1
|
Ishii T, Warabi E, Mann GE. Mechanisms underlying Nrf2 nuclear translocation by non-lethal levels of hydrogen peroxide: p38 MAPK-dependent neutral sphingomyelinase2 membrane trafficking and ceramide/PKCζ/CK2 signaling. Free Radic Biol Med 2022; 191:191-202. [PMID: 36064071 DOI: 10.1016/j.freeradbiomed.2022.08.036] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 08/22/2022] [Accepted: 08/29/2022] [Indexed: 12/14/2022]
Abstract
Hydrogen peroxide is an aerobic metabolite playing a central role in redox signaling and oxidative stress. H2O2 could activate redox sensitive transcription factors, such as Nrf2, AP-1 and NF-κB by different manners. In some cells, treatment with non-lethal levels of H2O2 induces rapid activation of Nrf2, which upregulates expression of a set of genes involved in glutathione (GSH) synthesis and defenses against oxidative damage. It depends on two steps, the rapid translational activation of Nrf2 and facilitation of Nrf2 nuclear translocation. We review the molecular mechanisms by which H2O2 induces nuclear translocation of Nrf2 in cultured cells by highlighting the role of neutral sphingomyelinase 2 (nSMase2), a GSH sensor. H2O2 enters cells through aquaporin channels in the plasma membrane and is rapidly reduced to H2O by GSH peroxidases to consume cellular GSH, resulting in nSMase2 activation to generate ceramide. H2O2 also activates p38 MAP kinase, which enhances transfer of nSMase2 from perinuclear regions to plasma membrane lipid rafts to accelerate ceramide generation. Low levels of ceramide activate PKCζ, which then activates casein kinase 2 (CK2). These protein kinases are able to phosphorylate Nrf2 to stabilize and activate it. Notably, Nrf2 also binds to caveolin-1 (Cav1), which protects Nrf2 from Keap1-mediated degradation and limits Nrf2 nuclear translocation. We propose that Cav1serves as a signaling hub for the control of H2O2-mediated phosphorylation of Nrf2 by kinases, which results in release of Nrf2 from Cav1 to facilitate nuclear translocation. In summary, H2O2 induces GSH depletion which is recovered by Nrf2 activation dependent on p38/nSMase2/ceramide signaling.
Collapse
Affiliation(s)
- Tetsuro Ishii
- School of Medicine, University of Tsukuba, Tsukuba, Ibaraki, 305-8577, Japan.
| | - Eiji Warabi
- School of Medicine, University of Tsukuba, Tsukuba, Ibaraki, 305-8577, Japan.
| | - Giovanni E Mann
- King's British Heart Foundation Centre of Research Excellence, School of Cardiovascular and Metabolic Medicine & Sciences, Faculty of Life Sciences & Medicine, King's College London, 150 Stamford Street, London, SE1 9NH, UK.
| |
Collapse
|
2
|
Zhang Q, Zhang J, Liu B, Wei J. Licochalcone E inhibits trxR1 expression, alters Nrf2/STAT6 signal, and induces antitumor effects in vitro against human SH-SY5Y and SK-N-BE(2) neuroblastoma cells. ENVIRONMENTAL TOXICOLOGY 2022; 37:1173-1184. [PMID: 35092341 DOI: 10.1002/tox.23474] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 12/08/2021] [Accepted: 01/16/2022] [Indexed: 06/14/2023]
Abstract
Neuroblastoma (NB) is the most common solid tumor of the sympathetic nervous system (SNS) arising in childhood less than 15 years age. Licochalcone (Lic) is known to show inhibitory effects in cancer growth, and there has evidence suggested that Lic A inhibits hypoxic induced NB SK-N-SH cell proliferation. However, it is unclear whether LicE exerts similar effects in NB and the associated molecular mechanism of Lic in neuroblastoma is still unclear. In the current study, we found that LicE at the concentration 2, 4 and 6 μM all induced a profound reduction in cell viability, colony formation and cell proliferation. Next, LicE treatment effectively promoted cell apoptosis, inhibited cell migration and invasion. LicE significantly suppressed trxR1 expression, activated Nrf2 expression and inhibited STAT6 expression in SH-SY5Y and SK-N-BE(2) NB cells. We further identified that trxR1, STAT6 overexpression or Nrf2 silence reversed the antitumor effects of LicE in human SH-SY5Y and SK-N-BE(2) NB cells. Finally, LicE treatment significantly inhibited tumor growth in nude mice carrying a SK-N-SH cell xenograft. These results provide new insights into the effects and highlighting a novel mechanism of LicE through regulating trxR1/Nrf2/STAT6 signal pathway in NB.
Collapse
Affiliation(s)
- Qian Zhang
- Department of Ultrasound, Xi'an Children's Hospital, Xi'an, China
| | - Jingjing Zhang
- Department of Ultrasound, Xi'an Children's Hospital, Xi'an, China
| | - Bailing Liu
- Department of Ultrasound, Xi'an Children's Hospital, Xi'an, China
| | - Jingli Wei
- Department of Ultrasound, Xi'an Children's Hospital, Xi'an, China
| |
Collapse
|
3
|
Castelli S, De Falco P, Ciccarone F, Desideri E, Ciriolo MR. Lipid Catabolism and ROS in Cancer: A Bidirectional Liaison. Cancers (Basel) 2021; 13:cancers13215484. [PMID: 34771647 PMCID: PMC8583096 DOI: 10.3390/cancers13215484] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 10/28/2021] [Accepted: 10/28/2021] [Indexed: 12/14/2022] Open
Abstract
Although cancer cell metabolism was mainly considered to rely on glycolysis, with the concomitant impairment of mitochondrial metabolism, it has recently been demonstrated that several tumor types are sustained by oxidative phosphorylation (OXPHOS). In this context, endogenous fatty acids (FAs) deriving from lipolysis or lipophagy are oxidised into the mitochondrion, and are used as a source of energy through OXPHOS. Because the electron transport chain is the main source of ROS, cancer cells relying on fatty acid oxidation (FAO) need to be equipped with antioxidant systems that maintain the ROS levels under the death threshold. In those conditions, ROS can act as second messengers, favouring proliferation and survival. Herein, we highlight the different responses that tumor cells adopt when lipid catabolism is augmented, taking into account the different ROS fates. Many papers have demonstrated that the pro- or anti-tumoral roles of endogenous FA usage are hugely dependent on the tumor type, and on the capacity of cancer cells to maintain redox homeostasis. In light of this, clinical studies have taken advantage of the boosting of lipid catabolism to increase the efficacy of tumor therapy, whereas, in other contexts, antioxidant compounds are useful to reduce the pro-survival effects of ROS deriving from FAO.
Collapse
Affiliation(s)
- Serena Castelli
- Department of Biology, University of Rome “Tor Vergata”, Via Della Ricerca Scientifica 1, 00133 Rome, Italy; (S.C.); (P.D.F.); (E.D.)
| | - Pamela De Falco
- Department of Biology, University of Rome “Tor Vergata”, Via Della Ricerca Scientifica 1, 00133 Rome, Italy; (S.C.); (P.D.F.); (E.D.)
| | - Fabio Ciccarone
- IRCCS San Raffaele Pisana, Department of Human Sciences and Promotion of the Quality of Life, San Raffaele Roma Open University, 00166 Rome, Italy;
| | - Enrico Desideri
- Department of Biology, University of Rome “Tor Vergata”, Via Della Ricerca Scientifica 1, 00133 Rome, Italy; (S.C.); (P.D.F.); (E.D.)
| | - Maria Rosa Ciriolo
- Department of Biology, University of Rome “Tor Vergata”, Via Della Ricerca Scientifica 1, 00133 Rome, Italy; (S.C.); (P.D.F.); (E.D.)
- IRCCS San Raffaele Pisana, Via Della Pisana 235, 00163 Rome, Italy
- Correspondence:
| |
Collapse
|
4
|
Liu H, Zhu S, Han W, Cai Y, Liu C. DMEP induces mitochondrial damage regulated by inhibiting Nrf2 and SIRT1/PGC-1α signaling pathways in HepG2 cells. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 221:112449. [PMID: 34214916 DOI: 10.1016/j.ecoenv.2021.112449] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Revised: 06/09/2021] [Accepted: 06/21/2021] [Indexed: 06/13/2023]
Abstract
Dimethoxyethyl phthalate (DMEP) is an environmental endocrine disruptor. However, research into the underlying mechanisms of DMEP mitochondrial toxicity is still in its infancy. We therefore expect to understand whether DMEP induced mitochondrial damage in HepG2 cells and the associated signaling pathways. DMEP (0.125, 0.25, 0.5, 1 and 2 mM) exposure for 48 h induced a notable increment in reactive oxygen species (ROS), malondialdehyde (MDA), alanine aminotransferase (ALT), aspartate transaminase (AST) and 8-hydroxydeoxyguanosine (8-OHdG) in hepG2 cells, resulting in cellular oxidative stress. Low doses of DMEP upregulated nuclear factor E2-related factor 2 (Nrf2) and downstream protein haeme oxygenase-1 (HO-1) levels and high doses down-regulated their levels. Nrf2 levels increased after ROS scavenging by N-acetyl-L-cysteine (NAC), which indicated that the Nrf2 pathway may be affected by oxidative stress. We also found that DMEP decreased ATP content, mitochondrial copy number (mtDNA), translocase of the outer membrane subunit 20 (TOM20) expression, mitochondria-encoded genes CO1, CO2, CO3, ATP6, ATP8 expression, inhibited mitochondrial biogenesis pathway, down-regulated sirtuin 1(SIRT1), PPAR gamma co-activator 1 alpha (PGC-1α), Nuclear respiratory factor 1(Nrf1), Mitochondrial transcription factor A (TFAM) content and activated PINK1/Parkin autophagy pathway. DMEP also activated the mitochondrial apoptotic pathway, causing cytochrome c cytoplasmic translocation and caspase 3 cleavage. What's more, DMEP activated the Nuclear factor-κB (NF-κB) pathway and levels of tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β) and interleukin-6 (IL-6) were significantly upregulated, causing an inflammatory response. In summary, DMEP can cause inflammatory response and oxidative stress in HepG2 cells, inhibited the Nrf2 pathway and mitochondrial biogenesis, and induced autophagy and apoptosis. And oxidative stress at least partially affected the Nrf2 pathway and mitochondrial biogenesis SIRT1/PGC-1α pathway.
