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Montserrat-Mesquida M, Ferrer MD, Pons A, Sureda A, Capó X. Effects of chronic hydrogen peroxide exposure on mitochondrial oxidative stress genes, ROS production and lipid peroxidation in HL60 cells. Mitochondrion 2024; 76:101869. [PMID: 38467292 DOI: 10.1016/j.mito.2024.101869] [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: 11/30/2023] [Revised: 02/25/2024] [Accepted: 03/07/2024] [Indexed: 03/13/2024]
Abstract
Hydrogen peroxide (H2O2) is a reactive species that is also involved in the redox regulation of cells because of it is relative stability. In numerous pathological situations, a chronic increase in the production of reactive species is observed, which is related to oxidative stress and cellular damage. This study aimed to evaluate the effects of long-term exposure to different H2O2 concentrations on oxidative stress biomarkers and mitochondrial dynamics in HL60 cells. HL60 cells were treated with a sustained production (0.1, 1.0 and 10.0 nM/s) of H2O2 for one hour. H2O2 production and malondialdehyde (MDA) levels, as a lipid peroxidation marker, increased progressively in HL60 cells in accordance with higher H2O2 exposure, with significant differences between the 10 nM/s H2O2 group and the control and 0.1 nM/s groups. Similarly, progressive increased expression in genes related to the mitochondrial antioxidant defences and mitochondrial dynamics were also observed. Significantly increased gene expression in the 10 nM/s H2O2 with respect to the control group was observed for manganese superoxide dismutase (MnSOD), peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PCG1α), nuclear respiratory factor 2 (Nrf2), mitochondrial transcription factor A (Tfam), mitofusins 1 and 2 (Mfn1 and Mfn2) and uncoupling protein 3 (UCP3), whereas no significant changes were observed in the cytochrome c oxidase subunit IV (COXIV) gene expression. In conclusion, exposure to different sustained production of H2O2 is related to a progressive increase in the gene expression of mitochondrial dynamics and redox processes in HL60 cells, but also to oxidative damage at higher H2O2 production levels.
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Affiliation(s)
- M Montserrat-Mesquida
- Research Group in Community Nutrition and Oxidative Stress, University of the Balearic Islands-IUNICS, 07122 Palma, Spain; Health Research Institute of Balearic Islands (IdISBa), 07120 Palma, Spain; CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), 28029 Madrid, Spain
| | - M D Ferrer
- Research Group in Community Nutrition and Oxidative Stress, University of the Balearic Islands-IUNICS, 07122 Palma, Spain
| | - A Pons
- Research Group in Community Nutrition and Oxidative Stress, University of the Balearic Islands-IUNICS, 07122 Palma, Spain; Health Research Institute of Balearic Islands (IdISBa), 07120 Palma, Spain; CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), 28029 Madrid, Spain
| | - A Sureda
- Research Group in Community Nutrition and Oxidative Stress, University of the Balearic Islands-IUNICS, 07122 Palma, Spain; Health Research Institute of Balearic Islands (IdISBa), 07120 Palma, Spain; CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), 28029 Madrid, Spain.
| | - X Capó
- Research Group in Community Nutrition and Oxidative Stress, University of the Balearic Islands-IUNICS, 07122 Palma, Spain; Translational Research in Aging and Longevity (TRIAL) Group, Health Research Institute of the Balearic Islands (IdISBa), 07120 Palma, Spain
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Frolova AS, Chepikova OE, Deviataikina AS, Solonkina AD, Zamyatnin AA. New Perspectives on the Role of Nuclear Proteases in Cell Death Pathways. BIOLOGY 2023; 12:797. [PMID: 37372081 DOI: 10.3390/biology12060797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 05/26/2023] [Accepted: 05/29/2023] [Indexed: 06/29/2023]
Abstract
Multiple factors can trigger cell death via various pathways, and nuclear proteases have emerged as essential regulators of these processes. While certain nuclear proteases have been extensively studied and their mechanisms of action are well understood, others remain poorly characterized. Regulation of nuclear protease activity is a promising therapeutic strategy that could selectively induce favorable cell death pathways in specific tissues or organs. Thus, by understanding the roles of newly discovered or predicted nuclear proteases in cell death processes, we can identify new pharmacological targets for improving therapeutic outcomes. In this article, we delved into the role of nuclear proteases in several types of cell death and explore potential avenues for future research and therapeutic development.
