in germ cells is poorly understood. METHODS We investigate the role of high-mobility group box 1 protein (HMGB1), a ubiquitous nuclear protein, on Cd-evoked autophagy in a mouse spermatocyte cell line (GC-2spd). RESULTS Our data have shown that autophagy was significantly elevated in GC-2spd cells exposed to Cd. Furthermore, there was a reduction in rapamycin (RAP)-mediated apoptosis. In addition, Cd exposure reduced cell viability, which is an effect that could be significantly inhibited by RAP treatment. These results indicate that autophagy appears to serve a positive function in reducing Cd-induced cytotoxicity. In addition, HMGB1 increased coincident with the processing of LC3-I to LC3-II. Thus, the upregulation of HMGB1 increases LC3-II levels. CONCLUSIONS Our data suggest that HMGB1-induced autophagy appears to act as a defense/survival mechanism against Cd cytotoxicity in GC-2spd cells.
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Affiliation(s)
- Z Ou
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, People's Republic of China
| | - Y Chen
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, People's Republic of China
| | - X Niu
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, People's Republic of China
| | - W He
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, People's Republic of China
| | - B Song
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, People's Republic of China
| | - D Fan
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, People's Republic of China
| | - X Sun
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, People's Republic of China.
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Wang M, Huang C, Su Y, Yang C, Xia Q, Xu DJ. Astragaloside II sensitizes human hepatocellular carcinoma cells to 5-fluorouracil via suppression of autophagy. ACTA ACUST UNITED AC 2017; 69:743-752. [PMID: 28266023 DOI: 10.1111/jphp.12706] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Accepted: 01/12/2017] [Indexed: 12/17/2022]
Abstract
OBJECTIVES Inhibition of autophagy has been increasingly recognized as a potential therapeutic approach against cancer. Our previous reports showed that Astragaloside II improves hepatic cancer cells resistance by downregulating MDR1 and P-gp .The purpose of this study was to further investigated the effect of autophagy on AS-II reversing multidrug resistance and its molecular mechanism in hepatocellular carcinoma cells in vitro. METHODS Bel-7402 and Bel-7402/FU cell lines were used in this study. Western blot was used to detect the expression of autophagy-related protein, p-mTOR and p-p79s6k, MTT was used to analyse cell viability, GFP-LC3 punctate dots distribution was observed by GFP-LC3 transient transfection under fluorescence microscopy and silencing of autophagy-related genes was detected by small interfering RNA transfection. KEY FINDINGS Astragaloside II was able to significantly decrease the expression of LC3-II and Beclin-1 in a dose-dependent manner, Astragaloside II (80 μm) further decreased LC3-II formation, Beclin-1 and GFP-LC3 puncta dots stimulated with 5-fluorouracil (0.2 mm) in Bel-7402/FU cells (P < 0.05). In addition, Astragaloside II is capable of sensitizing cells to 5-fluorouracil-induced cell death via inhibition of pro-survival autophagy involvement of MAPK-mTOR pathway. CONCLUSIONS These findings suggested that Astragaloside II could suppress autophagy by interfering with Beclin-1 and LC3 via MAPK-mTOR pathway, through which sensitized human cancer resistant cells to 5-FU-induced cell death.
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Affiliation(s)
- Meng Wang
- Department of Pharmacy, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Can Huang
- Department of Pharmacy, Affiliated Anqing Hospital of Anhui Medical University, Anqing, Anhui, China
| | - Yong Su
- Department of Pharmacy, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Cui Yang
- Department of Pharmacy, The Fourth Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Quan Xia
- Department of Pharmacy, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Du-Juan Xu
- Department of Pharmacy, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
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19
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Pereira LC, Duarte FV, Varela ATIF, Rolo AP, Palmeira CMM, Dorta DJ. An autophagic process is activated in HepG2 cells to mediate BDE-100-induced toxicity. Toxicology 2017; 376:59-65. [DOI: 10.1016/j.tox.2016.05.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Revised: 05/13/2016] [Accepted: 05/24/2016] [Indexed: 12/12/2022]
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20
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Pierrefite-Carle V, Santucci-Darmanin S, Breuil V, Gritsaenko T, Vidaud C, Creff G, Solari PL, Pagnotta S, Al-Sahlanee R, Auwer CD, Carle GF. Effect of natural uranium on the UMR-106 osteoblastic cell line: impairment of the autophagic process as an underlying mechanism of uranium toxicity. Arch Toxicol 2016; 91:1903-1914. [DOI: 10.1007/s00204-016-1833-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 08/24/2016] [Indexed: 01/07/2023]
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21
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Chen M, Yin H, Bai P, Miao P, Deng X, Xu Y, Hu J, Yin J. ABC transporters affect the elimination and toxicity of CdTe quantum dots in liver and kidney cells. Toxicol Appl Pharmacol 2016; 303:11-20. [DOI: 10.1016/j.taap.2016.04.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 04/04/2016] [Accepted: 04/26/2016] [Indexed: 12/26/2022]
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22
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Thanee M, Loilome W, Techasen A, Sugihara E, Okazaki S, Abe S, Ueda S, Masuko T, Namwat N, Khuntikeo N, Titapun A, Pairojkul C, Saya H, Yongvanit P. CD44 variant-dependent redox status regulation in liver fluke-associated cholangiocarcinoma: A target for cholangiocarcinoma treatment. Cancer Sci 2016; 107:991-1000. [PMID: 27176078 PMCID: PMC4946726 DOI: 10.1111/cas.12967] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 05/04/2016] [Accepted: 05/11/2016] [Indexed: 12/13/2022] Open
Abstract
Expression of CD44, especially the variant isoforms (CD44v) of this major cancer stem cell marker, contributes to reactive oxygen species (ROS) defense through stabilizing xCT (a cystine–glutamate transporter) and promoting glutathione synthesis. This enhances cancer development and increases chemotherapy resistance. We investigate the role of CD44v in the regulation of the ROS defense system in cholangiocarcinoma (CCA). Immunohistochemical staining of CD44v and p38MAPK (a major ROS target) expression in Opisthorchis viverrini‐induced hamster CCA tissues (at 60, 90, 120, and 180 days) reveals a decreased phospho‐p38MAPK signal, whereas the CD44v signal was increased during bile duct transformation. Patients with CCA showed CD44v overexpression and negative‐phospho‐p38MAPK patients a significantly shorter survival rate than the low CD44v signal and positive‐phospho‐p38MAPK patients (P = 0.030). Knockdown of CD44 showed that xCT and glutathione levels were decreased, leading to a high level of ROS. We examined xCT‐targeted CD44v cancer stem cell therapy using sulfasalazine. Glutathione decreased and ROS increased after the treatment, leading to inhibition of cell proliferation and induction of cell death. Thus, the accumulation of CD44v leads to the suppression of p38MAPK in transforming bile duct cells. The redox status regulation of CCA cells depends on the expression of CD44v to contribute the xCT function and is a link to the poor prognosis of patients. Thus, an xCT inhibitor could inhibit cell growth and activate cell death. This suggests that an xCT‐targeting drug may improve CCA therapy by sensitization to the available drug (e.g. gemcitabine) by blocking the mechanism of the cell's ROS defensive system.