Collapse
Affiliation(s)
- Huan Liu
- College of Food Science, South China Agricultural University, Guangzhou 510642, China; Guangdong Provincial Key Laboratory of Food Quality and Safety, Guangzhou 510642, China.
| | - Siyu Zhu
- College of Food Science, South China Agricultural University, Guangzhou 510642, China; Guangdong Provincial Key Laboratory of Food Quality and Safety, Guangzhou 510642, China.
| | - Wenna Han
- College of Food Science, South China Agricultural University, Guangzhou 510642, China; Guangdong Provincial Key Laboratory of Food Quality and Safety, Guangzhou 510642, China.
| | - Yueqi Cai
- College of Food Science, South China Agricultural University, Guangzhou 510642, China.
| | - Chunhong Liu
- College of Food Science, South China Agricultural University, Guangzhou 510642, China; Guangdong Provincial Key Laboratory of Food Quality and Safety, Guangzhou 510642, China.
| |
Collapse
|
5
|
Farrerol Enhances Nrf2-Mediated Defense Mechanisms against Hydrogen Peroxide-Induced Oxidative Damage in Human Retinal Pigment Epithelial Cells by Activating Akt and MAPK. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:8847844. [PMID: 33763175 PMCID: PMC7952154 DOI: 10.1155/2021/8847844] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 02/10/2021] [Accepted: 02/19/2021] [Indexed: 01/31/2023]
Abstract
Oxidative stress of the retinal pigment epithelium (RPE) is an essential element contributing to the progression of age-related macular degeneration (AMD). Notably, the activation of Nrf2 is regarded as an effective strategy for controlling oxidation. The novel 2,3-dihydroflavonoid compound farrerol, which is extracted from Rhododendron, possesses antioxidant properties. In this study, we investigated the mechanism by which farrerol protects against oxidative damage mediated by hydrogen peroxide (H2O2) in adult retinal pigment epithelial cell line 19 (ARPE-19) cells. Farrerol supplementation conspicuously reversed H2O2-related cell damage through declining the generation of intracellular reactive oxygen species (ROS) and MDA and increasing the concentrations of GSH and SOD. According to the results of the apoptosis assay, a farrerol pretreatment decreased the protein expression of the Bax/Bcl-2, cleaved caspase-3, PARP, caspase-8, and caspase-9 proteins. Furthermore, farrerol markedly activated Nrf2, thereby increasing the levels of antioxidant enzymes downstream of Nrf2, such as HO-1, NQO1, and GCLM. Knockdown of Nrf2 with a specific siRNA successfully suppressed farrerol-mediated HO-1 transcription and partially abolished the cytoprotective effect on ARPE-19 cells. Meanwhile, farrerol induced Akt and MAPK phosphorylation in a dose-related way. However, inhibiting Akt and MAPK substantially blocked the cytoprotective functions of farrerol. Therefore, farrerol enhanced Nrf2-mediated cytoprotection of oxidative damage caused by H2O2, which may be inseparable from the activation of Akt and MAPK.
Collapse
|
6
|
Ananth S, Miyauchi S, Thangaraju M, Jadeja RN, Bartoli M, Ganapathy V, Martin PM. Selenomethionine (Se-Met) Induces the Cystine/Glutamate Exchanger SLC7A11 in Cultured Human Retinal Pigment Epithelial (RPE) Cells: Implications for Antioxidant Therapy in Aging Retina. Antioxidants (Basel) 2020; 10:antiox10010009. [PMID: 33374239 PMCID: PMC7823377 DOI: 10.3390/antiox10010009] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 12/15/2020] [Accepted: 12/21/2020] [Indexed: 12/12/2022] Open
Abstract
Oxidative damage has been identified as a major causative factor in degenerative diseases of the retina; retinal pigment epithelial (RPE) cells are at high risk. Hence, identifying novel strategies for increasing the antioxidant capacity of RPE cells, the purpose of this study, is important. Specifically, we evaluated the influence of selenium in the form of selenomethionine (Se-Met) in cultured RPE cells on system xc- expression and functional activity and on cellular levels of glutathione, a major cellular antioxidant. ARPE-19 and mouse RPE cells were cultured with and without selenomethionine (Se-Met), the principal form of selenium in the diet. Promoter activity assay, uptake assay, RT-PCR, northern and western blots, and immunofluorescence were used to analyze the expression of xc-, Nrf2, and its target genes. Se-Met activated Nrf2 and induced the expression and function of xc- in RPE. Other target genes of Nrf2 were also induced. System xc- consists of two subunits, and Se-Met induced the subunit responsible for transport activity (SLC7A11). Selenocysteine also induced xc- but with less potency. The effect of Se-met on xc- was associated with an increase in maximal velocity and an increase in substrate affinity. Se-Met increased the cellular levels of glutathione in the control, an oxidatively stressed RPE. The Se-Met effect was selective; under identical conditions, taurine transport was not affected and Na+-coupled glutamate transport was inhibited. This study demonstrates that Se-Met enhances the antioxidant capacity of RPE by inducing the transporter xc- with a consequent increase in glutathione.
Collapse
Affiliation(s)
- Sudha Ananth
- Department of Biochemistry and Molecular Biology, Augusta University, Augusta, GA 30912, USA; (S.A.); (S.M.); (M.T.); (R.N.J.)
| | - Seiji Miyauchi
- Department of Biochemistry and Molecular Biology, Augusta University, Augusta, GA 30912, USA; (S.A.); (S.M.); (M.T.); (R.N.J.)
| | - Muthusamy Thangaraju
- Department of Biochemistry and Molecular Biology, Augusta University, Augusta, GA 30912, USA; (S.A.); (S.M.); (M.T.); (R.N.J.)
| | - Ravirajsinh N. Jadeja
- Department of Biochemistry and Molecular Biology, Augusta University, Augusta, GA 30912, USA; (S.A.); (S.M.); (M.T.); (R.N.J.)
- Culver Vision Discovery Institute, Augusta University, Augusta, GA 30912, USA;
| | - Manuela Bartoli
- Culver Vision Discovery Institute, Augusta University, Augusta, GA 30912, USA;
- Department of Ophthalmology, Augusta University, Augusta, GA 30912, USA
| | - Vadivel Ganapathy
- Department of Cell Biology and Biochemistry, Texas Tech Health Science Center, Lubbock, TX 79430, USA;
| | - Pamela M. Martin
- Department of Biochemistry and Molecular Biology, Augusta University, Augusta, GA 30912, USA; (S.A.); (S.M.); (M.T.); (R.N.J.)
- Culver Vision Discovery Institute, Augusta University, Augusta, GA 30912, USA;
- Department of Ophthalmology, Augusta University, Augusta, GA 30912, USA
- Georgia Cancer Center, Augusta University, Augusta, GA 30912, USA
- Correspondence: ; Tel.: +706-721-4220; Fax: +706-721-6608
| |
Collapse
|
7
|
Meng H, Jin W, Yu L, Xu S, Wan H, He Y. Protective effects of polysaccharides on cerebral ischemia: A mini-review of the mechanisms. Int J Biol Macromol 2020; 169:463-472. [PMID: 33347928 DOI: 10.1016/j.ijbiomac.2020.12.124] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 12/15/2020] [Accepted: 12/16/2020] [Indexed: 02/08/2023]
Abstract
Cerebral ischemia, a common cerebrovascular disease, is one of the great threats to human health. Nowadays, many drugs used in the treatment of cerebral ischemia such as clot busting drugs, antiplatelet drugs, and neuroprotective drugs have limits. It is urgent finding new effective treatments for the patients. Researches have confirmed that many kinds of polysaccharides from natural resources possess therapeutic effects on cerebral ischemia, but are still lack of a comprehensively understanding. In this paper, based on the pathophysiology of cerebral ischemic injury, we summarize the latest discoveries and advancements of 29 kinds of polysaccharides, focusing on their ameliorating effects on cerebral ischemia and the underlying mechanisms. Several mechanisms are involved, mainly including antioxidant activities, anti-inflammatory activities, regulating neuron apoptosis, as well as resisting nitrosative stress injury. Besides, polysaccharides show protective effects through certain signaling pathways including PI3K/Akt, MAPK, and NF-κB, PARP-1/AIF, JNK3/c-Jun/Fas-L, and Nrf2/HO-1 signaling pathways. The main goal of this mini-review is to emphasize the important roles of polysaccharides in attenuating cerebral ischemic injury through the elucidation of mechanisms.
Collapse
Affiliation(s)
- Huanhuan Meng
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Weifeng Jin
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Li Yu
- College of Life Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Shouchao Xu
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Haitong Wan
- College of Life Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, China.
| | - Yu He
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, China.
| |
Collapse
|
8
|
Buccarello L, Dragotto J, Iorio F, Hassanzadeh K, Corbo M, Feligioni M. The pivotal role of SUMO-1-JNK-Tau axis in an in vitro model of oxidative stress counteracted by the protective effect of curcumin. Biochem Pharmacol 2020; 178:114066. [PMID: 32502496 DOI: 10.1016/j.bcp.2020.114066] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 05/27/2020] [Accepted: 05/29/2020] [Indexed: 12/15/2022]
Abstract
Oxidative stress is a toxic cellular condition, strictly related to inflammation and known to be a common feature of many neurodegenerative diseases. The imbalanced redox state modifies several molecular processes including protein SUMOylation, JNK and Tau protein activation, important actors in Alzheimer's disease. In this study, we showed a strong interaction among SUMO-1-JNK-Tau proteins and their molecular targets in an in vitro model (SHSY5Y cell line) of oxidative stress in which a significant reduction of cell viability and an augmented cell death was induced by increased doses of H2O2. The evoked oxidative stress led to a deficiency in the degradation system showing altered levels of Caspase-3, LC3BII/I and Ubiquitin. Curcumin, a natural compound with anti-oxidant and anti-inflammatory effects, demonstrated to tackle oxidative stress re-equilibrating SUMO-1, JNK and Tau functions. Importantly, 5 μM of curcumin induced an efficient recovery of cell viability, a reduction of cell death and a normalization of altered protein degradation marker levels. Interestingly, we found that H2O2 treatment induced a strong co-localization of SUMO-1-p-JNK-Tau proteins in nuclear bodies (NBs) and that curcumin was able to reduce these nuclear aggregates. These results highlight the SUMO-1-JNK-Tau axis key role in oxidative stress and the protective effect of curcumin against this pathological event, focusing on the importance of SUMO/deSUMOylation balance to regulate essential cellular processes.
