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Kobayashi H, Matsubara S, Yoshimoto C, Shigetomi H, Imanaka S. The role of mitochondrial dynamics in the pathophysiology of endometriosis. J Obstet Gynaecol Res 2023; 49:2783-2791. [PMID: 37681703 DOI: 10.1111/jog.15791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 08/31/2023] [Indexed: 09/09/2023]
Abstract
AIM Endometriosis is a chronic disease of reproductive age, associated with pelvic pain and infertility. Endometriotic cells adapt to changing environments such as oxidative stress and hypoxia in order to survive. However, the underlying mechanisms remain to be fully elucidated. In this review, we summarize our current understanding of the pathogenesis of endometriosis, focusing primarily on the molecular basis of energy metabolism, redox homeostasis, and mitochondrial function, and discuss perspectives on future research directions. METHODS Papers published up to March 31, 2023 in the PubMed and Google Scholar databases were included in this narrative literature review. RESULTS Mitochondria serve as a central hub sensing a multitude of physiological processes, including energy production and cellular redox homeostasis. Under hypoxia, endometriotic cells favor glycolysis and actively produce pyruvate, nicotinamide adenine dinucleotide phosphate (NADPH), and other metabolites for cell proliferation. Mitochondrial fission and fusion dynamics may regulate the phenotypic plasticity of cellular energy metabolism, that is, aerobic glycolysis or OXPHOS. Endometriotic cells have been reported to have reduced mitochondrial numbers, increased lamellar cristae, improved energy efficiency, and enhanced cell proliferation and survival. Increased mitochondrial fission and fusion turnover by hypoxic and normoxic conditions suggests an activation of mitochondrial quality control mechanisms. Recently, candidate molecules that influence mitochondrial dynamics have begun to be identified. CONCLUSION This review suggests that unique energy metabolism and redox homeostasis driven by mitochondrial dynamics may be linked to the pathophysiology of endometriosis. However, further studies are needed to elucidate the regulatory mechanisms of mitochondrial dynamics in endometriosis.
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Affiliation(s)
- Hiroshi Kobayashi
- Department of Gynecology and Reproductive Medicine, Ms.Clinic MayOne, Kashihara, Japan
- Department of Obstetrics and Gynecology, Nara Medical University, Kashihara, Japan
| | - Sho Matsubara
- Department of Obstetrics and Gynecology, Nara Medical University, Kashihara, Japan
- Department of Medicine, Kei Oushin Clinic, Nishinomiya, Japan
| | - Chiharu Yoshimoto
- Department of Obstetrics and Gynecology, Nara Medical University, Kashihara, Japan
- Department of Obstetrics and Gynecology, Nara Prefecture General Medical Center, Nara, Japan
| | - Hiroshi Shigetomi
- Department of Obstetrics and Gynecology, Nara Medical University, Kashihara, Japan
- Department of Gynecology and Reproductive Medicine, Aska Ladies Clinic, Nara, Japan
| | - Shogo Imanaka
- Department of Gynecology and Reproductive Medicine, Ms.Clinic MayOne, Kashihara, Japan
- Department of Obstetrics and Gynecology, Nara Medical University, Kashihara, Japan
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Lee R, Kim DW, Lee WY, Park HJ. Zearalenone Induces Apoptosis and Autophagy in a Spermatogonia Cell Line. Toxins (Basel) 2022; 14:toxins14020148. [PMID: 35202175 PMCID: PMC8878478 DOI: 10.3390/toxins14020148] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 02/04/2022] [Accepted: 02/15/2022] [Indexed: 02/01/2023] Open
Abstract
Zearalenone (ZEN), a widely known mycotoxin, is mainly produced by various Fusarium species, and it is a potent estrogenic metabolite that affects reproductive health in livestock and humans. In this study, the molecular mechanisms of toxicity and cell damage induced by ZEN in GC-1 spermatogonia (spg) cells were evaluated. Our results showed that cell viability decreased and apoptosis increased in a dose-dependent manner when GC-1 spg cells were exposed to ZEN. In addition, the key proteins involved in apoptosis, cleaved caspase-3 and -8, BAD, BAX, and phosphorylation of p53 and ERK1/2, were significantly increased in ZEN-exposed GC-1 spg cells for 24 h, and cytochrome c was released from mitochondria by ZEN. Interestingly, ZEN also triggered autophagy in GC-1 spg cells. The expression levels of the autophagy-related genes Atg5, Atg3, Beclin 1, LC3, Ulk1, Bnip 3, and p62 were significantly higher in ZEN-treated GC-1 spg cells, and the protein levels of both LC3A/B and Atg12 were remarkably increased in a dose-dependent manner in ZEN-exposed GC-1 spg cells compared to the control. In addition, immunostaining results showed that ZEN-treated groups showed a remarkable increase in LC 3A/B positive puncta as compared to the control in a dose-dependent manner based on confocal microscopy analysis in GC-1 spg cells. Our findings suggest that ZEN has toxic effects on tGC-1 spg cells and induces both apoptosis and autophagy.
