51
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Zeb A. Ellagic acid in suppressing in vivo and in vitro oxidative stresses. Mol Cell Biochem 2018; 448:27-41. [PMID: 29388153 DOI: 10.1007/s11010-018-3310-3] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2017] [Accepted: 01/27/2018] [Indexed: 01/20/2023]
Abstract
Oxidative stress is a biological condition produced by a variety of factors, causing several chronic diseases. Oxidative stress was, therefore, treated with natural antioxidants, such as ellagic acid (EA). EA has a major role in protecting against different diseases associated with oxidative stress. This review critically discussed the antioxidant role of EA in biological systems. The in vitro and in vivo studies have confirmed the protective role of EA in suppressing oxidative stress. The review also discussed the mechanism of EA in suppressing of oxidative stress, which showed that EA activates specific endogenous antioxidant enzymes and suppresses specific genes responsible for inflammation, diseases, or disturbance of biochemical systems. The amount of EA used and duration, which plays a significant role in the treatment of oxidative stress has been discussed. In conclusion, EA is a strong natural antioxidant, which possesses the suppressing power of oxidative stress in biological systems.
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Affiliation(s)
- Alam Zeb
- Laboratory of Biochemistry, Department of Biotechnology, University of Malakand, Chakdara, Lower Dir, Khyber Pakhtunkhwa, Pakistan.
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52
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Zhang X, Liang D, Lian X, Jiang Y, He H, Liang W, Zhao Y, Chi ZH. Berberine activates Nrf2 nuclear translocation and inhibits apoptosis induced by high glucose in renal tubular epithelial cells through a phosphatidylinositol 3-kinase/Akt-dependent mechanism. Apoptosis 2018; 21:721-36. [PMID: 26979714 DOI: 10.1007/s10495-016-1234-5] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Apoptosis of tubular epithelial cells is a major feature of diabetic kidney disease, and hyperglycemia triggers the generation of free radicals and oxidant stress in tubular cells. Berberine (BBR) is identified as a potential anti-diabetic herbal medicine due to its beneficial effects on insulin sensitivity, glucose metabolism and glycolysis. In this study, the underlying mechanisms involved in the protective effects of BBR on high glucose-induced apoptosis were explored using cultured renal tubular epithelial cells (NRK-52E cells) and human kidney proximal tubular cell line (HK-2 cells). We identified the pivotal role of phosphatidylinositol 3-kinase (PI3K)/Akt in BBR cellular defense mechanisms and revealed the novel effect of BBR on nuclear factor (erythroid-derived 2)-related factor-2 (Nrf2) and heme oxygenase (HO)-1 in NRK-52E and HK-2 cells. BBR attenuated reactive oxygen species production, antioxidant defense (GSH and SOD) and oxidant-sensitive proteins (Nrf2 and HO-1), which also were blocked by LY294002 (an inhibitor of PI3K) in HG-treated NRK-52E and HK-2 cells. Furthermore, BBR improved mitochondrial function by increasing mitochondrial membrane potential. BBR-induced anti-apoptotic function was demonstrated by decreasing apoptotic proteins (cytochrome c, Bax, caspase3 and caspase9). All these findings suggest that BBR exerts the anti-apoptosis effects through activation of PI3K/Akt signal pathways and leads to activation of Nrf2 and induction of Nrf2 target genes, and consequently protecting the renal tubular epithelial cells from HG-induced apoptosis.
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Affiliation(s)
- Xiuli Zhang
- Department of Nephrology, Liaoning Province Benxi Center Hospital, 29 Victory Road, Benxi, 117000, Liaoning, People's Republic of China. .,Research Laboratory, Liaoning Province Benxi Center Hospital, Benxi, 117000, Liaoning, People's Republic of China. .,Key Laboratory of Medical Cell Biology, Ministry of Education, Shenyang, 110001, Liaoning, People's Republic of China.
| | - Dan Liang
- Troops of 95935 Unit, Haerbin, Heilongjiang, People's Republic of China
| | - Xu Lian
- Department of endocrinology, The Affiliated Hospital of Mudanjiang Medical University, Mudanjiang, 157000, Heilongjiang, People's Republic of China
| | - Yan Jiang
- Research Laboratory, Liaoning Province Benxi Center Hospital, Benxi, 117000, Liaoning, People's Republic of China
| | - Hui He
- Research Laboratory, Liaoning Province Benxi Center Hospital, Benxi, 117000, Liaoning, People's Republic of China
| | - Wei Liang
- Research Laboratory, Liaoning Province Benxi Center Hospital, Benxi, 117000, Liaoning, People's Republic of China
| | - Yue Zhao
- Key Laboratory of Medical Cell Biology, Ministry of Education, Shenyang, 110001, Liaoning, People's Republic of China
| | - Zhi-Hong Chi
- Department of Pathophysiology, China Medical University, Shenyang, 110001, Liaoning, People's Republic of China
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53
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Yüksel E, Nazıroğlu M, Şahin M, Çiğ B. Involvement of TRPM2 and TRPV1 channels on hyperalgesia, apoptosis and oxidative stress in rat fibromyalgia model: Protective role of selenium. Sci Rep 2017; 7:17543. [PMID: 29235496 PMCID: PMC5727501 DOI: 10.1038/s41598-017-17715-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 11/29/2017] [Indexed: 12/31/2022] Open
Abstract
Fibromyalgia (FM) results in pain characterized by low selenium (Se) levels, excessive Ca2+ influx, reactive oxygen species (ROS) production, and acidic pH. TRPM2 and TRPV1 are activated by ROS and acid; nevertheless, their roles have not been elucidated in FM. Therefore, we investigated the contribution of TRPM2 and TRPV1 to pain, oxidative stress, and apoptosis in a rat model of FM and the therapeutic potential of Se. Thirty-six rats were divided into four groups: control, Se, FM, and FM + Se. The Se treatment reduced the FM-induced increase in TRPM2 and TRPV1 currents, pain intensity, intracellular free Ca2+, ROS, and mitochondrial membrane depolarization in the sciatic (SciN) and dorsal root ganglion (DRGN) neurons. Furthermore, Se treatment attenuated the FM-induced decrease in cell viability in the DRGN and SciN, glutathione peroxidase, and reduced glutathione and α-tocopherol values in the DRGN, SciN, brain, muscle, and plasma; however, lipid peroxidation levels were decreased. Se also attenuated PARP1, caspase 3, and 9 expressions in the SciN, DRGN, and muscle. In conclusion, Se treatment decreased the FM-induced increase in hyperalgesia, ROS, apoptosis, and Ca2+ entry through TRPM2 and TRPV1 in the SciN and DRGN. Our findings may be relevant to the elucidation and treatment of FM.
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Affiliation(s)
- Esra Yüksel
- Division of Rheumatology, Department of Internal Medicine, Faculty of Medicine, Suleyman Demirel University, Isparta, Turkey
| | - Mustafa Nazıroğlu
- Neuroscience Research Center, Suleyman Demirel University, Isparta, Turkey.
- Department of Biophysics, Faculty of Medicine, Suleyman Demirel University, Isparta, Turkey.
- Department of Neuroscience, Institute of Health Sciences, Suleyman Demirel University, Isparta, Turkey.
| | - Mehmet Şahin
- Division of Rheumatology, Department of Internal Medicine, Faculty of Medicine, Suleyman Demirel University, Isparta, Turkey
| | - Bilal Çiğ
- Department of Biophysics, Faculty of Medicine, Suleyman Demirel University, Isparta, Turkey
- Department of Neuroscience, Institute of Health Sciences, Suleyman Demirel University, Isparta, Turkey
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54
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Pan L, Yang Z, Wang J, Wang P, Ma X, Zhou M, Li J, Gang N, Feng G, Zhao J, Zhang X. Comparative proteomic analyses reveal the proteome response to short-term drought in Italian ryegrass (Lolium multiflorum). PLoS One 2017; 12:e0184289. [PMID: 28910323 PMCID: PMC5598972 DOI: 10.1371/journal.pone.0184289] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Accepted: 08/20/2017] [Indexed: 11/25/2022] Open
Abstract
Drought is a major abiotic stress that impairs growth and productivity of Italian ryegrass. Comparative analysis of drought responsive proteins will provide insight into molecular mechanism in Lolium multiflorum drought tolerance. Using the iTRAQ-based approach, proteomic changes in tolerant and susceptible lines were examined in response to drought condition. A total of 950 differentially accumulated proteins was found to be involved in carbohydrate metabolism, amino acid metabolism, biosynthesis of secondary metabolites, and signal transduction pathway, such as β-D-xylosidase, β-D-glucan glucohydrolase, glycerate dehydrogenase, Cobalamin-independent methionine synthase, glutamine synthetase 1a, Farnesyl pyrophosphate synthase, diacylglycerol, and inositol 1, 4, 5-trisphosphate, which might contributed to enhance drought tolerance or adaption in Lolium multiflorum. Interestingly, the two specific metabolic pathways, arachidonic acid and inositol phosphate metabolism including differentially accumulated proteins, were observed only in the tolerant lines. Cysteine protease cathepsin B, Cysteine proteinase, lipid transfer protein and Aquaporin were observed as drought-regulated proteins participating in hydrolysis and transmembrane transport. The activities of phospholipid hydroperoxide glutathione peroxidase, peroxiredoxin, dehydroascorbate reductase, peroxisomal ascorbate peroxidase and monodehydroascorbate reductase associated with alleviating the accumulation of reactive oxygen species in stress inducing environments. Our results showed that drought-responsive proteins were closely related to metabolic processes including signal transduction, antioxidant defenses, hydrolysis, and transmembrane transport.
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Affiliation(s)
- Ling Pan
- Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - Zhongfu Yang
- Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - Jianping Wang
- Agronomy Department, University of Florida, Gainesville, FL, United States of America
| | - Pengxi Wang
- Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - Xiao Ma
- Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - Meiliang Zhou
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ji Li
- Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - Nie Gang
- Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - Guangyan Feng
- Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - Junming Zhao
- Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - Xinquan Zhang
- Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
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55
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Kong WL, Peng YY, Peng BW. Modulation of neuroinflammation: Role and therapeutic potential of TRPV1 in the neuro-immune axis. Brain Behav Immun 2017; 64:354-366. [PMID: 28342781 DOI: 10.1016/j.bbi.2017.03.007] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 03/04/2017] [Accepted: 03/14/2017] [Indexed: 02/07/2023] Open
Abstract
Transient receptor potential vanilloid type 1 channel (TRPV1), as a ligand-gated non-selective cation channel, has recently been demonstrated to have wide expression in the neuro-immune axis, where its multiple functions occur through regulation of both neuronal and non-neuronal activities. Growing evidence has suggested that TRPV1 is functionally expressed in glial cells, especially in the microglia and astrocytes. Glial cells perform immunological functions in response to pathophysiological challenges through pro-inflammatory or anti-inflammatory cytokines and chemokines in which TRPV1 is involved. Sustaining inflammation might mediate a positive feedback loop of neuroinflammation and exacerbate neurological disorders. Accumulating evidence has suggested that TRPV1 is closely related to immune responses and might be recognized as a molecular switch in the neuroinflammation of a majority of seizures and neurodegenerative diseases. In this review, we evidenced that inflammation modulates the expression and activity of TRPV1 in the central nervous system (CNS) and TRPV1 exerts reciprocal actions over neuroinflammatory processes. Together, the literature supports the hypothesis that TRPV1 may represent potential therapeutic targets in the neuro-immune axis.
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Affiliation(s)
- Wei-Lin Kong
- Department of Physiology, Hubei Provincial Key Laboratory of Developmentally Originated Disorder, Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei, China
| | - Yuan-Yuan Peng
- Department of Physiology, Hubei Provincial Key Laboratory of Developmentally Originated Disorder, Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei, China
| | - Bi-Wen Peng
- Department of Physiology, Hubei Provincial Key Laboratory of Developmentally Originated Disorder, Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei, China.
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56
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Ding R, Sun B, Liu Z, Yao X, Wang H, Shen X, Jiang H, Chen J. Advanced Oxidative Protein Products Cause Pain Hypersensitivity in Rats by Inducing Dorsal Root Ganglion Neurons Apoptosis via NADPH Oxidase 4/c-Jun N-terminal Kinase Pathways. Front Mol Neurosci 2017; 10:195. [PMID: 28674486 PMCID: PMC5474489 DOI: 10.3389/fnmol.2017.00195] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 06/02/2017] [Indexed: 02/02/2023] Open
Abstract
Pain hypersensitivity is the most common category of chronic pain and is difficult to cure. Oxidative stress and certain cells apoptosis, such as dorsal root ganglion (DRG) neurons, play an essential role in the induction and development of pain hypersensitivity. The focus of this study is at a more specific molecular level. We investigated the role of advanced oxidative protein products (AOPPs) in inducing hypersensitivity and the cellular mechanism underlying the proapoptotic effect of AOPPs. Normal rats were injected by AOPPs-Rat serum albumin (AOPPs–RSA) to cause pain hypersensitivity. Primary cultured DRG neurons were treated with increasing concentrations of AOPPs–RSA or for increasing time durations. The MTT, flow cytometry and western blot analyses were performed in the DRG neurons. A loss of mitochondrial membrane potential (MMP) and an increase in intracellular reactive oxygen species (ROS) were observed. We found that AOPPs triggered DRG neurons apoptosis and MMP loss. After AOPPs treatment, intracellular ROS generation increased in a time- and dose-dependent manner, whereas, N-acetyl-L-cysteine (NAC), a specific ROS scavenger could inhibit the ROS generation. Proapoptotic proteins, such as Bax, caspase 9/caspase 3, and PARP-1 were activated, whereas anti-apoptotic Bcl-2 protein was down-regulated. AOPPs also increased Nox4 and JNK expression. Taken together, these findings suggest that AOPPs cause pain hypersensitivity in rats, and extracellular AOPPs accumulation triggered Nox4-dependent ROS production, which activated JNK, and induced DRG neurons apoptosis by activating caspase 3 and PARP-1.