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Affiliation(s)
- Malinee Thanee
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Liver Fluke and Cholangiocarcinoma Research Center, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Watcharin Loilome
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Liver Fluke and Cholangiocarcinoma Research Center, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Anchalee Techasen
- Liver Fluke and Cholangiocarcinoma Research Center, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Eiji Sugihara
- Division of Gene Regulation, Institute for Advanced Medical Research, School of Medicine, Keio University, Tokyo, Japan
| | - Shogo Okazaki
- Division of Gene Regulation, Institute for Advanced Medical Research, School of Medicine, Keio University, Tokyo, Japan
| | - Shinya Abe
- Cell Biology Laboratory, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashiosaka, Japan.,Laboratory of Biological Protection, Department of Biological Responses, Institute for Virus Research, Kyoto University, Kyoto, Japan
| | - Shiho Ueda
- Cell Biology Laboratory, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashiosaka, Japan
| | - Takashi Masuko
- Cell Biology Laboratory, Department of Pharmaceutical Sciences, Faculty of Pharmacy, Kindai University, Higashiosaka, Japan
| | - Nisana Namwat
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Liver Fluke and Cholangiocarcinoma Research Center, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Narong Khuntikeo
- Liver Fluke and Cholangiocarcinoma Research Center, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Department of Surgery, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Attapol Titapun
- Liver Fluke and Cholangiocarcinoma Research Center, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Department of Surgery, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Chawalit Pairojkul
- Liver Fluke and Cholangiocarcinoma Research Center, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Department of Pathology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Hideyuki Saya
- Division of Gene Regulation, Institute for Advanced Medical Research, School of Medicine, Keio University, Tokyo, Japan
| | - Puangrat Yongvanit
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Liver Fluke and Cholangiocarcinoma Research Center, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
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23
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Zhang Z, Miah M, Culbreth M, Aschner M. Autophagy in Neurodegenerative Diseases and Metal Neurotoxicity. Neurochem Res 2016; 41:409-22. [PMID: 26869037 DOI: 10.1007/s11064-016-1844-x] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 01/20/2016] [Accepted: 01/22/2016] [Indexed: 02/07/2023]
Abstract
Autophagy generally refers to cell catabolic and recycling process in which cytoplasmic components are delivered to lysosomes for degradation. During the last two decades, autophagy research has experienced a recent boom because of a newfound connection between this process and many human diseases. Autophagy plays a significant role in maintaining cellular homeostasis and protects cells from varying insults, including misfolded and aggregated proteins and damaged organelles, which is particularly crucial in neuronal survival. Mounting evidence has implicated autophagic dysfunction in the pathogenesis of several major neurodegenerative disorders, such as Parkinson's disease, Alzheimer's disease and Huntington's disease, where deficient elimination of abnormal and toxic protein aggregates promotes cellular stress, failure and death. In addition, autophagy has also been found to affect neurotoxicity induced by exposure to essential metals, such as manganese, copper, and iron, and other heavy metals, such as cadmium, lead, and methylmercury. This review examines current literature on the role of autophagy in the mechanisms of disease pathogenesis amongst common neurodegenerative disorders and of metal-induced neurotoxicity.
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Affiliation(s)
- Ziyan Zhang
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Forchheimer 209, Bronx, NY, 10461, USA
| | - Mahfuzur Miah
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Forchheimer 209, Bronx, NY, 10461, USA
| | - Megan Culbreth
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Forchheimer 209, Bronx, NY, 10461, USA
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Forchheimer 209, Bronx, NY, 10461, USA.
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24
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Sandbichler AM, Höckner M. Cadmium Protection Strategies--A Hidden Trade-Off? Int J Mol Sci 2016; 17:ijms17010139. [PMID: 26805823 PMCID: PMC4730378 DOI: 10.3390/ijms17010139] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2015] [Revised: 01/15/2016] [Accepted: 01/18/2016] [Indexed: 12/12/2022] Open
Abstract
Cadmium (Cd) is a non-essential transition metal which is introduced into the biosphere by various anthropogenic activities. Environmental pollution with Cd poses a major health risk and Cd toxicity has been extensively researched over the past decades. This review aims at changing the perspective by discussing protection mechanisms available to counteract a Cd insult. Antioxidants, induction of antioxidant enzymes, and complexation of Cd to glutathione (GSH) and metallothionein (MT) are the most potent protective measures to cope with Cd-induced oxidative stress. Furthermore, protection mechanisms include prevention of endoplasmic reticulum (ER) stress, mitophagy and metabolic stress, as well as expression of chaperones. Pre-exposure to Cd itself, or co-exposure to other metals or trace elements can improve viability under Cd exposure and cells have means to reduce Cd uptake and improve Cd removal. Finally, environmental factors have negative or positive effects on Cd toxicity. Most protection mechanisms aim at preventing cellular damage. However, this might not be possible without trade-offs like an increased risk of carcinogenesis.
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Affiliation(s)
| | - Martina Höckner
- University of Innsbruck, Institute of Zoology, Technikerstraße 25, 6020 Innsbruck, Austria.
