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Zhou S, Cheng R, Zhang Y, Jiang Y, Zhang L, Jiang Z, Yu Q. CHIR-98014, a GSK 3β Inhibitor, Protects Against Triptolide/Lipopolysaccharide-Induced Hepatotoxicity by Mitochondria-Dependent Apoptosis Inhibition. Chem Res Toxicol 2024; 37:407-418. [PMID: 38284557 DOI: 10.1021/acs.chemrestox.3c00367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
Triptolide (TP) is a remarkable anti-inflammatory and immunosuppressive component separated from Tripterygium wilfordii Hook. F. However, its hepatotoxicity limits its application in the clinical. Our group has proposed a new perspective on TP-induced hepatotoxicity, in which TP enhances liver hypersensitivity upon lipopolysaccharide (LPS) stimulation. Because the cause of the disease is unknown, there is currently no uniform treatment available. In this study, we attempted to determine whether the GSK-3β-JNK pathway affects liver damage and its regulatory mechanism in response to TP/LPS costimulation. In addition, we investigated the effect of CsA or the GSK 3β inhibitor CHIR-98014 on TP/LPS-induced hepatotoxicity. The results showed that the TP/LPS cotreatment mice exhibited obvious hepatotoxicity, as indicated by a remarkable increase in the serum ALT and AST levels, glycogen depletion, GSK 3β-JNK upregulation, and increased apoptosis. Instead of the specific knockdown of JNK1, the specific knockdown of JNK2 had a protective effect. Additionally, 40 mg/kg of CsA and 30 mg/kg of CHIR-98014 might provide protection. In summary, CHIR-98014 could protect against TP/LPS- or TP/TNF-α-induced activation of the GSK 3β-JNK pathway and mitochondria-dependent apoptosis, improving the indirect hepatotoxicity induced by TP.
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Affiliation(s)
- Shaoyun Zhou
- New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, Nanjing 210009, China
| | - Ruohan Cheng
- New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, Nanjing 210009, China
| | - Yue Zhang
- New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, Nanjing 210009, China
| | - Yihan Jiang
- New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, Nanjing 210009, China
| | - Luyong Zhang
- New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, Nanjing 210009, China
- Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Zhenzhou Jiang
- New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, Nanjing 210009, China
- Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, China Pharmaceutical University, Nanjing 210009, China
| | - Qinwei Yu
- New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, Nanjing 210009, China
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Korotkov SM. Mitochondrial Oxidative Stress Is the General Reason for Apoptosis Induced by Different-Valence Heavy Metals in Cells and Mitochondria. Int J Mol Sci 2023; 24:14459. [PMID: 37833908 PMCID: PMC10572412 DOI: 10.3390/ijms241914459] [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: 08/09/2023] [Revised: 09/08/2023] [Accepted: 09/15/2023] [Indexed: 10/15/2023] Open
Abstract
This review analyzes the causes and consequences of apoptosis resulting from oxidative stress that occurs in mitochondria and cells exposed to the toxic effects of different-valence heavy metals (Ag+, Tl+, Hg2+, Cd2+, Pb2+, Al3+, Ga3+, In3+, As3+, Sb3+, Cr6+, and U6+). The problems of the relationship between the integration of these toxic metals into molecular mechanisms with the subsequent development of pathophysiological processes and the appearance of diseases caused by the accumulation of these metals in the body are also addressed in this review. Such apoptosis is characterized by a reduction in cell viability, the activation of caspase-3 and caspase-9, the expression of pro-apoptotic genes (Bax and Bcl-2), and the activation of protein kinases (ERK, JNK, p53, and p38) by mitogens. Moreover, the oxidative stress manifests as the mitochondrial permeability transition pore (MPTP) opening, mitochondrial swelling, an increase in the production of reactive oxygen species (ROS) and H2O2, lipid peroxidation, cytochrome c release, a decline in the inner mitochondrial membrane potential (ΔΨmito), a decrease in ATP synthesis, and reduced glutathione and oxygen consumption as well as cytoplasm and matrix calcium overload due to Ca2+ release from the endoplasmic reticulum (ER). The apoptosis and respiratory dysfunction induced by these metals are discussed regarding their interaction with cellular and mitochondrial thiol groups and Fe2+ metabolism disturbance. Similarities and differences in the toxic effects of Tl+ from those of other heavy metals under review are discussed. Similarities may be due to the increase in the cytoplasmic calcium concentration induced by Tl+ and these metals. One difference discussed is the failure to decrease Tl+ toxicity through metallothionein-dependent mechanisms. Another difference could be the decrease in reduced glutathione in the matrix due to the reversible oxidation of Tl+ to Tl3+ near the centers of ROS generation in the respiratory chain. The latter may explain why thallium toxicity to humans turned out to be higher than the toxicity of mercury, lead, cadmium, copper, and zinc.
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Affiliation(s)
- Sergey M Korotkov
- Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, Thorez pr. 44, 194223 St. Petersburg, Russia
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3
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Belyaeva EA. Modulators of mitochondrial ATP-sensitive potassium channel affect cytotoxicity of heavy metals: Action on isolated rat liver mitochondria and AS-30D ascites hepatoma cells. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 256:114829. [PMID: 36989557 DOI: 10.1016/j.ecoenv.2023.114829] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 03/06/2023] [Accepted: 03/22/2023] [Indexed: 06/19/2023]
Abstract
Heavy metals are ubiquitous environmental pollutants that are extremely dangerous for public health, but the molecular mechanisms of their cytotoxic action are still not fully understood. In the present work, the possible contribution of the mitochondrial ATP-sensitive potassium channel (mK(ATP)), which is usually considered protective for the cell, to hepatotoxicity caused by heavy metals was investigated using polarography and swelling techniques as well as flow cytometry. Using isolated liver mitochondria from adult male Wistar rats and various potassium media containing or not containing penetrating anions (KNO3, KSCN, KAcet, KCl), we studied the effect of mK(ATP) modulators, namely its blockers (5-hydroxydecanoate, glibenclamide, ATP, ADP) and activators (diazoxide, malonate), on respiration and/or membrane permeability in the presence of hepatotoxins such as Cd2+, Hg2+, and Cu2+. It has been shown for the first time that, contrary to Hg2+ and depending on media used, the mK(ATP) modulators affect Cd2+- and/or Cu2+-induced alterations in mitochondrial swelling and respiration rates, although differently, nevertheless, in the ways compatible with mK(ATP) participation in both these cases. On rat AS-30D ascites hepatoma cells, it was found that, unlike Cd2+, an increase in the production of reactive oxygen species was observed with the simultaneous use of Cu2+ and diazoxide; in addition, there was no protective effect of diazoxide against cell death, which also occurred in the presence of Cu2+. In conclusion, the relationships (functional, structural and/or regulatory) between mK(ATP), components of the mitochondrial electron transport chain (CI, CII-CIII and/or ATP synthase, CV) and mitochondrial permeability transition pores were discussed, as well as the role of these molecular structures in the mechanisms of the cytotoxic action of heavy metals.