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Affiliation(s)
- Ruoting Ding
- Department of Spine Surgery, Nanfang Hospital, Southern Medical UniversityGuangzhou, China
| | - Baihui Sun
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital, Southern Medical UniversityGuangzhou, China
| | - Zhongyuan Liu
- Department of Spine Surgery, Nanfang Hospital, Southern Medical UniversityGuangzhou, China
| | - Xinqiang Yao
- Department of Spine Surgery, Nanfang Hospital, Southern Medical UniversityGuangzhou, China
| | - Haiming Wang
- Department of Spine Surgery, Nanfang Hospital, Southern Medical UniversityGuangzhou, China
| | - Xing Shen
- Department of Spine Surgery, Nanfang Hospital, Southern Medical UniversityGuangzhou, China
| | - Hui Jiang
- Department of Spine Surgery, Nanfang Hospital, Southern Medical UniversityGuangzhou, China
| | - Jianting Chen
- Department of Spine Surgery, Nanfang Hospital, Southern Medical UniversityGuangzhou, China
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57
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Uslusoy F, Nazıroğlu M, Çiğ B. Inhibition of the TRPM2 and TRPV1 Channels through Hypericum perforatum in Sciatic Nerve Injury-induced Rats Demonstrates their Key Role in Apoptosis and Mitochondrial Oxidative Stress of Sciatic Nerve and Dorsal Root Ganglion. Front Physiol 2017; 8:335. [PMID: 28620309 PMCID: PMC5449501 DOI: 10.3389/fphys.2017.00335] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 05/08/2017] [Indexed: 11/13/2022] Open
Abstract
Sciatic nerve injury (SNI) results in neuropathic pain, which is characterized by the excessive Ca2+ entry, reactive oxygen species (ROS) and apoptosis processes although involvement of antioxidant Hypericum perforatum (HP) through TRPM2 and TRPV1 activation has not been clarified on the processes in SNI-induced rat, yet. We investigated the protective property of HP on the processes in the sciatic nerve and dorsal root ganglion neuron (DRGN) of SNI-induced rats. The rats were divided into five groups as control, sham, sham+HP, SNI, and SNI+HP. The HP groups received 30 mg/kg HP for 4 weeks after SNI induction. TRPM2 and TRPV1 channels were activated in the neurons by ADP-ribose or cumene peroxide and capsaicin, respectively. The SNI-induced TRPM2 and TRPV1 currents and intracellular free Ca2+ and ROS concentrations were reduced by HP, N-(p-amylcinnamoyl) anthranilic acid (ACA), and capsazepine (CapZ). SNI-induced increase in apoptosis and mitochondrial depolarization in sciatic nerve and DRGN of SNI group were decreased by HP, ACA, and CapZ treatments. PARP-1, caspase 3 and 9 expressions in the sciatic nerve, DRGN, skin, and musculus piriformis of SNI group were also attenuated by HP treatment. In conclusion, increase of mitochondrial ROS, apoptosis, and Ca2+ entry through inhibition of TRPM2 and TRPV1 in the sciatic nerve and DRGN neurons were decreased by HP treatment. The results may be relevant to the etiology and treatment of SNI by HP.
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Affiliation(s)
- Fuat Uslusoy
- Department of Plastic Reconstructive and Aesthetic Surgery, Faculty of Medicine, Suleyman Demirel UniversityIsparta, Turkey
| | - Mustafa Nazıroğlu
- Neuroscience Research Center, Suleyman Demirel UniversityIsparta, Turkey.,Department of Biophysics, Faculty of Medicine, Suleyman Demirel UniversityIsparta, Turkey.,Department of Neuroscience, Institute of Health Sciences, Suleyman Demirel UniversityIsparta, Turkey
| | - Bilal Çiğ
- Department of Biophysics, Faculty of Medicine, Suleyman Demirel UniversityIsparta, Turkey.,Department of Neuroscience, Institute of Health Sciences, Suleyman Demirel UniversityIsparta, Turkey
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58
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Wong-Guerra M, Jiménez-Martin J, Pardo-Andreu GL, Fonseca-Fonseca LA, Souza DO, de Assis AM, Ramirez-Sanchez J, Del Valle RMS, Nuñez-Figueredo Y. Mitochondrial involvement in memory impairment induced by scopolamine in rats. Neurol Res 2017; 39:649-659. [PMID: 28398193 DOI: 10.1080/01616412.2017.1312775] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
OBJECTIVE Scopolamine (SCO) administration to rats induces molecular features of AD and other dementias, including impaired cognition, increased oxidative stress, and imbalanced cholinergic transmission. Although mitochondrial dysfunction is involved in different types of dementias, its role in cognitive impairment induced by SCO has not been well elucidated. The aim of this work was to evaluate the in vivo effect of SCO on different brain mitochondrial parameters in rats to explore its neurotoxic mechanisms of action. METHODS Saline (Control) or SCO (1 mg/kg) was administered intraperitoneally 30 min prior to neurobehavioral and biochemical evaluations. Novel object recognition and Y-maze paradigms were used to evaluate the impact on memory, while redox profiles in different brain regions and the acetylcholinesterase (AChE) activity of the whole brain were assessed to elucidate the amnesic mechanism of SCO. Finally, the effects of SCO on brain mitochondria were evaluated both ex vivo and in vitro, the latter to determine whether SCO could directly interfere with mitochondrial function. RESULTS SCO administration induced memory deficit, increased oxidative stress, and increased AChE activities in the hippocampus and prefrontal cortex. Isolated brain mitochondria from rats administered with SCO were more vulnerable to mitochondrial swelling, membrane potential dissipation, H2O2 generation and calcium efflux, all likely resulting from oxidative damage. The in vitro mitochondrial assays suggest that SCO did not affect the organelle function directly. CONCLUSION In conclusion, the present results indicate that SCO induced cognitive dysfunction and oxidative stress may involve brain mitochondrial impairment, an important target for new neuroprotective compounds against AD and other dementias.
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Affiliation(s)
- Maylin Wong-Guerra
- a Laboratorio de Neuroprotección , Centro de Investigación y Desarrollo de Medicamentos , La Habana , Cuba
| | | | - Gilberto L Pardo-Andreu
- c Centro de Estudio para las Investigaciones y Evaluaciones Biológicas, Instituto de Farmacia y Alimentos , Universidad de La Habana , La Habana , Cuba
| | - Luis A Fonseca-Fonseca
- a Laboratorio de Neuroprotección , Centro de Investigación y Desarrollo de Medicamentos , La Habana , Cuba
| | - Diogo O Souza
- d Departamento de Bioquímica, PPG em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde , Universidade Federal do Rio Grande do Sul , Porto Alegre , Brazil
| | - Adriano M de Assis
- d Departamento de Bioquímica, PPG em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde , Universidade Federal do Rio Grande do Sul , Porto Alegre , Brazil
| | - Jeney Ramirez-Sanchez
- a Laboratorio de Neuroprotección , Centro de Investigación y Desarrollo de Medicamentos , La Habana , Cuba
| | | | - Yanier Nuñez-Figueredo
- a Laboratorio de Neuroprotección , Centro de Investigación y Desarrollo de Medicamentos , La Habana , Cuba
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59
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Ben-Kasus Nissim T, Zhang X, Elazar A, Roy S, Stolwijk JA, Zhou Y, Motiani RK, Gueguinou M, Hempel N, Hershfinkel M, Gill DL, Trebak M, Sekler I. Mitochondria control store-operated Ca 2+ entry through Na + and redox signals. EMBO J 2017; 36:797-815. [PMID: 28219928 DOI: 10.15252/embj.201592481] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 12/25/2016] [Accepted: 01/05/2017] [Indexed: 02/05/2023] Open
Abstract
Mitochondria exert important control over plasma membrane (PM) Orai1 channels mediating store-operated Ca2+ entry (SOCE). Although the sensing of endoplasmic reticulum (ER) Ca2+ stores by STIM proteins and coupling to Orai1 channels is well understood, how mitochondria communicate with Orai1 channels to regulate SOCE activation remains elusive. Here, we reveal that SOCE is accompanied by a rise in cytosolic Na+ that is critical in activating the mitochondrial Na+/Ca2+ exchanger (NCLX) causing enhanced mitochondrial Na+ uptake and Ca2+ efflux. Omission of extracellular Na+ prevents the cytosolic Na+ rise, inhibits NCLX activity, and impairs SOCE and Orai1 channel current. We show further that SOCE activates a mitochondrial redox transient which is dependent on NCLX and is required for preventing Orai1 inactivation through oxidation of a critical cysteine (Cys195) in the third transmembrane helix of Orai1. We show that mitochondrial targeting of catalase is sufficient to rescue redox transients, SOCE, and Orai1 currents in NCLX-deficient cells. Our findings identify a hitherto unknown NCLX-mediated pathway that coordinates Na+ and Ca2+ signals to effect mitochondrial redox control over SOCE.
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Affiliation(s)
- Tsipi Ben-Kasus Nissim
- The Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Xuexin Zhang
- Department of Cellular and Molecular Physiology, The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Assaf Elazar
- The Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Soumitra Roy
- The Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Judith A Stolwijk
- Department of Cellular and Molecular Physiology, The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Yandong Zhou
- Department of Cellular and Molecular Physiology, The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Rajender K Motiani
- Department of Cellular and Molecular Physiology, The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Maxime Gueguinou
- Department of Cellular and Molecular Physiology, The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Nadine Hempel
- Department of Pharmacology, The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Michal Hershfinkel
- The Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Donald L Gill
- Department of Cellular and Molecular Physiology, The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Mohamed Trebak
- Department of Cellular and Molecular Physiology, The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Israel Sekler
- The Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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60
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Xiang LR, Li W, Wang LL, Cao CY, Li N, Li XN, Jiang XQ, Li JL. The supranutritional selenium status alters blood glucose and pancreatic redox homeostasis via a modulated selenotranscriptome in chickens (Gallus gallus). RSC Adv 2017. [DOI: 10.1039/c7ra02278f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Dietary Se status stabilizes pancreatic normal physiology functionviathe regulation of the selenoprotemic transcriptions. Supranutritional or excess Se status alters the pancreatic redox homeostasisviamodulated selenotranscriptome.
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Affiliation(s)
- Li-Run Xiang
- College of Veterinary Medicine
- Northeast Agricultural University
- Harbin
- People's Republic of China
| | - Wei Li
- College of Veterinary Medicine
- Northeast Agricultural University
- Harbin
- People's Republic of China
| | - Li-Li Wang
- College of Veterinary Medicine
- Northeast Agricultural University
- Harbin
- People's Republic of China
- College of Veterinary Medicine
| | - Chang-Yu Cao
- College of Veterinary Medicine
- Northeast Agricultural University
- Harbin
- People's Republic of China
| | - Nan Li
- College of Veterinary Medicine
- Northeast Agricultural University
- Harbin
- People's Republic of China
- National Science and Technology
| | - Xue-Nan Li
- College of Veterinary Medicine
- Northeast Agricultural University
- Harbin
- People's Republic of China
- Key Laboratory of the Provincial Education
| | - Xiu-Qing Jiang
- College of Veterinary Medicine
- Northeast Agricultural University
- Harbin
- People's Republic of China
- Key Laboratory of the Provincial Education
| | - Jin-Long Li
- College of Veterinary Medicine
- Northeast Agricultural University
- Harbin
- People's Republic of China
- Key Laboratory of the Provincial Education
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61
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Schepetkin IA, Kushnarenko SV, Özek G, Kirpotina LN, Sinharoy P, Utegenova GA, Abidkulova KT, Özek T, Başer KHC, Kovrizhina AR, Khlebnikov AI, Damron DS, Quinn MT. Modulation of Human Neutrophil Responses by the Essential Oils from Ferula akitschkensis and Their Constituents. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:7156-70. [PMID: 27586050 PMCID: PMC5048753 DOI: 10.1021/acs.jafc.6b03205] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Essential oils were obtained by hydrodistillation of the umbels+seeds and stems of Ferula akitschkensis (FAEOu/s and FAEOstm, respectively) and analyzed by gas chromatography and gas chromatography-mass spectrometry. Fifty-two compounds were identified in FAEOu/s; the primary components were sabinene, α-pinene, β-pinene, terpinen-4-ol, eremophilene, and 2-himachalen-7-ol, whereas the primary components of FAEOstm were myristicin and geranylacetone. FAEOu/s, β-pinene, sabinene, γ-terpinene, geranylacetone, isobornyl acetate, and (E)-2-nonenal stimulated [Ca(2+)]i mobilization in human neutrophils, with the most potent being geranylacetone (EC50 = 7.6 ± 1.9 μM) and isobornyl acetate 6.4 ± 1.7 (EC50 = 7.6 ± 1.9 μM). In addition, treatment of neutrophils with β-pinene, sabinene, γ-terpinene, geranylacetone, and isobornyl acetate desensitized the cells to N-formyl-Met-Leu-Phe (fMLF)- and interleukin-8 (IL-8)-induced [Ca(2+)]i flux and inhibited fMLF-induced chemotaxis. The effects of β-pinene, sabinene, γ-terpinene, geranylacetone, and isobornyl acetate on neutrophil [Ca(2+)]i flux were inhibited by transient receptor potential (TRP) channel blockers. Furthermore, the most potent compound, geranylacetone, activated Ca(2+) influx in TRPV1-transfected HEK293 cells. In contrast, myristicin inhibited neutrophil [Ca(2+)]i flux stimulated by fMLF and IL-8 and inhibited capsaicin-induced Ca(2+) influx in TRPV1-transfected HEK293 cells. These findings, as well as pharmacophore modeling of TRP agonists, suggest that geranylacetone is a TRPV1 agonist, whereas myristicin is a TRPV1 antagonist. Thus, at least part of the medicinal properties of Ferula essential oils may be due to modulatory effects on TRP channels.