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25
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Prolyl isomerase Pin1 regulates cadmium-induced autophagy via ubiquitin-mediated post-translational stabilization of phospho-Ser GSK3αβ in human hepatocellular carcinoma cells. Biochem Pharmacol 2015; 98:511-21. [DOI: 10.1016/j.bcp.2015.09.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 09/08/2015] [Indexed: 11/22/2022]
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26
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Surolia R, Karki S, Kim H, Yu Z, Kulkarni T, Mirov SB, Carter AB, Rowe SM, Matalon S, Thannickal VJ, Agarwal A, Antony VB. Heme oxygenase-1-mediated autophagy protects against pulmonary endothelial cell death and development of emphysema in cadmium-treated mice. Am J Physiol Lung Cell Mol Physiol 2015; 309:L280-92. [PMID: 26071551 DOI: 10.1152/ajplung.00097.2015] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Accepted: 06/02/2015] [Indexed: 12/27/2022] Open
Abstract
Pulmonary exposure to cadmium, a major component of cigarette smoke, has a dramatic impact on lung function and the development of emphysema. Cigarette smoke exposure induces heme oxygenase-1 (HO-1), a cytoprotective enzyme. In this study, we employed a truncated mouse model of emphysema by intratracheal instillation of cadmium (CdCl2) solution (0.025% per 1 mg/kg body wt) in HO-1(+/+), HO-1(-/-), and overexpressing humanized HO-1 bacterial artificial chromosome (hHO-1BAC) mice. We evaluated the role of HO-1 in cadmium-induced emphysema in mice by analyzing histopathology, micro-computed tomography scans, and lung function tests. CdCl2-exposed HO-1(-/-) mice exhibited more severe emphysema compared with HO-1(+/+) or hHO-1BAC mice. Loss of pulmonary endothelial cells (PECs) from the alveolar capillary membrane is recognized to be a target in emphysema. PECs from HO-1(+/+), HO-1(-/-), and hHO-1BAC were employed to define the underlying molecular mechanism for the protection from emphysema by HO-1. Electron microscopy, expression of autophagic markers (microtubule-associated protein 1B-light chain 3 II, autophagy protein 5, and Beclin1) and apoptotic marker (cleaved caspase 3) suggested induction of autophagy and apoptosis in PECs after CdCl2 treatment. CdCl2-treated HO-1(-/-) PECs exhibited downregulation of autophagic markers and significantly increased cleaved caspase 3 expression and activity (∼4-fold higher). Moreover, hHO-1BAC PECs demonstrated upregulated autophagy and absence of cleaved caspase 3 expression or activity. Pretreatment of HO-1(+/+) PECs with rapamycin induced autophagy and resulted in reduced cell death upon cadmium treatment. Induction of autophagy following CdCl2 treatment was found to be protective from apoptotic cell death. HO-1 induced protective autophagy in PECs and mitigated cadmium-induced emphysema.
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Affiliation(s)
- Ranu Surolia
- Division of Pulmonary, Allergy and Critical Care, Department of Medicine, University of Alabama at Birmingham, Alabama
| | - Suman Karki
- Division of Pulmonary, Allergy and Critical Care, Department of Medicine, University of Alabama at Birmingham, Alabama
| | - Hyunki Kim
- Department of Radiology, University of Alabama at Birmingham, Alabama
| | - Zhihong Yu
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Alabama
| | - Tejaswini Kulkarni
- Division of Pulmonary, Allergy and Critical Care, Department of Medicine, University of Alabama at Birmingham, Alabama
| | - Sergey B Mirov
- Department of Physics, University of Alabama at Birmingham, Alabama
| | - A Brent Carter
- Division of Pulmonary, Allergy and Critical Care, Department of Medicine, University of Alabama at Birmingham, Alabama; Veterans Affairs Medical Center, University of Alabama at Birmingham, Alabama
| | - Steven M Rowe
- Division of Pulmonary, Allergy and Critical Care, Department of Medicine, University of Alabama at Birmingham, Alabama; Department of Pediatrics, University of Alabama at Birmingham, Alabama; Department of Cell Development and Integrative Biology, University of Alabama at Birmingham, Alabama
| | - Sadis Matalon
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Alabama
| | - Victor J Thannickal
- Division of Pulmonary, Allergy and Critical Care, Department of Medicine, University of Alabama at Birmingham, Alabama
| | - Anupam Agarwal
- Division of Nephrology Department of Medicine, University of Alabama at Birmingham, Alabama; Veterans Affairs Medical Center, University of Alabama at Birmingham, Alabama
| | - Veena B Antony
- Division of Pulmonary, Allergy and Critical Care, Department of Medicine, University of Alabama at Birmingham, Alabama;
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27
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WANG QIWEN, WANG YI, WANG TAO, ZHANG KANGBAO, JIANG CHENGYANG, HU FEIFEI, YUAN YAN, BIAN JIANCHUN, LIU XUEZHONG, GU JIANHONG, LIU ZONGPING. Cadmium-induced autophagy promotes survival of rat cerebral cortical neurons by activating class III phosphoinositide 3-kinase/beclin-1/B-cell lymphoma 2 signaling pathways. Mol Med Rep 2015; 12:2912-8. [DOI: 10.3892/mmr.2015.3755] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 04/10/2015] [Indexed: 11/06/2022] Open
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28
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Jung KT, Kim HR, Lee BH, Kim SH, So KY, An TH, Lee HY, Oh SH. Differential effects of p38 and JNK activation by GSK3 on cadmium-induced autophagy and apoptosis. Toxicol Res (Camb) 2015. [DOI: 10.1039/c5tx00007f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
A proposed schematic model of the roles of p38 and JNK MAPK activation in the regulation of Cd-induced autophagy through site-specific phosphorylation in serine and tyrosine residues of GSK3αβ.