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Affiliation(s)
- Ran Lee
- Department of Stem Cell and Regenerative Biology, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 05029, Korea;
| | - Dong-Wook Kim
- Department of Swine & Poultry Science, Korea National College of Agriculture and Fisheries, 1515, Kongjwipatjwi-ro, Deokjin-gu, Jeonju-si 54874, Jeollabuk-do, Korea;
| | - Won-Young Lee
- Department of Beef & Dairy Science, Korea National College of Agricultures and Fisheries, 1515, Kongjwipatjwi-ro, Deokjin-gu, Jeonju-si 54874, Jeollabuk-do, Korea;
| | - Hyun-Jung Park
- Department of Animal Biotechnology, Sangji University, 83, Sangjidae-gil, Wonju-si 26339, Gangwon-do, Korea
- Correspondence: ; Tel.: +33-730-0543
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Wei CC, Yang NC, Huang CW. Zearalenone Induces Dopaminergic Neurodegeneration via DRP-1-Involved Mitochondrial Fragmentation and Apoptosis in a Caenorhabditis elegans Parkinson's Disease Model. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:12030-12038. [PMID: 34586801 DOI: 10.1021/acs.jafc.1c05836] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The contamination of mycotoxin zearalenone (ZEN) in foods has been reported worldwide, resulting in potential risks to food safety. However, the toxic mechanism of ZEN on neurodegenerative diseases has not been fully elucidated. Therefore, this study conducted in vivo ZEN neurotoxicity assessment on Parkinson's disease (PD)-related dopaminergic neurodegeneration and mitochondrial dysfunction using Caenorhabditis elegans. The results demonstrated that dopaminergic neuron damage was induced by ZEN exposure (1.25, 10, and 50 μM), and dopaminergic neuron-related behaviors were adversely affected subsequently. Additionally, the mitochondrial fragmentation was significantly increased by ZEN exposure. Moreover, upregulated expression of mitochondrial fission and cell apoptosis-related genes (drp-1, egl-1, ced-4, and ced-3) revealed the crucial role of DRP-1 on ZEN-induced neurotoxicity, which was further confirmed by drp-1 mutant and RNAi assays. In conclusion, our study indicates ZEN-induced dopaminergic neurodegeneration via DRP-1-involved mitochondrial fragmentation and apoptosis, which might cause harmful effects on PD-related symptoms.