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Affiliation(s)
- Igor A Schepetkin
- Department of Microbiology and Immunology, Montana State University , Bozeman, Montana 59717, United States
| | | | - Gulmira Özek
- Department of Pharmacognosy, Faculty of Pharmacy, Anadolu University , Eskisehir 26470, Turkey
| | - Liliya N Kirpotina
- Department of Microbiology and Immunology, Montana State University , Bozeman, Montana 59717, United States
| | - Pritam Sinharoy
- Department of Biological Sciences, Kent State University , Kent, Ohio 44242, United States
| | - Gulzhakhan A Utegenova
- Institute of Plant Biology and Biotechnology , Almaty 050040, Republic of Kazakhstan
- Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University , Almaty 050040, Republic of Kazakhstan
| | - Karime T Abidkulova
- Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University , Almaty 050040, Republic of Kazakhstan
| | - Temel Özek
- Department of Pharmacognosy, Faculty of Pharmacy, Anadolu University , Eskisehir 26470, Turkey
| | - Kemal Hüsnü Can Başer
- Department of Pharmacognosy, Faculty of Pharmacy, Near East University , Nicosia, North Cyprus
| | - Anastasia R Kovrizhina
- Department of Biotechnology and Organic Chemistry, Tomsk Polytechnic University , Tomsk 634050, Russia
| | - Andrei I Khlebnikov
- Department of Biotechnology and Organic Chemistry, Tomsk Polytechnic University , Tomsk 634050, Russia
- Department of Chemistry, Altai State Technical University , Barnaul 656038, Russia
| | - Derek S Damron
- Department of Biological Sciences, Kent State University , Kent, Ohio 44242, United States
| | - Mark T Quinn
- Department of Microbiology and Immunology, Montana State University , Bozeman, Montana 59717, United States
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Ershova OA, Bairova TA, Kolesnikov SI, Kalyuzhnaya OV, Darenskaya MA, Kolesnikova LI. Oxidative Stress and Catalase Gene. Bull Exp Biol Med 2016; 161:400-3. [PMID: 27496033 DOI: 10.1007/s10517-016-3424-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Indexed: 11/30/2022]
Abstract
We studied the frequency of alleles and genotypes of CAT gene -262C>T polymorphism (rs1001179) in Russian and Buryat adolescents. The frequency of -262T allele was 28.31% in Russians and 16.84% in Buryats (p<0.01). In both ethnic groups, a correlation between the study polymorphism and concentration of diene conjugates was observed. Carriers of TT-genotype of CAT gene-262C>T polymorphism had lower level of diene conjugates than carriers of CT- and CC-genotypes.
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Affiliation(s)
- O A Ershova
- Research Center of Family Health and Human Reproduction Problems, Irkutsk, Russia.
| | - T A Bairova
- Research Center of Family Health and Human Reproduction Problems, Irkutsk, Russia
| | - S I Kolesnikov
- Research Center of Family Health and Human Reproduction Problems, Irkutsk, Russia
| | - O V Kalyuzhnaya
- Research Center of Family Health and Human Reproduction Problems, Irkutsk, Russia
| | - M A Darenskaya
- Research Center of Family Health and Human Reproduction Problems, Irkutsk, Russia
| | - L I Kolesnikova
- Research Center of Family Health and Human Reproduction Problems, Irkutsk, Russia
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Abstract
Epilepsy has 2-3% incidence worldwide. However, present antiepileptic drugs provide only partial control of seizures. Calcium ion accumulation in hippocampal neurons has long been known as a major contributor to the etiology of epilepsy. TRPV1 is a calcium-permeable channel and mediator of epilepsy in the hippocampus. TRPV1 is expressed in epileptic brain areas such as CA1 area and dentate gyrus of the hippocampus. Here the author reviews the patent literature on novel molecules targeting TRPV1 that are currently being investigated in the laboratory and are candidates for future clinical evaluation in the management of epilepsy. A limited number of recent reports have implicated TRPV1 in the induction or treatment of epilepsy suggesting that this may be new area for potential drugs targeting this debilitating disease. Thus activation of TRPV1 by oxidative stress, resiniferatoxin, cannabinoid receptor (CB1) activators (i.e. anandamide) or capsaicin induced epileptic effects, and these effects could be reduced by appropriate inhibitors, including capsazepine (CPZ), 5'-iodoresiniferatoxin (IRTX), resolvins, and CB1 antagonists. It has been also reported that CPZ and IRTX reduced spontaneous excitatory synaptic transmission through modulation of glutaminergic systems and desensitization of TRPV1 channels in the hippocampus of rats. Immunocytochemical studies indicated that TRPV1 channel expression increased in the hippocampus of mice and patients with temporal lobe epilepsy. Taken together, findings in the current literature support a role for calcium ion accumulation through TRPV1 channels in the etiology of epileptic seizures, indicating that inhibition of TRPV1 in the hippocampus may possibly be a novel target for prevention of epileptic seizures.
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Affiliation(s)
- Mustafa Nazıroğlu
- Director of Neuroscience Research Center, Suleyman Demirel University, TR-32260, Isparta, Turkey.
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Abstract
Psychiatric and neurological disorders are mostly associated with the changes in neural calcium ion signaling pathways required for activity-triggered cellular events. One calcium channel family is the TRP cation channel family, which contains seven subfamilies. Results of recent papers have discovered that calcium ion influx through TRP channels is important. We discuss the latest advances in calcium ion influx through TRP channels in the etiology of psychiatric disorders. Activation of TRPC4, TRPC5, and TRPV1 cation channels in the etiology of psychiatric disorders such as anxiety, fear-associated responses, and depression modulate calcium ion influx. Evidence substantiates that anandamide and its analog (methanandamide) induce an anxiolytic-like effect via CB1 receptors and TRPV1 channels. Intracellular calcium influx induced by oxidative stress has an significant role in the etiology of bipolar disorders (BDs), and studies recently reported the important role of TRP channels such as TRPC3, TRPM2, and TRPV1 in converting oxidant or nitrogen radical signaling to cytosolic calcium ion homeostasis in BDs. The TRPV1 channel also plays a function in morphine tolerance and hyperalgesia. Among psychotropic drugs, amitriptyline and capsazepine seem to have protective effects on psychiatric disorders via the TRP channels. Some drugs such as cocaine and methamphetamine also seem to have an important role in alcohol addiction and substance abuse via activation of the TRPV1 channel. Thus, we explore the relationships between the etiology of psychiatric disorders and TRP channel-regulated mechanisms. Investigation of the TRP channels in psychiatric disorders holds the promise of the development of new drug treatments.
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Affiliation(s)
- Mustafa Nazıroğlu
- Neuroscience Research Center, Süleyman Demirel University, Dekanlık Binası, TR-32260, Isparta, Turkey.
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Cao C, Zhao X, Fan R, Zhao J, Luan Y, Zhang Z, Xu S. Dietary selenium increases the antioxidant levels and ATPase activity in the arteries and veins of poultry. Biol Trace Elem Res 2016; 172:222-227. [PMID: 26637493 DOI: 10.1007/s12011-015-0584-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Accepted: 11/30/2015] [Indexed: 12/25/2022]
Abstract
Selenium (Se) deficiency is associated with the pathogenesis of vascular diseases. It has been shown that oxidative levels and ATPase activity were involved in Se deficiency diseases in humans and mammals; however, the mechanism by how Se influences the oxidative levels and ATPase activity in the poultry vasculature is unclear. We assessed the effects of dietary Se deficiency on the oxidative stress parameters (superoxide dismutase, catalase, and hydroxyl radical) and ATPase (Na(+)K(+)-ATPase, Ca(++)-ATPase, Mg(++)-ATPase, and Ca(++)Mg(++)-ATPase) activity in broiler poultry. A total of 40 broilers (1-day old) were randomly divided into a Se-deficient group (L group, fed a Se-deficient diet containing 0.08 mg/kg Se) and a control group (C group, fed a diet containing sodium selenite at 0.20 mg/kg Se). Then, arteries and veins were collected following euthanasia when typical symptoms of Se deficiency appeared. Antioxidant indexes and ATPase activity were evaluated using standard assays in arteries and veins. The results indicated that superoxide dismutase activity in the artery according to dietary Se deficiency was significantly lower (p < 0.05) compared with the C group. The catalase activity in the veins and hydroxyl radical inhibition in the arteries and veins by dietary Se deficiency were significantly higher (p < 0.05) compared with the C group. The Se-deficient group showed a significantly lower (p < 0.05) tendency in Na(+)K(+)-ATPase activity, Ca(++)-ATPase activity, and Ca(++)Mg(++)-ATPase activity. There were strong correlations between antioxidant indexes and Ca(++)-ATPase activity. Thus, these results indicate that antioxidant indexes and ATPases may have special roles in broiler artery and vein injuries under Se deficiency.
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Affiliation(s)
- Changyu Cao
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Xia Zhao
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Ruifeng Fan
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Jinxin Zhao
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Yilin Luan
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Ziwei Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
| | - Shiwen Xu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
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Abdoul-Azize S, Buquet C, Vannier JP, Dubus I. Pyr3, a TRPC3 channel blocker, potentiates dexamethasone sensitivity and apoptosis in acute lymphoblastic leukemia cells by disturbing Ca(2+) signaling, mitochondrial membrane potential changes and reactive oxygen species production. Eur J Pharmacol 2016; 784:90-8. [PMID: 27179991 DOI: 10.1016/j.ejphar.2016.05.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 05/09/2016] [Accepted: 05/10/2016] [Indexed: 01/02/2023]
Abstract
Dexamethasone (Dex) is used as a chemotherapeutic drug in the treatment of acute lymphoblastic leukemia (ALL) because of its capacity to induce apoptosis. However, some ALL patients acquire resistance to glucocorticoids (GC). Thus, it is important to explore new agents to overcome GC resistance. The aim of the present work was to assess the ability of Pyr3, a selective inhibitor of transient receptor potential canonical 3 (TRPC3), to sensitize human ALL cells to Dex. We show here, for the first time, that Pyr3 enhances Dex sensitivity through the distraction of Dex-mediated Ca(2+) signaling in ALL cells (in vitro) and primary blasts (ex vivo) associated with mitochondrial-mediated reactive oxygen species production in ALL cells. Pyr3 alone induced Ca(2+) signaling via only endoplasmic reticulum-released Ca(2+) and exerted inhibitory effect on store-operated Ca(2+) entry in dose-dependent manner in ALL cell lines. Pre-incubation of cells with Pyr3 significantly curtailed the thapsigargin- and Dex-evoked Ca(2+) signaling in ALL cell lines. Pyr3 synergistically potentiated Dex lethality, as shown by the induction of cell mortality, G2/M cell cycle arrest and apoptosis in ALL cell lines. Moreover, Pyr3 disrupted Dex-mediated Ca(2+) signaling and increased the sensitivity of Dex-induced cell death in primary blasts from ALL patients. Additional analysis showed that co-treatment with Dex and Pyr3 results in mitochondrial membrane potential depolarization and reactive oxygen species production in ALL cells. Together, Pyr3 exhibited potential therapeutic benefit in combination with Dex to inverse glucocorticoid resistance in human ALL and probably in other lymphoid malignancies.
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Affiliation(s)
- Souleymane Abdoul-Azize
- Groupe de Recherche "Micro-Environnement et Renouvellement Cellulaire Intégré" MERCI UPRES EA 3829, Faculté de Médecine et Pharmacie, Université de Rouen, 76183 Rouen Cedex, France.
| | - Catherine Buquet
- Groupe de Recherche "Micro-Environnement et Renouvellement Cellulaire Intégré" MERCI UPRES EA 3829, Faculté de Médecine et Pharmacie, Université de Rouen, 76183 Rouen Cedex, France
| | - Jean-Pierre Vannier
- Groupe de Recherche "Micro-Environnement et Renouvellement Cellulaire Intégré" MERCI UPRES EA 3829, Faculté de Médecine et Pharmacie, Université de Rouen, 76183 Rouen Cedex, France; Service Immuno-Hémato-Oncologie Pédiatrique, CHU Charles Nicolle, 76031 Rouen Cedex, France
| | - Isabelle Dubus
- Groupe de Recherche "Micro-Environnement et Renouvellement Cellulaire Intégré" MERCI UPRES EA 3829, Faculté de Médecine et Pharmacie, Université de Rouen, 76183 Rouen Cedex, France
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Nishino K, Tanamachi K, Nakanishi Y, Ide S, Kojima S, Tanuma SI, Tsukimoto M. Radiosensitizing Effect of TRPV1 Channel Inhibitors in Cancer Cells. Biol Pharm Bull 2016; 39:1224-30. [PMID: 27150432 DOI: 10.1248/bpb.b16-00080] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Radiosensitizers are used in cancer therapy to increase the γ-irradiation susceptibility of cancer cells, including radioresistant hypoxic cancer cells within solid tumors, so that radiotherapy can be applied at doses sufficiently low to minimize damage to adjacent normal tissues. Radiation-induced DNA damage is repaired by multiple repair systems, and therefore these systems are potential targets for radiosensitizers. We recently reported that the transient receptor potential vanilloid type 1 (TRPV1) channel is involved in early responses to DNA damage after γ-irradiation of human lung adenocarcinoma A549 cells. Therefore, we hypothesized that TRPV1 channel inhibitors would have a radiosensitizing effect by blocking repair of radiation-induced cell damage. Here, we show that pretreatment of A549 cells with the TRPV1 channel inhibitors capsazepine, AMG9810, SB366791 and BCTC suppressed the γ-ray-induced activation of early DNA damage responses, i.e., activation of the protein kinase ataxia-telangiectasia mutated (ATM) and accumulation of p53-binding protein 1 (53BP1). Further, the decrease of survival fraction at one week after γ-irradiation (2.0 Gy) was enhanced by pretreatment of cells with these inhibitors. On the other hand, inhibitor pretreatment did not affect cell viability, the number of apoptotic or necrotic cells, or DNA synthesis at 24 h after irradiation. These results suggest that inhibition of DNA repair by TRPV1 channel inhibitors in irradiated A549 cells caused gradual loss of proliferative ability, rather than acute facilitation of apoptosis or necrosis. TRPV1 channel inhibitors could be novel candidates for radiosensitizers to improve the efficacy of radiation therapy, either alone or in combination with other types of radiosensitizers.