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Affiliation(s)
- Elena A Belyaeva
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry RAS, Thorez av. 44, 194223, St.-Petersburg, Russia.
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Branca JJV, Pacini A, Gulisano M, Taddei N, Fiorillo C, Becatti M. Cadmium-Induced Cytotoxicity: Effects on Mitochondrial Electron Transport Chain. Front Cell Dev Biol 2020; 8:604377. [PMID: 33330504 PMCID: PMC7734342 DOI: 10.3389/fcell.2020.604377] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 11/05/2020] [Indexed: 12/26/2022] Open
Abstract
Cadmium (Cd) is a well-known heavy metal and environmental toxicant and pollutant worldwide, being largely present in every kind of item such as plastic (toys), battery, paints, ceramics, contaminated water, air, soil, food, fertilizers, and cigarette smoke. Nowadays, it represents an important research area for the scientific community mainly for its effects on public health. Due to a half-life ranging between 15 and 30 years, Cd owns the ability to accumulate in organs and tissues, exerting deleterious effects. Thus, even at low doses, a Cd prolonged exposure may cause a multiorgan toxicity. Mitochondria are key intracellular targets for Cd-induced cytotoxicity, but the underlying mechanisms are not fully elucidated. The present review is aimed to clarify the effects of Cd on mitochondria and, particularly, on the mitochondrial electron transport chain.
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Affiliation(s)
- Jacopo Junio Valerio Branca
- Department of Experimental and Clinical Medicine, Anatomy and Histology Section, University of Firenze, Firenze, Italy
| | - Alessandra Pacini
- Department of Experimental and Clinical Medicine, Anatomy and Histology Section, University of Firenze, Firenze, Italy
| | - Massimo Gulisano
- Department of Experimental and Clinical Medicine, Anatomy and Histology Section, University of Firenze, Firenze, Italy
| | - Niccolò Taddei
- Department of Experimental and Clinical Biomedical Sciences "Mario Serio", University of Firenze, Firenze, Italy
| | - Claudia Fiorillo
- Department of Experimental and Clinical Biomedical Sciences "Mario Serio", University of Firenze, Firenze, Italy
| | - Matteo Becatti
- Department of Experimental and Clinical Biomedical Sciences "Mario Serio", University of Firenze, Firenze, Italy
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Mitigating effect of paxilline against injury produced by Cd 2+ in rat pheochromocytoma PC12 and ascites hepatoma AS-30D cells. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 196:110519. [PMID: 32244116 DOI: 10.1016/j.ecoenv.2020.110519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 03/15/2020] [Accepted: 03/17/2020] [Indexed: 02/08/2023]
Abstract
On two rat cell lines, pheochromocytoma PC12 and ascites hepatoma AS-30D, and on rat liver mitochondria we studied action of paxilline (lipophilic mycotoxin from fungus Penicillium paxilli which is blocker of large-conductance potassium channels) against harmful effects of Cd(II) - one of the most dangerous toxic metals and environmental pollutants. We investigated an influence of paxilline on cell viability and mitochondrial function in the presence and in the absence of Cd2+. As found, paxilline protected partially from the Cd2+-induced cytotoxicity, namely taken in concentration of 1 μM it decreased the Cd2+-induced cell necrosis in average by 10-14 or 13-23% for AS-30D and PC12 cells, respectively. Nevertheless, paxilline did not affect the Cd2+-induced apoptosis of AS-30D cells. The alleviating concentration of paxilline reduced an intracellular production of reactive oxygen species (ROS) in PC12 cells intoxicated by Cd2+ and enhanced the ROS production in control AS-30D cells; however, it weakly affected mitochondrial membrane potential of the cells in the absence and in the presence of Cd2+. The ameliorative concentration of paxilline decreased the maximal respiration rates of control cells of both types after short-term (3-5 h) treatment with it while the rates reached their control levels after long-term (24-48 h) incubation with the drug. Paxilline was not protective against the Cd2+-induced membrane permeability and respiration rate changes in isolated rat liver mitochondria. As result, the mitochondrial electron transport chain was concluded to contribute in the mitigating effect of paxilline against the Cd2+-produced cell injury.
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Samet JM, Chen H, Pennington ER, Bromberg PA. Non-redox cycling mechanisms of oxidative stress induced by PM metals. Free Radic Biol Med 2020; 151:26-37. [PMID: 31877355 PMCID: PMC7803379 DOI: 10.1016/j.freeradbiomed.2019.12.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 12/13/2019] [Accepted: 12/20/2019] [Indexed: 12/27/2022]
Abstract
Metallic compounds contribute to the oxidative stress of ambient particulate matter (PM) exposure. The toxicity of redox inert ions of cadmium, mercury, lead and zinc, as well as redox-active ions of vanadium and chromium is underlain by dysregulation of mitochondrial function and loss of signaling quiescence. Central to the initiation of these effects is the interaction of metal ions with cysteinyl thiols on glutathione and key regulatory proteins, which leads to impaired mitochondrial electron transport and persistent pan-activation of signal transduction pathways. The mitochondrial and signaling effects are linked by the production of H2O2, generated from mitochondrial superoxide anion or through the activation of NADPH oxidase, which extends the range and amplifies the magnitude of the oxidative effects of the metals. This oxidative burden can be further potentiated by inhibitory effects of the metals on the enzymes of the glutathione and thioredoxin systems. Along with the better-known Fenton-based mechanisms, the non-redox cycling mechanisms of oxidative stress induced by metals constitute significant pathways for cellular injury induced by PM inhalation.
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Affiliation(s)
- James M Samet
- Environmental Public Health Division, Center for Public Health and Environmental Assessment, U.S. Environmental Protection Agency, Chapel Hill, NC, USA.