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Affiliation(s)
- Anastasia S Frolova
- Institute of Molecular Medicine, Sechenov First Moscow State Medical University, 119991 Moscow, Russia
- Scientific Center for Genetics and Life Sciences, Division of Biotechnology, Sirius University of Science and Technology, 354340 Sochi, Russia
| | - Olga E Chepikova
- Institute of Molecular Medicine, Sechenov First Moscow State Medical University, 119991 Moscow, Russia
- Scientific Center for Genetics and Life Sciences, Division of Biotechnology, Sirius University of Science and Technology, 354340 Sochi, Russia
| | - Anna S Deviataikina
- Institute of Biodesign and Complex Systems Modeling, Sechenov First Moscow State Medical University, 119435 Moscow, Russia
| | - Alena D Solonkina
- Institute of Biodesign and Complex Systems Modeling, Sechenov First Moscow State Medical University, 119435 Moscow, Russia
| | - Andrey A Zamyatnin
- Institute of Molecular Medicine, Sechenov First Moscow State Medical University, 119991 Moscow, Russia
- Scientific Center for Genetics and Life Sciences, Division of Biotechnology, Sirius University of Science and Technology, 354340 Sochi, Russia
- Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, 119992 Moscow, Russia
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia
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Torii-Goto A, Yoshimi A, Tashiro Y, Ukigai M, Matsumoto A, Ozaki N, Noda Y. A Reactive Metabolite of Clozapine Induces Hematopoietic Toxicity in HL-60 Cells Undergoing Granulocytic Differentiation through Its Effect on Glutathione Metabolism. Biol Pharm Bull 2022; 45:1232-1237. [DOI: 10.1248/bpb.b22-00045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Aya Torii-Goto
- Division of Clinical Sciences and Neuropsychopharmacology, Faculty and Graduate School of Pharmacy, Meijo University
| | - Akira Yoshimi
- Department of Psychiatry, Nagoya University Graduate School of Medicine
| | - Yuko Tashiro
- Division of Clinical Sciences and Neuropsychopharmacology, Faculty and Graduate School of Pharmacy, Meijo University
| | - Mako Ukigai
- Division of Clinical Sciences and Neuropsychopharmacology, Faculty and Graduate School of Pharmacy, Meijo University
| | - Aoi Matsumoto
- Division of Clinical Sciences and Neuropsychopharmacology, Faculty and Graduate School of Pharmacy, Meijo University
| | - Norio Ozaki
- Department of Psychiatry, Nagoya University Graduate School of Medicine
| | - Yukihiro Noda
- Division of Clinical Sciences and Neuropsychopharmacology, Faculty and Graduate School of Pharmacy, Meijo University
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Li XY, Wei F, Gao JS, Wang HY, Zhang YH. Oxidative stress and hepatotoxicity of Rana chensinensis exposed to low doses of octylphenol. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2018; 64:86-93. [PMID: 30312849 DOI: 10.1016/j.etap.2018.09.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 09/15/2018] [Accepted: 09/24/2018] [Indexed: 06/08/2023]
Abstract
This study investigated the effects of low doses of octylphenol (OP) on the oxidative stress and hepatotoxicity in amphibian liver. The frog, Rana chensinensis, were exposed to 10-8, 10-7, 10-6 mol/L OP for 10, 20 and 30 days. The activities of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) in liver were reduced at first, then recovered slightly, and the content of malondialdehyde (MDA) and hydrogen peroxide (H2O2) were increased significantly. Histopathology showed that in some liver tissues of OP treated frogs, the hematococoel expansion, the fat accumulation, the cytoplasmic vacuolization and even hepatocyte necrosis were present. Ultrastructure revealed that there were lipid droplet accumulation, mitochondria deformation and nuclear condensation in some hepatocytes. These results confirm that low doses OP exposure can give rise to oxidative stress in the liver of frogs, reduce antioxidant enzymes activities, lead to partial organelles damage in hepatocyte and the fat accumulate in hepatic tissue.