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Affiliation(s)
- Ki-Tae Jung
- Department of Anesthesiology and Pain Medicine
- College of Medicine
- Chosun University
- Gwangju 501-759
- Korea
| | - Hak-Ryul Kim
- Department of Internal Medicine
- Wonkwang University
- School of Medicine
- Iksan 570-749
- Korea
| | - Byung-Hoon Lee
- College of Pharmacy and Research Institute of Pharmaceutical Sciences
- Seoul National University
- Seoul 151-742
- Korea
| | - Seong-Hwan Kim
- Department of Surgery
- College of Medicine
- Chosun University
- Gwangju 501-759
- Korea
| | - Keum-Young So
- Department of Anesthesiology and Pain Medicine
- College of Medicine
- Chosun University
- Gwangju 501-759
- Korea
| | - Tae-Hun An
- Department of Anesthesiology and Pain Medicine
- College of Medicine
- Chosun University
- Gwangju 501-759
- Korea
| | - Hyun-Young Lee
- Department of Anesthesiology and Pain Medicine
- College of Medicine
- Chosun University
- Gwangju 501-759
- Korea
| | - Seon-Hee Oh
- Department of Premedicine
- College of Medicine
- Chosun University
- Gwangju 501-759
- Korea
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29
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Affiliation(s)
- Sarmishtha Chatterjee
- Environmental Toxicology
Laboratory, Department of Zoology, Centre for Advanced Studies, Visva-Bharati University, Santiniketan 731235, West Bengal, India
| | - Shuvasree Sarkar
- Environmental Toxicology
Laboratory, Department of Zoology, Centre for Advanced Studies, Visva-Bharati University, Santiniketan 731235, West Bengal, India
| | - Shelley Bhattacharya
- Environmental Toxicology
Laboratory, Department of Zoology, Centre for Advanced Studies, Visva-Bharati University, Santiniketan 731235, West Bengal, India
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30
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Transcriptional regulation, stabilization, and subcellular redistribution of multidrug resistance-associated protein 1 (MRP1) by glycogen synthase kinase 3αβ: novel insights on modes of cadmium-induced cell death stimulated by MRP1. Arch Toxicol 2014; 89:1271-84. [PMID: 25273023 DOI: 10.1007/s00204-014-1381-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2014] [Accepted: 09/19/2014] [Indexed: 12/13/2022]
Abstract
Cadmium (Cd) resistance is associated with the suppression of autophagy in H460 lung cancer cells, which is regulated by phospho(p)serine-glycogen synthase kinase (GSK) 3αβ. However, the involvement of multidrug resistance (MDR) in this signaling pathway and its underlying mechanisms remain to be elucidated. In this study, we used Cd-resistant cells (RH460), developed from H460 lung cancer cells, to demonstrate that the induction of MDR-associated protein (MRP1) in response to Cd is enhanced in H460 cells compared to RH460. Treating RH460 cells with Cd induced large cytoplasmic vacuoles, which was inhibited by the autophagy inhibitor 3-methyladenine. MRP1 was detected in the nuclear-rich membrane fractions and redistributed from the perinuclear to the cytoplasmic compartment following exposure to Cd. Cd-induced MRP1, p-Ser/p-Tyr GSK3αβ, and LC3-II were all suppressed by the GSK3 inhibitor SB216763, but increased by lithium. Furthermore, MRP1 was upregulated by the Ser/Thr phosphatase inhibitor okadaic acid and downregulated by the tyrosine phosphatase inhibitor vanadate, suggesting that MRP1 protein was stabilized by p-Ser GSK3αβ. In addition, co-immunoprecipitation and co-localization analyzes revealed a physical interaction between MRP1 and p-Ser GSK3αβ. Genetic knockdown of GSK3β decreased Cd-induced MRP1 mRNA and protein levels, whereas its overexpression upregulated MRP1 protein expression. MRP1 also co-localized with lysosomal membrane protein-2, which may cause lysosomal membrane permeabilization and the subsequent release of cathepsins into the cytosol. In mice chronically injected with Cd, MRP1 localized to the perinuclear region of bronchial and alveolar epithelial cells. Collectively, these data suggest that Cd toxicity is regulated by the transcriptional regulation, stabilization, and subcellular redistribution of MRP1 via the posttranslational modification of GSK3αβ. Therefore, the serine phosphorylation of GSK3αβ plays a critical role in MRP1-induced cell death.
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31
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Hu F, Han J, Zhai B, Ming X, Zhuang L, Liu Y, Pan S, Liu T. Blocking autophagy enhances the apoptosis effect of bufalin on human hepatocellular carcinoma cells through endoplasmic reticulum stress and JNK activation. Apoptosis 2014; 19:210-23. [PMID: 24114361 DOI: 10.1007/s10495-013-0914-7] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Bufalin extracts are a part of traditional Chinese medicine, Chansu. In the current study, we investigated the effect of bufalin on the proliferation of the human hepatocellular carcinoma (HCC) cell lines, Huh-7 and HepG-2, and explored the therapeutic potential of the drug. Our results demonstrated that bufalin markedly inhibited cell proliferation and promoted apoptosis in the Huh-7 and HepG-2 cells in vitro. The underlying mechanism of the bufalin-induced apoptosis was the induction of endoplasmic reticulum (ER) stress via the IRE1-JNK pathway. In addition, during the ER stress response, the autophagy pathway, characterized by the conversion of LC3-I to LC3-II, was activated, resulting in increased Beclin-1 protein levels, decreased p62 expression and stimulation of autophagic flux. Our data supported the pro-survival role of bufalin-induced autophagy when the autophagy pathway was blocked with specific chemical inhibitors; the involvement of the IRE1 pathway in the ER stress-induced autophagy was also demonstrated when the expression of IRE1 and CHOP was silenced using siRNA. These data indicate that combining bufalin with a specific autophagy inhibitor could be a promising therapeutic approach for the treatment of HCC.
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Affiliation(s)
- Fengli Hu
- Department of Gastroenterology, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
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32
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Progesterone increases apoptosis and inversely decreases autophagy in human hepatoma HA22T/VGH cells treated with epirubicin. ScientificWorldJournal 2014; 2014:567148. [PMID: 24971383 PMCID: PMC4055367 DOI: 10.1155/2014/567148] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Accepted: 05/01/2014] [Indexed: 01/11/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is the leading cause of cancer-related deaths worldwide. Epirubicin can induce intracellular reactive oxygen species and is widely used to treat unresectable HCC. Progesterone has been found to inhibit the proliferation of hepatoma cells. This study was designed to test the combined effects of epirubicin and progesterone on human hepatoma cell line, HA22T/VGH. These cells were treated with different concentrations of epirubicin with or without the coaddition of 30 μM progesterone and then analyzed for apoptosis, autophagy, and expressions of apoptotic-related proteins and multidrug-resistant gene. Epirubicin treatment dose-dependently inhibited the growth of HA22T/VGH cells. Addition of 30 μM progesterone, which was inactive alone, augmented the effect of epirubicin on the inhibition of growth of HA22T/VGH cells. Cotreatment with progesterone enhanced epirubicin-induced apoptosis, as evidenced by greater increase in caspase-3 activity and in the ratio of the apoptosis-regulating protein, Bax/Bcl-XL. The combination also caused a decrease in autophagy and in the expression of multidrug resistance-related protein 1 mRNA compared to epirubicin alone. This study shows the epirubicin/progesterone combination was more effective in increasing apoptosis and inversely decreasing autophagy on HA22T/VGH cells treated with epirubicin alone, suggesting that this combination can potentially be used to treat HCC.