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Affiliation(s)
- Chia-Cheng Wei
- Institute of Food Safety and Health, College of Public Health, National Taiwan University, No. 17, Xuzhou Rd., Taipei 100, Taiwan
- Department of Public Health, College of Public Health, National Taiwan University, No. 17, Xuzhou Rd., Taipei 100, Taiwan
| | - Nien-Chieh Yang
- Institute of Food Safety and Health, College of Public Health, National Taiwan University, No. 17, Xuzhou Rd., Taipei 100, Taiwan
| | - Chi-Wei Huang
- Institute of Food Safety and Health, College of Public Health, National Taiwan University, No. 17, Xuzhou Rd., Taipei 100, Taiwan
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Kinkade CW, Rivera-Núñez Z, Gorcyzca L, Aleksunes LM, Barrett ES. Impact of Fusarium-Derived Mycoestrogens on Female Reproduction: A Systematic Review. Toxins (Basel) 2021; 13:373. [PMID: 34073731 PMCID: PMC8225184 DOI: 10.3390/toxins13060373] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/17/2021] [Accepted: 05/18/2021] [Indexed: 01/03/2023] Open
Abstract
Contamination of the world's food supply and animal feed with mycotoxins is a growing concern as global temperatures rise and promote the growth of fungus. Zearalenone (ZEN), an estrogenic mycotoxin produced by Fusarium fungi, is a common contaminant of cereal grains and has also been detected at lower levels in meat, milk, and spices. ZEN's synthetic derivative, zeranol, is used as a growth promoter in United States (US) and Canadian beef production. Experimental research suggests that ZEN and zeranol disrupt the endocrine and reproductive systems, leading to infertility, polycystic ovarian syndrome-like phenotypes, pregnancy loss, and low birth weight. With widespread human dietary exposure and growing experimental evidence of endocrine-disrupting properties, a comprehensive review of the impact of ZEN, zeranol, and their metabolites on the female reproductive system is warranted. The objective of this systematic review was to summarize the in vitro, in vivo, and epidemiological literature and evaluate the potential impact of ZEN, zeranol, and their metabolites (commonly referred to as mycoestrogens) on female reproductive outcomes. We conducted a systematic review (PROSPERO registration CRD42020166469) of the literature (2000-2020) following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The data sources were primary literature published in English obtained from searching PubMed, Web of Science, and Scopus. The ToxR tool was applied to assess risk of bias. In vitro and in vivo studies (n = 104) were identified and, overall, evidence consistently supported adverse effects of mycoestrogens on physiological processes, organs, and tissues associated with female reproduction. In non-pregnant animals, mycoestrogens alter follicular profiles in the ovary, disrupt estrus cycling, and increase myometrium thickness. Furthermore, during pregnancy, mycoestrogen exposure contributes to placental hemorrhage, stillbirth, and impaired fetal growth. No epidemiological studies fitting the inclusion criteria were identified.
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Affiliation(s)
- Carolyn W. Kinkade
- Joint Graduate Program in Exposure Science, Department of Environmental Sciences, Rutgers University, Piscataway, NJ 08854, USA
- Environmental and Occupational Health Sciences Institute, Rutgers University, Piscataway, NJ 08854, USA; (Z.R.-N.); (L.M.A.)
| | - Zorimar Rivera-Núñez
- Environmental and Occupational Health Sciences Institute, Rutgers University, Piscataway, NJ 08854, USA; (Z.R.-N.); (L.M.A.)
- Department of Biostatistics and Epidemiology, School of Public Health, Rutgers University, Piscataway, NJ 08854, USA
| | - Ludwik Gorcyzca
- Joint Graduate Program in Toxicology, Rutgers University, Piscataway, NJ 08554, USA;
| | - Lauren M. Aleksunes
- Environmental and Occupational Health Sciences Institute, Rutgers University, Piscataway, NJ 08854, USA; (Z.R.-N.); (L.M.A.)
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, NJ 08854, USA
- Rutgers Center for Lipid Research, New Jersey Institute for Food, Nutrition, and Health, Rutgers University, New Brunswick, NJ 08901, USA
| | - Emily S. Barrett
- Environmental and Occupational Health Sciences Institute, Rutgers University, Piscataway, NJ 08854, USA; (Z.R.-N.); (L.M.A.)