Collapse
Affiliation(s)
- Lucia Buccarello
- Laboratory of Neuropharmacology, EBRI Rita Levi-Montalcini Foundation, Rome, Italy
| | - Jessica Dragotto
- Laboratory of Neuropharmacology, EBRI Rita Levi-Montalcini Foundation, Rome, Italy
| | - Federico Iorio
- Laboratory of Neuropharmacology, EBRI Rita Levi-Montalcini Foundation, Rome, Italy
| | - Kambiz Hassanzadeh
- Laboratory of Neuropharmacology, EBRI Rita Levi-Montalcini Foundation, Rome, Italy; Cellular and Molecular Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Massimo Corbo
- Department of Neurorehabilitation Sciences, Casa Cura Policlinico, Milan, Italy
| | - Marco Feligioni
- Laboratory of Neuropharmacology, EBRI Rita Levi-Montalcini Foundation, Rome, Italy; Department of Neurorehabilitation Sciences, Casa Cura Policlinico, Milan, Italy.
| |
Collapse
|
9
|
Cui Y, Li Y, Huang N, Xiong Y, Cao R, Meng L, Liu J, Feng Z. Structure based modification of chalcone analogue activates Nrf2 in the human retinal pigment epithelial cell line ARPE-19. Free Radic Biol Med 2020; 148:52-59. [PMID: 31887452 DOI: 10.1016/j.freeradbiomed.2019.12.033] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 12/19/2019] [Accepted: 12/23/2019] [Indexed: 12/27/2022]
Abstract
Oxidative stress-induced degeneration of retinal pigment epithelial (RPE) cells is known to be a key contributor to the development of age-related macular degeneration (AMD). Activation of the nuclear factor-(erythroid-derived 2)-related factor-2 (Nrf2)-mediated cellular defense system is believed to be a valid therapeutic approach. In the present study, we designed and synthesized a novel chalcone analogue, 1-(2,3,4-trimethoxyphenyl)-2-(3,4,5-trimethoxyphenyl)-acrylketone (Tak), as a Nrf2 activator. The potency of Tak was measured in RPE cells by the induction of the Nrf2-dependent antioxidant genes HO-1, NQO-1, GCLc, and GCLm, which were regulated through the Erk pathway. We also showed that Tak could protect RPE cells against oxidative stress-induced cell death and mitochondrial dysfunction. Furthermore, by modifying the α, β unsaturated carbonyl entity in Tak, we showed that the induction of antioxidant genes was abolished, indicating that this unique feature in Tak was responsible for the Nrf2 activation. These results suggest that Tak is a potential candidate for clinical application against AMD.
Collapse
Affiliation(s)
- Yuting Cui
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Yuan Li
- Institute of Basic Medical Science, Xi'an Medical University, Xi'an, 710021, PR China
| | - Na Huang
- School of Science, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Yue Xiong
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Ruijun Cao
- School of Science, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Lingjie Meng
- School of Science, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Jiankang Liu
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China; Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China.
| | - Zhihui Feng
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China; Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China.
| |
Collapse
|
10
|
Morris G, Puri BK, Walker AJ, Berk M, Walder K, Bortolasci CC, Marx W, Carvalho AF, Maes M. The compensatory antioxidant response system with a focus on neuroprogressive disorders. Prog Neuropsychopharmacol Biol Psychiatry 2019; 95:109708. [PMID: 31351160 DOI: 10.1016/j.pnpbp.2019.109708] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 07/16/2019] [Accepted: 07/22/2019] [Indexed: 02/07/2023]
Abstract
Major antioxidant responses to increased levels of inflammatory, oxidative and nitrosative stress (ONS) are detailed. In response to increasing levels of nitric oxide, S-nitrosylation of cysteine thiol groups leads to post-transcriptional modification of many cellular proteins and thereby regulates their activity and allows cellular adaptation to increased levels of ONS. S-nitrosylation inhibits the function of nuclear factor kappa-light-chain-enhancer of activated B cells, toll-like receptor-mediated signalling and the activity of several mitogen-activated protein kinases, while activating nuclear translocation of nuclear factor (erythroid-derived 2)-like 2 (Nrf2 or NFE2L2); in turn, the redox-regulated activation of Nrf2 leads to increased levels and/or activity of key enzymes and transporter systems involved in the glutathione system. The Nrf2/Kelch-like ECH-associated protein-1 axis is associated with upregulation of NAD(P)H:quinone oxidoreductase 1, which in turn has anti-inflammatory effects. Increased Nrf2 transcriptional activity also leads to activation of haem oxygenase-1, which is associated with upregulation of bilirubin, biliverdin and biliverdin reductase as well as increased carbon monoxide signalling, anti-inflammatory and antioxidant activity. Associated transcriptional responses, which may be mediated by retrograde signalling owing to elevated hydrogen peroxide, include the unfolded protein response (UPR), mitohormesis and the mitochondrial UPR; the UPR also results from increasing levels of mitochondrial and cytosolic reactive oxygen species and reactive nitrogen species leading to nitrosylation, glutathionylation, oxidation and nitration of crucial cysteine and tyrosine causing protein misfolding and the development of endoplasmic reticulum stress. It is shown how these mechanisms co-operate in forming a co-ordinated rapid and prolonged compensatory antioxidant response system.
Collapse
Affiliation(s)
- Gerwyn Morris
- IMPACT Strategic Research Centre, Barwon Health, School of Medicine, Deakin University, Geelong, VIC, Australia
| | - Basant K Puri
- Department of Medicine, Hammersmith Hospital, Imperial College London, London, United Kingdom
| | - Adam J Walker
- IMPACT Strategic Research Centre, Barwon Health, School of Medicine, Deakin University, Geelong, VIC, Australia
| | - Michael Berk
- IMPACT Strategic Research Centre, Barwon Health, School of Medicine, Deakin University, Geelong, VIC, Australia; Orygen, The National Centre of Excellence in Youth Mental Health, The Department of Psychiatry, The Florey Institute for Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - Ken Walder
- CMMR Strategic Research Centre, School of Medicine, Deakin University, Geelong, VIC, Australia
| | - Chiara C Bortolasci
- CMMR Strategic Research Centre, School of Medicine, Deakin University, Geelong, VIC, Australia
| | - Wolfgang Marx
- IMPACT Strategic Research Centre, Barwon Health, School of Medicine, Deakin University, Geelong, VIC, Australia
| | - Andre F Carvalho
- Department of Psychiatry, University of Toronto, Toronto, ON, Canada; Centre for Addiction and Mental Health (CAMH), Toronto, ON, Canada.
| | - Michael Maes
- IMPACT Strategic Research Centre, Barwon Health, School of Medicine, Deakin University, Geelong, VIC, Australia
| |
Collapse
|
11
|
Shivarudrappa AH, Ponesakki G. Lutein reverses hyperglycemia-mediated blockage of Nrf2 translocation by modulating the activation of intracellular protein kinases in retinal pigment epithelial (ARPE-19) cells. J Cell Commun Signal 2019; 14:207-221. [PMID: 31820335 DOI: 10.1007/s12079-019-00539-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 11/21/2019] [Indexed: 01/15/2023] Open
Abstract
Diabetic retinopathy (DR) is a major cause of acquired blindness among working adults. The retinal pigment epithelium (RPE), constitutes an outer blood-retinal barrier, is vastly affected in diabetic humans and animals. Lower levels of lutein in the serum and retina of diabetic population, and beneficial effects of carotenoids supplementation in diabetic retinopathy patients created an interest to examine the protective effect of lutein on hyperglycemia-mediated changes in oxidative stress and antioxidant defense system in ARPE-19 cells. The WST-1 assay was performed to analyze the impact of glucose, and lutein on the viability of ARPE-19. The intracellular oxidative stress was measured by a DCF (dichlorofluorescein) assay, mitochondrial membrane potential (MMP) was monitored using a JC-10 MMP assay kit and GSH level was examined using GSH/GSSG ratio detection kit. The oxidative stress markers, protein carbonyl and malondialdehyde were spectrophotometrically measured using 2,4-dinitrophenylhydrazine and 2-thiobarbituric acid, respectively. The expression of endogenous antioxidant enzymes and regulatory proteins in ARPE-19 was quantified by western blotting. The localization of Nrf2 protein was examined by immunofluorescent staining. The results show that lutein (up to 1.0 μM) did not affect the viability of ARPE-19 grown in both normal and high-glucose conditions. Lutein treatment blocked high glucose-mediated elevation of intracellular ROS, protein carbonyl and malondialdehyde content in ARPE-19 cells. The decreased MMP and GSH levels observed in ARPE-19 grown under high-glucose condition were rescued by lutein treatment. Further, lutein protected high glucose-mediated down-regulation of a redox-sensitive transcription factor, Nrf2, and antioxidant enzymes, SOD2, HO-1, and catalase. This protective effect of lutein was linked with activated nuclear translocation of Nrf2, which was associated with increased activation of regulatory proteins such as Erk and AKT. Our study indicates that improving the concentration of lutein in the retina could protect RPE from diabetes-associated damage.
Collapse
Affiliation(s)
- Arpitha Haranahalli Shivarudrappa
- Department of Molecular Nutrition, CSIR-Central Food Technological Research Institute (CFTRI), Mysore, Karnataka, 570 020, India
- Academy of Scientific and Innovative Research (AcSIR), Gazhiabad, 201 002, India
| | - Ganesan Ponesakki
- Department of Molecular Nutrition, CSIR-Central Food Technological Research Institute (CFTRI), Mysore, Karnataka, 570 020, India.
- Academy of Scientific and Innovative Research (AcSIR), Gazhiabad, 201 002, India.