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Affiliation(s)
- Keisuke Nishino
- Department of Radiation Biosciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science
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68
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Tsukimoto M. Purinergic Signaling Is a Novel Mechanism of the Cellular Response to Ionizing Radiation. Biol Pharm Bull 2016; 38:951-9. [PMID: 26133701 DOI: 10.1248/bpb.b15-00062] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Recent studies suggest the effect of radiation is observed not only in irradiated cells but also in adjacent non-irradiated cells (bystander effect), although the mechanism has not yet been fully revealed. This bystander effect may be caused by intercellular communication via a gap junction or by messengers released from irradiated cells, such as reactive oxygen species, nitric oxide, or cytokines. However, an unknown mechanism is also possible in the bystander effect. On the other hand, it is known that extracellular ATP, ADP, uridine 5'-triphosphate (UTP), and uridine 5'-diphosphate (UDP), which are released from cells, act as intercellular signaling molecules by activating purinergic P2X and P2Y receptors (purinergic signaling). Recently, I have suggested these extracellular nucleotides may be novel mediators of a radiation-induced bystander effect, because our recent studies indicated that purinergic signaling is involved in important cellular responses to radiation. Our data indicate that ionizing irradiation causes activation of the transient receptor potential melastatin type 2 (TRPM2) channel, and then ATP is released from cells through the anion channel or connexin43 hemichannel mediated by the activation of a P2X7 receptor. The released nucleotides activate P2Y6 and P2Y12 receptors, which are involved in the DNA damage response after irradiation. Activation of the P2Y6 receptor is also involved in radiation-induced activation of the epithelial growth factor receptor-extracellular signal regulated protein kinase (EGFR-ERK)1/2 pathway and subsequent nuclear translocation of EGFR, which plays a role in DNA repair. Further, the induction of an antioxidant after irradiation is also mediated by the activation of the P2Y receptor. In conclusion, purinergic signaling could play an important role in the protective cellular response to ionizing irradiation.
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Affiliation(s)
- Mitsutoshi Tsukimoto
- Department of Radiation Biosciences, Faculty of Pharmaceutical Sciences, Tokyo University of Science
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Glia and TRPM2 Channels in Plasticity of Central Nervous System and Alzheimer's Diseases. Neural Plast 2016; 2016:1680905. [PMID: 26942016 PMCID: PMC4749827 DOI: 10.1155/2016/1680905] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2015] [Revised: 12/25/2015] [Accepted: 12/29/2015] [Indexed: 11/18/2022] Open
Abstract
Synaptic plasticity refers to the ability of neurons to strengthen or weaken synaptic efficacy in response to activity and is the basis for learning and memory. Glial cells communicate with neurons and in this way contribute in part to plasticity in the CNS and to the pathology of Alzheimer's disease (AD), a neurodegenerative disease in which impaired synaptic plasticity is causally implicated. The transient receptor potential melastatin member 2 (TRPM2) channel is a nonselective Ca2+-permeable channel expressed in both glial cells (microglia and astrocytes) and neurons. Recent studies indicated that TRPM2 regulates synaptic plasticity as well as the activation of glial cells. TRPM2 also modulates oxidative stress and inflammation through interaction with glial cells. As both oxidative stress and inflammation have been implicated in AD pathology, this suggests a possible contribution of TRPM2 to disease processes. Through modulating the homeostasis of glutathione, TRPM2 is involved in the process of aging which is a risk factor of AD. These results potentially point TRPM2 channel to be involved in AD through glial cells. This review summarizes recent advances in studying the contribution of TRPM2 in health and in AD pathology, with a focus on contributions via glia cells.
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Ge W, Yuan M, Ceylan AF, Wang X, Ren J. Mitochondrial aldehyde dehydrogenase protects against doxorubicin cardiotoxicity through a transient receptor potential channel vanilloid 1-mediated mechanism. Biochim Biophys Acta Mol Basis Dis 2015; 1862:622-634. [PMID: 26692169 DOI: 10.1016/j.bbadis.2015.12.014] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Revised: 11/25/2015] [Accepted: 12/11/2015] [Indexed: 12/25/2022]
Abstract
Cardiotoxicity is one of the major life-threatening effects encountered in cancer chemotherapy with doxorubicin and other anthracyclines. Mitochondrial aldehyde dehydrogenase (ALDH2) may alleviate doxorubicin toxicity although the mechanism remains elusive. This study was designed to evaluate the impact of ALDH2 overexpression on doxorubicin-induced myocardial damage with a focus on mitochondrial injury. Wild-type (WT) and transgenic mice overexpressing ALDH2 driven by chicken β-actin promoter were challenged with doxorubicin (15mg/kg, single i.p. injection, for 6days) and cardiac mechanical function was assessed using the echocardiographic and IonOptix systems. Western blot analysis was used to evaluate intracellular Ca(2+) regulatory and mitochondrial proteins, PKA and its downstream signal eNOS. Doxorubicin challenge altered cardiac geometry and function evidenced by enlarged left ventricular end systolic and diastolic diameters, decreased factional shortening, cell shortening and intracellular Ca(2+) rise, prolonged relengthening and intracellular Ca(2+) decay, the effects of which were attenuated by ALDH2. Doxorubicin challenge compromised mitochondrial integrity and upregulated 4-HNE and UCP-2 levels while downregulating levels of TRPV1, SERCA2a and PGC-1α, the effects of which were alleviated by ALDH2. Doxorubicin-induced cardiac functional defect and apoptosis were reversed by the TRPV1 agonist SA13353 and the ALDH-2 agonist Alda-1 whereas the TRPV1 antagonist capsazepine nullified ALDH2/Alda-1-induced protection. Doxorubicin suppressed phosphorylation of PKA and eNOS, the effect of which was reversed by ALDH2. Moreover, 4-HNE mimicked doxorubicin-induced cardiomyocyte anomalies, the effect of which was ablated by SA13353. Taken together, our results suggested that ALDH2 may rescue against doxorubicin cardiac toxicity possibly through a TRPV1-mediated protection of mitochondrial integrity.
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Affiliation(s)
- Wei Ge
- Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China; Center for Cardiovascular Research and Alternative Medicine, University of Wyoming College of Health Sciences, Laramie, WY 82071, USA
| | - Ming Yuan
- Department of Cardiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Asli F Ceylan
- Center for Cardiovascular Research and Alternative Medicine, University of Wyoming College of Health Sciences, Laramie, WY 82071, USA
| | - Xiaoming Wang
- Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China.
| | - Jun Ren
- Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China; Center for Cardiovascular Research and Alternative Medicine, University of Wyoming College of Health Sciences, Laramie, WY 82071, USA; Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai 200032, China.
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71
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Uğuz AC, Öz A, Nazıroğlu M. Curcumin inhibits apoptosis by regulating intracellular calcium release, reactive oxygen species and mitochondrial depolarization levels in SH-SY5Y neuronal cells. J Recept Signal Transduct Res 2015; 36:395-401. [PMID: 26608462 DOI: 10.3109/10799893.2015.1108337] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Neurological diseases such as Alzheimer's and Parkinson's diseases are incurable progressive neurological disorders caused by the degeneration of neuronal cells and characterized by motor and non-motor symptoms. Curcumin, a turmeric product, is an anti-inflammatory agent and an effective reactive oxygen and nitrogen species scavenging molecule. Hydrogen peroxide (H2O2) is the main source of oxidative stress, which is claimed to be the major source of neurological disorders. Hence, in this study we aimed to investigate the effect of curcumin on Ca(2+) signaling, oxidative stress parameters, mitochondrial depolarization levels and caspase-3 and -9 activities that are induced by the H2O2 model of oxidative stress in SH-SY5Y neuronal cells. SH-SY5Y neuronal cells were divided into four groups namely, the control, curcumin, H2O2, and curcumin + H2O2 groups. The dose and duration of curcumin and H2O2 were determined from published data. The cells in the curcumin, H2O2, and curcumin + H2O2 groups were incubated for 24 h with 5 µM curcumin and 100 µM H2O2. Lipid peroxidation and cytosolic free Ca(2+) concentrations were higher in the H2O2 group than in the control group; however, their levels were lower in the curcumin and curcumin + H2O2 groups than in the H2O2 group alone. Reduced glutathione (GSH) and glutathione peroxidase (GSH-Px) values were lower in the H2O2 group although they were higher in the curcumin and curcumin + H2O2 groups than in the H2O2 group. Caspase-3 activity was lower in the curcumin group than in the H2O2 group. In conclusion, curcumin strongly induced modulator effects on oxidative stress, intracellular Ca(2+) levels, and the caspase-3 and -9 values in an experimental oxidative stress model in SH-SY5Y cells.
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Affiliation(s)
- Abdülhadi Cihangir Uğuz
- a Department of Biophysics , School of Medicine, Süleyman Demirel University , Isparta , Turkey and.,b Neuroscience Research Center, Süleyman Demirel University , Isparta , Turkey
| | - Ahmi Öz
- a Department of Biophysics , School of Medicine, Süleyman Demirel University , Isparta , Turkey and
| | - Mustafa Nazıroğlu
- a Department of Biophysics , School of Medicine, Süleyman Demirel University , Isparta , Turkey and.,b Neuroscience Research Center, Süleyman Demirel University , Isparta , Turkey
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Koşar PA, Nazıroğlu M, Övey İS, Çiğ B. Synergic Effects of Doxorubicin and Melatonin on Apoptosis and Mitochondrial Oxidative Stress in MCF-7 Breast Cancer Cells: Involvement of TRPV1 Channels. J Membr Biol 2015; 249:129-40. [PMID: 26525975 DOI: 10.1007/s00232-015-9855-0] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2015] [Accepted: 10/14/2015] [Indexed: 01/21/2023]
Abstract
Transient receptor transient receptor potential vanilloid 1 (TRPV1) is a Ca(2+)-permeable channel gated by oxidative stress and capsaicin (CAP) and modulated by melatonin (MEL) and capsazepine (CPZ). A combination of doxorubicin (DOX) and MEL may offer a potential therapy for breast cancer by exerting antitumor and anti-apoptotic effects and modulating Ca(2+) influx and TRPV1 activity. We aimed to investigate the effects of MEL and DOX on the oxidative toxicity of MCF-7 human breast cancer cells, in addition to the activity of the TRPV1 channel and apoptosis. The MCF-7 cells were divided into the following six treatment groups: control, incubated with MEL (0.3 mM), incubated with 0.5 μM DOX, incubated with 1 μM DOX, incubated with MEL + 0.5 μM DOX, or incubated with MEL + 1 μM DOX. The intracellular free Ca(2+) concentration was higher in the DOX groups than in the control, and the concentration was decreased by MEL. The intracellular free Ca(2+) concentration was further increased by treatment with the TRPV1 channel activator CAP (0.01 mM), and it was decreased by the CPZ (0.1 mM). The intracellular production of reactive oxygen species, mitochondrial membrane depolarization, apoptosis level, procaspase 9 and PARP activities, and caspase 3 and caspase 9 activities were higher in the DOX and MEL groups than in the control. Apoptosis and the activity of caspase 9 were further increased in the DOX plus MEL groups. Taken together, the findings indicate that MEL supported the effects of DOX by activation of TRPV1 and apoptosis, as well as by inducing MCF-7 cell death. As the apoptosis and caspase activity of cancer cells increase because of their elevated metabolism, MEL may be useful in supporting their apoptotic capacity.
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Affiliation(s)
- Pınar Aslan Koşar
- Department of Medical Biology, Faculty of Medicine, Suleyman Demirel University, Isparta, Turkey
| | - Mustafa Nazıroğlu
- Department of Biophysics, Faculty of Medicine, Suleyman Demirel University, Isparta, Turkey.
- Neuroscience Research Center, Suleyman Demirel University, Isparta, Turkey.
- Department of Neuroscience, Health Science Institute, Suleyman Demirel University, Isparta, Turkey.
| | - İshak Suat Övey
- Neuroscience Research Center, Suleyman Demirel University, Isparta, Turkey
- Department of Neuroscience, Health Science Institute, Suleyman Demirel University, Isparta, Turkey
| | - Bilal Çiğ
- Neuroscience Research Center, Suleyman Demirel University, Isparta, Turkey
- Department of Neuroscience, Health Science Institute, Suleyman Demirel University, Isparta, Turkey
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Demirci K, Özçankaya R, Yilmaz HR, Yiğit A, Uğuz AC, Karakuş K, Demirdaş A, Akpınar A. Paliperidone regulates intracellular redox system in rat brain: Role of purine mechanism. Redox Rep 2015; 20:170-6. [PMID: 25545018 PMCID: PMC6837464 DOI: 10.1179/1351000214y.0000000122] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
OBJECTIVE The treatment of schizophrenia is multifactorial, with antipsychotic medications comprising a major part of treatment. Paliperidone is a newly commercialized antipsychotic whose formulation includes the principal active metabolite risperidone, 9-hydroxyrisperidone. Ever since the relationship between schizophrenia and oxidative stress was first demonstrated, many studies have been conducted in order to probe the potential protective effects of antipsychotic drugs on the oxidant-antioxidant system and lipid peroxidation. The basic aim of this study is to determine the effects of the newly marketed drug paliperidone on the activities of the enzymes adenosine deaminase (ADA), xanthine oxidase (XO), superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) as well as on malondialdehyde (MDA) and nitric oxide (NO) levels in rat brain tissues. METHODS Twenty male Sprague-Dawley rats were used for the study, which were divided into two equal groups. The first was the control group (n = 10) and the second was the paliperidone group (n = 10). Saline was administered once daily for 14 days in the control group. In the paliperidone group, paliperidone was administered once daily with a dose of 1 mg/kg for 14 days. All rats were sacrificed at the end of the fourteenth day. Brain samples were collected and then analyzed. RESULTS Our results demonstrated that paliperidone significantly decreased the activities of ADA (P = 0.015), XO (P = 0.0001), and CAT (P = 0.004) while insignificantly increasing the activity of SOD (P = 0.49), MDA (P = 0.71), and NO (P = 0.26) levels in rat brain tissues. In addition, paliperidone insignificantly decreased the activity of GSH-Px (P = 0.30) compared to the control group in rat brain tissues. DISCUSSION In conclusion, the data obtained in this study suggest that paliperidone can positively alter antioxidant status and, accordingly, can offer positive outcomes in the treatment of schizophrenia by reducing activity in the enzymes ADA and XO, which are associated with purine metabolism. We believe that such a comprehensive approach used with other antipsychotic drugs warrants further study.