- Department of Biostatistics and Epidemiology, School of Public Health, Rutgers University, Piscataway, NJ 08854, USA
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Zearalenone Induces Endothelial Cell Apoptosis through Activation of a Cytosolic Ca 2+/ERK1/2/p53/Caspase 3 Signaling Pathway. Toxins (Basel) 2021; 13:toxins13030187. [PMID: 33806711 PMCID: PMC8001463 DOI: 10.3390/toxins13030187] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 02/27/2021] [Accepted: 02/28/2021] [Indexed: 12/22/2022] Open
Abstract
Zearalenone (ZEN) is a mycotoxin that has been reported to damage various types of cells/tissues, yet its effects on endothelial cells (ECs) have never been investigated. Therefore, this study investigates the potential effects of ZEN using bovine aortic ECs (BAECs). In this study, we found that ZEN induced apoptosis of BAECs through increased cleavage of caspase 3 and poly ADP-ribose polymerase (PARP). ZEN also increased phosphorylation of ERK1/2 and p53, and treatment with the ERK1/2 or p53 inhibitor reversed ZEN-induced EC apoptosis. Transfection of BAECs with small interfering RNA against ERK1/2 or p53 revealed ERK1/2 as an upstream target of p53 in ZEN-stimulated apoptosis. ZEN increased the production of reactive oxygen species (ROS), yet treatment with the antioxidant did not prevent EC apoptosis. Similarly, blocking of estrogen receptors by specific inhibitors also did not prevent ZEN-induced apoptosis. Finally, chelation of cytosolic calcium (Ca2+) using BAPTA-AM or inhibition of endoplasmic reticulum (ER) Ca2+ channel using 2-APB reversed ZEN-induced EC apoptosis, but not by inhibiting ER stress using 4-PBA. Together, our findings demonstrate that ZEN induces EC apoptosis through an ERK1/2/p53/caspase 3 signaling pathway activated by Ca2+ release from the ER, and this pathway is independent of ROS production and estrogen receptor activation.
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Zhong Y, Jin C, Han J, Zhu J, Liu Q, Sun D, Xia X, Peng X. Inhibition of ER stress attenuates kidney injury and apoptosis induced by 3-MCPD via regulating mitochondrial fission/fusion and Ca 2+ homeostasis. Cell Biol Toxicol 2021; 37:795-809. [PMID: 33651226 DOI: 10.1007/s10565-021-09589-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Accepted: 02/09/2021] [Indexed: 11/25/2022]
Abstract
3-Chloro-1, 2-propanediol (3-MCPD) is a food-borne toxic substance well-known for more than 40 years that is mainly associated with nephrotoxicity. A better understanding of 3-MCPD nephrotoxicity is required to devise efficacious strategies to counteract its toxicity. In the present work, the role of endoplasmic reticulum (ER) stress along with its underlying regulatory mechanism in 3-MCPD-mediated renal cytotoxicity was investigated in vivo and in vitro. Our data indicated that 3-MCPD-stimulated ER stress response evidenced by sustained activation of PERK-ATF4-p-CHOP and IRE1 branches in Sprague Dawley (SD) rats and human embryonic kidney (HEK293) cells. Moreover, ER stress-associated specific apoptotic initiator, caspase 12, was over-expressed. Blocking ER stress with its antagonist, 4-phenylbutyric acid (4-PBA), improved the morphology and function of kidney effectively. 4-PBA also increased cell viability, relieved mitochondrial vacuolation, and inhibited cell apoptosis through regulating caspase-dependent intrinsic apoptosis pathways. Furthermore, the enhanced expressions of two mitochondrial fission proteins, DRP1/p-DRP1 and FIS1, and the relocation of DRP1 on mitochondria subjected to 3-MPCD were reversed by 4-PBA, while the expression of the fusion protein, MFN2, was restored. Moreover, cellular Ca2+ overload, the over-expression of CaMKK2, and the loss of mitochondria-associated membranes (MAM) were also relieved after 4-PBA co-treatment. Collectively, our data emphasized that ER stress plays critical role in 3-MCPD-mediated mitochondrial dysfunction and subsequent apoptosis as well as blockage of ER stress ameliorated kidney injury through improving mitochondrial fission/fusion and Ca2+ homeostasis. These findings provide a novel insight into the regulatory role of ER stress in 3-MCPD-associated nephropathy and a potential therapeutic strategy. Graphical Headlights 1. 4-PBA inhibits ER stress mainly through regulating PERK-ATF4-CHOP and IRE1-XBP1s branches. 2. Inhibition of ER stress by 4-PBA mitigates ER associated and mitochondrial apoptosis 3. Inhibition of ER stress by 4-PBA helps maintaining calcium homeostasis and mitochondrial dynamic.
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Affiliation(s)
- Yujie Zhong
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Chengni Jin
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Jiahui Han
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Jiachang Zhu
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Qi Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Dianjun Sun
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Xiaodong Xia
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Xiaoli Peng
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China.