| | - Hao Chen
- Oak Ridge Institute for Science and Education, Oak Ridge, TN, USA
| | | | - Philip A Bromberg
- Center for Environmental Medicine, Asthma and Lung Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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Belyaeva EA. Respiratory complex II in mitochondrial dysfunction-mediated cytotoxicity: Insight from cadmium. J Trace Elem Med Biol 2018; 50:80-92. [PMID: 30262321 DOI: 10.1016/j.jtemb.2018.06.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Revised: 05/23/2018] [Accepted: 06/13/2018] [Indexed: 02/05/2023]
Abstract
In the present work we studied action of several inhibitors of respiratory complex II (CII) of mitochondrial electron transport chain, namely malonate and thenoyltrifluoroacetone (TTFA) on Cd2+-induced toxicity and cell mortality, using two rat cell lines, pheochromocytoma PC12 and ascites hepatoma AS-30D and isolated rat liver mitochondria (RLM). It was shown that malonate, an endogenous competitive inhibitor of dicarboxylate-binding site of CII, restored in part RLM respiratory function disturbed by Cd2+. In particular, malonate increased both phosphorylating and maximally uncoupled respiration rates in KCl medium in the presence of CI substrates as well as palliated changes in basal and resting state respiration rates produced by the heavy metal on the mitochondria energized by CI or CII substrates. Notably, malonate enhanced Cd2+-induced swelling of the mitochondria energized by CI substrates in KCl and, in a much lesser extent and at higher [Cd2+], in sucrose media but did not influence on the Cd2+ effects in NaCl medium. Besides, malonate did not affect swelling in sucrose media of RLM energized by CIV substrates under using of Cd2+ or Ca2+ whereas it strongly increased the mitochondrial swelling produced by selenite. In addition, malonate produced some protection against Cd2+-promoted necrotic death of AS-30D and PC12 cells and reduced intracellular reactive oxygen species (ROS) formation evoked by Cd2+ in PC12 cells. Importantly, TTFA, an irreversible competitive inhibitor of Q-binding site of CII, per se induced apoptosis of AS-30D cells which was inhibited by co-treatment with Cd2+ as well as decreased the Cd2+-enhanced intracellular ROS formation. In turn, decylubiquinone (dUb) at low μM concentrations did not protect AS-30D cells against the Cd2+-induced necrosis and enhanced the Cd2+-induced apoptosis of the cells. High μM concentrations of dUb were highly toxic for the cells. As consequence, the findings give new evidence indicative of critical involvement of CII in mechanism(s) of Cd2+-produced cytotoxicity and support the notion on CII as a perspective pharmacological target in mitochondria dysfunction-mediated conditions and diseases.
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Affiliation(s)
- Elena A Belyaeva
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry RAS, Thorez pr. 44, 194223, St.-Petersburg, Russia.
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8
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Grau-Perez M, Pichler G, Galan-Chilet I, Briongos-Figuero LS, Rentero-Garrido P, Lopez-Izquierdo R, Navas-Acien A, Weaver V, García-Barrera T, Gomez-Ariza JL, Martín-Escudero JC, Chaves FJ, Redon J, Tellez-Plaza M. Urine cadmium levels and albuminuria in a general population from Spain: A gene-environment interaction analysis. ENVIRONMENT INTERNATIONAL 2017; 106:27-36. [PMID: 28558300 DOI: 10.1016/j.envint.2017.05.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 04/07/2017] [Accepted: 05/10/2017] [Indexed: 05/19/2023]
Abstract
BACKGROUND The interaction of cadmium with genes involved in oxidative stress, cadmium metabolism and transport pathways on albuminuria can provide biological insight on the relationship between cadmium and albuminuria at low exposure levels. OBJECTIVES We tested the hypothesis that specific genotypes in candidate genes may confer increased susceptibility to cadmium exposure. METHODS Cadmium exposure was estimated by inductively coupled plasma mass spectrometry (ICPMS) in urine from 1397 men and women aged 18-85years participating in the Hortega Study, a representative sample of a general population from Spain. Urine albumin was measured by automated nephelometric immunochemistry. Abnormal albuminuria was defined as urine albumin greater than or equal to 30mg/g. RESULTS The weighted prevalence of abnormal albuminuria was 6.3%. The median level of urine cadmium was 0.39 (IQR, 0.23-0.65) μg/g creatinine. Multivariable-adjusted geometric mean ratios of albuminuria comparing the two highest to the lowest tertile of urine cadmium were 1.62 (95% CI, 1.43-1.84) and 2.94 (95% CI, 2.58-3.35), respectively. The corresponding odds ratios of abnormal albuminuria were 1.58 (0.83, 3.02) and 4.54 (2.58, 8.00). The association between urine cadmium and albuminuria was observed across all participant subgroups evaluated including participants without hypertension, diabetes or chronic kidney disease. We observed Bonferroni-corrected statistically significant interactions between urine cadmium levels and polymorphisms in gene SLC30A7 and RAC1. CONCLUSIONS Increasing urine cadmium concentrations were cross-sectionally associated with increased albuminuria in a representative sample of a general population from Spain. Genetic variation in oxidative stress and cadmium metabolism and transport genes may confer differential susceptibility to potential cadmium effects.
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Affiliation(s)
- Maria Grau-Perez
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, USA; Area of Cardiometabolic and Renal Risk, Institute for Biomedical Research INCLIVA, Valencia, Spain
| | - Gernot Pichler
- Area of Cardiometabolic and Renal Risk, Institute for Biomedical Research INCLIVA, Valencia, Spain; Department of Internal Medicine, Hospital Clínico de Valencia, University of Valencia, Spain
| | - Inma Galan-Chilet
- Genotyping and Genetic Diagnosis Unit, Institute for Biomedical Research INCLIVA, Valencia, Spain
| | | | - Pilar Rentero-Garrido
- Genotyping and Genetic Diagnosis Unit, Institute for Biomedical Research INCLIVA, Valencia, Spain
| | - Raul Lopez-Izquierdo
- Department of Internal Medicine, University Hospital Rio Hortega, Valladolid, Spain
| | - Ana Navas-Acien
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, USA; Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, USA
| | - Virginia Weaver
- Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, USA
| | - Tamara García-Barrera
- Department of Chemistry, Faculty of Experimental Science, University of Huelva, Huelva, Spain; Research Center of Health and Environment (CYSMA), University of Huelva, Huelva, Spain
| | - Jose L Gomez-Ariza
- Department of Chemistry, Faculty of Experimental Science, University of Huelva, Huelva, Spain; Research Center of Health and Environment (CYSMA), University of Huelva, Huelva, Spain
| | | | - F Javier Chaves
- Genotyping and Genetic Diagnosis Unit, Institute for Biomedical Research INCLIVA, Valencia, Spain; CIBER of Diabetes and Associated Metabolic Diseases (CIBERDEM), Barcelona, Spain
| | - Josep Redon
- Area of Cardiometabolic and Renal Risk, Institute for Biomedical Research INCLIVA, Valencia, Spain; CIBER Physiopathology of Obesity and Nutrition (CIBEROBN), Institute of Health Carlos III, Minister of Health, Madrid, Spain; Department of Internal Medicine, Hospital Clínico de Valencia, University of Valencia, Spain
| | - Maria Tellez-Plaza
- Area of Cardiometabolic and Renal Risk, Institute for Biomedical Research INCLIVA, Valencia, Spain; Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, USA.