- Department of Biochemistry and Biotechnology, CSIR-Central Leather Resaerch Institute (CLRI), Adyar, Chennai, 600 020, India.
| |
Collapse
|
12
|
Shen L, Yang Q, He Y, Zou X, Cao Z. BmK NT1-induced neurotoxicity is mediated by PKC/CaMKⅡ-dependent ERK1/2 and p38 activation in primary cultured cerebellar granule cells. Toxicology 2019; 421:22-29. [PMID: 30940546 DOI: 10.1016/j.tox.2019.03.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 03/01/2019] [Accepted: 03/28/2019] [Indexed: 01/08/2023]
Abstract
Voltage-gated sodium channels (VGSCs) represent molecular targets for a number of potent neurotoxins that affect the ion permeation or gating kinetics. BmK NT1, an α-scorpion toxin purified from Buthus martensii Karch (BMK), induces excitatory neurotoxicity by activation of VGSCs with subsequent overloading of intracellular Ca2+ in cerebellar granule cells (CGCs). In the current study, we further investigated signaling pathways responsible for BmK NT1-induced neurotoxicity in CGCs. BmK NT1 exposure induced neuronal death in different development stages of CGCs with similar potencies ranging from 0.21-0.48 μM. The maximal neuronal death induced by BmK NT1 gradually increased from 25.6% at 7 days in vitro (DIVs) to 42.1%, 47.8%, and 67.2% at 10, 13, and 16 DIVs, respectively, suggesting that mature CGCs are more vulnerable to BmK NT1 exposure. Application of Ca2+/calmodulin-dependent protein kinase Ⅱ (CaMKⅡ) inhibitors, KN-62 or KN-93, but not Ca2+/calmodulin-dependent protein kinase kinase (CaMKK) inhibitor, STO-609, completely abolished BmK NT1-induced neuronal death. Moreover, BmK NT1 exposure stimulated CaMKⅡ phosphorylation. BmK NT1 also stimulated extracellular regulated protein kinases 1/2 (ERK1/2) and p38 phosphorylation which was abolished by tetrodotoxin demonstrating the role of VGSCs on BmK NT1-induced ERK1/2 and p38 phosphorylation. However, BmK NT1 didn't affect c-Jun N-terminal kinase (JNK) phosphorylation. In addition, both ERK1/2 inhibitor, U0126 and p38 inhibitor, SB203580 attenuated BmK NT1-induced neuronal death. Both PKC inhibitor, Gö 6983 and CaMKⅡ inhibitor, KN-62 abolished BmK NT1-induced ERK1/2 and p38 phosphorylation. Considered together, these data demonstrate that BmK NT1-induced neurotoxicity is through PKC/CaMKⅡ mediated ERK1/2 and p38 activation.
Collapse
Affiliation(s)
- Liping Shen
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 211198, China
| | - Qundi Yang
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 211198, China
| | - Yuwei He
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 211198, China
| | - Xiaohan Zou
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 211198, China.
| | - Zhengyu Cao
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of TCM Evaluation and Translational Research, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 211198, China.
| |
Collapse
|
13
|
Rysenkova KD, Semina EV, Karagyaur MN, Shmakova AA, Dyikanov DT, Vasiluev PA, Rubtsov YP, Rubina KA, Tkachuk VA. CRISPR/Cas9 nickase mediated targeting of urokinase receptor gene inhibits neuroblastoma cell proliferation. Oncotarget 2018; 9:29414-29430. [PMID: 30034627 PMCID: PMC6047682 DOI: 10.18632/oncotarget.25647] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 06/05/2018] [Indexed: 12/26/2022] Open
Abstract
Neuroblastoma is a tumor arising from pluripotent sympathoadrenal precursor cells of neural cell origin. Neuroblastoma is one of the most aggressive childhood tumors with highly invasive and metastatic potential. The increased expression of urokinase and its receptor is often associated with a negative prognosis in neuroblastoma patients. We have shown that targeting of the Plaur gene in mouse neuroblastoma Neuro 2A cells by CRISPR/Cas9n results in ~60% decrease in cell proliferation (p<0.05), reduction in the number of Ki-67 positive cells, caspase 3 activation and PARP-1 cleavage. Knockout of uPAR leads to downregulation of mRNA encoding full-length TrkC receptor, which is involved in p38MAPK and Akt signalling pathways. This finding provides a rationale to study a role of uPAR in neuroblastoma progression, since uPAR could be considered a potential therapeutic target in neuroblastoma treatment.
Collapse
Affiliation(s)
- Karina D Rysenkova
- Lomonosov Moscow State University, Faculty of Medicine, Laboratory of Gene and Cell Technologies, 119991, Moscow, Russian Federation
| | - Ekaterina V Semina
- Lomonosov Moscow State University, Faculty of Medicine, Laboratory of Gene and Cell Technologies, 119991, Moscow, Russian Federation.,Federal State Budgetary Organization National Cardiology Research Center Ministry of Health of the Russian Federation, Institute of Experimental Cardiology, 121552, Moscow, Russian Federation
| | - Maxim N Karagyaur
- Institute of Regenerative Medicine, Lomonosov Moscow State University, 119991, Moscow, Russian Federation
| | - Anna A Shmakova
- Lomonosov Moscow State University, Faculty of Medicine, Laboratory of Gene and Cell Technologies, 119991, Moscow, Russian Federation
| | - Daniyar T Dyikanov
- Lomonosov Moscow State University, Faculty of Medicine, Laboratory of Gene and Cell Technologies, 119991, Moscow, Russian Federation
| | - Petr A Vasiluev
- Lomonosov Moscow State University, Faculty of Medicine, Laboratory of Gene and Cell Technologies, 119991, Moscow, Russian Federation
| | - Yury P Rubtsov
- Lomonosov Moscow State University, Faculty of Medicine, Laboratory of Gene and Cell Technologies, 119991, Moscow, Russian Federation.,Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, 117997, Moscow, Russian Federation
| | - Kseniya A Rubina
- Lomonosov Moscow State University, Faculty of Medicine, Laboratory of Gene and Cell Technologies, 119991, Moscow, Russian Federation
| | - Vsevolod A Tkachuk
- Lomonosov Moscow State University, Faculty of Medicine, Laboratory of Gene and Cell Technologies, 119991, Moscow, Russian Federation.,Federal State Budgetary Organization National Cardiology Research Center Ministry of Health of the Russian Federation, Institute of Experimental Cardiology, 121552, Moscow, Russian Federation
| |
Collapse
|
14
|
Wen ZS, Ma L, Xiang XW, Tang Z, Guan RF, Qu YL. Protective effect of low molecular-weight seleno-aminopolysaccharides against H2O2-induecd oxidative stress in intestinal epithelial cells. Int J Biol Macromol 2018; 112:745-753. [DOI: 10.1016/j.ijbiomac.2018.01.191] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 01/27/2018] [Accepted: 01/29/2018] [Indexed: 01/02/2023]
|
15
|
Cai G, Yan A, Fu N, Fu Y. Thromboxane A2 receptor antagonist SQ29548 attenuates SH‑SY5Y neuroblastoma cell impairments induced by oxidative stress. Int J Mol Med 2018; 42:479-488. [PMID: 29620149 DOI: 10.3892/ijmm.2018.3589] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 03/21/2018] [Indexed: 11/05/2022] Open
Abstract
Thromboxane A2 receptor (TXA2R) serves a vital role in numerous neurological disorders. Our previous study indicated that SQ29548, an antagonist of TXA2R, attenuated the induced neuron damage in cerebral infarction animals; however, the underlying mechanism remains unknown. Certain studies revealed a new role of TXA2R in the regulation of oxidative stress, which is one of the basic pathological processes in neurological disorders. Thus, the present study attempted to examine whether the inhibition of TXA2R with SQ29548 helped to protect the nerve cells against oxidative stress. SQ29548 was utilized as a TXA2R antagonist, and relevant assays were performed to detect the cell viability, cellular reactive oxygen species (ROS) level, cell apoptosis, expression levels of superoxide dismutase‑2 (SOD2), catalase and caspases, and activation of mitogen‑activated protein kinase (MAPK) pathways. It was observed that hydrogen peroxide (H2O2) dose‑dependently reduced the viability of SH‑SY5Y cells. In addition, H2O2 raised the level of ROS in cells, inhibited the expression levels of SOD2 and catalase, and potentially enhanced cell apoptosis and the expression of caspases via activating the MAPK pathways. Pretreatment with SQ29548 not only rescued the viability of SH‑SY5Y cells, but also ameliorated the intracellular ROS level and the expression levels of SOD2 and catalase. Furthermore, it decreased the cell apoptosis and the expression of caspases, possibly via the inhibition of MAPK pathways. In conclusion, SQ29548, an antagonist of TXA2R, improved the antioxidant capacities of SH‑SY5Y cells and reduced the cell apoptosis through the inhibition of MAPK pathways.
Collapse
Affiliation(s)
- Gaoyu Cai
- Department of Neurology, Rui Jin Hospital, Shanghai Jiao Tong University, Shanghai 200025, P.R. China
| | - Aijuan Yan
- Department of Neurology, Xin Hua Hospital, Shanghai Jiao Tong University, Shanghai 200082, P.R. China
| | - Ningzhen Fu
- Department of Pancreatic Surgery, Rui Jin College of Clinical Medicine, Rui Jin Hospital, Shanghai Jiao Tong University, Shanghai 200025, P.R. China
| | - Yi Fu
- Department of Neurology, Rui Jin Hospital, Shanghai Jiao Tong University, Shanghai 200025, P.R. China
| |
Collapse
|
16
|
Xiong W, Li J, Jiang R, Li D, Liu Z, Chen D. Research on the effect of ginseng polysaccharide on apoptosis and cell cycle of human leukemia cell line K562 and its molecular mechanisms. Exp Ther Med 2017; 13:924-934. [PMID: 28450921 PMCID: PMC5403339 DOI: 10.3892/etm.2017.4087] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 10/11/2016] [Indexed: 01/19/2023] Open
Abstract
Ginseng polysaccharide (GPS), a polymer of glucose and the primary constituent extracted from panax ginseng, has been documented to exert various pharmacological properties, including anti-tumor properties. To provide further insights into the anti-tumor functions of GPS, the present study was designed to investigate the effect of GPS on apoptosis and the cell cycle of human leukemia cell line K562 cells, and its underlying mechanisms. The results demonstrated that GPS could inhibit K562 cell proliferation and induce apoptosis in vitro in a concentration- and time-dependent manner. The transcription of P38 and c-Jun NH2-terminal kinase (JNK) mRNA were significantly augmented, while the transcription of extracellular signal-regulated kinase (ERK) mRNA were significantly reduced following treatment with GPS compared with the control group (all P<0.05). In addition, GPS treatment markedly suppressed the expression of phosphorylated (p)-ERK, nuclear factor (NF)-κB p65 and cyclin D1, and increased the synthesis of p-P38 and p-JNK protein expression, as evidenced by immunofluorescence and western blotting analyses. In conclusion, the results indicate that the GPS-mediated MAPK/NF-κB/cyclin D1 signaling pathway serves a crucial role in cell cycle arrest and apoptosis of K562 cells.