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Márton É, Varga A, Széles L, Göczi L, Penyige A, Nagy B, Szilágyi M. The Cell-Free Expression of MiR200 Family Members Correlates with Estrogen Sensitivity in Human Epithelial Ovarian Cells. Int J Mol Sci 2020; 21:ijms21249725. [PMID: 33419253 PMCID: PMC7766742 DOI: 10.3390/ijms21249725] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 12/11/2020] [Accepted: 12/17/2020] [Indexed: 12/15/2022] Open
Abstract
Exposure to physiological estrogens or xenoestrogens (e.g., zearalenone or bisphenol A) increases the risk for cancer. However, little information is available on their significance in ovarian cancer. We present a comprehensive study on the effect of estradiol, zearalenone and bisphenol A on the phenotype, mRNA, intracellular and cell-free miRNA expression of human epithelial ovarian cell lines. Estrogens induced a comparable effect on the rate of cell proliferation and migration as well as on the expression of estrogen-responsive genes (GREB1, CA12, DEPTOR, RBBP8) in the estrogen receptor α (ERα)-expressing PEO1 cell line, which was not observable in the absence of this receptor (in A2780 cells). The basal intracellular and cell-free expression of miR200s and miR203a was higher in PEO1, which was accompanied with low ZEB1 and high E-cadherin expression. These miRNAs showed a rapid but intermittent upregulation in response to estrogens that was diminished by an ERα-specific antagonist. The role of ERα in the regulation of the MIR200B-MIR200A-MIR429 locus was further supported by publicly available ChIP-seq data. MiRNA expression of cell lysates correlated well with cell-free miRNA expression. We conclude that cell-free miR200s might be promising biomarkers to assess estrogen sensitivity of ovarian cells.
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Affiliation(s)
- Éva Márton
- Department of Human Genetics, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (É.M.); (A.V.); (L.S.); (L.G.); (A.P.); (B.N.)
| | - Alexandra Varga
- Department of Human Genetics, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (É.M.); (A.V.); (L.S.); (L.G.); (A.P.); (B.N.)
| | - Lajos Széles
- Department of Human Genetics, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (É.M.); (A.V.); (L.S.); (L.G.); (A.P.); (B.N.)
| | - Lóránd Göczi
- Department of Human Genetics, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (É.M.); (A.V.); (L.S.); (L.G.); (A.P.); (B.N.)
| | - András Penyige
- Department of Human Genetics, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (É.M.); (A.V.); (L.S.); (L.G.); (A.P.); (B.N.)
- Faculty of Pharmacology, University of Debrecen, H-4032 Debrecen, Hungary
| | - Bálint Nagy
- Department of Human Genetics, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (É.M.); (A.V.); (L.S.); (L.G.); (A.P.); (B.N.)
| | - Melinda Szilágyi
- Department of Human Genetics, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (É.M.); (A.V.); (L.S.); (L.G.); (A.P.); (B.N.)
- Correspondence:
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Song Q, Xie X, Hu Z, Xue J, Zhang S, Xie X. (Z)-7,4'-dimethoxy-6-hydroxy-aurone-4-O- β-glucopyranoside attenuates lipoteichoic acid-induced damage in rat cardiomyoblast cells. J Int Med Res 2020; 48:300060519889716. [PMID: 32865061 PMCID: PMC7469747 DOI: 10.1177/0300060519889716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 10/30/2019] [Indexed: 11/26/2022] Open
Abstract
OBJECTIVE Excessive inflammatory responses in the endocardium are related to progression of infectious endocarditis. This study aimed to investigate whether (Z)-7,4'-dimethoxy-6-hydroxy-aurone-4-O-β-glucopyranoside (DHAG), a compound isolated from the endophytic fungus Penicillium citrinum of Bruguiera gymnorrhiza, could attenuate cell damage caused by lipoteichoic acid (LTA) in embryonic rat heart cells (H9c2). METHODS LTA-induced cell damage occurred in H9c2 cells and the protective effects of DHAG at different concentrations (1-10 µM) were assessed. Indicators of oxidative stress and inflammatory responses in H9c2 cells were measured. RESULTS DHAG (1-10 µM) significantly attenuated LTA-induced damage in H9c2 cells, as evidenced by increased cell viability and mitochondrial membrane potential, decreased cytochrome c release and DNA fragmentation, inhibition of caspase-3 and -9 activity, and altered expression of apoptosis-related proteins. DHAG also decreased oxidative stress by increasing protein expression of nuclear factor (erythroid-derived 2)-like 2 (Nrf2). Furthermore, DHAG inhibited inflammatory responses by decreasing protein expression of nuclear factor kappa B (NF-κB) and mitogen-activated protein kinases (MAPKs). CONCLUSION DHAG exerted protective effects against LTA-induced cell damage, at least partially by decreasing oxidative stress and inhibiting inflammatory responses. Our results provide a scientific rational for developing DHAG as a therapy against infectious endocarditis.