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9
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Determination of the protein expression profiles of Propsilocerus akamusi (Tokunaga) Malpighian tubules response to cadmium stress by iTRAQ coupled LC–MS/MS. J Proteomics 2017; 164:85-93. [DOI: 10.1016/j.jprot.2017.05.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 04/29/2017] [Accepted: 05/16/2017] [Indexed: 12/17/2022]
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10
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To involvement the conformation of the adenine nucleotide translocase in opening the Tl(+)-induced permeability transition pore in Ca(2+)-loaded rat liver mitochondria. Toxicol In Vitro 2016; 32:320-32. [PMID: 26835787 DOI: 10.1016/j.tiv.2016.01.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Revised: 01/05/2016] [Accepted: 01/29/2016] [Indexed: 12/30/2022]
Abstract
The conformation of adenine nucleotide translocase (ANT) has a profound impact in opening the mitochondrial permeability transition pore (MPTP) in the inner membrane. Fixing the ANT in 'c' conformation by phenylarsine oxide (PAO), tert-butylhydroperoxide (tBHP), and carboxyatractyloside as well as the interaction of 4,4'-diisothiocyanostilbene-2,2'-disulfonate (DIDS) with mitochondrial thiols markedly attenuated the ability of ADP to inhibit the MPTP opening. We earlier found (Korotkov and Saris, 2011) that calcium load of rat liver mitochondria in medium containing TlNO3 and KNO3 stimulated the Tl(+)-induced MPTP opening in the inner mitochondrial membrane. The MPTP opening as well as followed increase in swelling, a drop in membrane potential (ΔΨmito), and a decrease in state 3, state 4, and 2,4-dinitrophenol-uncoupled respiration were visibly enhanced in the presence of PAO, tBHP, DIDS, and carboxyatractyloside. However, these effects were markedly inhibited by ADP and membrane-penetrant hydrophobic thiol reagent, N-ethylmaleimide (NEM) which fix the ANT in 'm' conformation. Cyclosporine A additionally potentiated these effects of ADP and NEM. Our data suggest that conformational changes of the ANT may be directly involved in the opening of the Tl(+)-induced MPTP in the inner membrane of Ca(2+)-loaded rat liver mitochondria. Using the Tl(+)-induced MPTP model is discussed in terms finding new transition pore inhibitors and inducers among different chemical and natural compounds.
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11
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Yadav N, Kumar S, Kumar R, Srivastava P, Sun L, Rapali P, Marlowe T, Schneider A, Inigo JR, O'Malley J, Londonkar R, Gogada R, Chaudhary AK, Yadava N, Chandra D. Mechanism of neem limonoids-induced cell death in cancer: Role of oxidative phosphorylation. Free Radic Biol Med 2016; 90:261-71. [PMID: 26627937 PMCID: PMC4734361 DOI: 10.1016/j.freeradbiomed.2015.11.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 11/01/2015] [Accepted: 11/23/2015] [Indexed: 12/17/2022]
Abstract
We have previously reported that neem limonoids (neem) induce multiple cancer cell death pathways. Here we dissect the underlying mechanisms of neem-induced apoptotic cell death in cancer. We observed that neem-induced caspase activation does not require Bax/Bak channel-mediated mitochondrial outer membrane permeabilization, permeability transition pore, and mitochondrial fragmentation. Neem enhanced mitochondrial DNA and mitochondrial biomass. While oxidative phosphorylation (OXPHOS) Complex-I activity was decreased, the activities of other OXPHOS complexes including Complex-II and -IV were unaltered. Increased reactive oxygen species (ROS) levels were associated with an increase in mitochondrial biomass and apoptosis upon neem exposure. Complex-I deficiency due to the loss of Ndufa1-encoded MWFE protein inhibited neem-induced caspase activation and apoptosis, but cell death induction was enhanced. Complex II-deficiency due to the loss of succinate dehydrogenase complex subunit C (SDHC) robustly decreased caspase activation, apoptosis, and cell death. Additionally, the ablation of Complexes-I, -III, -IV, and -V together did not inhibit caspase activation. Together, we demonstrate that neem limonoids target OXPHOS system to induce cancer cell death, which does not require upregulation or activation of proapoptotic Bcl-2 family proteins.
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Affiliation(s)
- Neelu Yadav
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA.
| | - Sandeep Kumar
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Rahul Kumar
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Pragya Srivastava
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Leimin Sun
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA; Gastroenterology Department, Sir Run Run Shaw Hospital, Zhejiang University Medical School, Hangzhou 310016, China
| | - Peter Rapali
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Timothy Marlowe
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Andrea Schneider
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Joseph R Inigo
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Jordan O'Malley
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Ramesh Londonkar
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Raghu Gogada
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Ajay K Chaudhary
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA
| | - Nagendra Yadava
- Pioneer Valley Life Sciences Institute, Springfield, MA 01107, USA
| | - Dhyan Chandra
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA.
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12
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Korotkov SM, Emelyanova LV, Konovalova SA, Brailovskaya IV. Tl+ induces the permeability transition pore in Ca2+-loaded rat liver mitochondria energized by glutamate and malate. Toxicol In Vitro 2015; 29:1034-41. [PMID: 25910914 DOI: 10.1016/j.tiv.2015.04.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2014] [Revised: 04/04/2015] [Accepted: 04/08/2015] [Indexed: 12/14/2022]
Abstract
It is known that Ca2+ and heavy metals more actively induce MPTP opening in mitochondria, energized by the I complex substrates. Thus, a rise in a Tl+-induced MPTP was proposed in experiments on isolated rat liver mitochondria energized by the complex I substrate (glutamate and malate). Expose of the mitochondria to Ca2+ into a medium containing TlNO3, glutamate, and malate as well as sucrose or KNO3 resulted in a decrease in state 3, state 4, or DNP-stimulated respiration as well as an increase of both mitochondrial swelling and ΔΨmito dissipation. The MPTP inhibitors, CsA and ADP, almost completely eliminated the effect of Ca2+, which was more pronounced in the presence of the complex I substrates than the complex II substrate (succinate) and rotenone (Korotkov and Saris, 2011). The present study concludes that Tl+-induced MPTP opening is more appreciable in mitochondria energized by glutamate and malate but not succinate in the presence of rotenone. We assume that the Tl+-induced MPTP opening along with followed swelling and possible structural deformations of the complex I in Ca2+-loaded mitochondria may be a part of the thallium toxicity mechanism on mitochondria in living organisms. At the same time, oxidation of Tl+ to Tl3+ by mitochondrial oxygen reactive species is proposed for the mechanism.
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Affiliation(s)
- Sergey M Korotkov
- Sechenov Institute of Evolutionary Physiology and Biochemistry, The Russian Academy of Sciences, Thorez pr. 44, 194223 St., Petersburg, Russian Federation.