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Affiliation(s)
- Kadir Demirci
- Department of PsychiatryFaculty of Medicine, Suleyman Demirel University, Isparta, Turkey
| | - Ramazan Özçankaya
- Department of PsychiatryFaculty of Medicine, Suleyman Demirel University, Isparta, Turkey
| | - H. Ramazan Yilmaz
- Department of Medical BiologyFaculty of Medicine, Mevlana University, Konya, Turkey
| | - Ayşe Yiğit
- Department of Medical GeneticsFaculty of Medicine, Suleyman Demirel University, Isparta, Turkey
| | | | - Kadir Karakuş
- Deparment of Psychiatry, Isparta State Hospital, Turkey
| | - Arif Demirdaş
- Department of PsychiatryFaculty of Medicine, Suleyman Demirel University, Isparta, Turkey
| | - Abdullah Akpınar
- Department of PsychiatryFaculty of Medicine, Suleyman Demirel University, Isparta, Turkey
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Moghadamtousi SZ, Rouhollahi E, Hajrezaie M, Karimian H, Abdulla MA, Kadir HA. Annona muricata leaves accelerate wound healing in rats via involvement of Hsp70 and antioxidant defence. Int J Surg 2015; 18:110-7. [DOI: 10.1016/j.ijsu.2015.03.026] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Revised: 12/21/2014] [Accepted: 03/16/2015] [Indexed: 01/05/2023]
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Nazıroğlu M, Övey İ. Involvement of apoptosis and calcium accumulation through TRPV1 channels in neurobiology of epilepsy. Neuroscience 2015; 293:55-66. [DOI: 10.1016/j.neuroscience.2015.02.041] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 02/15/2015] [Accepted: 02/20/2015] [Indexed: 12/20/2022]
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Zorofchian Moghadamtousi S, Rouhollahi E, Karimian H, Fadaeinasab M, Firoozinia M, Ameen Abdulla M, Abdul Kadir H. The chemopotential effect of Annona muricata leaves against azoxymethane-induced colonic aberrant crypt foci in rats and the apoptotic effect of Acetogenin Annomuricin E in HT-29 cells: a bioassay-guided approach. PLoS One 2015; 10:e0122288. [PMID: 25860620 PMCID: PMC4393181 DOI: 10.1371/journal.pone.0122288] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Accepted: 02/10/2015] [Indexed: 01/16/2023] Open
Abstract
Annona muricata has been used in folk medicine for the treatment of cancer and tumors. This study evaluated the chemopreventive properties of an ethyl acetate extract of A. muricata leaves (EEAML) on azoxymethane-induced colonic aberrant crypt foci (ACF) in rats. Moreover, the cytotoxic compound of EEAML (Annomuricin E) was isolated, and its apoptosis-inducing effect was investigated against HT-29 colon cancer cell line using a bioassay-guided approach. This experiment was performed on five groups of rats: negative control, cancer control, EEAML (250 mg/kg), EEAML (500 mg/kg) and positive control (5-fluorouracil). Methylene blue staining of colorectal specimens showed that application of EEAML at both doses significantly reduced the colonic ACF formation compared with the cancer control group. Immunohistochemistry analysis showed the down-regulation of PCNA and Bcl-2 proteins and the up-regulation of Bax protein after administration of EEAML compared with the cancer control group. In addition, an increase in the levels of enzymatic antioxidants and a decrease in the malondialdehyde level of the colon tissue homogenates were observed, suggesting the suppression of lipid peroxidation. Annomuricin E inhibited the growth of HT-29 cells with an IC50 value of 1.62 ± 0.24 μg/ml after 48 h. The cytotoxic effect of annomuricin E was further substantiated by G1 cell cycle arrest and early apoptosis induction in HT-29 cells. Annomuricin E triggered mitochondria-initiated events, including the dissipation of the mitochondrial membrane potential and the leakage of cytochrome c from the mitochondria. Prior to these events, annomuricin E activated caspase 3/7 and caspase 9. Upstream, annomuricin E induced a time-dependent upregulation of Bax and downregulation of Bcl-2 at the mRNA and protein levels. In conclusion, these findings substantiate the usage of A. muricata leaves in ethnomedicine against cancer and highlight annomuricin E as one of the contributing compounds in the anticancer activity of A. muricata leaves.
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Affiliation(s)
- Soheil Zorofchian Moghadamtousi
- Biomolecular Research Group, Biochemistry Program, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Elham Rouhollahi
- Department of Biomedical Science, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Hamed Karimian
- Department of Biomedical Science, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Mehran Fadaeinasab
- Department of chemistry, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Mohammad Firoozinia
- Biomolecular Research Group, Biochemistry Program, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Mahmood Ameen Abdulla
- Department of Biomedical Science, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Habsah Abdul Kadir
- Biomolecular Research Group, Biochemistry Program, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
- * E-mail:
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Hosseini A, Sharifi AM, Abdollahi M, Najafi R, Baeeri M, Rayegan S, Cheshmehnour J, Hassani S, Bayrami Z, Safa M. Cerium and yttrium oxide nanoparticles against lead-induced oxidative stress and apoptosis in rat hippocampus. Biol Trace Elem Res 2015; 164:80-9. [PMID: 25516117 DOI: 10.1007/s12011-014-0197-z] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Accepted: 11/27/2014] [Indexed: 01/01/2023]
Abstract
Due to numerous industrial applications, lead has caused widespread pollution in the environment; it seems that the central nervous system (CNS) is the main target for lead in the human body. Oxidative stress and programmed cell death in the CNS have been assumed as two mechanisms related to neurotoxicity of lead. Cerium oxide (CeO2) and yttrium oxide (Y2O3) nanoparticles have recently shown antioxidant effects, particularly when used together, through scavenging the amount of reactive oxygen species (ROS) required for cell apoptosis. We looked into the neuroprotective effects of the combinations of these nanoparticles against acute lead-induced neurotoxicity in rat hippocampus. We used five groups in this study: control, lead, CeO2 nanoparticles + lead, Y2O3 nanoparticles + lead, and CeO2 and Y2O3 nanoparticles + lead. Nanoparticles of CeO2 (1000 mg/kg) and Y2O3 (230 mg/kg) were administered intraperitoneally during 2 days prior to intraperitoneal injection of the lead (25 mg/kg for 3 days). At the end of the treatments, oxidative stress markers, antioxidant enzymes activity, and apoptosis indexes were investigated. The results demonstrated that pretreatments with CeO2 and/or Y2O3 nanoparticles recovered lead-caused oxidative stress markers (ROS, lipid peroxidation, and total thiol molecules) and apoptosis indexes (Bax/Bcl-2 and caspase-3 protein expression). Besides, these nanoparticles reduced the activities of lead-induced superoxide dismutase and catalase as well as the ADP/ATP ratio. Interestingly, the best recovery resulted from the compound of these nanoparticles. Based on these outcomes, it appears that this combination may potentially be beneficial for protection against lead-caused acute toxicity in the brain through improving the oxidative stress-mediated programmed cell death pathway.
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Affiliation(s)
- Asieh Hosseini
- Razi Drug Research Center, Iran University of Medical Sciences, Tehran, 1449614535, Iran,
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Çiğ B, Nazıroğlu M. Investigation of the effects of distance from sources on apoptosis, oxidative stress and cytosolic calcium accumulation via TRPV1 channels induced by mobile phones and Wi-Fi in breast cancer cells. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1848:2756-65. [PMID: 25703814 DOI: 10.1016/j.bbamem.2015.02.013] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Revised: 02/02/2015] [Accepted: 02/10/2015] [Indexed: 12/17/2022]
Abstract
TRPV1 is a Ca2+ permeable channel and gated by noxious heat, oxidative stress and capsaicin (CAP). Some reports have indicated that non-ionized electromagnetic radiation (EMR)-induces heat and oxidative stress effects. We aimed to investigate the effects of distance from sources on calcium signaling, cytosolic ROS production, cell viability, apoptosis, plus caspase-3 and -9 values induced by mobile phones and Wi-Fi in breast cancer cells MCF-7 human breast cancer cell lines were divided into A, B, C and D groups as control, 900, 1800 and 2450 MHz groups, respectively. Cells in Group A were used as control and were kept in cell culture conditions without EMR exposure. Groups B, C and D were exposed to the EMR frequencies at different distances (0 cm, 1 cm, 5 cm, 10 cm, 20 cm and 25 cm) for 1h before CAP stimulation. The cytosolic ROS production, Ca2+ concentrations, apoptosis, caspase-3 and caspase-9 values were higher in groups B, C and D than in A group at 0 cm, 1 cm and 5 cm distances although cell viability (MTT) values were increased by the distances. There was no statistically significant difference in the values between control, 20 and 25 cm. Wi-Fi and mobile phone EMR placed within 10 cm of the cells induced excessive oxidative responses and apoptosis via TRPV1-induced cytosolic Ca2+ accumulation in the cancer cells. Using cell phones and Wi-Fi sources which are farther away than 10 cm may provide useful protection against oxidative stress, apoptosis and overload of intracellular Ca2+. This article is part of a Special Issue entitled: Membrane channels and transporters in cancers.
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Affiliation(s)
- Bilal Çiğ
- Department of Biophysics, Faculty of Medicine, Suleyman Demirel University, Isparta, Turkey
| | - Mustafa Nazıroğlu
- Department of Biophysics, Faculty of Medicine, Suleyman Demirel University, Isparta, Turkey; Neuroscience Research Center, Suleyman Demirel University, Isparta, Turkey.
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Köse SA, Nazıroğlu M. N-acetyl cysteine reduces oxidative toxicity, apoptosis, and calcium entry through TRPV1 channels in the neutrophils of patients with polycystic ovary syndrome. Free Radic Res 2015; 49:338-46. [PMID: 25666878 DOI: 10.3109/10715762.2015.1006214] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Polycystic ovary syndrome (PCOS) is a common inflammatory and oxidant disease with an uncertain pathogenesis. N-acetyl cysteine (NAC) decreases oxidative stress, intracellular free calcium ion [Ca(2+)]i, and apoptosis levels in human neutrophil. We aimed to investigate the effects of NAC on apoptosis, oxidative stress, and Ca(2+) entry through transient receptor potential vanilloid 1 (TRPV1) and TRP melastatin 2 (TRPM2) channels in neutrophils from patients with PCOS. Neutrophils isolated from PCOS group were investigated in three settings: (1) after incubation with TRPV1 channel blocker capsazepine or TRPM2 channel blocker 2-aminoethyl diphenylborinate (2-APB), (2) after supplementation with NAC (for 6 weeks), and (3) with combination (capsazepine + 2-APB + NAC) exposure. The neutrophils in TRPM2 and TRPV1 experiments were stimulated by N-formyl-L-methionyl-L-leucyl-L-phenylalanine (fMLP; 1 μM) and capsaicin (10 μM) as concentration agonists, respectively. Neutrophil lipid peroxidation and capsaicin-induced increase in [Ca(2+)]i concentrations were reduced by capsazepine and NAC treatments. However, the [Ca(2+)]i concentration did not change by fMLP stimulation. Neutrophil lipid peroxidation, apoptosis, caspase-3, caspase-9, cytosolic reactive oxygen species production, and mitochondrial membrane depolarization values were decreased by NAC treatment although neutrophil glutathione peroxidase and reduced glutathione levels were increased by the NAC treatment. Serum lipid peroxidation, luteinizing hormone, testosterone, insulin, interleukin-1 beta, and homocysteine levels were decreased by NAC treatment although serum vitamin A, beta-carotene, vitamin E, and total antioxidant status were increased by the NAC treatment. In conclusion, NAC reduced oxidative stress, apoptosis, cytokine levels, and Ca(2+) entry through TRPV1 channel, which provide supportive evidence that oxidative stress and TRPV1 channel plays a key role in etiology of PCOS.
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Affiliation(s)
- S A Köse
- Department of Obstetrics and Gynecology, Faculty of Medicine, Suleyman Demirel University , Isparta , Turkey
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80
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Zholos AV. TRP Channels in Respiratory Pathophysiology: the Role of Oxidative, Chemical Irritant and Temperature Stimuli. Curr Neuropharmacol 2015; 13:279-91. [PMID: 26411771 PMCID: PMC4598440 DOI: 10.2174/1570159x13666150331223118] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 03/09/2015] [Accepted: 03/09/2015] [Indexed: 12/13/2022] Open
Abstract
There is rapidly growing evidence indicating multiple and important roles of Ca(2+)- permeable cation TRP channels in the airways, both under normal and disease conditions. The aim of this review was to summarize the current knowledge of TRP channels in sensing oxidative, chemical irritant and temperature stimuli by discussing expression and function of several TRP channels in relevant cell types within the respiratory tract, ranging from sensory neurons to airway smooth muscle and epithelial cells. Several of these channels, such as TRPM2, TRPM8, TRPA1 and TRPV1, are discussed in much detail to show that they perform diverse, and often overlapping or contributory, roles in airway hyperreactivity, inflammation, asthma, chronic obstructive pulmonary disease and other respiratory disorders. These include TRPM2 involvement in the disruption of the bronchial epithelial tight junctions during oxidative stress, important roles of TRPA1 and TRPV1 channels in airway inflammation, hyperresponsiveness, chronic cough, and hyperplasia of airway smooth muscles, as well as TRPM8 role in COPD and mucus hypersecretion. Thus, there is increasing evidence that TRP channels not only function as an integral part of the important endogenous protective mechanisms of the respiratory tract capable of detecting and ensuring proper physiological responses to various oxidative, chemical irritant and temperature stimuli, but that altered expression, activation and regulation of these channels may also contribute to the pathogenesis of respiratory diseases.