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Affiliation(s)
- Qiang Song
- Department of Structural Heart Disease, the First Affiliated Hospital of Medical College, Xi’an Jiaotong University, Xi’an, China
| | - Xuegang Xie
- Department of Structural Heart Disease, the First Affiliated Hospital of Medical College, Xi’an Jiaotong University, Xi’an, China
| | - Zhi Hu
- Department of Structural Heart Disease, the First Affiliated Hospital of Medical College, Xi’an Jiaotong University, Xi’an, China
| | - Jianying Xue
- Department of Structural Heart Disease, the First Affiliated Hospital of Medical College, Xi’an Jiaotong University, Xi’an, China
| | - Songlin Zhang
- Department of Structural Heart Disease, the First Affiliated Hospital of Medical College, Xi’an Jiaotong University, Xi’an, China
| | - Xinming Xie
- Department of Respiratory and Critical Care Medicine, the First Affiliated Hospital of Medical College, Xi’an Jiaotong University, Xi’an, China
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T-2 Toxin-Induced Oxidative Stress Leads to Imbalance of Mitochondrial Fission and Fusion to Activate Cellular Apoptosis in the Human Liver 7702 Cell Line. Toxins (Basel) 2020; 12:toxins12010043. [PMID: 31936883 PMCID: PMC7020450 DOI: 10.3390/toxins12010043] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 01/06/2020] [Accepted: 01/07/2020] [Indexed: 12/15/2022] Open
Abstract
T-2 toxin, as a highly toxic mycotoxin to humans and animals, induces oxidative stress and apoptosis in various cells and tissues. Apoptosis and mitochondrial fusion/fission are two tightly interconnected processes that are crucial for maintaining physiological homeostasis. However, the role of mitochondrial fusion/fission in apoptosis of T-2 toxin remains unknown. Hence, we aimed to explore the putative role of mitochondrial fusion/fission on T-2 toxin induced apoptosis in normal human liver (HL-7702) cells. T-2 toxin treatment (0, 0.1, 1.0, or 10 μg/L) for 24 h caused decreased cell viability and ATP concentration and increased production of (ROS), as seen by a loss of mitochondrial membrane potential (∆Ψm) and increase in mitochondrial fragmentation. Subsequently, the mitochondrial dynamic imbalance was activated, evidenced by a dose-dependent decrease and increase in the protein expression of mitochondrial fusion (OPA1, Mfn1, and Mfn2) and fission (Drp1 and Fis1), respectively. Furthermore, the T-2 toxin promoted the release of cytochrome c from mitochondria to cytoplasm and induced cell apoptosis triggered by upregulation of Bax and Bax/Bcl-2 ratios, and further activated the caspase pathways. Taken together, these results indicate that altered mitochondrial dynamics induced by oxidative stress with T-2 toxin exposure likely contribute to mitochondrial injury and HL-7702 cell apoptosis.