| | - Larisa V Emelyanova
- Sechenov Institute of Evolutionary Physiology and Biochemistry, The Russian Academy of Sciences, Thorez pr. 44, 194223 St., Petersburg, Russian Federation
| | - Svetlana A Konovalova
- Sechenov Institute of Evolutionary Physiology and Biochemistry, The Russian Academy of Sciences, Thorez pr. 44, 194223 St., Petersburg, Russian Federation
| | - Irina V Brailovskaya
- Sechenov Institute of Evolutionary Physiology and Biochemistry, The Russian Academy of Sciences, Thorez pr. 44, 194223 St., Petersburg, Russian Federation
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Belyaeva EA, Emelyanova LV, Korotkov SM, Brailovskaya IV, Savina MV. On the mechanism(s) of membrane permeability transition in liver mitochondria of lamprey, Lampetra fluviatilis L.: insights from cadmium. BIOMED RESEARCH INTERNATIONAL 2014; 2014:691724. [PMID: 24995321 PMCID: PMC4065708 DOI: 10.1155/2014/691724] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 04/29/2014] [Accepted: 05/01/2014] [Indexed: 02/05/2023]
Abstract
Previously we have shown that opening of the mitochondrial permeability transition pore in its low conductance state is the case in hepatocytes of the Baltic lamprey (Lampetra fluviatilis L.) during reversible metabolic depression taking place in the period of its prespawning migration when the exogenous feeding is switched off. The depression is observed in the last year of the lamprey life cycle and is conditioned by reversible mitochondrial dysfunction (mitochondrial uncoupling in winter and coupling in spring). To further elucidate the mechanism(s) of induction of the mitochondrial permeability transition pore in the lamprey liver, we used Cd(2+) and Ca(2+) plus Pi as the pore inducers. We found that Ca(2+) plus Pi induced the high-amplitude swelling of the isolated "winter" mitochondria both in isotonic sucrose and ammonium nitrate medium while both low and high Cd(2+) did not produce the mitochondrial swelling in these media. Low Cd(2+) enhanced the inhibition of basal respiration rate of the "winter" mitochondria energized by NAD-dependent substrates whereas the same concentrations of the heavy metal evoked its partial stimulation on FAD-dependent substrates. The above changes produced by Cd(2+) or Ca(2+) plus Pi in the "winter" mitochondria were only weakly (if so) sensitive to cyclosporine A (a potent pharmacological desensitizer of the nonselective pore) added alone and they were not sensitive to dithiothreitol (a dithiol reducing agent). Under monitoring of the transmembrane potential of the "spring" lamprey liver mitochondria, we revealed that Cd(2+) produced its decrease on both types of the respiratory substrates used that was strongly hampered by cyclosporine A, and the membrane potential was partially restored by dithiothreitol. The effects of different membrane permeability modulators on the lamprey liver mitochondria function and the seasonal changes in their action are discussed.
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Affiliation(s)
- Elena A. Belyaeva
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, Thorez pr. 44, Saint Petersburg 194223, Russia
| | - Larisa V. Emelyanova
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, Thorez pr. 44, Saint Petersburg 194223, Russia
| | - Sergey M. Korotkov
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, Thorez pr. 44, Saint Petersburg 194223, Russia
| | - Irina V. Brailovskaya
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, Thorez pr. 44, Saint Petersburg 194223, Russia
| | - Margarita V. Savina
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, Thorez pr. 44, Saint Petersburg 194223, Russia
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Ivanina AV, Sokolova IM. Interactive effects of pH and metals on mitochondrial functions of intertidal bivalves Crassostrea virginica and Mercenaria mercenaria. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2013; 144-145:303-309. [PMID: 24211794 DOI: 10.1016/j.aquatox.2013.10.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 10/11/2013] [Accepted: 10/16/2013] [Indexed: 06/02/2023]
Abstract
Intertidal bivalves experience broad fluctuations of environmental temperature, pH and oxygen content which could change their intracellular pH. They are also exposed to trace metals such as cadmium (Cd) and copper (Cu) that accumulate in their tissues and may negatively affect mitochondrial functions and bioenergetics. We determined the interactive effects of pH and trace metals (25 μM Cd or Cu) on mitochondrial functions (including respiration and membrane potentials in both ADP-stimulated (state 3) and resting (state 4) states) of two common marine bivalves, the hard clams (Mercenaria mercenaria) and eastern oysters (Crassostrea virginica). In the absence of the trace metals, mitochondrial functions of C. virginica and M. mercenaria were insensitive to pH in a broad physiologically relevant range (6.6-7.8). Mitochondrial respiration was generally suppressed by 25 μM Cd or Cu (with the stronger effects observed for ADP-stimulated compared to the resting respiration) while the mitochondrial membrane potential was unaffected. pH modulated the effects of Cu and Cd on mitochondrial respiration of the bivalves. In oysters, Cu suppressed ADP-stimulated mitochondrial respiration at high and low pH values (6.6 and 7.8, respectively), but had no effect in the intermediate pH range (7.0-7.4). In clams, the negative effect of Cu on ADP-stimulated respiration was only observed at extremely high pH (7.8). A decrease in pH was also protective against Cd in mitochondria of clams and oysters. In clams, 25 μM Cd suppressed ADP-stimulated respiration at all pH; however, at low pH (6.6-7.0) this suppression was paralleled by a decrease in the rates of proton leak thereby effectively restoring mitochondrial coupling. In oysters, the inhibitory effects of Cd on ADP-stimulated respiration were fully abolished at low pH (6.6-7.0). This indicates that moderate acidosis (such as occurs during exposure to air, extreme salinities or elevated CO2 levels in the intertidal zone) may have a beneficial side-effect of protecting mitochondria of clams and oysters against the toxic effects of trace metals in polluted estuaries.
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Affiliation(s)
- Anna V Ivanina
- Department of Biology, University of North Carolina at Charlotte, Charlotte, NC, USA
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Fretham SJ, Caito S, Martinez-Finley EJ, Aschner M. Mechanisms and Modifiers of Methylmercury-Induced Neurotoxicity. Toxicol Res (Camb) 2012; 1:32-38. [PMID: 27795823 DOI: 10.1039/c2tx20010d] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The neurotoxic consequences of methylmercury (MeHg) exposure have long been known, however a complete understanding of the mechanisms underlying this toxicity is elusive. Recent epidemiological and experimental studies have provided many mechanistic insights, particularly into the contribution of genetic and environmental factors that interact with MeHg to modify toxicity. This review will outline cellular processes directly and indirectly affected by MeHg, including oxidative stress, cellular signaling and gene expression, and discuss genetic, environmental and nutritional factors capable of modifying MeHg toxicity.
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Affiliation(s)
- Stephanie Jb Fretham
- Department of Pediatrics and Department of Pharmacology, and the Kennedy Center for Research on Human Development, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Samuel Caito
- Department of Pediatrics and Department of Pharmacology, and the Kennedy Center for Research on Human Development, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Ebany J Martinez-Finley
- Department of Pediatrics and Department of Pharmacology, and the Kennedy Center for Research on Human Development, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Michael Aschner
- Department of Pediatrics and Department of Pharmacology, and the Kennedy Center for Research on Human Development, Vanderbilt University Medical Center, Nashville, TN, USA
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Belyaeva EA, Sokolova TV, Emelyanova LV, Zakharova IO. Mitochondrial electron transport chain in heavy metal-induced neurotoxicity: effects of cadmium, mercury, and copper. ScientificWorldJournal 2012; 2012:136063. [PMID: 22619586 PMCID: PMC3349094 DOI: 10.1100/2012/136063] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Accepted: 12/15/2011] [Indexed: 02/05/2023] Open
Abstract
To clarify the role of mitochondrial electron transport chain (mtETC) in heavy-metal-induced neurotoxicity, we studied action of Cd2+, Hg2+, and Cu2+ on cell viability, intracellular reactive oxygen species formation, respiratory function, and mitochondrial membrane potential of rat cell line PC12. As found, the metals produced, although in a different way, dose- and time-dependent changes of all these parameters. Importantly, Cd2+ beginning from 10 [mu]M and already at short incubation time (3 h) significantly inhibited the FCCP-uncoupled cell respiration; besides, practically the complete inhibition of the respiration was reached after 3 h incubation with 50 [mu]M Hg2+ or 500 [mu]M Cd2+, whereas even after 48 h exposure with 500 [mu]M Cu2+, only a 50% inhibition of the respiration occurred. Against the Cd2+-induced cell injury, not only different antioxidants and mitochondrial permeability transition pore inhibitors were protective but also such mtETC effectors as FCCP and stigmatellin (complex III inhibitor). However, all mtETC effectors used did not protect against the Hg2+- or Cu2+-induced cell damage. Notably, stigmatellin was shown to be one of the strongest protectors against the Cd2+-induced cell damage, producing a 15–20% increase in the cell viability. The mechanisms of the mtETC involvement in the heavy-metal-induced mitochondrial membrane permeabilization and cell death are discussed.