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Affiliation(s)
- Alexander V Zholos
- Department of Biophysics, Educational and Scientific Centre "Institute of Biology", Taras Shevchenko Kiev National University, 2 Academician Glushkov Avenue, Kiev 03022, Ukraine.
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81
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Liu W, Shang S, Feng X, Zhang G, Wu F. Modulation of exogenous selenium in cadmium-induced changes in antioxidative metabolism, cadmium uptake, and photosynthetic performance in the 2 tobacco genotypes differing in cadmium tolerance. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2015; 34:92-9. [PMID: 25263007 DOI: 10.1002/etc.2760] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 09/01/2014] [Accepted: 09/19/2014] [Indexed: 06/03/2023]
Abstract
Hydroponic experiments were conducted using cadmium (Cd)-sensitive (cv Guiyan 1) and Cd-tolerant (Yunyan 2) tobacco cultivars to evaluate cultivar differences in response to Cd toxicity in the presence of selenium (Se). The results showed that addition of 3 µM Se in 50 µM Cd solution markedly reduced Cd accumulation in plants, alleviated Cd-induced growth inhibition, and increased nitrogen and chlorophyll contents as well as photosynthetic performance (i.e., net photosynthetic rate, stomatal conductance, and transpiration rate). External Se dramatically depressed Cd-induced O2 (•-) , H2 O2 , and malondialdehyde accumulation, especially in the sensitive cultivar. Selenium significantly elevated Cd-depressed activities of superoxide dismutase, peroxidase, catalase, ascorbate peroxidase, glutathione-peroxidase, and glutathione reductase in the both cultivars after 7-d treatments. Meanwhile, Se counteracted Cd-induced alterations in certain nutrient elements; for example, it significantly increased Zn and Ca concentrations and reduced Mg concentration in both cultivars. Furthermore, Se significantly elevated Cd-depressed H(+) -K(+) -adenosine triphosphatase (ATPase), Na(+) -K(+) -ATPase, and Ca(2+) -Mg(2+) -ATPase activities. The beneficial effect of Se under Cd stress may be related mainly to the increased ATPase activity and reduced Cd uptake and reactive oxygen species accumulation, thus reducing the negative consequences of oxidative stress caused by Cd toxicity.
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Affiliation(s)
- Wenxing Liu
- Department of Agronomy, College of Agriculture and Biotechnology, Zijingang Campus, Zhejiang University, Hangzhou, People's Republic of China
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Naseem I, Hassan I, Alhazza IM, Chibber S. Protective effect of riboflavin on cisplatin induced toxicities: a gender-dependent study. J Trace Elem Med Biol 2015; 29:303-14. [PMID: 25242266 DOI: 10.1016/j.jtemb.2014.08.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Revised: 07/06/2014] [Accepted: 08/12/2014] [Indexed: 12/31/2022]
Abstract
The toxicity exerted by the anticancer drug, cisplatin in vivo is functional to many factors such as dose, duration, gender and age etc. The present study is aimed to investigate if ameliorative potential of riboflavin on cisplatin induced toxicity is gender dependent. Eighty four adult mice from male and female sex were divided into seven groups (n=6) for both sexes. They were treated with riboflavin (2mg/kg), cisplatin (2mg/kg) and their two different combinations (cisplatin at 2mg/kg with 1mg/kg and 2mg/kg of riboflavin) under photoillumination with their respective controls for the combination groups without photoillumination. After treatment, all groups were sacrificed and their kidney, liver and serum were collected for biochemical estimations, comet assay and histopathology. In the present investigation, it was evident from antioxidant and detoxification studies (SOD, CAT, GSH, GST, MDA and carbonyl level) that the female mice exhibited better tolerance towards cisplatin inducted toxicity and the ameliorative effect of riboflavin against cisplatin toxicity was found stronger in their combination groups as compared to the male groups as the activity of all antioxidant enzymes were found better concomitant with lower level of MDA and carbonyl contents in the female combination groups than their male counterparts. Furthermore, single cell gel electrophoresis and histopathological examination confirmed that restoration of normal nuclear and cellular integrity was more prominent in female with respect to the males after treatment in the combination groups in a dose-dependent manner. Hence, this study reveals that cisplatin is more toxic in male mice and the ameliorative effect of riboflavin against cisplatin toxicity is stronger in female mice.
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Affiliation(s)
- Imrana Naseem
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh 202002, India
| | - Iftekhar Hassan
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh 202002, India; Department of Zoology, College of Science, King Saud University, Riyadh 11451, Kingdom of Saudi Arabia.
| | - Ibrahim M Alhazza
- Department of Zoology, College of Science, King Saud University, Riyadh 11451, Kingdom of Saudi Arabia
| | - Sandesh Chibber
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh 202002, India
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83
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Guse AH. Calcium mobilizing second messengers derived from NAD. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2014; 1854:1132-7. [PMID: 25534250 DOI: 10.1016/j.bbapap.2014.12.015] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Revised: 12/05/2014] [Accepted: 12/12/2014] [Indexed: 11/18/2022]
Abstract
Nicotinamide adenine dinucleotide (NAD) has been known since a long period of time as co-factor of oxidoreductases. However, in the past couple of decades further roles have been assigned to NAD. Here, metabolism of NAD to the Ca²⁺ mobilizing second messengers cyclic adenosine diphosphoribose, nicotinic acid adenine dinucleotide phosphate and adenosine diphosphoribose is reviewed. Moreover, the mechanisms of Ca²⁺ mobilization by these adenine nucleotides and their putative target Ca²⁺ channels, ryanodine receptors and transient receptor potential channels are discussed. This article is part of a Special Issue entitled: Cofactor-dependent proteins: evolution, chemical diversity and bio-applications.
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Affiliation(s)
- Andreas H Guse
- The Calcium Signalling Group, Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany.
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84
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Ali D. Oxidative stress-mediated apoptosis and genotoxicity induced by silver nanoparticles in freshwater snail Lymnea luteola L. Biol Trace Elem Res 2014; 162:333-41. [PMID: 25351851 DOI: 10.1007/s12011-014-0158-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2014] [Accepted: 10/16/2014] [Indexed: 01/15/2023]
Abstract
Silver is one of the most toxic metals to freshwater aquatic organisms. Limited efforts have been made to study apoptosis and genotoxic potential of silver nanoparticles (AgNPs) in freshwater snail Lymnea luteola L. (L. luteola). Therefore, the present investigation was aimed to study the induction of apoptosis and DNA damage by AgNPs in L. luteola. AgNPs showed molluscicidal activity against L. luteola and three concentrations of AgNPs were selected, the concentration I (4 μg/l), concentration II (12 μg/l), and the concentration III (24 μg/l). Induction of oxidative stress in snail hemolymph was observed by a decrease in reduced glutathione (GSH) and glutathione S-transferase (GST) levels at different concentration of AgNPs, and on the other hand, malondialdehyde (MDA) levels increased at lower concentrations but decreased in higher concentration of AgNPs. Catalase (CAT) activity was also decreased at lower concentrations and increased in higher concentration of AgNPs. Flow cytometry data showed that AgNPs exposed hemocyte cells promote apoptotic and necrotic-mediated cell death when AgNPs concentrations were 12 and 24 μg/l compared to control. DNA damage scores increased with the exposure levels of AgNPs, and dose- and time-dependent effects were observed. A significant positive correlation was observed among reactive oxygen species (ROS) generation, apoptosis, and DNA damage. The study suggests that ROS may be involved in inducing apoptosis and DNA damage in the AgNPs exposed hemocyte cells of L. luteola. This study demonstrates that AgNPs is lethal to freshwater snail L. luteola.
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Affiliation(s)
- Daoud Ali
- Department of Zoology, College of Science, King Saud University, P.O. Box 2454, Riyadh, 11451, Saudi Arabia,
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85
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Wang J, Zhu H, Liu X, Liu Z. Oxidative stress and Ca(2+) signals involved on cadmium-induced apoptosis in rat hepatocyte. Biol Trace Elem Res 2014; 161:180-9. [PMID: 25123461 DOI: 10.1007/s12011-014-0105-6] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 08/08/2014] [Indexed: 01/09/2023]
Abstract
Cadmium (Cd) is an important industrial and environmental pollutant. In animals, the liver is the major target organ of Cd toxicity. In this study, rat hepatocytes were treated with 2.5∼10 μM Cd for various durations. Studies on nuclear morphology, chromatin condensation, and apoptotic cells demonstrate that Cd concentrations ranging within 2.5∼10 μM induced apoptosis. The early-stage marker of apoptosis, i.e., decreased mitochondrial membrane potential, was observed as early as 1.5 h at 5 μM Cd. Significant (P < 0.01) reactive oxygen species (ROS) production at 5 μM Cd and 0.75 h occurred prior to the decrease of the mitochondrial membrane potential, suggesting the involvement of ROS in mitochondrial membrane damage. Glutathione (GSH) level significantly decreased after cell treatment with 5 and 10 μM Cd after 12 h (P < 0.01). Meanwhile, the intracellular free Ca(2+) concentration ([Ca(2+)] i ) of Cd-exposed cells significantly increased (P < 0.01) at 1.5 h, and pretreatment with the calcium chelator Bapta-AM partially blocked Cd-induced apoptosis. This finding indicated that the elevation of [Ca(2+)] i may play an important role in apoptosis. Overall, these results showed that oxidative stress and Ca(2+) signaling were critical mediators of the Cd-induced apoptosis of rat hepatocytes.
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Affiliation(s)
- Jicang Wang
- College of Animal Science and Technology, Henan University of Science and Technology, No. 70 Tianjin Road, Luoyang, 471003, People's Republic of China,
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Övey İS, Naziroğlu M. Homocysteine and cytosolic GSH depletion induce apoptosis and oxidative toxicity through cytosolic calcium overload in the hippocampus of aged mice: involvement of TRPM2 and TRPV1 channels. Neuroscience 2014; 284:225-233. [PMID: 25305668 DOI: 10.1016/j.neuroscience.2014.09.078] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Revised: 09/29/2014] [Accepted: 09/30/2014] [Indexed: 11/15/2022]
Abstract
Oxidative stress and apoptosis were induced in neuronal cultures by inhibition of glutathione (GSH) biosynthesis with d,l-buthionine-S,R-sulfoximine (BSO). Transient receptor potential melastatin 2 (TRPM2) and transient receptor potential vanilloid 1 (TRPV1) cation channels are gated by oxidative stress. The oxidant effects of homocysteine (Hcy) may induce activation of TRPV1 and TRPM2 channels in aged mice as a model of Alzheimer's disease (AD). We tested the effects of Hcy, BSO and GSH on oxidative stress, apoptosis and Ca2+ and influx via TRPM2 and TRPV1 channels in the hippocampus of mice. Native mice hippocampal neurons were divided into five groups as follows; control, Hcy, BSO, Hcy+BSO and Hcy+BSO+GSH groups. The neurons in TRPM2 and TRPV1 experiments were stimulated by hydrogen peroxide and capsaicin, respectively. BSO and Hcy incubations increased intracellular free Ca2+ concentrations, reactive oxygen species, apoptosis, mitochondrial depolarization, and levels of caspase 3 and 9. All of these increases were reduced by GSH treatments. Treatment with 2-aminoethoxydiphenyl borate (2-APB) and N-(p-amylcinnamoyl)anthranilic acid (ACA) as potent inhibitors of TRPM2, capsazepine as a potent inhibitor of TRPV1, verapamil+diltiazem (V+D) as inhibitors of the voltage-gated Ca2+ channels (VGCC) and MK-801 as a N-methyl-d-aspartate (NMDA) channel antagonist indicated that GSH depletion and Hcy elevation activated Ca2+ entry into the neurons through TRPM2, TRPV1, VGCC and NMDA channels. Inhibitor roles of 2-APB and capsazepine on the Ca2+ entry higher than in V+D and MK-801 antagonists. In conclusion, these findings support the idea that GSH depletion and Hcy elevation can have damaging effects on hippocampal neurons by perturbing calcium homeostasis, mainly through TRPM2 and TRPV1 channels. GSH treatment can partially reverse these effects.
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Affiliation(s)
- İ S Övey
- Department of Biophysics, Faculty of Medicine, University of Suleyman Demirel, Isparta, Turkey
| | - M Naziroğlu
- Department of Biophysics, Faculty of Medicine, University of Suleyman Demirel, Isparta, Turkey; Neuroscience Research Center, University of Suleyman Demirel, Isparta, Turkey.
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87
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Ghazizadeh V, Nazıroğlu M. Electromagnetic radiation (Wi-Fi) and epilepsy induce calcium entry and apoptosis through activation of TRPV1 channel in hippocampus and dorsal root ganglion of rats. Metab Brain Dis 2014; 29:787-99. [PMID: 24792079 DOI: 10.1007/s11011-014-9549-9] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Accepted: 04/14/2014] [Indexed: 11/28/2022]
Abstract
Incidence rates of epilepsy and use of Wi-Fi worldwide have been increasing. TRPV1 is a Ca(2+) permeable and non-selective channel, gated by noxious heat, oxidative stress and capsaicin (CAP). The hyperthermia and oxidant effects of Wi-Fi may induce apoptosis and Ca(2+) entry through activation of TRPV1 channel in epilepsy. Therefore, we tested the effects of Wi-Fi (2.45 GHz) exposure on Ca(2+) influx, oxidative stress and apoptosis through TRPV1 channel in the murine dorsal root ganglion (DRG) and hippocampus of pentylentetrazol (PTZ)-induced epileptic rats. Rats in the present study were divided into two groups as controls and PTZ. The PTZ groups were divided into two subgroups namely PTZ + Wi-Fi and PTZ + Wi-Fi + capsazepine (CPZ). The hippocampal and DRG neurons were freshly isolated from the rats. The DRG and hippocampus in PTZ + Wi-Fi and PTZ + Wi-Fi + CPZ groups were exposed to Wi-Fi for 1 hour before CAP stimulation. The cytosolic free Ca(2+), reactive oxygen species production, apoptosis, mitochondrial membrane depolarization, caspase-3 and -9 values in hippocampus were higher in the PTZ group than in the control although cell viability values decreased. The Wi-Fi exposure induced additional effects on the cytosolic Ca(2+) increase. However, pretreatment of the neurons with CPZ, results in a protection against epilepsy-induced Ca(2+) influx, apoptosis and oxidative damages. In results of whole cell patch-clamp experiments, treatment of DRG with Ca(2+) channel antagonists [thapsigargin, verapamil + diltiazem, 2-APB, MK-801] indicated that Wi-Fi exposure induced Ca(2+) influx via the TRPV1 channels. In conclusion, epilepsy and Wi-Fi in our experimental model is involved in Ca(2+) influx and oxidative stress-induced hippocampal and DRG death through activation of TRPV1 channels, and negative modulation of this channel activity by CPZ pretreatment may account for the neuroprotective activity against oxidative stress.