Collapse
Affiliation(s)
- Wei Xiong
- Faculty of Basic Medical Sciences, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Jing Li
- Faculty of Basic Medical Sciences, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Rong Jiang
- Faculty of Basic Medical Sciences, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Danyang Li
- Faculty of Basic Medical Sciences, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Zehong Liu
- Faculty of Basic Medical Sciences, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Dilong Chen
- Faculty of Basic Medical Sciences, Chongqing Medical University, Chongqing 400016, P.R. China
| |
Collapse
|
17
|
Upregulation of NRF2 through autophagy/ERK 1/2 ameliorates ionizing radiation induced cell death of human osteosarcoma U-2 OS. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2016; 813:10-17. [PMID: 28010924 DOI: 10.1016/j.mrgentox.2016.11.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 11/15/2016] [Accepted: 11/21/2016] [Indexed: 01/14/2023]
Abstract
The antioxidative response mediated by transcription factor NRF2 is thought to be a pivotal cellular defense system against various extrinsic stresses. It has been reported that activation of the NRF2 pathway confers cells with resistance to ionizing radiation-induced damage. However, the underlying mechanism remains largely unknown. In the current research, it was found that α-particle radiation has the ability to stimulate NRF2 expression in human osteosarcoma U-2 OS cells. Knockdown of cellular NRF2 level by shRNA-mediated gene silencing decreased the survival rate, increased the micronucleus formation rate and apoptosis rate in irradiated cells. Consistently, knockdown of NRF2 resulted in decreased expression of p65 and Bcl-2, and increased expression of p53 and Bax. Besides, it was observed that increased expression of NRF2 was partially dependent on radiation induced phosphorylation of ERK 1/2. Further results showed that radiation promoted autophagy flux which leads to the enhanced phosphorylation of ERK 1/2, as evidenced by the resultls that knockdown of ATG5 (Autophagy protein 5) gene by shRNA suppressed both radiation induced ERK 1/2 phosphorylation and NRF2 upregulation. Based on these results, it is proposed that attenuation of NRF2 antioxidative pathway can sensitize U-2 OS cells to radiation, where NRF2 antioxidative response is regulated by autophagy mediated activation of ERK 1/2 kinases.
Collapse
|
18
|
Mitochondrion-Mediated Apoptosis Induced by Acrylamide is Regulated by a Balance Between Nrf2 Antioxidant and MAPK Signaling Pathways in PC12 Cells. Mol Neurobiol 2016; 54:4781-4794. [DOI: 10.1007/s12035-016-0021-1] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Accepted: 08/01/2016] [Indexed: 12/14/2022]
|
19
|
Xiang Q, Yu C, Zhu YF, Li CY, Tian RB, Li XH. Nuclear factor erythroid 2-related factor 2 antibody attenuates thermal hyperalgesia in the dorsal root ganglion: Neurochemical changes and behavioral studies after sciatic nerve-pinch injury. Injury 2016; 47:1647-54. [PMID: 27316447 DOI: 10.1016/j.injury.2016.06.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 05/30/2016] [Accepted: 06/02/2016] [Indexed: 02/02/2023]
Abstract
Oxidative stress is generated in several peripheral nerve injury models.Nuclear factor erythroid 2-related factor 2 (Nrf2) is activated to have a role in antioxidant effect. After nerve injury, the severely painful behavior is also performed. However, little has been explored regarding the function of Nrf2 in this painful process. Therefore, in this study, we compared the effects of Nrf2 antibody administration following sciatic nerve-pinch injury on painful behavior induced in young mice and neurochemical changes in dorsal root ganglion neurons. After pinch nerve injury, we found that the magnitude of the thermal allodynia was significantly decreased after application of Nrf2 antibody (5ul, 1mg/ml) in such injured animals and phosphorylated ERK(p-ERK) as well as the apoptotic protein (i.e., Bcl-6) in DRG neurons were also down-regulated in the anti-Nrf2-treated injured groups compared to the saline-treated groups. Taken collectively, these data suggested that the Nrf2 antibody reduced thermal hyperalgesia via ERK pathway and the down regulation of Bcl-6 protein from the apoptosis pathway might be protecting against the protein deletions caused by anti-Nrf2 effect and suggested the new therapeutic strategy with Nrf2 inhibitor following nerve injury.
Collapse
Affiliation(s)
- Qiong Xiang
- Institute of Medicine, Medical Research Center, Jishou University, Hunan, 416000, China
| | - Chao Yu
- Institute of Medicine, Medical Research Center, Jishou University, Hunan, 416000, China
| | - Yao-Feng Zhu
- Institute of Medicine, Medical Research Center, Jishou University, Hunan, 416000, China
| | - Chun-Yan Li
- Institute of Medicine, Medical Research Center, Jishou University, Hunan, 416000, China
| | - Rong-Bo Tian
- Institute of Medicine, Medical Research Center, Jishou University, Hunan, 416000, China
| | - Xian-Hui Li
- Institute of Medicine, Medical Research Center, Jishou University, Hunan, 416000, China.
| |
Collapse
|
20
|
Pan Z, Niu Y, Liang Y, Zhang X, Dong M. β-Ecdysterone Protects SH-SY5Y Cells Against 6-Hydroxydopamine-Induced Apoptosis via Mitochondria-Dependent Mechanism: Involvement of p38(MAPK)-p53 Signaling Pathway. Neurotox Res 2016; 30:453-66. [PMID: 27229883 DOI: 10.1007/s12640-016-9631-7] [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: 02/26/2016] [Revised: 04/24/2016] [Accepted: 05/17/2016] [Indexed: 11/28/2022]
Abstract
Parkinson's disease (PD) is a neurological disorder pathologically characterized by loss of dopaminergic neurons in the substantia nigra. No curative therapy is available for PD. We recently found that phytoestrogen β-ecdysterone (β-Ecd) is able to reduce MPP(+)-induced apoptosis in PC12 cells. This study investigated the potential of β-Ecd to protect against SH-SY5Y cell apoptosis induced by the PD-related neurotoxin 6-hydroxydopamine (6-OHDA) and the underlying mechanism for this cytoprotection. In the present study, pretreatment with β-Ecd significantly reduced 6-OHDA-induced apoptosis of SH-SY5Y cells by a mitochondria-dependent pathway, as indicated by downregulation of Bax and PUMA (p53 upregulated modulator of apoptosis) expression, suppressing ΔΨm loss, inhibiting cytochrome c release, and attenuating caspase-9 activation. Furthermore, we showed that the inhibition of p38 mitogen-activated protein kinase (p38(MAPK))-dependent p53 promoter activity contributed to the protection of SH-SY5Y cells from apoptosis, which was validated by the use of SB203580 or p38β dominant negative (DN) mutants. Additionally, knock-down apoptosis signal-regulating kinase 1 (ASK1) by specific shRNA and blockade reactive oxygen species (ROS) by pharmacological inhibitor competently prevented β-Ecd-mediated inhibition of p38(MAPK) and ASK1 phosphorylation, respectively. These data provide the first evidence that β-Ecd protects SH-SY5Y cells against 6-OHDA-induced apoptosis, possibly through mitochondria protection and p53 modulation via ROS-dependent ASK1-p38(MAPK) pathways. The neuroprotective effects of β-Ecd make it a promising candidate as a therapeutic agent for PD.
Collapse
Affiliation(s)
- Zhi Pan
- Center for New Medicine Research, Changchun University of Chinese Medicine, Changchun, 130117, China
| | - Yingcai Niu
- The Institute of Medicine, Qiqihar Medical University, 333 BuKui Street, Jianhua District, Qiqihar, 161006, China
| | - Yini Liang
- The Institute of Medicine, Qiqihar Medical University, 333 BuKui Street, Jianhua District, Qiqihar, 161006, China
| | - Xiaojie Zhang
- The Institute of Medicine, Qiqihar Medical University, 333 BuKui Street, Jianhua District, Qiqihar, 161006, China
| | - Miaoxian Dong
- The Institute of Medicine, Qiqihar Medical University, 333 BuKui Street, Jianhua District, Qiqihar, 161006, China.
| |
Collapse
|
21
|
Rajagopal S, Deb I, Poddar R, Paul S. Aging is associated with dimerization and inactivation of the brain-enriched tyrosine phosphatase STEP. Neurobiol Aging 2016; 41:25-38. [PMID: 27103516 DOI: 10.1016/j.neurobiolaging.2016.02.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 12/21/2015] [Accepted: 02/04/2016] [Indexed: 10/22/2022]
Abstract
The STriatal-Enriched tyrosine Phosphatase (STEP) is involved in the etiology of several age-associated neurologic disorders linked to oxidative stress and is also known to play a role in neuroprotection by modulating glutamatergic transmission. However, the possible effect of aging on STEP level and activity in the brain is still unclear. In this study, using young (1 month), adult (4 months), and aged (18 months) rats, we show that aging is associated with increase in dimerization and loss of activity of STEP. Increased dimerization of STEP is primarily observed in the cortex and hippocampus and is associated with depletion of both reduced and total glutathione levels, suggesting an increase in oxidative stress. Consistent with this interpretation, studies in cell culture models of glutathione depletion and oxidative stress also demonstrate formation of dimers and higher order oligomers of STEP that involve intermolecular disulfide bond formation between multiple cysteine residues. Conversely, administration of N-acetyl cysteine, a major antioxidant that enhances glutathione biosynthesis, attenuates STEP dimerization both in the cortex and hippocampus. The findings indicate that loss of this intrinsic protective response pathway with age-dependent increase in oxidative stress may be a contributing factor for the susceptibility of the brain to age-associated neurologic disorders.