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Affiliation(s)
- Elena A Belyaeva
- I. M. Sechenov Institute of Evolutionary Physiology and Biochemistry of Russian Academy of Sciences, Thorez pr. 44, 194223 Saint-Petersburg, Russia.
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Mechanism(s) of Toxic Action of Zn and Selenite: A Study on AS-30D Hepatoma Cells and Isolated Mitochondria. Biochem Res Int 2011; 2011:387297. [PMID: 21860797 PMCID: PMC3154521 DOI: 10.1155/2011/387297] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Accepted: 06/06/2011] [Indexed: 02/05/2023] Open
Abstract
Mitochondria of AS-30D rat ascites hepatoma cells are found to be the main target for Zn2+ and sodium selenite (Na2SeO3). High [mu]M concentrations of Zn2+ or selenite were strongly cytotoxic, killing the AS-30D cells by both apoptotic and necrotic ways. Both Zn2+ and selenite produced strong changes in intracellular generation of reactive oxygen species (ROS) and the mitochondrial dysfunction via the mitochondrial electron transport chain (mtETC) disturbance, the membrane potential dissipation, and the mitochondrial permeability transition pore opening. The significant distinctions in toxic action of Zn2+ and selenite on AS-30D cells were found. Selenite induced a much higher intracellular ROS level (the early event) compared to Zn2+ but a lower membrane potential loss and a lower decrease of the uncoupled respiration rate of the cells, whereas the mtETC disturbance was the early and critical event in the mechanism of Zn2+ cytotoxicity. Sequences of events manifested in the mitochondrial dysfunction produced by the metal/metalloid under test are compared with those obtained earlier for Cd2+, Hg2+, and Cu2+ on the same model system.
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Metals - impact and implications. Interdiscip Toxicol 2011; 1:198-9. [PMID: 21218113 PMCID: PMC2993489 DOI: 10.2478/v10102-010-0039-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2008] [Revised: 08/12/2008] [Accepted: 08/15/2008] [Indexed: 11/20/2022] Open
Abstract
Impact of metal in vitro administration on rat tissue oxygen consumption is referred in the first part. Toxicological implications of in vivo metal administration to rats and the study of potential penetration of metal into the rat brain, which may eventually result in oxygen radical production are presented in second part.
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Influence of Tl(+) on mitochondrial permeability transition pore in Ca(2+)-loaded rat liver mitochondria. J Bioenerg Biomembr 2011; 43:149-62. [PMID: 21424245 DOI: 10.1007/s10863-011-9341-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2010] [Accepted: 12/27/2010] [Indexed: 12/17/2022]
Abstract
The Tl(+)-induced opening of the MPTP in Ca(2+)-loaded rat liver mitochondria energized by respiration on the substrates succinate or glutamate plus malate was recorded as increased swelling and dissipation of mitochondrial membrane potential as well as decreased state 4, or state 3, or 2,4-dinitrophenol-stimulated respiration. These effects of Tl(+) increased in nitrate media containing monovalent cations in the order of Li(+) < NH (4) (+) ≤ Na(+) < K(+). They were potentiated by inorganic phosphate and diminished by the MPTP inhibitors (ADP, CsA, Mg(2+), Li(+), rotenone, EGTA, and ruthenium red) both individually and more potently in their combinations. Maximal swelling of both non-energized and energized Ca(2+)-loaded mitochondria in rotenone-free media is an indication of Ca(2+) uptake driven by respiration on mitochondrial endogenous substrates. It is suggested that Tl(+) (distinct from Cd(2+), Hg(2+), and other heavy metals and regardless of the used respiratory substrates) can stimulate opening of the MPTP only in the presence of Ca(2+). We discuss the possible participation of Ca(2+)-binding sites, located near the respiratory complex I and the adenine nucleotide translocase, in inducing opening of the MPTP.
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Belyaeva EA, Korotkov SM, Saris NE. In vitro modulation of heavy metal-induced rat liver mitochondria dysfunction: a comparison of copper and mercury with cadmium. J Trace Elem Med Biol 2011; 25 Suppl 1:S63-73. [PMID: 21146384 DOI: 10.1016/j.jtemb.2010.10.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2010] [Accepted: 10/26/2010] [Indexed: 02/08/2023]
Abstract
Cadmium (Cd), mercury (Hg) and copper (Cu) are very toxic environmental pollutants that exert their cytotoxic effects as cations by targeting mitochondria. To further underscore molecular mechanism(s) underlying the heavy metal-induced mitochondrial dysfunction we continued to compare the action of Cd, Hg and Cu using a simple and convenient in vitro model, namely isolated rat liver mitochondria incubated in assay media of different ionic contents and energized by respiratory substrates, glutamate plus malate for complex I, succinate plus rotenone for complex II, and ascorbate plus tetramethylphenylenediamine for complex IV. With the help of various selective electrodes, fluorescent probes, isotope and spectrophotofluorometric techniques, significant differences were found in the modulating action of various substances affecting the activity of these respiratory chain complexes and mitochondrial Ca²+ uniporter or permeability transition pore effectors on the mitochondrial function disturbed by the heavy metals, including clear-cut substrate specificity of many effects of these cations. Sequence of events manifested in the mitochondrial dysfunction produced by the metals under test was elucidated.
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Affiliation(s)
- Elena A Belyaeva
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry RAS, Thorez pr. 44, 194223 St. Petersburg, Russia.