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Affiliation(s)
- Xin-Yi Li
- College of Life Science, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, China
| | - Fang Wei
- College of Life Science, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, China
| | - Jin-Shu Gao
- College of Life Science, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, China
| | - Hong-Yuan Wang
- College of Life Science, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, China
| | - Yu-Hui Zhang
- College of Life Science, Shaanxi Normal University, 199 South Chang'an Road, Xi'an, 710062, China.
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Ghanbari H, Keshtgar S, Kazeroni M. Inhibition of the CatSper Channel and NOX5 Enzyme Activity Affects the Functions of the Progesterone-Stimulated Human Sperm. IRANIAN JOURNAL OF MEDICAL SCIENCES 2018; 43:18-25. [PMID: 29398748 PMCID: PMC5775990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND Low levels of reactive oxygen species (ROS) and calcium are necessary for sperm function. NADPH oxidase 5 (NOX5) is a membrane enzyme which produces ROS. This enzyme is dependent on calcium for its activity. We investigated the importance of NOX5 and an important calcium channel (CatSper) on sperm function. METHODS This laboratory in-vitro study was done in Shiraz, Iran, 2016. Normal semen samples (n=24) were washed and diluted to 20×106 sperm/mL. The diluted samples were divided into 8 groups, containing Ham's F-10 (control group), 2 µM of NNC (CatSper channel inhibitor), 1 µM DPI (NOX5 inhibitor), and NNC+DPI. The other 4 groups were the same as the 1st ones, except that they contained 1 µM of progesterone. Motility assessment was done by VT-Sperm 3.1. Acrosome status was monitored with acrosome-specific FITC-PSA using fluorescent microscopy. Sperm viability was assessed by Eosin Y. Statistical analysis was performed using SPSS 16 software. The comparison between the groups was done using the one-way ANOVA, followed by Tukey. A P<0.05 was considered significant. RESULTS The percentage of motile sperm, sperm velocity, and viability decreased significantly in the groups containing NNC. DPI reduced sperm progressive motility only in the progesterone-stimulated condition. Progesterone induced acrosome reaction, but this effect was inhibited by NNC and DPI. CONCLUSION CatSper had a prominent role in the motility, acrosome reaction, and viability of the human sperm. The function of NOX5 was important only in the stimulated sperm. We conclude that CatSper has a more prominent role than NOX5 activity. The functional relation between NOX5 and CatSper is not clear but is very probable.