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Kim JE, Park H, Choi SH, Kong MJ, Kang TC. CDDO-Me Selectively Attenuates CA1 Neuronal Death Induced by Status Epilepticus via Facilitating Mitochondrial Fission Independent of LONP1. Cells 2019; 8:cells8080833. [PMID: 31387295 PMCID: PMC6721758 DOI: 10.3390/cells8080833] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 08/02/2019] [Accepted: 08/03/2019] [Indexed: 12/12/2022] Open
Abstract
2-Cyano-3,12-dioxo-oleana-1,9(11)-dien-28-oic acid methyl ester (CDDO-Me) is a triterpenoid analogue of oleanolic acid that exhibits promising anti-cancer, anti-inflammatory, antioxidant and neuroprotective activities. In addition, CDDO-Me affects cellular differentiation and cell cycle arrest, and irreversibly inhibits Lon protease-1 (LONP1). In the present study, we evaluate the effects of CDDO-Me on mitochondrial dynamics and its downstream effectors in order to understand the underlying mechanism of the neuronal death following status epilepticus (SE, a prolonged seizure activity). CDDO-Me increased dynamin-related proteins 1 (DRP1)-serine 616 phosphorylation via activating extracellular-signal-regulated kinase 1/2 (ERK1/2) and c-Jun N-terminal kinase (JNK), but not protein kinase A (PKA) or protein phosphatases (PPs). In addition, CDDO-Me facilitated DRP1-mediated mitochondrial fissions, which selectively attenuated SE-induced CA1 neuronal death. Unlike CDDO-Me, LONP1 knockdown led to SE-induced massive degeneration of dentate granule cells, CA1 neurons and hilus interneurons without altering the expression and phosphorylation of DRP1, ERK1/2, JNK and PP2B. LONP1 knockdown could not inhibit SE-induced mitochondrial elongation in CA1 neurons. Co-treatment of CDDO-Me with LONP1 siRNA ameliorated only CA1 neuronal death, concomitant with abrogation of mitochondrial elongation induced by SE. Thus, our findings suggest that CDDO-Me may selectively attenuate SE-induced CA1 neuronal death by rescuing the abnormal mitochondrial machinery, independent of LONP1 activity.
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Affiliation(s)
- Ji-Eun Kim
- Department of Anatomy and Neurobiology, College of Medicine, Hallym University, Chuncheon 24252, Korea
- Institute of Epilepsy Research, College of Medicine, Hallym University, Chuncheon 24252, Korea
| | - Hana Park
- Department of Anatomy and Neurobiology, College of Medicine, Hallym University, Chuncheon 24252, Korea
- Institute of Epilepsy Research, College of Medicine, Hallym University, Chuncheon 24252, Korea
| | - Seo-Hyeon Choi
- Department of Anatomy and Neurobiology, College of Medicine, Hallym University, Chuncheon 24252, Korea
- Institute of Epilepsy Research, College of Medicine, Hallym University, Chuncheon 24252, Korea
| | - Min-Jeong Kong
- Department of Anatomy and Neurobiology, College of Medicine, Hallym University, Chuncheon 24252, Korea
- Institute of Epilepsy Research, College of Medicine, Hallym University, Chuncheon 24252, Korea
| | - Tae-Cheon Kang
- Department of Anatomy and Neurobiology, College of Medicine, Hallym University, Chuncheon 24252, Korea.
- Institute of Epilepsy Research, College of Medicine, Hallym University, Chuncheon 24252, Korea.
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Ouyang H, Zhou E, Wang H. Mst1-Hippo pathway triggers breast cancer apoptosis via inducing mitochondrial fragmentation in a manner dependent on JNK-Drp1 axis. Onco Targets Ther 2019; 12:1147-1159. [PMID: 30809096 PMCID: PMC6376886 DOI: 10.2147/ott.s193787] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND AND OBJECTIVE Mst1-Hippo pathway and mitochondrial fragmentation participate in the progression of several types of cancers. However, their roles in breast cancer requires investigation. The aim of our study is to determine whether Mst1 overexpression regulates the viability of breast cancer cells via modulating mitochondrial fragmentation. MATERIALS AND METHODS TUNEL staining, MTT assay and Western blotting were used to detect cancer cell death. Adenovirus-loaded Mst1 was transfected into cells to overexpress Mst1. Mitochondrial fragmentation was observed via immunofluorescence staining and Western blotting. Pathway blocker was used to detect whether Mst1 modulated cell death and mitochondrial fragmentation via JNK signaling pathway. RESULTS Our data showed that Mst1 overexpression promoted breast cancer cell death in a manner dependent on mitochondrial apoptosis. Mitochondrial oxidative stress, energy metabolism disorder, mitochondrial cyt-c liberation and mitochondrial apoptosis activation were observed after Mst1 overexpression. Furthermore, we demonstrated that Mst1 overexpression activated mitochondrial stress via triggering Drp1-related mitochondrial fragmentation, and that inhibition of Drp1-related mitochondrial fragmentation abrogated the proapoptotic effect of Mst1 overexpression on breast cancer cells. To this end, we found that Mst1 modulated Drp1 expression via the JNK signaling pathway, and that blockade of the JNK pathway attenuated mitochondrial stress and repressed apoptosis in Mst1-overexpressed cells. CONCLUSION Altogether, our results identified a tumor suppressive role for Mst1 overexpression in breast cancer via activation of the JNK-Drp1 axis and subsequent initiation of fatal mitochondrial fragmentation. Given these findings, strategies to enhance Mst1 activity and elevate the JNK-Drp1-mitochondrial fragmentation cascade have clinical benefits for patients with breast cancer.