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Yazihan N, Mehtap Kacar Kocak, Akcil E, Erdem O, Sayal A. Role of midkine in cadmium-induced liver, heart and kidney damage. Hum Exp Toxicol 2010; 30:391-7. [DOI: 10.1177/0960327110372402] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Accumulation of the widespread environmental toxin cadmium (Cd) in tissues results in toxicity. Cd, which can induce a broad spectrum of biological effects, is a toxic substance and is associated with inflammation and apoptosis. Midkine (MK) has fibrinolytic, antiapoptotic, transforming, angiogenetic and chemotactic activities. After Cd toxicity, we found increased MK expression in liver cells in an in vitro cell culture model. The aim of this study was to determine the possibility of relationship between tissue MK expression levels, tumor necrosis factor α(TNF-α) levels and apoptosis in a chronic Cd toxicity model in rats. Male Wistar rats were exposed to Cd at the dose of 15 parts per million (ppm) for 8 weeks. MK levels were measured in kidney, heart and liver tissue by enzyme-linked-immunosorbent assay (ELISA). MK messenger RNA (mRNA) expression was evaluated by RT-PCR. Tissue apoptosis level was evaluated with tissue caspase-3 activity levels. Accumulation of Cd in liver is higher than the kidney and heart. Cd-treated rats had significantly higher tissue TNF-α and caspase-3 levels when compared with the control rats (p < 0.001). MK mRNA and protein levels were also significantly upregulated in the Cd-treated group (p < 0.05, p < 0.001, respectively). When compared with apoptosis in tissues, it was more prominent in the liver than kidney and heart. MK level is found increased 3, 1.7 and 1.3× folds in liver, kidney and heart, respectively. Our results showed that chronic Cd administration induces inflammation and apoptosis in rat liver, kidney and heart. MK involved in damage mechanisms of Cd-induced tissues. Further studies will show the underlying mechanism of increased MK expression in Cd toxicity.
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Affiliation(s)
- Nuray Yazihan
- Pathophysiology Department, Faculty of Medicine, Ankara University, Ankara, Turkey, Molecular Biology Unit, Ankara, Turkey,
| | - Mehtap Kacar Kocak
- Pathophysiology Department, Faculty of Medicine, Ankara University, Ankara, Turkey
| | - Ethem Akcil
- Pathophysiology Department, Faculty of Medicine, Ankara University, Ankara, Turkey
| | - Onur Erdem
- Department of Phamaceutical Toxicology, Gulhane Military Medical Academy, Ankara, Turkey
| | - Ahmet Sayal
- Department of Phamaceutical Toxicology, Gulhane Military Medical Academy, Ankara, Turkey
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Shemarova IV, Korotkov SM, Demina IN, Nesterov VP. Action of oxidative reactions in mitochondria on contractivity of heart muscle. Effects of Ni2+. J EVOL BIOCHEM PHYS+ 2010. [DOI: 10.1134/s0022093010020055] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Abstract
At the cellular level, cadmium (Cd) induces both damaging and repair processes in which the cellular redox status plays a crucial role. Being not redox-active, Cd is unable to generate reactive oxygen species (ROS) directly, but Cd-induced oxidative stress is a common phenomenon observed in multiple studies. The current review gives an overview on Cd-induced ROS production and anti-oxidative defense in organisms under different Cd regimes. Moreover, the Cd-induced oxidative challenge is discussed with a focus on damage and signaling as downstream responses. Gathering these data, it was clear that oxidative stress related responses are affected during Cd stress, but the apparent discrepancies observed in between the different studies points towards the necessity to increase our knowledge on the spatial and temporal ROS signature under Cd stress. This information is essential in order to reveal the exact role of Cd-induced oxidative stress in the modulation of downstream responses under a diverse array of conditions.
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Vojtíšek M, Knotková J, Kašparová L, Švandová E, Markvartová V, Tůma J, Vožeh F, Patková J. Metal, EMF, and Brain Energy Metabolism. Electromagn Biol Med 2009; 28:188-93. [DOI: 10.1080/15368370902724872] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Wang SH, Shih YL, Lee CC, Chen WL, Lin CJ, Lin YS, Wu KH, Shih CM. The role of endoplasmic reticulum in cadmium-induced mesangial cell apoptosis. Chem Biol Interact 2009; 181:45-51. [PMID: 19442655 DOI: 10.1016/j.cbi.2009.05.004] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2009] [Revised: 04/25/2009] [Accepted: 05/02/2009] [Indexed: 12/12/2022]
Abstract
Cd is an industrial and environmental pollutant that affects many organs in humans and other mammals. However, the molecular mechanisms of Cd-induced nephrotoxicity are unclear. In this study, we show that endoplasmic reticula (ER) played a pivotal role in Cd-induced apoptosis in mesangial cells. Using Fluo-3 AM, the intracellular concentration of calcium ([Ca(2+)](i)) was detected as being elevated as time elapsed after Cd treatment. Co-treatment with BAPTA-AM, a calcium chelator, was able to significantly suppress Cd-induced apoptosis. Calcineurin is a cytosolic phosphatase, which was able to dephosphorylate the inositol-1,4,5-triphosphate receptor (IP(3)R) calcium channel to prevent the release of calcium from ER. Cyclosporine A, a calcineurin inhibitor, increased both [Ca(2+)](i) and the percentage of Cd-induced apoptosis. However, EGTA and the IP(3)R inhibitor, 2-APB, were able to partially modulate Cd cytotoxicity. These results led us to suggest that the extracellular and ER-released calcium plays a crucial role in Cd-induced apoptosis in mesangial cells. Following this line, we further detected the ER stress after Cd treatment since ER is one of the major calcium storage organelles. After Cd exposure, GADD153, a hallmark of ER stress, was upregulated (at 4h of exposure), followed by activation of ER-specific caspase-12 and its downstream molecule caspase-3 (at 16h of exposure). The pan caspase inhibitor, Z-VAD, and BAPTA-AM were able to reverse the Cd-induced cell death and ER stress, respectively. Furthermore, the mitochondrial membrane potential (DeltaPsi(m)) was depolarized significantly and cytochrome c was released after 24h of exposure to Cd and followed by mild activation of caspase-9 at the 36-h time point, indicating that mitochondria stress is a late event. Therefore, we concluded that ER is the major killer organelle in Cd-induced mesangial cell apoptosis and that calcium oscillation plays a pivotal role.
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Affiliation(s)
- Sheng-Hao Wang
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan, ROC
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26
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Belyaeva EA, Dymkowska D, Wieckowski MR, Wojtczak L. Mitochondria as an important target in heavy metal toxicity in rat hepatoma AS-30D cells. Toxicol Appl Pharmacol 2008; 231:34-42. [PMID: 18501399 DOI: 10.1016/j.taap.2008.03.017] [Citation(s) in RCA: 98] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2007] [Revised: 02/12/2008] [Accepted: 03/22/2008] [Indexed: 02/05/2023]
Abstract
The mechanisms of toxic effects of divalent cations of three heavy metals Hg, Cd and Cu in rat ascites hepatoma AS-30D cells cultivated in vitro were compared. It was found that the toxicity of these ions, applied in the micromolar range (10-500 microM), decreased from Hg(2+) (most toxic) to Cu(2+) (least toxic). Hg(2+) and Cd(2+) produced a high percentage of cell death by both necrosis and apoptosis, whereas Cu(2+) at concentrations up to 500 microM was weakly effective. Hg(2+) at concentration of 10 microM appeared slightly uncoupling (i.e., stimulated resting state respiration and decreased the mitochondrial transmembrane potential), whereas it exerted a strong inhibitory effect on the respiratory chain and rapid dissipation of the membrane potential at higher concentrations. Cu(2+) had inhibitory effect on cell respiration only at 500 microM concentration and after incubation of 48 h but produced a significant uncoupling effect at lower concentrations. Cu(2+) induced an early and sharp increase of intracellular production of reactive oxygen species (ROS). The action of Hg(2+) and Cd(2+) on ROS generation was biphasic. They stimulated ROS generation within the cells at low concentrations and at short incubation times but decreased ROS generation at higher concentrations and at longer incubation. It is concluded that mitochondria are an important target for toxic effects of Hg(2+), Cd(2+) and Cu(2+) in AS-30D rat hepatoma cells.