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33
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Gao D, Xu Z, Kuang X, Qiao P, Liu S, Zhang L, He P, Jadwiga WS, Wang Y, Min W. Molecular characterization and expression analysis of the autophagic gene beclin 1 from the purse red common carp (Cyprinus carpio) exposed to cadmium. Comp Biochem Physiol C Toxicol Pharmacol 2014; 160:15-22. [PMID: 24291087 DOI: 10.1016/j.cbpc.2013.11.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Revised: 10/22/2013] [Accepted: 11/20/2013] [Indexed: 12/14/2022]
Abstract
Beclin 1, the mammalian orthologue of yeast Atg6, has a central role in autophagy, which has been linked to diverse biological processes including immunity, development, tumor suppression, lifespan extension, etc. However, the relevant study about Beclin 1 is rare in fish compared with mammals. In this study, we isolated Beclin 1 gene from the kidney tissue of common carp (Cyprinus carpio) using rapid amplification of cDNA ends (RACE). The deduced amino acid sequence of cloned Beclin 1 comprised 447 amino acids, which showed approximately 80.7% identity and 88.9% similarity to human Beclin 1. It possessed a typical Bcl-2 homology domain 3 (BH3) and an evolutionarily conserved domain (ECD). Phylogenetic analysis demonstrated that common carp Beclin 1 formed a clade with zebrafish Beclin 1. To explore the relationship between Beclin 1 and cadmium (Cd)-induced injury, a Cd exposure experiment was conducted. The result showed that Cd content was significantly increased in a dose-dependent manner in kidney after Cd exposure. Swelling and vacuolation of renal tubular epithelial cells, and glomerular hyalinization were observed. Renal leukocyte infiltration was diffusely distributed in the interstitial tissue. Real-time quantitative RT-PCR analysis revealed that the mRNA transcript level of Beclin 1 was markedly up-regulated in a dose-dependent and time-dependent manner after exposure to Cd. Similarly, Western blot analysis indicated that its protein level was significantly elevated in a dose-dependent manner after Cd treatment. All the results indicate that the common carp Beclin 1 gene may play a regulatory role against Cd toxicity.
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Affiliation(s)
- Dian Gao
- Medical College of Nanchang University, Nanchang 330006, PR China; Institute of Immunotherapy, Nanchang University, Nanchang 330006, PR China.
| | - Zhen'e Xu
- Medical College of Nanchang University, Nanchang 330006, PR China; Institute of Immunotherapy, Nanchang University, Nanchang 330006, PR China
| | - Xiaodong Kuang
- Medical College of Nanchang University, Nanchang 330006, PR China
| | - Panpan Qiao
- Medical College of Nanchang University, Nanchang 330006, PR China
| | - Shen Liu
- Medical College of Nanchang University, Nanchang 330006, PR China
| | - Li Zhang
- Medical College of Nanchang University, Nanchang 330006, PR China
| | - Penghui He
- Medical College of Nanchang University, Nanchang 330006, PR China
| | | | - Yannan Wang
- Medical College of Nanchang University, Nanchang 330006, PR China
| | - Weiping Min
- Medical College of Nanchang University, Nanchang 330006, PR China; Institute of Immunotherapy, Nanchang University, Nanchang 330006, PR China; Jiangxi Academy of Medical Sciences, Nanchang 330006, PR China
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34
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Chiarelli R, Agnello M, Bosco L, Roccheri MC. Sea urchin embryos exposed to cadmium as an experimental model for studying the relationship between autophagy and apoptosis. MARINE ENVIRONMENTAL RESEARCH 2014; 93:47-55. [PMID: 23838188 DOI: 10.1016/j.marenvres.2013.06.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 05/06/2013] [Accepted: 06/19/2013] [Indexed: 06/02/2023]
Abstract
The sea urchin embryo is a suitable model that offers an excellent opportunity to investigate different defence strategies activated in stress conditions. We previously showed that cadmium accumulates in a dose- and time-dependent manner into embryonic cells, activating different stress and defence mechanisms, including the synthesis of HSPs and the onset of apoptosis and/or autophagy. In this paper we investigated the functional relationship between autophagy and apoptosis, evaluating apoptosis signals in cadmium-exposed Paracentrotus lividus embryos with inhibited autophagy. We found that the inhibition of autophagy produced the concurrent reduction of apoptosis, suggesting that the two phenomena are functionally related. Considering the catabolic role of autophagy, an energetic hypothesis to explain the relationship was evaluated. Using a substrate for ATP production, we found that apoptosis, assessed by TUNEL and cleaved caspase-3 immunocytochemistry, was substantially restored in cadmium-treated embryos where autophagy was inhibited by 3-Methyladenine. On the basis of these results, we propose that, autophagy could play a crucial role in stress response of this organism because autophagy could energetically contribute to apoptotic execution through its catabolic role.
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Affiliation(s)
- R Chiarelli
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche (STEBICEF), Università degli Studi di Palermo, Viale delle Scienze, Ed. 16, 90128 Palermo, Italy
| | - M Agnello
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche (STEBICEF), Università degli Studi di Palermo, Viale delle Scienze, Ed. 16, 90128 Palermo, Italy
| | - L Bosco
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche (STEBICEF), Università degli Studi di Palermo, Viale delle Scienze, Ed. 16, 90128 Palermo, Italy
| | - M C Roccheri
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche (STEBICEF), Università degli Studi di Palermo, Viale delle Scienze, Ed. 16, 90128 Palermo, Italy.