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Affiliation(s)
- Hui Ouyang
- Department of Breast and Thyroid Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, China,
| | - Enxiang Zhou
- Department of Breast and Thyroid Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, China,
| | - Huan Wang
- Department of Breast and Thyroid Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, China,
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Tang Q, Liu W, Zhang Q, Huang J, Hu C, Liu Y, Wang Q, Zhou M, Lai W, Sheng F, Li G, Zhang R. Dynamin-related protein 1-mediated mitochondrial fission contributes to IR-783-induced apoptosis in human breast cancer cells. J Cell Mol Med 2018; 22:4474-4485. [PMID: 29993201 PMCID: PMC6111821 DOI: 10.1111/jcmm.13749] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 06/01/2018] [Indexed: 01/08/2023] Open
Abstract
IR‐783 is a kind of heptamethine cyanine dye that exhibits imaging, cancer targeting and anticancer properties. A previous study reported that its imaging and targeting properties were related to mitochondria. However, the molecular mechanism behind the anticancer activity of IR‐783 has not been well demonstrated. In this study, we showed that IR‐783 inhibits cell viability and induces mitochondrial apoptosis in human breast cancer cells. Exposure of MDA‐MB‐231 cells to IR‐783 resulted in the loss of mitochondrial membrane potential (MMP), adenosine triphosphate (ATP) depletion, mitochondrial permeability transition pore (mPTP) opening and cytochrome c (Cyto C) release. Furthermore, we found that IR‐783 induced dynamin‐related protein 1 (Drp1) translocation from the cytosol to the mitochondria, increased the expression of mitochondrial fission proteins mitochondrial fission factor (MFF) and fission‐1 (Fis1), and decreased the expression of mitochondrial fusion proteins mitofusin1 (Mfn1) and optic atrophy 1 (OPA1). Moreover, knockdown of Drp1 markedly blocked IR‐783‐mediated mitochondrial fission, loss of MMP, ATP depletion, mPTP opening and apoptosis. Our in vivo study confirmed that IR‐783 markedly inhibited tumour growth and induced apoptosis in an MDA‐MB‐231 xenograft model in association with the mitochondrial translocation of Drp1. Taken together, these findings suggest that IR‐783 induces apoptosis in human breast cancer cells by increasing Drp1‐mediated mitochondrial fission. Our study uncovered the molecular mechanism of the anti‐breast cancer effects of IR‐783 and provided novel perspectives for the application of IR‐783 in the treatment of breast cancer.
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Affiliation(s)
- Qin Tang
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, Chongqing, China
| | - Wuyi Liu
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, Chongqing, China
| | - Qian Zhang
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, Chongqing, China
| | - Jingbin Huang
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, Chongqing, China
| | - Changpeng Hu
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, Chongqing, China
| | - Yali Liu
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, Chongqing, China
| | - Qing Wang
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, Chongqing, China
| | - Min Zhou
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, Chongqing, China
| | - Wenjing Lai
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, Chongqing, China
| | - Fangfang Sheng
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, Chongqing, China
| | - Guobing Li
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, Chongqing, China
| | - Rong Zhang
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, Chongqing, China
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