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Affiliation(s)
- Hamideh Ghanbari
- Department of Physiology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Sara Keshtgar
- Department of Physiology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran,Correspondence: Sara Keshtgar, PhD; Department of Physiology, School of Medicine, Zand Blvd., Postal Code: 71348-45794, Shiraz, Iran Tel/Fax: +98 71 32302026
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Guo D, Wang YW, Ma J, Yan L, Li TF, Han XW, Shui SF. Study on the role of Cathepsin B and JNK signaling pathway in the development of cerebral aneurysm. ASIAN PAC J TROP MED 2016; 9:499-502. [PMID: 27261862 DOI: 10.1016/j.apjtm.2016.03.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 02/16/2016] [Accepted: 03/15/2016] [Indexed: 10/22/2022] Open
Abstract
OBJECTIVE To investigate the correlation between JNK signal and the apoptosis of VSMC as well as the expression of Cathepsin B and to explore the role of JNK signal in the development of cerebral aneurysm. METHODS Rat models of cerebral aneurysm were established and histopathologic changes of cerebral aneurysm and the apoptosis of VSMC were analyzed. Rat models were respectively subject to subcutaneous injection of Cathepsin B siRNA and JNK inhibitor SP600125. Western blot technique was used to detect the expression of proteins like Cathepsin B, Caspase-3, and p-JNK. Spearman's rho was used to examine the correlation between p-JNK and Cathepsin B, as well as the expression of relevant proteins. RESULTS The success rate of modeling rats with cerebral aneurysm was 88.75%. After the respective injection of Cathepsin B siRNA, SP600125 and their combination, the cell densities of VSMC of rats with cerebral aneurysm all increased significantly (P < 0.05 or P < 0.01), but the apoptosis rate of VSMC decreased significantly (P < 0.01). Compared with normal rats, the expression of Cathepsin B, Caspase-3 and p-JNK in Cerebral aneurysm models increased significantly. Effectively intervening Cathepsin B genes with Cathepsin B siRNA could significantly inhibit the expression of Cathepsin B and Caspase-3, but hardly influence the expression of p-JNK. JNK inhibitor SP600125 had no influence on the expression of Cathepsin B and Caspase-3, but effectively inhibited the expression of p-JNK. In cerebral aneurysm tissues, positive correlation was observed between the expression of p-JNK and Cathepsin B, the correlation coefficient was r = 0.640. CONCLUSION After the attack of cerebral aneurysm, proteins like Cathepsin B, Caspase-3 and p-JNK are all involved in the apoptosis of VSMCs. This process may be realized by Cathepsin B which activates the apoptosis mechanism of Caspase-3 and mediate the apoptosis of VSMC through the JNK signaling pathway. Therefore, silencing Cathepsin B gene or inhibiting the conduction through JNK signaling pathway can mitigate the apoptosis of vascular smooth muscle cells in cerebral aneurysm.
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Affiliation(s)
- Dong Guo
- Department of Radiology Intervention, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Ye-Wei Wang
- Department of Radiology Intervention, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Ji Ma
- Department of Radiology Intervention, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Lei Yan
- Department of Radiology Intervention, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Teng-Fei Li
- Department of Radiology Intervention, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xin-Wei Han
- Department of Radiology Intervention, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Shao-Feng Shui
- Department of Radiology Intervention, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
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Wang F, Bexiga MG, Anguissola S, Boya P, Simpson JC, Salvati A, Dawson KA. Time resolved study of cell death mechanisms induced by amine-modified polystyrene nanoparticles. NANOSCALE 2013; 5:10868-76. [PMID: 24108393 DOI: 10.1039/c3nr03249c] [Citation(s) in RCA: 125] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Positively charged polymers and nanoparticles (NPs) can be toxic to cells in various systems. Using human astrocytoma cells, we have previously shown that 50 nm amine-modified polystyrene NPs damage mitochondria and induce cell death by apoptosis. Here we provide comprehensive details of the cellular events occurring after exposure to the NPs in a time-resolved manner. We demonstrate that the accumulation of NPs in lysosomes plays a central role in the observed cell death, leading to swelling of the lysosomes and release of cathepsins into the cytosol, which ultimately propagates the damage to the mitochondria with subsequent activation of apoptosis. This is accompanied and sustained by other events, such as increasing ROS levels and autophagy. Using various inhibitors, we also show the interplay between apoptosis and autophagy as a response to NP accumulation in lysosomes.
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Affiliation(s)
- Fengjuan Wang
- Centre for BioNano Interactions and Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland.
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Stefin B deficiency reduces tumor growth via sensitization of tumor cells to oxidative stress in a breast cancer model. Oncogene 2013; 33:3392-400. [DOI: 10.1038/onc.2013.314] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 05/19/2013] [Accepted: 06/17/2013] [Indexed: 12/20/2022]
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Abstract
The endocytic pathway is a system specialized for the uptake of compounds from the cell microenvironment for their degradation. It contains an arsenal of hydrolases, including proteases, which are normally enclosed in membrane-bound organelles, but if released to the cytosol can initiate apoptosis signaling pathways. Endogenous and exogenous compounds have been identified that can mediate destabilization of lysosomal membranes, and it was shown that lysosomal proteases are not only able to initiate apoptotic signaling but can also amplify the apoptotic pathways initiated in other cellular compartments. The endocytic pathway also receives cargo destined for degradation via the autophagic pathway. By recycling energy and biosynthetic substrates, and by degrading damaged organelles and molecules, the endocytic system assists the autophagic system in resisting apoptotic stimuli. Steps leading to lysosomal membrane permeabilization and subsequent triggering of cell death as well as the therapeutic potential of intervention in lysosomal membrane permeabilization will be discussed.