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35
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Wang YC, Lu DY, Shi F, Zhang S, Yang CB, Wang B, Cao XS, Du TY, Gao Y, Zhao JD, Sun XQ. Clinorotation enhances autophagy in vascular endothelial cells. Biochem Cell Biol 2013; 91:309-14. [DOI: 10.1139/bcb-2013-0029] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Individuals exposed to extended periods of spaceflight or prolonged 6° head-down-tilt bed rest often suffer from health hazards represented by cardiovascular deconditioning. Many studies have reported that alterations in vascular endothelial cells contribute to cardiovascular dysfunction induced by microgravity. Autophagy, a lysosomal degradation pathway, serves an adaptive role for survival, differentiation, and development in cellular homeostasis, and can be triggered by various environmental stimuli. However, whether autophagy can be induced in endothelial cells by real or simulated microgravity remains to be determined. This study was designed to investigate the effects of simulated microgravity on the activation of autophagy in human umbilical vein endothelial cells (HUVECs). We report here that clinorotation, a simulated model of microgravity, enhances autophagosome formation, increases LC3 and beclin-1 expression, and promotes the conversion of LC3-I to LC3-II in HUVECs. These results demonstrate that simulated microgravity for 48 h activates autophagy of vascular endothelial cells.
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Affiliation(s)
- Yong-Chun Wang
- Department of Aerospace Biodynamics, School of Aerospace Medicine, Fourth Military Medical University, 17 Chang Le Xi Road, Xi’an 710032, P. R. China
| | - Dong-Yuan Lu
- Department of Aerospace Biodynamics, School of Aerospace Medicine, Fourth Military Medical University, 17 Chang Le Xi Road, Xi’an 710032, P. R. China
| | - Fei Shi
- Department of Aerospace Biodynamics, School of Aerospace Medicine, Fourth Military Medical University, 17 Chang Le Xi Road, Xi’an 710032, P. R. China
| | - Shu Zhang
- The Key Laboratory of Aerospace Medicine, Chinese Ministry of Education, Xi’an 710032, P. R. China
| | - Chang-Bin Yang
- Department of Aerospace Biodynamics, School of Aerospace Medicine, Fourth Military Medical University, 17 Chang Le Xi Road, Xi’an 710032, P. R. China
| | - Bing Wang
- The Key Laboratory of Aerospace Medicine, Chinese Ministry of Education, Xi’an 710032, P. R. China
| | - Xin-Sheng Cao
- The Key Laboratory of Aerospace Medicine, Chinese Ministry of Education, Xi’an 710032, P. R. China
| | - Ting-Yuan Du
- Department of Aerospace Biodynamics, School of Aerospace Medicine, Fourth Military Medical University, 17 Chang Le Xi Road, Xi’an 710032, P. R. China
| | - Yuan Gao
- Department of Aerospace Biodynamics, School of Aerospace Medicine, Fourth Military Medical University, 17 Chang Le Xi Road, Xi’an 710032, P. R. China
| | - Jiang-Dong Zhao
- Department of Aerospace Biodynamics, School of Aerospace Medicine, Fourth Military Medical University, 17 Chang Le Xi Road, Xi’an 710032, P. R. China
| | - Xi-Qing Sun
- Department of Aerospace Biodynamics, School of Aerospace Medicine, Fourth Military Medical University, 17 Chang Le Xi Road, Xi’an 710032, P. R. China
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Cadmium and cellular signaling cascades: interactions between cell death and survival pathways. Arch Toxicol 2013; 87:1743-86. [PMID: 23982889 DOI: 10.1007/s00204-013-1110-9] [Citation(s) in RCA: 177] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2013] [Accepted: 07/29/2013] [Indexed: 12/20/2022]
Abstract
Cellular stress elicited by the toxic metal Cd(2+) does not coerce the cell into committing to die from the onset. Rather, detoxification and adaptive processes are triggered concurrently, allowing survival until normal function is restored. With high Cd(2+), death pathways predominate. However, if sublethal stress levels affect cells for prolonged periods, as in chronic low Cd(2+) exposure, adaptive and survival mechanisms may deregulate, such that tumorigenesis ensues. Hence, death and malignancy are the two ends of a continuum of cellular responses to Cd(2+), determined by magnitude and duration of Cd(2+) stress. Signaling cascades are the key factors affecting cellular reactions to Cd(2+). This review critically surveys recent literature to outline major features of death and survival signaling pathways as well as their activation, interactions and cross talk in cells exposed to Cd(2+). Under physiological conditions, receptor activation generates 2nd messengers, which are short-lived and act specifically on effectors through their spatial and temporal dynamics to transiently alter effector activity. Cd(2+) recruits physiological 2nd messenger systems, in particular Ca(2+) and reactive oxygen species (ROS), which control key Ca(2+)- and redox-sensitive molecular switches dictating cell function and fate. Severe ROS/Ca(2+) signals activate cell death effectors (ceramides, ASK1-JNK/p38, calpains, caspases) and/or cause irreversible damage to vital organelles, such as mitochondria and endoplasmic reticulum (ER), whereas low localized ROS/Ca(2+) levels act as 2nd messengers promoting cellular adaptation and survival through signal transduction (ERK1/2, PI3K/Akt-PKB) and transcriptional regulators (Ref1-Nrf2, NF-κB, Wnt, AP-1, bestrophin-3). Other cellular proteins and processes targeted by ROS/Ca(2+) (metallothioneins, Bcl-2 proteins, ubiquitin-proteasome system, ER stress-associated unfolded protein response, autophagy, cell cycle) can evoke death or survival. Hence, temporary or permanent disruptions of ROS/Ca(2+) induced by Cd(2+) play a crucial role in eliciting, modulating and linking downstream cell death and adaptive and survival signaling cascades.