Collapse
Affiliation(s)
| | - Ishani Deb
- Department of Neurology, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Ranjana Poddar
- Department of Neurology, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Surojit Paul
- Department of Neurology, University of New Mexico Health Sciences Center, Albuquerque, NM, USA; Department of Neurosciences, University of New Mexico Health Sciences Center, Albuquerque, NM, USA.
| |
Collapse
|
22
|
Tian H, Gao Z, Wang G, Li H, Zheng J. Estrogen potentiates reactive oxygen species (ROS) tolerance to initiate carcinogenesis and promote cancer malignant transformation. Tumour Biol 2015; 37:141-50. [DOI: 10.1007/s13277-015-4370-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 11/03/2015] [Indexed: 12/25/2022] Open
|
23
|
NRF2 Mediates Neuroblastoma Proliferation and Resistance to Retinoic Acid Cytotoxicity in a Model of In Vitro Neuronal Differentiation. Mol Neurobiol 2015; 53:6124-6135. [PMID: 26541884 DOI: 10.1007/s12035-015-9506-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Accepted: 10/20/2015] [Indexed: 12/12/2022]
Abstract
Retinoic acid (RA) morphogenetic properties have been used in different kinds of therapies, from neurodegenerative disorders to some types of cancer such as promyelocytic leukemia and neuroblastoma. However, most of the pathways responsible for RA effects remain unknown. To investigate such pathways, we used a RA-induced differentiation model in the human neuroblastoma cells, SH-SY5Y. Our data showed that n-acetyl-cysteine (NAC) reduced cells' proliferation rate and increased cells' sensitivity to RA toxicity. Simultaneously, NAC pre-incubation attenuated nuclear factor erythroid 2-like factor 2 (NRF2) activation by RA. None of these effects were obtained with Trolox® as antioxidant, suggesting a cysteine signalization by RA. NRF2 knockdown increased cell sensibility to RA after 96 h of treatment and diminished neuroblastoma proliferation rate. Conversely, NRF2 overexpression limited RA anti-proliferative effects and increased cell proliferation. In addition, a rapid and non-genomic activation of the ERK 1/2 and PI3K/AKT pathways revealed to be equally required to promote NRF2 activation and necessary for RA-induced differentiation. Together, we provide data correlating NRF2 activity with neuroblastoma proliferation and resistance to RA treatments; thus, this pathway could be a potential target to optimize neuroblastoma chemotherapeutic response as well as in vitro neuronal differentiation protocols.
Collapse
|
24
|
Kalinina EV, Chernov NN, Novichkova MD. Role of glutathione, glutathione transferase, and glutaredoxin in regulation of redox-dependent processes. BIOCHEMISTRY (MOSCOW) 2015; 79:1562-83. [PMID: 25749165 DOI: 10.1134/s0006297914130082] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Over the last decade fundamentally new features have been revealed for the participation of glutathione and glutathione-dependent enzymes (glutathione transferase and glutaredoxin) in cell proliferation, apoptosis, protein folding, and cell signaling. Reduced glutathione (GSH) plays an important role in maintaining cellular redox status by participating in thiol-disulfide exchange, which regulates a number of cell functions including gene expression and the activity of individual enzymes and enzyme systems. Maintaining optimum GSH/GSSG ratio is essential to cell viability. Decrease in the ratio can serve as an indicator of damage to the cell redox status and of changes in redox-dependent gene regulation. Disturbance of intracellular GSH balance is observed in a number of pathologies including cancer. Consequences of inappropriate GSH/GSSG ratio include significant changes in the mechanism of cellular redox-dependent signaling controlled both nonenzymatically and enzymatically with the participation of isoforms of glutathione transferase and glutaredoxin. This review summarizes recent data on the role of glutathione, glutathione transferase, and glutaredoxin in the regulation of cellular redox-dependent processes.
Collapse
Affiliation(s)
- E V Kalinina
- Peoples' Friendship University of Russia, Moscow, 117198, Russia.
| | | | | |
Collapse
|
25
|
Brown RH, Reynolds C, Brooker A, Talalay P, Fahey JW. Sulforaphane improves the bronchoprotective response in asthmatics through Nrf2-mediated gene pathways. Respir Res 2015; 16:106. [PMID: 26369337 PMCID: PMC4570035 DOI: 10.1186/s12931-015-0253-z] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 07/21/2015] [Indexed: 01/16/2023] Open
Abstract
Background It is widely recognized that deep inspiration (DI), either before methacholine (MCh) challenge (Bronchoprotection, BP) or after MCh challenge (Bronchodilation, BD) protects against this challenge in healthy individuals, but not in asthmatics. Sulforaphane, a dietary antioxidant and antiinflammatory phytochemical derived from broccoli, may affect the pulmonary bronchoconstrictor responses to MCh and the responses to DI in asthmatic patients. Methods Forty-five moderate asthmatics were administered sulforaphane (100 μmol daily for 14 days), BP, BD, lung volumes by body-plethsmography, and airway morphology by computed tomography (CT) were measured pre- and post sulforaphane consumption. Results Sulforaphane ameliorated the bronchoconstrictor effects of MCh on FEV1 significantly (on average by 21 %; p = 0.01) in 60 % of these asthmatics. Interestingly, in 20 % of the asthmatics, sulforaphane aggravated the bronchoconstrictor effects of MCh and in a similar number was without effect, documenting the great heterogeneity of the responsiveness of these individuals to sulforaphane. Moreover, in individuals in whom the FEV1 response to MCh challenge decreased after sulforaphane administration, i.e., sulforaphane was protective, the activities of Nrf2-regulated antioxidant and anti-inflammatory genes decreased. In contrast, individuals in whom sulforaphane treatment enhanced the FEV1 response to MCh, had increased expression of the activities of these genes. High resolution CT scans disclosed that in asthmatics sulforaphane treatment resulted in a significant reduction in specific airway resistance and also increased small airway luminal area and airway trapping modestly but significantly. Conclusion These findings suggest the potential value of blocking the bronchoconstrictor hyperresponsiveness in some types of asthmatics by phytochemicals such as sulforaphane.
Collapse
Affiliation(s)
- Robert H Brown
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA. .,Division of Pulmonary Medicine and Critical Care, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA. .,Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA. .,Department of Environmental Health Sciences, Johns Hopkins University School of Public Health, Room E7614, 615 N. Wolfe Street, Baltimore, MD, 21205, USA.
| | - Curt Reynolds
- Department of Environmental Health Sciences, Johns Hopkins University School of Public Health, Room E7614, 615 N. Wolfe Street, Baltimore, MD, 21205, USA
| | - Allison Brooker
- Department of Environmental Health Sciences, Johns Hopkins University School of Public Health, Room E7614, 615 N. Wolfe Street, Baltimore, MD, 21205, USA
| | - Paul Talalay
- Lewis B. and Dorothy Cullman Chemoprotection Center, Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Center for Human Nutrition, Department of International Health, Johns Hopkins University School of Public Health, Baltimore, MD, USA
| | - Jed W Fahey
- Lewis B. and Dorothy Cullman Chemoprotection Center, Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Center for Human Nutrition, Department of International Health, Johns Hopkins University School of Public Health, Baltimore, MD, USA
| |
Collapse
|
26
|
Cheng L, Li F, Ma R, Hu X. Forsythiaside inhibits cigarette smoke-induced lung inflammation by activation of Nrf2 and inhibition of NF-κB. Int Immunopharmacol 2015; 28:494-9. [PMID: 26209933 DOI: 10.1016/j.intimp.2015.07.011] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 06/28/2015] [Accepted: 07/10/2015] [Indexed: 12/13/2022]
Abstract
Cigarette smoke has been reported to be the major cause of chronic obstructive pulmonary disease (COPD). It causes persistent inflammation by regulating the redox-sensitive pathways. Forsythiaside, an active constituent isolated from the Chinese medicinal herb Forsythia suspensa, has been reported to have anti-inflammatory and anti-oxidant effects. Thus, in this study, we investigated the protective effects of forsythiaside against cigarette smoke-induced lung inflammation in mice. COPD mice model was established by cigarette smoke. Forsythiaside was given 2h before cigarette smoke exposure for five consecutive days. Bronchoalveolar lavage fluid and lung tissues were collected to assess pathological changes, lipid peroxidation, inflammatory cytokine production, Nrf-2, and NF-κB expression. Our results showed that forsythiaside attenuated the infiltration of inflammatory cells, NO and inflammatory cytokines TNF-α, IL-6 and IL-1β production, and reversed the CS-induced decrease of glutathione/glutathione disulfide (GSH/GSSG) ratio. Western blot analysis showed that forsythiaside inhibited cigarette smoke-induced NF-κB activation. In addition, forsythiaside dose-dependently up-regulated the expression of Nrf2 and HO-1. In conclusion, forsythiaside protected against cigarette smoke-induced lung injury through activating Nrf2 and inhibiting NF-κB signaling pathway.
Collapse
Affiliation(s)
- Li Cheng
- Department of Comprehensive Medical, Affiliated Dongfeng Hospital of Hubei Medical College, Shiyan 442008, China
| | - Fan Li
- Department of Comprehensive Medical, Affiliated Dongfeng Hospital of Hubei Medical College, Shiyan 442008, China
| | - Rui Ma
- Department of Comprehensive Medical, Affiliated Dongfeng Hospital of Hubei Medical College, Shiyan 442008, China
| | - Xianping Hu
- Department of Comprehensive Medical, Affiliated Dongfeng Hospital of Hubei Medical College, Shiyan 442008, China.
| |
Collapse
|
27
|
Probucol Protects Against Asymmetric Dimethylarginine-Induced Apoptosis in the Cultured Human Brain Microvascular Endothelial Cells. J Mol Neurosci 2015; 57:546-53. [DOI: 10.1007/s12031-015-0635-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 07/28/2015] [Indexed: 01/01/2023]
|
28
|
NSC-87877 inhibits DUSP26 function in neuroblastoma resulting in p53-mediated apoptosis. Cell Death Dis 2015; 6:e1841. [PMID: 26247726 PMCID: PMC4558500 DOI: 10.1038/cddis.2015.207] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 06/22/2015] [Accepted: 06/30/2015] [Indexed: 01/07/2023]
Abstract
Dual specificity protein phosphatase 26 (DUSP26) is overexpressed in high-risk neuroblastoma (NB) and contributes to chemoresistance by inhibiting p53 function. In vitro, DUSP26 has also been shown to effectively inhibit p38 MAP kinase. We hypothesize that inhibiting DUSP26 will result in decreased NB cell growth in a p53 and/or p38-mediated manner. NSC-87877 (8-hydroxy-7-[(6-sulfo-2-naphthyl)azo]-5-quinolinesulfonic acid), a novel DUSP26 small molecule inhibitor, shows effective growth inhibition and induction of apoptosis in NB cell lines. NB cell lines treated with small hairpin RNA (shRNA) targeting DUSP26 also exhibit a proliferation defect both in vitro and in vivo. Treatment of NB cell lines with NSC-87877 results in increased p53 phosphorylation (Ser37 and Ser46) and activation, increased activation of downstream p38 effector proteins (heat shock protein 27 (HSP27) and MAP kinase-activated protein kinase 2 (MAPKAPK2)) and poly ADP ribose polymerase/caspase-3 cleavage. The cytotoxicity resulting from DUSP26 inhibition is partially reversed by knocking down p53 expression with shRNA and also by inhibiting p38 activity with SB203580 (4-[4-(4-fluorophenyl)-2-(4-methylsulfinylphenyl)-1H-imidazol-5-yl]pyridine). In an intrarenal mouse model of NB, NSC-87877 treatment results in decreased tumor growth and increased p53 and p38 activity. Together, these results suggest that DUSP26 inhibition with NSC-87877 is an effective strategy to induce NB cell cytotoxicity in vitro and in vivo through activation of the p53 and p38 mitogen-activated protein kinase (MAPK) tumor-suppressor pathways.