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Affiliation(s)
- Urška Repnik
- Department of Biochemistry and Molecular and Structural Biology, J. Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
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Protective effects and mechanism of Panax Notoginseng saponins on oxidative stress-induced damage and apoptosis of rabbit bone marrow stromal cells. Chin J Integr Med 2010; 16:525-30. [PMID: 21110178 DOI: 10.1007/s11655-010-0566-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2009] [Indexed: 11/27/2022]
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Repnik U, Turk B. Lysosomal-mitochondrial cross-talk during cell death. Mitochondrion 2010; 10:662-9. [PMID: 20696281 DOI: 10.1016/j.mito.2010.07.008] [Citation(s) in RCA: 134] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2010] [Revised: 07/15/2010] [Accepted: 07/23/2010] [Indexed: 12/25/2022]
Abstract
Lysosomes are membrane-bound organelles, which contain an arsenal of different hydrolases, enabling them to act as the terminal degradative compartment of the endocytotic, phagocytic and autophagic pathways. During the last decade, it was convincingly shown that destabilization of lysosomal membrane and release of lysosomal content into the cytosol can initiate the lysosomal apoptotic pathway, which is dependent on mitochondria destabilization. The cleavage of BID to t-BID and degradation of anti-apoptotic BCL-2 proteins by lysosomal cysteine cathepsins were identified as links to the mitochondrial cytochrome c release, which eventually leads to caspase activation. There have also been reports about the involvement of lysosome destabilization and lysosomal proteases in the extrinsic apoptotic pathway, although the molecular mechanism is still under debate. In the present article, we discuss the cross-talk between lysosomes and mitochondria during apoptosis and its consequences for the fate of the cell.
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Affiliation(s)
- Urška Repnik
- Department of Biochemistry and Molecular and Structural Biology, Jozef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia.
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Qiang H, Wang KZ, Shi ZB, Fan LH. Panax notoginseng saponins protect rabbit bone marrow stromal cells from hydrogen peroxide-induced apoptosis. ZHONG XI YI JIE HE XUE BAO = JOURNAL OF CHINESE INTEGRATIVE MEDICINE 2010; 8:131-137. [PMID: 20141735 DOI: 10.3736/jcim20100207] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
OBJECTIVE To investigate the effects of Panax notoginseng saponins (PNSs) on hydrogen peroxide-induced apoptosis in rabbit bone marrow stromal cells (BMSCs). METHODS BMSCs were isolated from 2-month-old New Zealand rabbits and cultured with different doses of PNSs to determine the most effective dose of PNSs by 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT) assay and alkaline phosphatase (ALP) assay. The most effective dose of PNSs was used in subsequent experiments. Apoptosis of BMSCs was induced by hydrogen peroxide (100 micromol/L). BMSCs in PNSs group were also pretreated with PNSs before hydrogen peroxide exposure. Reactive oxygen species (ROSs) levels were measured by using 2',7'-dichlorodihydrofluorescein diacetate. Apoptosis rate of BMSCs was observed by flow cytometry after staining with Annexin V-fluorescein isothiocyanate/propidium iodide. The protein expression of Bax in BMSCs was analyzed by Western blotting. Activity of caspase-3 was measured by spectrofluorometry. RESULTS The most effective dose of PNSs was 0.1g/L. PNSs at dose of 0.1g/L markedly reversed the augmentation of ROS level, decreased the apoptosis rate of, and the Bax expression and activity of caspase-3 in BMSCs treated with hydrogen peroxide (P<0.01). CONCLUSION PNSs can protect cultured rabbit BMSCs from hydrogen peroxide-induced apoptosis by decreasing oxidative stress, Bax expression and caspase-3 activity.