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Wang Q, Zhu J, Zhang K, Jiang C, Wang Y, Yuan Y, Bian J, Liu X, Gu J, Liu Z. Induction of cytoprotective autophagy in PC-12 cells by cadmium. Biochem Biophys Res Commun 2013; 438:186-92. [DOI: 10.1016/j.bbrc.2013.07.050] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Accepted: 07/14/2013] [Indexed: 02/08/2023]
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Qu W, Pi J, Waalkes MP. Metallothionein blocks oxidative DNA damage in vitro. Arch Toxicol 2013; 87:311-21. [PMID: 22914987 PMCID: PMC3554841 DOI: 10.1007/s00204-012-0927-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Accepted: 08/06/2012] [Indexed: 01/12/2023]
Abstract
The role of metallothionein (MT) in mitigation of oxidative DNA damage (ODD) induced by either cadmium (Cd) or the direct oxidant hydrogen peroxide (H(2)O(2)) was systematically examined using MT-I/II double knockout (MT-null) or MT-competent wild-type (WT) cells. Both toxicants were much more lethal to MT-null cells (Cd LC(50) = 6.6 μM; H(2)O(2) LC(50) = 550 μM) than to WT cells (Cd LC(50) = 16.5 μM; H(2)O(2) LC(50) = 930 μM). Cd induced concentration-related MT increases in WT cells, while the basal levels were undetectable and not increased by Cd in MT-null cells. ODD, measured by the immuno-spin trapping method, was minimally induced by sub-toxic Cd levels (1 or 5 μM; 24 h) in WT cells, but markedly increased in MT-null cells (>430 %). Similarly, ODD was induced to higher levels by lower concentrations of H(2)O(2) in MT-null cells than WT cells. Transfection of MT-I into MT-null cells reduced both Cd- and H(2)O(2)-induced cytolethality and ODD. Cd increased the expression of the oxidant defense genes, HO-1, and GSTa2 to a much greater extent in MT-null cells than in WT. Cd or H(2)O(2) exposure increased the expression of key transport genes, Mrp1 and Mrp2, in WT cells but not in MT-null cells. MT protects against Cd- and H(2)O(2)-induced ODD in MT-competent cells possibly by multiple mechanisms, potentially including direct metal ion sequestration and sequestration of oxidant radicals by MT. MT-deficient cells appear to adapt to Cd primarily by turning on oxidant response systems, while MT-competent cells activate MT and transport systems.
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Affiliation(s)
- Wei Qu
- Inorganic Toxicology Group, National Toxicology Program Laboratory, Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA
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Pozuelo-Rubio M. 14-3-3 Proteins are Regulators of Autophagy. Cells 2012; 1:754-73. [PMID: 24710529 PMCID: PMC3901138 DOI: 10.3390/cells1040754] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2012] [Revised: 08/03/2012] [Accepted: 09/18/2012] [Indexed: 12/19/2022] Open
Abstract
14-3-3 proteins are implicated in the regulation of proteins involved in a variety of signaling pathways. 14-3-3-dependent protein regulation occurs through phosphorylation-dependent binding that results, in many cases, in the release of survival signals in cells. Autophagy is a cell digestion process that contributes to overcoming nutrient deprivation and is initiated under stress conditions. However, whether autophagy is a cell survival or cell death mechanism remains under discussion and may depend on context. Nevertheless, autophagy is a cellular process that determines cell fate and is tightly regulated by different signaling pathways, some of which, for example MAPK, PI3K and mTOR, are tightly regulated by 14-3-3 proteins. It is therefore important to understand the role of 14-3-3 protein in modulating the autophagic process. Within this context, direct binding of 14-3-3 to mTOR regulatory proteins, such as TSC2 and PRAS40, connects 14-3-3 with autophagy regulatory processes. In addition, 14-3-3 binding to human vacuolar protein sorting 34 (hVps34), a class III phosphatidylinositol-3-kinase (PI3KC3), indicates the involvement of 14-3-3 proteins in regulating autophagosome formation. hVps34 is involved in vesicle trafficking processes such as autophagy, and its activation is needed for initiation of autophagy. Chromatography and overlay techniques suggest that hVps34 directly interacts with 14-3-3 proteins under physiological conditions, thereby maintaining hVps34 in an inactive state. In contrast, nutrient starvation promotes dissociation of the 14-3-3–hVps34 complex, thereby enhancing hVps34 lipid kinase activity. Thus, 14-3-3 proteins are regulators of autophagy through regulating key components of the autophagic machinery. This review summarizes the role of 14-3-3 protein in the control of target proteins involved in regulating the master switches of autophagy.
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Affiliation(s)
- Mercedes Pozuelo-Rubio
- Centro Andaluz de Biología Molecular y Medicina Regenerativa, Consejo Superior de Investigaciones Científicas. Av. Américo Vespucio s/n, Sevilla-41092, Spain.
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Heavy metals and metalloids as autophagy inducing agents: focus on cadmium and arsenic. Cells 2012; 1:597-616. [PMID: 24710492 PMCID: PMC3901116 DOI: 10.3390/cells1030597] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Revised: 08/10/2012] [Accepted: 08/14/2012] [Indexed: 11/17/2022] Open
Abstract
In recent years, research on the autophagic process has greatly increased, invading the fields of biology and medicine. Several markers of the autophagic process have been discovered and various strategies have been reported studying this molecular process in different biological systems in both physiological and stress conditions. Furthermore, mechanisms of metalloid- or heavy metal-induced toxicity continue to be of interest given the ubiquitous nature and distribution of these contaminants in the environment where they often play the role of pollutants of numerous organisms. The aim of this review is a critical analysis and correlation of knowledge of autophagic mechanisms studied under stress for the most common arsenic (As) and cadmium (Cd) compounds. In this review we report data obtained in different experimental models for each compound, highlighting similarities and/or differences in the activation of autophagic processes. A more detailed discussion will concern the activation of autophagy in Cd-exposed sea urchin embryo since it is a suitable model system that is very sensitive to environmental stress, and Cd is one of the most studied heavy metal inductors of stress and modulator of different factors such as: protein kinase and phosphatase, caspases, mitochondria, heat shock proteins, metallothioneins, transcription factors, reactive oxygen species, apoptosis and autophagy.