Collapse
|
29
|
Wang Q, Chuikov S, Taitano S, Wu Q, Rastogi A, Tuck SJ, Corey JM, Lundy SK, Mao-Draayer Y. Dimethyl Fumarate Protects Neural Stem/Progenitor Cells and Neurons from Oxidative Damage through Nrf2-ERK1/2 MAPK Pathway. Int J Mol Sci 2015; 16:13885-907. [PMID: 26090715 PMCID: PMC4490529 DOI: 10.3390/ijms160613885] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 06/09/2015] [Accepted: 06/12/2015] [Indexed: 01/19/2023] Open
Abstract
Multiple sclerosis (MS) is the most common multifocal inflammatory demyelinating disease of the central nervous system (CNS). Due to the progressive neurodegenerative nature of MS, developing treatments that exhibit direct neuroprotective effects are needed. Tecfidera™ (BG-12) is an oral formulation of the fumaric acid esters (FAE), containing the active metabolite dimethyl fumarate (DMF). Although BG-12 showed remarkable efficacy in lowering relapse rates in clinical trials, its mechanism of action in MS is not yet well understood. In this study, we reported the potential neuroprotective effects of dimethyl fumarate (DMF) on mouse and rat neural stem/progenitor cells (NPCs) and neurons. We found that DMF increased the frequency of the multipotent neurospheres and the survival of NPCs following oxidative stress with hydrogen peroxide (H2O2) treatment. In addition, utilizing the reactive oxygen species (ROS) assay, we showed that DMF reduced ROS production induced by H2O2. DMF also decreased oxidative stress-induced apoptosis. Using motor neuron survival assay, DMF significantly promoted survival of motor neurons under oxidative stress. We further analyzed the expression of oxidative stress-induced genes in the NPC cultures and showed that DMF increased the expression of transcription factor nuclear factor-erythroid 2-related factor 2 (Nrf2) at both levels of RNA and protein. Furthermore, we demonstrated the involvement of Nrf2-ERK1/2 MAPK pathway in DMF-mediated neuroprotection. Finally, we utilized SuperArray gene screen technology to identify additional anti-oxidative stress genes (Gstp1, Sod2, Nqo1, Srxn1, Fth1). Our data suggests that analysis of anti-oxidative stress mechanisms may yield further insights into new targets for treatment of multiple sclerosis (MS).
Collapse
Affiliation(s)
- Qin Wang
- Department of Neurology, University of Michigan Medical School, 4015 Alfred Taubman Biomedical Sciences Research Building, 109 Zina Pitcher Place, Ann Arbor, MI 48109-2200, USA.
| | - Sergei Chuikov
- Department of Neurology, University of Michigan Medical School, 4015 Alfred Taubman Biomedical Sciences Research Building, 109 Zina Pitcher Place, Ann Arbor, MI 48109-2200, USA.
| | - Sophina Taitano
- Department of Internal Medicine, Division of Rheumatology, University of Michigan Medical School, Ann Arbor, MI 48109-2200, USA.
| | - Qi Wu
- Department of Neurology, University of Michigan Medical School, 4015 Alfred Taubman Biomedical Sciences Research Building, 109 Zina Pitcher Place, Ann Arbor, MI 48109-2200, USA.
| | - Arjun Rastogi
- Geriatrics Research, Education, and Clinical Center (GRECC), VA Ann Arbor Healthcare Center, Ann Arbor, MI 48109-2200, USA.
| | - Samuel J Tuck
- Geriatrics Research, Education, and Clinical Center (GRECC), VA Ann Arbor Healthcare Center, Ann Arbor, MI 48109-2200, USA.
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109-2200, USA.
| | - Joseph M Corey
- Department of Neurology, University of Michigan Medical School, 4015 Alfred Taubman Biomedical Sciences Research Building, 109 Zina Pitcher Place, Ann Arbor, MI 48109-2200, USA.
- Geriatrics Research, Education, and Clinical Center (GRECC), VA Ann Arbor Healthcare Center, Ann Arbor, MI 48109-2200, USA.
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109-2200, USA.
| | - Steven K Lundy
- Department of Internal Medicine, Division of Rheumatology, University of Michigan Medical School, Ann Arbor, MI 48109-2200, USA.
- Graduate Program in Immunology, Program in Biomedical Sciences, University of Michigan Medical School, Ann Arbor, MI 48109-2200, USA.
| | - Yang Mao-Draayer
- Department of Neurology, University of Michigan Medical School, 4015 Alfred Taubman Biomedical Sciences Research Building, 109 Zina Pitcher Place, Ann Arbor, MI 48109-2200, USA.
| |
Collapse
|
30
|
Dedoni S, Olianas MC, Onali P. Interferon-β counter-regulates its own pro-apoptotic action by activating p38 MAPK signalling in human SH-SY5Y neuroblastoma cells. Apoptosis 2015; 19:1509-26. [PMID: 25086905 DOI: 10.1007/s10495-014-1024-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Type I interferons (IFNs) induce apoptosis of neuroblastoma cells, but the molecular mechanisms regulating this event have not been completely elucidated. Here, we investigated the role of p38 mitogen activated protein kinase (MAPK) activity, a key regulator of apoptosis and a known modulator of IFN-induced responses in non-neuronal cells. We show that in SH-SY5Y human neuroblastoma cells IFN-β induced a delayed and sustained increase of p38 MAPK activity through a novel mechanism involving the sequential activation of Janus kinase-signal transducer and activator of transcription-1 signalling, enhanced expression of the NADPH oxidase catalytic subunit gp91(phox), increased reactive oxygen species production and stimulation of the MAPK kinase kinase transforming growth factor-β-activated kinase 1. Either blockade of p38 MAPK by the second generation inhibitors BIRB0796 and VX745 or siRNA knockdown of p38α MAPK enhanced IFN-β-induced apoptosis of neuroblastoma cells. Exposure to IFN-β increased the phosphorylation of the small heat shock protein HSP27 at Ser15, Ser78 and Ser82 with a time course similar to p38 MAPK activation and this response was suppressed by either p38α MAPK depletion or pharmacological inhibition of p38 MAPK and MAPK-activated protein kinase 2 (MK2). Either silencing of HSP27 expression by siRNA or MK2 inhibition potentiated IFN-β-induced apoptotic death. These results indicate that IFN-β-induced apoptosis of human SH-SY5Y neuroblastoma cells is associated with a long-lasting up-regulation of p38 MAPK activity, stimulation of MK2 and phosphorylation of the pro-survival protein HSP27. Moreover, the data show that inhibition of p38 MAPK signalling potentiates the anti-neuroblastoma activity of the cytokine, indicating that this pathway mediates a counter-regulatory response.
Collapse
Affiliation(s)
- Simona Dedoni
- Section of Neurosciences and Clinical Pharmacology, Laboratory of Cellular and Molecular Pharmacology, Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy
| | | | | |
Collapse
|
31
|
Aquilano K, Baldelli S, Ciriolo MR. Glutathione: new roles in redox signaling for an old antioxidant. Front Pharmacol 2014; 5:196. [PMID: 25206336 PMCID: PMC4144092 DOI: 10.3389/fphar.2014.00196] [Citation(s) in RCA: 492] [Impact Index Per Article: 49.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2014] [Accepted: 08/06/2014] [Indexed: 12/26/2022] Open
Abstract
The physiological roles played by the tripeptide glutathione have greatly advanced over the past decades superimposing the research on free radicals, oxidative stress and, more recently, redox signaling. In particular, GSH is involved in nutrient metabolism, antioxidant defense, and regulation of cellular metabolic functions ranging from gene expression, DNA and protein synthesis to signal transduction, cell proliferation and apoptosis. This review will be focused on the role of GSH in cell signaling by analysing the more recent advancements about its capability to modulate nitroxidative stress, autophagy, and viral infection.
Collapse
Affiliation(s)
- Katia Aquilano
- Department of Biology, University of Rome Tor Vergata Rome, Italy
| | - Sara Baldelli
- Scientific Institute for Research, Hospitalization and Health Care, Università Telematica San Raffaele Roma Rome, Italy
| | - Maria R Ciriolo
- Department of Biology, University of Rome Tor Vergata Rome, Italy
| |
Collapse
|
32
|
Narasimhan M, Riar AK, Rathinam ML, Vedpathak D, Henderson G, Mahimainathan L. Hydrogen peroxide responsive miR153 targets Nrf2/ARE cytoprotection in paraquat induced dopaminergic neurotoxicity. Toxicol Lett 2014; 228:179-91. [PMID: 24866057 PMCID: PMC4122323 DOI: 10.1016/j.toxlet.2014.05.020] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 05/21/2014] [Accepted: 05/22/2014] [Indexed: 12/11/2022]
Abstract
Epidemiological and animal studies suggest that environmental toxins including paraquat (PQ) increase the risk of developing Parkinson's disease (PD) by damaging nigrostriatal dopaminergic neurons. We previously showed that overexpression of a group of microRNAs (miRs) affects the antioxidant promoting factor, Nrf2 and related glutathione-redox homeostasis in SH-SY5Y dopaminergic neurons. Although, dysregulation of redox balance by PQ is well documented, the role for miRs and their impact have not been elucidated. In the current study we investigated whether PQ impairs Nrf2 and its related cytoprotective machinery by misexpression of specific fine tune miRs in SH-SY5Y neurons. Real time PCR analysis revealed that PQ significantly (p<0.05) increased the expression of brain enriched miR153 with an associated decrease in Nrf2 and its function as revealed by decrease in 4× ARE activity and expression of GCLC and NQO1. Also, PQ and H2O2-induced decrease in Nrf2 3' UTR activity was restored on miR153 site mutation suggesting a 3' UTR interacting role. Overexpression of either anti-miR153 or Nrf2 cDNA devoid of 3' UTR prevented PQ and H2O2-induced loss in Nrf2 activity confirming that PQ could cause miR153 to bind to and target Nrf2 3' UTR thereby weakening the cellular antioxidant defense. Adenovirus mediated overexpression of cytoplasmic catalase (Ad cCAT) confirmed that PQ induced miR153 is hydrogen peroxide (H2O2) dependent. In addition, Ad cCAT significantly (p<0.05) negated the PQ induced dysregulation of Nrf2 and function along with minimizing ROS, caspase 3/7 activation and neuronal death. Altogether, these results suggest a critical role for oxidant mediated miR153-Nrf2/ARE pathway interaction in paraquat neurotoxicity. This novel finding facilitates the understanding of molecular mechanisms and to develop appropriate management alternatives to counteract PQ-induced neuronal pathogenesis.