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Affiliation(s)
- Vahid Ghazizadeh
- Neuroscience Research Center, University of Suleyman Demirel, 32260, Isparta, Isparta, Turkey
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88
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Cayir Y, Cayir A, Turan MI, Kurt N, Kara M, Laloglu E, Ciftel M, Yildirim A. Antioxidant status in blood of obese children: the relation between trace elements, paraoxonase, and arylesterase values. Biol Trace Elem Res 2014; 160:155-60. [PMID: 24920129 DOI: 10.1007/s12011-014-0038-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 06/03/2014] [Indexed: 01/31/2023]
Abstract
Obesity is known to lead to complications involving several systems. The basic mechanism in obesity-related complications is chronic inflammation and increased oxidative stress. Trace element levels in obese children may vary due to poor nutritional habits. The purpose of this study was to investigate the relation between serum paraoxonase (PON1) and arylesterase (ARE) levels, markers of the oxidant-antioxidant balance in the body, and serum zinc (Zn), copper (Cu), manganese (Mn), and selenium (Se) concentrations in obese children. Fifty-seven overweight patients aged 6-17 and 48 age- and sex-matched healthy children were included in the study. Serum PON1 and ARE activity levels were measured, together with Cu, Zn, Mn, Se, total cholesterol, triglyceride, low-density lipoprotein, high-density lipoprotein, very low-density lipoprotein, glucose, aspartate amino transferase, and alanine amino transferase levels. PON1 and ARE activity levels were significantly lower in obese patients compared to those in healthy individuals (P < 0.05). Various changes were determined in Cu, Zn, Mn, and Se levels between the study and control groups (P < 0.05). In terms of the relation between trace elements and PON1 and ARE levels, a significant positive correlation was determined between serum Se and PON1 levels in the study group (P < 0.05, r = 0.31). No significant correlation was determined between other trace element levels and PON1 and ARE levels (P > 0.05). In conclusion, the detection in our study of a positive correlation between Se and PON1 levels in obese children may be significant in terms of showing a relation between Se and antioxidant systems in obese children.
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Affiliation(s)
- Yasemin Cayir
- Faculty of Medicine, Department of Family Medicine, Ataturk University, Erzurum, Turkey
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89
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You L, Liu C, Yang ZJ, Li M, Li S. Prediction of selenoprotein T structure and its response to selenium deficiency in chicken immune organs. Biol Trace Elem Res 2014; 160:222-31. [PMID: 24958020 DOI: 10.1007/s12011-014-0049-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Accepted: 06/16/2014] [Indexed: 01/15/2023]
Abstract
Selenoprotein T (SelT) is associated with the regulation of calcium homeostasis and neuroendocrine secretion. SelT can also change cell adhesion and is involved in redox regulation and cell fixation. However, the structure and function of chicken SelT and its response to selenium (Se) remains unclear. In the present study, 150 1-day-old chickens were randomly divided into a low Se group (L group, fed a Se-deficient diet containing 0.020 mg/kg Se) and a control group (C group, fed a diet containing sodium selenite at 0.2 mg/kg Se). The immune organs (spleen, thymus, and bursa of Fabricius) were collected at 15, 25, 35, 45, and 55 days of age. We performed a sequence analysis and predicted the structure and function of SelT. We also investigated the effects of Se deficiency on the expression of SelT, selenophosphate synthetase-1 (SPS1), and selenocysteine synthase (SecS) using RT-PCR and the oxidative stress in the chicken immune organs. The data showed that the coding sequence (CDS) and deduced amino acid sequence of SelT were highly similar to those of 17 other animals. Se deficiency induced lower (P < 0.05) levels of SelT, SPS1, and SecS, reduced the catalase (CAT) activity, and increased the levels of hydrogen peroxide (H2O2) and hydroxyl radical (-OH) in immune organs. In conclusion, the CDS and deduced amino acid sequence of chicken SelT are highly homologous to those of various mammals. The redox function and response to the Se deficiency of chicken SelT may be conserved. A Se-deficient diet led to a decrease in SelT, SecS, and SPS1 and induced oxidative stress in the chicken immune organs. To our knowledge, this is the first report of predictions of chicken SelT structure and function. The present study demonstrated the relationship between the selenoprotein synthases (SPS1, SecS) and SelT expression in the chicken immune organs and further confirmed oxidative stress caused by Se deficiency. Thus, the information presented in this study is helpful to understand chicken SelT structure and function. Meanwhile, the present research also confirmed the negative effects of Se deficiency on chicken immune organs.
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Affiliation(s)
- Lu You
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
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90
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Tyszka-Czochara M, Paśko P, Reczyński W, Szlósarczyk M, Bystrowska B, Opoka W. Zinc and propolis reduces cytotoxicity and proliferation in skin fibroblast cell culture: total polyphenol content and antioxidant capacity of propolis. Biol Trace Elem Res 2014; 160:123-31. [PMID: 24913100 PMCID: PMC4065375 DOI: 10.1007/s12011-014-0019-3] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Accepted: 05/14/2014] [Indexed: 12/21/2022]
Abstract
It has been demonstrated that zinc exerts its beneficial influence on skin fibroblasts. Propolis, a complex mixture of plant-derived and bees' products, was reported to stimulate cicatrization processes in skin and prevent infections. The aim of this study was to find out how zinc and propolis influence human skin fibroblasts in cell culture and to compare the effect of individual compounds to the effect of a mixture of zinc and propolis. In this study, zinc, as zinc aspartate, at a concentration of 16 μM, increased human fibroblasts proliferation in cell culture, whereas propolis at a concentration of 0.01% (w/v) revealed antiproliferative and cytotoxic action followed by mild cell necrosis. In culture, zinc was effectively transported into fibroblasts, and propolis inhibited the amount of zinc incorporated into the cells. An addition of propolis to the medium caused a decrease in the Zn(II) amount incorporated into fibroblasts. The obtained results also indicate an appreciable antioxidant property of propolis and revealed its potential as a supplement when applied at doses lower than 0.01% (w/v). In conclusion, the present study showed that zinc had a protective effect on human cultured fibroblasts' viability, although propolis revealed its antiproliferative action and caused mild necrosis.
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Affiliation(s)
- Małgorzata Tyszka-Czochara
- Department of Radioligands, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688, Kraków, Poland,
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91
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Choi DJ, Kim SL, Choi JW, Park YI. Neuroprotective effects of corn silk maysin via inhibition of H2O2-induced apoptotic cell death in SK-N-MC cells. Life Sci 2014; 109:57-64. [PMID: 24928367 DOI: 10.1016/j.lfs.2014.05.020] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 04/21/2014] [Accepted: 05/30/2014] [Indexed: 02/04/2023]
Abstract
AIMS Neuroprotective effects of maysin, which is a flavone glycoside that was isolated from the corn silk (CS, Zea mays L.) of a Korean hybrid corn Kwangpyeongok, against oxidative stress (H2O2)-induced apoptotic cell death of human neuroblastoma SK-N-MC cells were investigated. MAIN METHODS Maysin cytotoxicity was determined by measuring cell viability using MTT and lactate dehydrogenase (LDH) assays. Intracellular reactive oxygen species (ROS) were measured using a 2,7-dichlorofluorescein diacetate (DCF-DA) assay. Apoptotic cell death was monitored by annexin V-FITC/PI double staining and by a TUNEL assay. Antioxidant enzyme mRNA levels were determined by real-time PCR. The cleavage of poly (ADP-ribose) polymerase (PARP) was measured by western blotting. KEY FINDINGS Maysin pretreatment reduced the cytotoxic effect of H2O2 on SK-N-MC cells, as shown by the increase in cell viability and by reduced LDH release. Maysin pretreatment also dose-dependently reduced the intracellular ROS level and inhibited PARP cleavage. In addition, DNA damage and H2O2-induced apoptotic cell death were significantly attenuated by maysin pretreatment. Moreover, maysin pretreatment (5-50 μg/ml) for 2h significantly and dose-dependently increased the mRNA levels of antioxidant enzymes (CAT, GPx-1, SOD-1, SOD-2 and HO-1) in H2O2 (200 μM)-insulted cells. SIGNIFICANCE These results suggest that CS maysin has neuroprotective effects against oxidative stress (H2O2)-induced apoptotic death of human brain SK-N-MC cells through its antioxidative action. This report is the first regarding neuroprotective health benefits of corn silk maysin by its anti-apoptotic action and by triggering the expression of intracellular antioxidant enzyme systems in SK-N-MC cells.
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Affiliation(s)
- Doo Jin Choi
- Department of Biotechnology, The CUK Agromedical Research Center, The Catholic University of Korea, Bucheon, Gyeonggi-do 420-743, Republic of Korea
| | - Sun-Lim Kim
- National Institute of Crop Science, RDA, Suwon, Gyeonggi-do 441-857, Republic of Korea
| | - Ji Won Choi
- Department of Biotechnology, The CUK Agromedical Research Center, The Catholic University of Korea, Bucheon, Gyeonggi-do 420-743, Republic of Korea
| | - Yong Il Park
- Department of Biotechnology, The CUK Agromedical Research Center, The Catholic University of Korea, Bucheon, Gyeonggi-do 420-743, Republic of Korea.
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92
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Guler I, Himmetoglu O, Turp A, Erdem A, Erdem M, Onan MA, Taskiran C, Taslipinar MY, Guner H. Zinc and homocysteine levels in polycystic ovarian syndrome patients with insulin resistance. Biol Trace Elem Res 2014; 158:297-304. [PMID: 24664271 DOI: 10.1007/s12011-014-9941-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Accepted: 03/09/2014] [Indexed: 01/03/2023]
Abstract
In this study, our objective was to evaluating the value of serum zinc levels as an etiologic and prognostic marker in patients with polycystic ovarian syndrome. We conducted a prospective study, including 53 women with polycystic ovarian syndrome and 33 healthy controls. We compared serum zinc levels, as well as clinical and metabolic features, of the cases. We also compared serum zinc levels between patients with polycystic ovarian syndrome with insulin resistance. Mean zinc levels were found to be significantly lower in patients with polycystic ovarian syndrome than healthy controls. Multiple logistic regression analysis of significant metabolic variables between polycystic ovarian syndrome and control groups (serum zinc level, body mass index, the ratio of triglyceride/high-density lipoprotein cholesterol, and homocysteine) revealed that zinc level was the most significant variable to predict polycystic ovarian syndrome. Mean serum zinc levels tended to be lower in patients with polycystic ovarian syndrome with impaired glucose tolerance than patients with normal glucose tolerance, but the difference was not statistically significant. In conclusion, zinc deficiency may play a role in the pathogenesis of polycystic ovarian syndrome and may be related with its long-term metabolic complications.
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Affiliation(s)
- Ismail Guler
- Department of Obstetrics & Gynecology, Faculty of Medicine, Gazi University, 06500 Besevler, Ankara, Turkey,
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93
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Kiełczykowska M, Kocot J, Kurzepa J, Lewandowska A, Żelazowska R, Musik I. Could selenium administration alleviate the disturbances of blood parameters caused by lithium administration in rats? Biol Trace Elem Res 2014; 158:359-64. [PMID: 24676629 PMCID: PMC4012153 DOI: 10.1007/s12011-014-9952-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Accepted: 03/18/2014] [Indexed: 11/25/2022]
Abstract
Lithium is widely used in medicine, but its administration can cause numerous side effects. The present study aimed at the evaluation of the possible application of selenium, an essential and antioxidant element, as a protective agent against lithium toxicity. The experiment was performed on four groups of Wistar rats: I (control)-treated with saline, II (Li)-treated with lithium (Li2CO3), III (Se)-treated with selenium (Na2SeO3) and IV (Li + Se)-treated with lithium and selenium (Li2CO3 and Na2SeO3) in the form of water solutions by stomach tube for 6 weeks. The following biochemical parameters were measured: concentrations of sodium, potassium, calcium, magnesium, phosphorus, iron, urea, creatinine, cholesterol, glucose, total protein and albumin and activities of alkaline phosphatase, aspartate aminotransferase and alanine aminotransferase in serum as well as whole blood superoxide dismutase and glutathione peroxidase. Morphological parameters such as red blood cells, haemoglobin, haematocrit, mean corpuscular volume, mean corpuscular haemoglobin, mean corpuscular haemoglobin concentration, platelets, white blood cells, neutrophils as well as lymphocytes were determined. Lithium significantly increased serum calcium and glucose (2.65 ± 0.17 vs. 2.43 ± 0.11; 162 ± 31 vs. 121 ± 14, respectively), whereas magnesium and albumin were decreased (1.05 ± 0.08 vs. 1.21 ± 0.15; 3.85. ± 0.12 vs. 4.02 ± 0.08, respectively). Selenium given with lithium restored these parameters to values similar to those observed in the control (Ca-2.49 ± 0.08, glucose-113 ± 26, Mg-1.28 ± 0.09, albumin-4.07 ± 0.11). Se alone or co-administered with Li significantly increased aspartate aminotransferase and glutathione peroxidase. The obtained outcomes let us suggest that the continuation of research on the application of selenium as an adjuvant in lithium therapy seems warranted.