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Wogonin induces reactive oxygen species production and cell apoptosis in human glioma cancer cells. Int J Mol Sci 2012; 13:9877-9892. [PMID: 22949836 PMCID: PMC3431834 DOI: 10.3390/ijms13089877] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Revised: 07/06/2012] [Accepted: 07/26/2012] [Indexed: 11/17/2022] Open
Abstract
Glioma is the most common primary adult brain tumor with poor prognosis because of the ease of spreading tumor cells to other regions of the brain. Cell apoptosis is frequently targeted for developing anti-cancer drugs. In the present study, we have assessed wogonin, a flavonoid compound isolated from Scutellaria baicalensis Georgi, induced ROS generation, endoplasmic reticulum (ER) stress and cell apoptosis. Wogonin induced cell death in two different human glioma cells, such as U251 and U87 cells but not in human primary astrocytes (IC 50 > 100 μM). Wogonin-induced apoptotic cell death in glioma cells was measured by propidine iodine (PI) analysis, Tunnel assay and Annexin V staining methods. Furthermore, wogonin also induced caspase-9 and caspase-3 activation as well as up-regulation of cleaved PARP expression. Moreover, treatment of wogonin also increased a number of signature ER stress markers glucose-regulated protein (GRP)-78, GRP-94, Calpain I, and phosphorylation of eukaryotic initiation factor-2α (eIF2α). Treatment of human glioma cells with wogonin was found to induce reactive oxygen species (ROS) generation. Wogonin induced ER stress-related protein expression and cell apoptosis was reduced by the ROS inhibitors apocynin and NAC (N-acetylcysteine). The present study provides evidence to support the fact that wogonin induces human glioma cell apoptosis mediated ROS generation, ER stress activation and cell apoptosis.
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Bolt AM, Klimecki WT. Autophagy in toxicology: self-consumption in times of stress and plenty. J Appl Toxicol 2012; 32:465-79. [PMID: 22334383 DOI: 10.1002/jat.1787] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2011] [Accepted: 11/11/2011] [Indexed: 12/22/2022]
Abstract
Autophagy is a critical cellular process orchestrating the lysosomal degradation of cellular components in order to maintain cellular homeostasis and respond to cellular stress. A growing research effort over the last decade has proven autophagy to be essential for constitutive protein and organelle turnover, for embryonic/neonatal survival and for cell survival during conditions of environmental stress. Emphasizing its biological importance, dysfunctional autophagy contributes to a diverse set of human diseases. Cellular stress induced by xenobiotic exposure typifies environmental stress, and can result in the induction of autophagy as a cytoprotective mechanism. An increasing number of xenobiotics are notable for their ability to modulate the induction or the rate of autophagy. The role of autophagy in normal cellular homeostasis, the intricate relationship between cellular stress and the induction of autophagy, and the identification of specific xenobiotics capable of modulating autophagy, point to the importance of the autophagic process in toxicology. This review will summarize the importance of autophagy and its role in cellular response to stress, including examples in which consideration of autophagy has contributed to a more complete understanding of toxicant-perturbed systems.
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Affiliation(s)
- Alicia M Bolt
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ 85724, USA.
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Son YO, Wang X, Hitron JA, Zhang Z, Cheng S, Budhraja A, Ding S, Lee JC, Shi X. Cadmium induces autophagy through ROS-dependent activation of the LKB1-AMPK signaling in skin epidermal cells. Toxicol Appl Pharmacol 2011; 255:287-96. [PMID: 21767558 DOI: 10.1016/j.taap.2011.06.024] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2011] [Revised: 06/29/2011] [Accepted: 06/30/2011] [Indexed: 12/17/2022]
Abstract
Cadmium is a toxic heavy metal which is environmentally and occupationally relevant. The mechanisms underlying cadmium-induced autophagy are not yet completely understood. The present study shows that cadmium induces autophagy, as demonstrated by the increase of LC3-II formation and the GFP-LC3 puncta cells. The induction of autophagosomes was directly visualized by electron microscopy in cadmium-exposed skin epidermal cells. Blockage of LKB1 or AMPK by siRNA transfection suppressed cadmium-induced autophagy. Cadmium-induced autophagy was inhibited in dominant-negative AMPK-transfected cells, whereas it was accelerated in cells transfected with the constitutively active form of AMPK. mTOR signaling, a negative regulator of autophagy, was downregulated in cadmium-exposed cells. In addition, cadmium generated reactive oxygen species (ROS) at relatively low levels, and caused poly(ADP-ribose) polymerase-1 (PARP) activation and ATP depletion. Inhibition of PARP by pharmacological inhibitors or its siRNA transfection suppressed ATP reduction and autophagy in cadmium-exposed cells. Furthermore, cadmium-induced autophagy signaling was attenuated by either exogenous addition of catalase and superoxide dismutase, or by overexpression of these enzymes. Consequently, these results suggest that cadmium-mediated ROS generation causes PARP activation and energy depletion, and eventually induces autophagy through the activation of LKB1-AMPK signaling and the down-regulation of mTOR in skin epidermal cells.
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Affiliation(s)
- Young-Ok Son
- Graduate Center for Toxicology, College of Medicine, University of Kentucky, Lexington, KY 40536-0305, USA
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Sridharan S, Jain K, Basu A. Regulation of autophagy by kinases. Cancers (Basel) 2011; 3:2630-54. [PMID: 24212825 PMCID: PMC3757434 DOI: 10.3390/cancers3022630] [Citation(s) in RCA: 145] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2011] [Revised: 05/15/2011] [Accepted: 05/27/2011] [Indexed: 12/16/2022] Open
Abstract
Autophagy is a process of self-degradation that maintains cellular viability during periods of metabolic stress. Although autophagy is considered a survival mechanism when faced with cellular stress, extensive autophagy can also lead to cell death. Aberrations in autophagy are associated with several diseases, including cancer. Therapeutic exploitation of this process requires a clear understanding of its regulation. Although the core molecular components involved in the execution of autophagy are well studied there is limited information on how cellular signaling pathways, particularly kinases, regulate this complex process. Protein kinases are integral to the autophagy process. Atg1, the first autophagy-related protein identified, is a serine/threonine kinase and it is regulated by another serine/threonine kinase mTOR. Emerging studies suggest the participation of many different kinases in regulating various components/steps of this catabolic process. This review focuses on the regulation of autophagy by several kinases with particular emphasis on serine/threonine protein kinases such as mTOR, AMP-activated protein kinase, Akt, mitogen-activated protein kinase (ERK, p38 and JNK) and protein kinase C that are often deregulated in cancer and are important therapeutic targets.
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Affiliation(s)
- Savitha Sridharan
- Department of Molecular Biology and Immunology, University of North Texas Health Science Center and Institute for Cancer Research, Fort Worth, TX 76107, USA.
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