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Affiliation(s)
- Hui Qiang
- Department of Orthopedics, the Second Affiliated Hospital, Xi'an Jiaotong University College of Medicine, Xi'an 710004, Shaanxi Province, China
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Qiang H, Gao P, Zhang C, Shi Z, Wang T, Wang L, Wang K. Effects of Panax notoginseng saponins on apoptosis induced by hydrogen peroxide in cultured rabbit bone marrow stromal cells via altering the oxidative stress level and down-regulating caspase-3. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/s1007-4376(09)60085-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Hayashi MA, Nascimento FD, Kerkis A, Oliveira V, Oliveira EB, Pereira A, Rádis-Baptista G, Nader HB, Yamane T, Kerkis I, Tersariol IL. Cytotoxic effects of crotamine are mediated through lysosomal membrane permeabilization. Toxicon 2008; 52:508-17. [DOI: 10.1016/j.toxicon.2008.06.029] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2008] [Revised: 06/21/2008] [Accepted: 06/24/2008] [Indexed: 11/16/2022]
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15
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Jing XB, Cai XB, Hu H, Chen SZ, Chen BM, Cai JY. Reactive oxygen species and mitochondrial membrane potential are modulated during CDDP-induced apoptosis in EC-109 cells. Biochem Cell Biol 2007; 85:265-71. [PMID: 17534409 DOI: 10.1139/o07-014] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
cis-Diamminedichloroplatinum (CDDP), commonly know as cisplatin, is a well known DNA-damaging agent, which is highly active in suppressing the proliferation of tumor cells. However, it is not clear that CDDP can induce growth inhibition of esophagus cancer cells. Using the cell line EC-109 from the esophagus, we found that CDDP would induce apoptotic responses. The addition of CDDP to cells led to the inhibition of growth in a time- and dose-dependent manner. CDDP generated reactive oxygen species (ROSs) in cells, which brought about a reduction in the intracellular mitochondrial transmembrane potential (Deltapsim), leading to apoptosis. Our findings demonstrate that ROSs, and the resulting oxidative stress, play a pivotal role in apoptosis. Preincubation of EC-109 cells with the hydrogen-peroxide-scavenging enzyme catalase partially inhibited the following: (i) the production of ROS; (ii) the disruption of the Deltapsim; and (iii) apoptosis. These results indicate that the enhancement of the generation of ROS and the disruption of Deltapsim are events involved in the apoptotic pathway of EC-109 induced by CDDP.
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Affiliation(s)
- Xu-Bin Jing
- Department of Gastroenterology, The First Affiliated Hospital, Shantou University Medical College, 57 Chang Ping Road, Shantou 515041, Guangdong Province, China.
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Wang Y, Qiao B, Wang Y, Han X, Chu Y, Xiong S. Autoantibodies closely relate to the elevation level of in vivo hydrogen peroxide and tissue damage in systemic lupus erythematosus. DNA Cell Biol 2006; 25:563-70. [PMID: 17132087 DOI: 10.1089/dna.2006.25.563] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Recent studies have shown that antibodies efficiently catalyze the conversion of molecular singlet oxygen (1O2) plus water to hydrogen peroxide (H2O2). H2O2 is toxic to cells and is a cause of further free radical generation that are implicated in the pathogenesis of a variety of diseases. Systemic lupus erythematosus (SLE) is one of the most serious autoimmune diseases which are characterized by the production of various autoantibodies and subsequent tissue damage. However, the correlation of autoantibodies, H2O2, and tissue lesion in SLE has not been yet investigated. To address this issue, in the present study, we induced autoantibodies and kidney tissue damage by using SLE animal model as described previously. We detected the level of H2O2 in SLE mice and found the increase of in vivo H2O2 was accompanied and closely correlated with the production of anti-dsDNA and antihistone antibodies. Importantly, there was onefold increase of H2O2 in the mice kidneys with apparent glomerulonephritis and IgG deposits. These results suggest that the induced autoantibodies possess catalytic activity. The produced autoantibodies lead to the production and elevation of H2O2, which results in subsequent renal damage and the pathogenesis of SLE. Our findings provide an insight into the understanding of SLE mechanism and provide a potential approach for therapeutic intervention of SLE.