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Affiliation(s)
- Małgorzata Kiełczykowska
- Chair and Department of Medical Chemistry, Medical University of Lublin, Chodźki 4a, 20-093 Lublin, Poland
| | - Joanna Kocot
- Chair and Department of Medical Chemistry, Medical University of Lublin, Chodźki 4a, 20-093 Lublin, Poland
| | - Jacek Kurzepa
- Chair and Department of Medical Chemistry, Medical University of Lublin, Chodźki 4a, 20-093 Lublin, Poland
| | - Anna Lewandowska
- Chair and Department of Medical Chemistry, Medical University of Lublin, Chodźki 4a, 20-093 Lublin, Poland
| | - Renata Żelazowska
- Chair and Department of Medical Chemistry, Medical University of Lublin, Chodźki 4a, 20-093 Lublin, Poland
| | - Irena Musik
- Chair and Department of Medical Chemistry, Medical University of Lublin, Chodźki 4a, 20-093 Lublin, Poland
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94
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Chtourou Y, Fetoui H, Gdoura R. Protective effects of naringenin on iron-overload-induced cerebral cortex neurotoxicity correlated with oxidative stress. Biol Trace Elem Res 2014; 158:376-83. [PMID: 24682942 DOI: 10.1007/s12011-014-9948-0] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Accepted: 03/17/2014] [Indexed: 01/12/2023]
Abstract
Iron is a component of several metalloproteins involved in crucial metabolic processes such as oxygen sensing and transport, energy metabolism, and DNA synthesis. This metal progressively accumulates in the pathogenesis of Alzheimer's (AD) and Parkinson's (PD) diseases. Naringenin (NGEN), a natural flavonoid compound, has been reported to possess neuroprotective effect against PD-related pathology, however, the mechanisms underlying its beneficial effects are poorly defined. Thus, the aim of this study is to investigate the potential mechanism involved in the cytoprotection of NGEN against iron-induced neurotoxicity in the cerebral cortex of Wistar rats. Animals that were given repetitive injections of iron dextran for a total of 4 weeks showed a significant increase in lipid and protein markers such as thiobarbituric reactive acid substances, protein carbonyl product content levels, and DNA apoptosis in the cerebral cortex. These changes were accompanied by a decrease of enzymatic antioxidants like superoxide dismutase and catalase and in the levels of nonenzymatic antioxidants like total thiols and ascorbic acid. The activity of glutathione peroxidase remained unchanged in rats. A significant decrease in acetylcholinesterase and Na(+)/K(+)-ATPase activities was also shown, with a substantial rise in the nitric oxide levels. Coadministration of NGEN to iron-treated rats significantly improved antioxidant enzyme activities and attenuated oxidative damages observed in the cerebral cortex. The potential effect of NGEN to prevent iron-induced neurotoxicity was also reflected by the microscopic study, indicative of its neuroprotective effects.
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Affiliation(s)
- Yassine Chtourou
- Toxicology-Microbiology and Environmental Health (UR11ES70), Faculty of Sciences, University of Sfax, BP1171, 3000, Sfax, Tunisia,
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95
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Xu JX, Cao CY, Sun YC, Wang LL, Li N, Xu SW, Li JL. Effects on liver hydrogen peroxide metabolism induced by dietary selenium deficiency or excess in chickens. Biol Trace Elem Res 2014; 159:174-82. [PMID: 24819086 DOI: 10.1007/s12011-014-0002-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Accepted: 04/28/2014] [Indexed: 01/15/2023]
Abstract
To determine the relationship between dietary selenium (Se) deficiency or excess and liver hydrogen peroxide (H2O2) metabolism in chickens, 1-day-old chickens received insufficient Se (0.028 mg Se per kg of diet) or excess Se (3.0 or 5.0 mg Se per kg of diet) in their diets for 8 weeks. Body and liver weight changes, alanine aminotransferase (ALT) and aspartate aminotransferase (AST) activities, H2O2 content, and activities and mRNA levels of enzymes associated with H2O2 metabolism (catalase (CAT) and superoxide dismutase (SOD) 1-3) were determined in the liver. This study showed that Se deficiency or excess Se intake elicited relative severe changes. Se deficiency decreased growth, while Se excess promoted growth in chickens. Both diets vastly altered the liver function, but no obvious histopathological changes were observed in the liver. Se deficiency significantly lowered SOD and CAT activities, and the H2O2 content in the liver and serum increased. Se excess (3.0 mg/kg) decreased SOD and CAT activities with changes in their mRNA levels, and the H2O2 content increased. The larger Se excess (5.0 mg/kg) showed more serious effects but was not fatal. These results indicated that the H2O2 metabolism played a destructive role in the changes in bird liver function induced by Se deficiency or excess.
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Affiliation(s)
- Jing-Xiu Xu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
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96
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Nocchi L, Daly DM, Chapple C, Grundy D. Induction of oxidative stress causes functional alterations in mouse urothelium via a TRPM8-mediated mechanism: implications for aging. Aging Cell 2014; 13:540-50. [PMID: 24593692 PMCID: PMC4326884 DOI: 10.1111/acel.12208] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/05/2014] [Indexed: 12/18/2022] Open
Abstract
The incidence of bladder conditions such as overactive bladder syndrome and its associated urinary incontinence is highly prevalent in the elderly. However, the mechanisms underlying these disorders are unclear. Studies suggest that the urothelium forms a ‘sensory network’ with the underlying innervation, alterations in which, could compromise bladder function. As the accumulation of reactive oxygen species can cause functional alterations with age, the aim of this study was to investigate whether oxidative stress alters urothelial sensory signalling and whether the mechanism underlying the effect of oxidative stress on the urothelium plays a role in aging. Five-month-old(young) and 24-month-old (aged) mice were used. H2O2, used to induce oxidative stress, resulted in an increase in bladder afferent nerve activity and urothelial intracellular calcium in preparations from young mice. These functional changes were concurrent with upregulation of TRPM8 in the urothelium. Moreover, application of a TRPM8 antagonist significantly attenuated the H2O2-induced calcium responses. Interestingly, an upregulation of TRPM8 was also found in the urothelium from aged mice, where high oxidative stress levels were observed, together with a greater calcium response to the TRPM8 agonist WS12. Furthermore, these calcium responses were attenuated by pretreatment with the antioxidant N-acetyl-cysteine. This study shows that oxidative stress affects urothelial function involving a TRPM8-mediated mechanism and these effects may have important implications for aging. These data provide an insight into the possible mechanisms by which oxidative stress causes physiological alterations in the bladder, which may also occur in other organs susceptible to aging.
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Affiliation(s)
- Linda Nocchi
- Department of Biomedical Science; University of Sheffield; Western Bank; Sheffield S10 2TN UK
| | - Donna M. Daly
- Department of Biomedical Science; University of Sheffield; Western Bank; Sheffield S10 2TN UK
| | - Christopher Chapple
- Department of Urology; Royal Hallamshire Hospital; Glossop Road Sheffield S10 2JF UK
| | - David Grundy
- Department of Biomedical Science; University of Sheffield; Western Bank; Sheffield S10 2TN UK
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97
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Şenol N, Nazıroğlu M. Melatonin reduces traumatic brain injury-induced oxidative stress in the cerebral cortex and blood of rats. Neural Regen Res 2014; 9:1112-6. [PMID: 25206769 PMCID: PMC4146095 DOI: 10.4103/1673-5374.135312] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/03/2014] [Indexed: 01/17/2023] Open
Abstract
Free radicals induced by traumatic brain injury have deleterious effects on the function and antioxidant vitamin levels of several organ systems including the brain. Melatonin possesses antioxidant effect on the brain by maintaining antioxidant enzyme and vitamin levels. We investigated the effects of melatonin on antioxidant ability in the cerebral cortex and blood of traumatic brain injury rats. Results showed that the cerebral cortex β-carotene, vitamin C, vitamin E, reduced glutathione, and erythrocyte reduced glutathione levels, and plasma vitamin C level were decreased by traumatic brain injury whereas they were increased following melatonin treatment. In conclusion, melatonin seems to have protective effects on traumatic brain injury-induced cerebral cortex and blood toxicity by inhibiting free radical formation and supporting antioxidant vitamin redox system.
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Affiliation(s)
- Nilgün Şenol
- Department of Neurosurgery, Faculty of Medicine, University of Suleyman Demirel, Isparta, Turkey
| | - Mustafa Nazıroğlu
- Neuroscience Research Center, University of Suleyman Demirel, Isparta, Turkey
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98
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Tang QQ, Su SY, Fang MY. Zinc supplement modulates oxidative stress and antioxidant values in rats with severe acute pancreatitis. Biol Trace Elem Res 2014; 159:320-4. [PMID: 24771310 DOI: 10.1007/s12011-014-9971-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Accepted: 04/08/2014] [Indexed: 02/08/2023]
Abstract
Oxidative stress is a main factor in the pathogenesis of severe acute pancreatitis (SAP). The ability of zinc (Zn) to retard oxidative processes has been recognized for many years. This study aims to examine the levels of free oxygen radicals and antioxidant enzyme in SAP rats and know the effect of Zn supplementation on free oxygen radicals and antioxidant system in rats with SAP. Forty-five male Wistar rats were divided into three groups-the SAP group (n=15), the Zn-treated group (n=15), and the controlled group (n=15). For the SAP group, sodium taurocholate is injected into the pancreatic duct to induce SAP; for the Zn-treated group, Zn (5 mg/kg) is subcutaneously injected immediately after injection of 5% sodium taurocholate. Firstly, the activity of erythrocyte glutathione peroxidase (GSH-Px), erythrocyte superoxide dismutase (SOD), and the content of plasma malondialdehyde (MDA), which are the toxic products of oxidative stress, is measured. Secondly, the levels of free oxygen radicals in the liver and kidney are detected. The result showed that the activity of GSH-Px and SOD was lower in the SAP group than that in the controlled group, although the content of plasma MDA increased. However, the activity of SOD and GSH-Px in the Zn-treated group was not significantly decreased after comparing with the controlled group; in the mean time, the content of MDA was not significantly increased either. Moreover, the content of free radical in liver and kidney was higher in the SAP group compared with the controlled group, but the content of free radical in the Zn-treated group was not higher than that in the controlled group (p>0.05). All of the above indicated that Zn may recover the activity of free radical-scavenging enzymes and decrease the content of free radical for the SAP group rats. In conclusion, the content of free radical increase may be one of the reasons that SAP rats are injured, and it is possible for Zn to be used to treat SAP through scavenging free radical and increasing the activity of SOD and GSH-Px of erythrocyte.
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Affiliation(s)
- Qin-qing Tang
- Department of Emergency Medicine, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China, 230022
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Tök L, Nazıroğlu M, Uğuz AC, Tök Ö. Elevated hydrostatic pressures induce apoptosis and oxidative stress through mitochondrial membrane depolarization in PC12 neuronal cells: A cell culture model of glaucoma. J Recept Signal Transduct Res 2014; 34:410-6. [DOI: 10.3109/10799893.2014.910812] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Lu S, Yu L, Mu Y, Ma J, Tian J, Xu W, Wang H. Role and mechanism of Twist1 in modulating the chemosensitivity of FaDu cells. Mol Med Rep 2014; 10:53-60. [PMID: 24805866 PMCID: PMC4068721 DOI: 10.3892/mmr.2014.2212] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Accepted: 04/02/2014] [Indexed: 12/14/2022] Open
Abstract
Multidrug resistance (MDR) is one of the most important obstacles affecting the efficacy of chemotherapy treatments for numerous types of cancer. In the present study, we have demonstrated the possible function of Twist1 in the chemosensitivity of head and neck squamous cell carcinoma (HNSCC) and have identified that its mechanism maybe associated with MDR1/P-gp regulation. To investigate this, the hypopharyngeal cancer cell line, FaDu, and its MDR cell line induced by taxol, FaDu/T, were employed. Stable transfectants targeted to Twist1 overexpression and Twist1 silencing based on FaDu were also conducted. Morphological observation, flow cytometry, reverse transcription-polymerase chain reaction (RT-PCR), western blotting and laser scanning confocal microscope detection were utilized to detect the associations between Twist1 and the chemosensitivity of FaDu cells. Our results demonstrated that Twist1 and MDR1/P-gp were upregulated in FaDu/T cells in a MDR dose-dependent manner. The anti-apoptotic capabilities of FaDu/T cells were enhanced during MDR progression, with apoptosis-related proteins (Bcl-2, Bax, activated caspase-3 and caspase-9) changing to resist apoptosis. Twist1 overexpression decreased the sensitivity of cells to taxol as revealed by a significant increase in MDR1/P-gp and IC50 (P<0.05). This overexpression also enhanced the resistance to apoptosis, with apoptotic proteins changing to resist cell death, and inhibited Ca2+ release induced by taxol (P<0.05). Detections in Twist1 silencing cells also confirmed this result. This study provided evidence that alterations of Twist1 expression modulates the chemosensitivity of FaDu cells to taxol. Therefore, Twist1 knockdown may be a promising treatment regimen for advanced hypopharyngeal carcinoma patients with MDR.
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Affiliation(s)
- Sumei Lu
- Department of Otorhinolaryngology Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250022, P.R. China
| | - Liang Yu
- Department of Otorhinolaryngology Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250022, P.R. China
| | - Yakui Mu
- Department of Otorhinolaryngology Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250022, P.R. China
| | - Juke Ma
- Department of Otorhinolaryngology Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250022, P.R. China
| | - Jiajun Tian
- Department of Otorhinolaryngology Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250022, P.R. China
| | - Wei Xu
- Department of Otorhinolaryngology Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250022, P.R. China
| | - Haibo Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250022, P.R. China
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