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Affiliation(s)
- Elena A Belyaeva
- Laboratory of Comparative Biochemistry of Inorganic Ions, Sechenov Institute of Evolutionary Physiology and Biochemistry, Thorez pr. 44, 194223, St. Petersburg, Russia.
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Korotkov SM, Emel'yanova LV, Yagodina OV. Inorganic phosphate stimulates the toxic effects of Tl+in rat liver mitochondria. J Biochem Mol Toxicol 2008; 22:148-57. [DOI: 10.1002/jbt.20215] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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García N, Martínez-Abundis E, Pavón N, Chávez E. On the opening of an insensitive cyclosporin A non-specific pore by phenylarsine plus mersalyl. Cell Biochem Biophys 2007; 49:84-90. [PMID: 17906363 DOI: 10.1007/s12013-007-0047-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2007] [Revised: 11/30/1999] [Accepted: 07/17/2007] [Indexed: 01/08/2023]
Abstract
The purpose of this work was addressed to provide new information on the effect of thiol reagents on mitochondrial non-specific pore opening, and its response to cyclosporin A (CSA). To meet this proposal phenylarsine oxide (PHA) and mersalyl were employed as tools to induce permeability transition and CSA to inhibit it. PHA-induced mitochondrial dysfunction, characterized by Ca2+ efflux, swelling, and membrane de-energization, was inhibited by N-ethylmaleimide and CSA. Conversely, mersalyl failed to inhibit the inducing effect of phenylarsine oxide, it rather strengthened it. In addition, the effect of mersalyl was associated with cross-linking of membrane proteins. The content of membrane thiol groups accessible to react with PHA, mersalyl, and PHA plus mersalyl was determined. In all situations, permeability transition was accompanied by a significant decrease in the whole free membrane thiol content. Interestingly, it is also shown that mersalyl hinders the protective effect of cyclosporin A on PHA-induced matrix Ca2+ efflux.
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Affiliation(s)
- Noemí García
- Departamento de Bioquímica, Instituto Nacional de Cardiología, Ignacio Chávez, Juan Badiano # 1, Col. Sección XVI, Tlalpam, Mexico, DF, 014080, Mexico.
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Belyaeva EA, Dymkowska D, Wieckowski MR, Wojtczak L. Reactive oxygen species produced by the mitochondrial respiratory chain are involved in Cd2+-induced injury of rat ascites hepatoma AS-30D cells. BIOCHIMICA ET BIOPHYSICA ACTA 2006; 1757:1568-74. [PMID: 17069748 DOI: 10.1016/j.bbabio.2006.09.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2006] [Revised: 08/18/2006] [Accepted: 09/15/2006] [Indexed: 02/05/2023]
Abstract
Using AS-30D rat ascites hepatoma cells, we studied the modulating action of various antioxidants, inhibitors of mitochondrial permeability transition pore and inhibitors of the respiratory chain on Cd(2+)-produced cytotoxicity. It was found that Cd(2+) induced both necrosis and apoptosis in a time- and dose-dependent way. This cell injury involved dissipation of the mitochondrial transmembrane potential, respiratory dysfunction and initial increase of the generation of reactive oxygen species (ROS), followed by its decrease after prolonged incubation. Inhibitors of the mitochondrial permeability transition pore, cyclosporin A and bongkrekic acid, and inhibitors of respiratory complex III, stigmatellin and antimycin A, but not inhibitor of complex I, rotenone, partly prevented necrosis evoked by exposure of the cells to Cd(2+). Apoptosis of the cells was partly prevented by free radical scavengers and by preincubation with N-acetylcysteine. Stigmatellin, antimycin A and cyclosporin A also abolished Cd(2+)-induced increase in ROS generation. It is concluded that Cd(2+) toxicity in AS-30D rat ascites hepatoma, manifested by cell necrosis and/or apoptosis, involves ROS generation, most likely at the level of respiratory complex III, and is related to opening of the mitochondrial permeability transition pore.
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Affiliation(s)
- Elena A Belyaeva
- Nencki Institute of Experimental Biology, Pasteura 3, 02-093 Warsaw, Poland.
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Savina MV, Emelyanova LV, Belyaeva EA. Bioenergetic parameters of lamprey and frog liver mitochondria during metabolic depression and activity. Comp Biochem Physiol B Biochem Mol Biol 2006. [DOI: https://doi.org/10.1016/j.cbpb.2006.07.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Savina MV, Emelyanova LV, Belyaeva EA. Bioenergetic parameters of lamprey and frog liver mitochondria during metabolic depression and activity. Comp Biochem Physiol B Biochem Mol Biol 2006; 145:296-305. [PMID: 17070716 DOI: 10.1016/j.cbpb.2006.07.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2005] [Revised: 05/16/2006] [Accepted: 07/31/2006] [Indexed: 02/08/2023]
Abstract
The objective of this study is to elucidate the role of mitochondria in reversible metabolic depression of hepatocytes of the Baltic lamprey (Lampetra fluviatilis) taking place in the last year of its life cycle and to compare their main bioenergetic parameters with those of the frog (Rana temporaria) and the white outbred mouse (Mus musculus). Using isolated mitochondria as a model, we have revealed significant seasonal variations in the main bioenergetic parameters of the lamprey liver. These changes indicate that the metabolic depression is mediated by prolonged reversible alterations of mitochondrial functions, which manifest in low activity of the mitochondrial respiratory chain, low oxidative phosphorylation, low content of mitochondrial adenine nucleotides, high level of reduced mitochondrial pyridine nucleotides and leaky mitochondrial membranes observed in winter. The enhanced ion membrane permeability of winter lamprey liver mitochondria is found to be sensitive to EGTA and to cyclosporine A in combination with ADP and Mg(2+) and is likely mediated opening the mitochondrial permeability transition pore in its low conductance state. The sharp activation of oxidation and phosphorylation in the lamprey liver mitochondria followed by spawning and death of the animal is observed in spring. The possible causes of the phenomenon and the differences obtained between lamprey, frog and mouse are under discussion.
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Affiliation(s)
- Margarita V Savina
- Laboratory of Comparative Biochemistry of Inorganic Ions, Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, Thorez pr. 44, 194223 St.-Petersburg, Russia.
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