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Affiliation(s)
- Yongquan Wang
- Institute for Immunobiology and Department of Immunology, Shanghai Medical College of Fudan University, Shanghai, People's Republic of China
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Abstract
Redox regulated events are fundamental to our understanding of many cellular pathways and pathological processes. On the one hand, production of reactive oxygen species by mammalian spermatozoa has been associated with a loss of cell function and DNA integrity as a consequence of oxidative stress. These cells are exquisitely sensitive to such damage as a consequence of their relative lack of cytosolic antioxidant enzymes and relative abundance of polyunsaturated fatty acids. Given this susceptibility, it is surprising to discover that spermatozoa are intensely redox active cells and professional generators of reactive oxygen species. The latter are physiologically important to the spermatozoa in regulating every aspect of sperm function examined, including their movement characteristics, capacitation, sperm-zona interaction, the acrosome reaction and sperm-oocyte fusion. The molecular basis of this redox drive is still poorly understood in terms of the source of the reactive oxygen species and the mechanisms by which these reactive metabolites enhance sperm function. Recent advances include the discovery of NOX5 in the male germ line and elucidation of the role of reactive oxygen species in controlling a unique signal transduction cascade associated with sperm capacitation. Given the central importance of redox chemistry in the control of sperm function further research in this area may uncover valuable targets for contraceptive intervention.
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Affiliation(s)
- Mark A Baker
- Discipline of Biological Sciences, School of Environmental and Life Sciences and ARC Centre of Excellence in Biotechnology and Development, The University of Newcastle, Newcastle, NSW 2308, Australia
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Shukla A, Stern M, Lounsbury KM, Flanders T, Mossman BT. Asbestos-induced apoptosis is protein kinase C delta-dependent. Am J Respir Cell Mol Biol 2003; 29:198-205. [PMID: 12626342 DOI: 10.1165/rcmb.2002-0248oc] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Alveolar epithelial and mesothelial cells undergo apoptosis in response to asbestos, a phenomenon that may be important in injury and/or initiation of compensatory proliferation. Here, we report a functional role of protein kinase (PKC)delta in apoptosis by crocidolite asbestos. We first show that asbestos increases the kinase activity of PKC delta in alveolar type II epithelial cells (C10 line) and causes its translocation to mitochondria, events associated with caspase-9 cleavage and apoptosis as detected by the Apostain technique. Pretreatment of C10 cells with rottlerin (Rot), a PKC delta-selective inhibitor, before addition of asbestos prevented cleavage of caspase-9 and blocked the appearance of apoptotic cells. Asbestos-induced apoptosis also was inhibited in cells stably expressing a dominant-negative kinase-deficient mutant of PKC delta (dnPKC delta), but not dnPKC alpha. Activities of PKC alpha and PKC zeta increased after exposure to asbestos, but neither isoform migrated to mitochondria. A general inhibitor of PKCs, bisindolylmaleimide I, had no effect on asbestos-induced apoptosis. Hydrogen peroxide (H2O2) induced activation of PKCs delta, alpha, zeta, and theta, translocation of PKC delta to mitochondria, and caspase-9 cleavage. However, H2O2-induced apoptosis was not inhibited by cell lines stably expressing either dnPKC delta or dnPKC alpha, suggesting that activation of PKC delta has a distinct role in the development of asbestos-induced apoptosis.
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Affiliation(s)
- Arti Shukla
- Department of Pathology, University of Vermont College of Medicine, 89 Beaumont Avenue, Burlington, VT 05405, USA
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