Collapse
Affiliation(s)
- Madhusudhanan Narasimhan
- Department of Pharmacology and Neuroscience, Texas Tech University Health Sciences Center, Lubbock, TX 79430 USA; South Plains Alcohol and Addiction Research Center, Texas Tech University Health Sciences Center, Lubbock, TX, USA.
| | - Amanjot Kaur Riar
- Department of Pharmacology and Neuroscience, Texas Tech University Health Sciences Center, Lubbock, TX 79430 USA
| | - Mary Latha Rathinam
- Department of Pharmacology and Neuroscience, Texas Tech University Health Sciences Center, Lubbock, TX 79430 USA
| | - Dhanashree Vedpathak
- Department of Pharmacology and Neuroscience, Texas Tech University Health Sciences Center, Lubbock, TX 79430 USA
| | - George Henderson
- Department of Pharmacology and Neuroscience, Texas Tech University Health Sciences Center, Lubbock, TX 79430 USA; South Plains Alcohol and Addiction Research Center, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Lenin Mahimainathan
- Department of Pharmacology and Neuroscience, Texas Tech University Health Sciences Center, Lubbock, TX 79430 USA; South Plains Alcohol and Addiction Research Center, Texas Tech University Health Sciences Center, Lubbock, TX, USA.
| |
Collapse
|
33
|
Jiang G, Hu Y, Liu L, Cai J, Peng C, Li Q. Gastrodin protects against MPP(+)-induced oxidative stress by up regulates heme oxygenase-1 expression through p38 MAPK/Nrf2 pathway in human dopaminergic cells. Neurochem Int 2014; 75:79-88. [PMID: 24932697 DOI: 10.1016/j.neuint.2014.06.003] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Revised: 05/27/2014] [Accepted: 06/04/2014] [Indexed: 11/29/2022]
Abstract
Although the etiology of PD remains unclear, increasing evidence has shown that oxidative stress plays an important role in its pathogenesis and that of other neurodegenerative disorders. The phenolic glucoside gastrodin, a main constituent of a Chinese herbal medicine Gastrodia elata (GE) Blume, has been known to display antioxidant activity. The present study aimed to investigate the protective effects of gastrodin on 1-methyl-4-phenylpyridinium (MPP(+))-induced oxidative cytotoxicity in human dopaminergic SH-SY5Y cells and the underlying mechanism for this neuroprotection. Results indicate that pre-treatment with gastrodin for 1h significantly reduced the MPP(+)-induced viability loss, apoptotic rate and attenuated MPP(+)-mediated ROS production. In addition, gastrodin inhibited MPP(+)-induced lowered membrane potential, decreased Bcl-2/Bax ratio. Moreover, we have revealed the gastrodin increased Nrf2 nuclear translocation, which is upstream of heme oxygenase-1 (HO-1) expression and for the first time revealed gastrodin could increased antioxidant enzyme HO-1 expression in concentration-dependent and time-dependent manners. HO-1 siRNA transfection was employed, and confirmed gastrodin could active the expression of HO-1. And the increase in HO-1 expression was correlated with the protective effect of gastrodin against MPP(+)-induced injury. Because the inhibitor of HO-1 activity, ZnPP reversed the protective effect of gastrodin against MPP(+)-induced cell death. We also demonstrated that the specific p38 MAPK inhibitor, SB203580, concentration-dependently blocked on gastrodin-induced HO-1 expression, and meanwhile SB203580 reversed the protective effect of gastrodin against MPP(+)-induced cell death. Taken together, these findings suggest that gastrodin can induce HO-1 expression through activation of p38 MAPK/Nrf2 signaling pathway, thereby protecting the SH-SY5Y cells from MPP(+)-induced oxidative cell death. Thus our study indicates that gastrodin has a partial cytoprotective role in dopaminergic cell culture systems and could be of importance for the treatment of PD and other oxidative stress-related diseases.
Collapse
Affiliation(s)
- Genling Jiang
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui Province Key Laboratory of R&D of Chinese Medicine, Anhui University of Chinese Medicine, Hefei 230038, China
| | - Yuqin Hu
- Anhui Medical University, Hefei 230032, China; Department of Clinical College in No. 105 Hospital of PLA, Hefei 230031, China
| | - Lanlan Liu
- Department of Clinical College in No. 174 Hospital of PLA, Xiamen 361003, China
| | - Jiali Cai
- Department of Clinical College in No. 174 Hospital of PLA, Xiamen 361003, China
| | - Cheng Peng
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui Province Key Laboratory of R&D of Chinese Medicine, Anhui University of Chinese Medicine, Hefei 230038, China
| | - Qinglin Li
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui Province Key Laboratory of R&D of Chinese Medicine, Anhui University of Chinese Medicine, Hefei 230038, China; Anqing Medical and Pharmaceutical College, Anqing 246052, China.
| |
Collapse
|
34
|
Zhao B, Fei J, Chen Y, Ying YL, Ma L, Song XQ, Wang L, Chen EZ, Mao EQ. Pharmacological preconditioning with vitamin C attenuates intestinal injury via the induction of heme oxygenase-1 after hemorrhagic shock in rats. PLoS One 2014; 9:e99134. [PMID: 24927128 PMCID: PMC4057195 DOI: 10.1371/journal.pone.0099134] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Accepted: 05/09/2014] [Indexed: 12/17/2022] Open
Abstract
Pre-induction of heme oxygenase (HO)-1, which is regarded as an effective method of “organ preconditioning”, exerts beneficial effects during hemorrhagic shock (HS). However, the available HO-1 inducers exhibit disadvantages such as toxicity or complex technical requirements. Therefore, a safe and convenient HO-1 inducer would be promising and could be exploited in the treatment of foreseeable hemorrhaging, such as prior to major surgery. Here we investigated the effect of vitamin C (VitC), a common antioxidant, on intestinal HO-1 expression and examined whether VitC pretreatment prevented HS related intestinal tissue injuries after HO-1 induction. First, we conducted an in vitro study and found that HO-1 expression in rat intestinal epithelial cells (IEC-6) was induced by non-toxic VitC in a time and concentration dependent manner, and the mechanism was related to the activation of extracellular signal-regulated kinase 1/2 (ERK1/2). Next, we conducted an in vivo study and found that VitC induced intestinal HO-1 protein expression (mainly observed in the intestinal epithelial cells) and HO-1 activity in normal SD rats, and that these HO-1 levels were further enhanced by VitC in a rat model of HS. The HS related intestinal injuries, including histological damage, pro-inflammatory cytokine levels (tumor necrosis factor and interleukin-6), neutrophil infiltration and apoptosis decreased after VitC pretreatment, and this alleviating of organ injuries was abrogated after the inhibition of HO-1 activity by zinc protoporphyrin-IX. It was of note that VitC did little histological damage to the intestine of the sham rats. These data suggested that VitC might be applied as a safe inducer of intestinal HO-1 and that VitC pretreatment attenuated HS related intestinal injuries via the induction of HO-1.
Collapse
Affiliation(s)
- Bing Zhao
- Department of Emergency Intensive Care Unit, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Jian Fei
- Department of Surgery, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Ying Chen
- Department of Emergency Intensive Care Unit, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yi-Lin Ying
- Department of Emergency Intensive Care Unit, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Li Ma
- Department of Emergency Intensive Care Unit, the Third People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Xiao-Qin Song
- Department of Emergency Intensive Care Unit, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Lu Wang
- Department of Emergency Intensive Care Unit, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Er-Zhen Chen
- Department of Emergency Intensive Care Unit, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- * E-mail: (EQM); (EZC)
| | - En-Qiang Mao
- Department of Emergency Intensive Care Unit, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- * E-mail: (EQM); (EZC)
| |
Collapse
|
35
|
Zhu J, Wang H, Fan Y, Lin Y, Zhang L, Ji X, Zhou M. Targeting the NF-E2-related factor 2 pathway: a novel strategy for glioblastoma (review). Oncol Rep 2014; 32:443-50. [PMID: 24926991 DOI: 10.3892/or.2014.3259] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Accepted: 05/26/2014] [Indexed: 11/05/2022] Open
Abstract
Glioblastoma is the most common and malignant subtype among all brain tumors. Nuclear factor erythroid 2-related factor 2 (Nrf2) is an essential component of cellular defense against a variety of endogenous and exogenous stresses. A marked increase in research over the past few decades focusing on Nrf2 and its role in regulating glioblastoma has revealed the potential value of Nrf2 in the treatment of glioblastoma. In the present review, we discuss a novel framework of Nrf2 in the regulation of glioblastoma and the mechanisms regarding the downregulation of Nrf2 in treating glioblastoma. The candidate mechanisms include direct and indirect means. Direct mechanisms target tumor molecular pathways in order to overcome resistance to chemotherapy and radiotherapy, to inhibit proliferation, to block invasion and migration, to induce apoptosis, to promote differentiation, to enhance autophagy and to target glioblastoma stem cells. Indirect mechanisms target the reaction between glioblastoma cells and the surrounding microenvironment. Overall, the value of the Nrf2 pathway in glioblastoma provides a promising opportunity for new approaches by which to treat glioblastoma.
Collapse
Affiliation(s)
- Jianhong Zhu
- Department of Neurosurgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210002, P.R. China
| | - Handong Wang
- Department of Neurosurgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210002, P.R. China
| | - Youwu Fan
- Department of Neurosurgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210002, P.R. China
| | - Yixing Lin
- Department of Neurosurgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210002, P.R. China
| | - Li Zhang
- Department of Neurosurgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210002, P.R. China
| | - Xiangjun Ji
- Department of Neurosurgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210002, P.R. China
| | - Mengliang Zhou
- Department of Neurosurgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210002, P.R. China
| |
Collapse
|
36
|
Zou X, Gao J, Zheng Y, Wang X, Chen C, Cao K, Xu J, Li Y, Lu W, Liu J, Feng Z. Zeaxanthin induces Nrf2-mediated phase II enzymes in protection of cell death. Cell Death Dis 2014; 5:e1218. [PMID: 24810054 PMCID: PMC4047913 DOI: 10.1038/cddis.2014.190] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 03/12/2014] [Accepted: 04/02/2014] [Indexed: 12/30/2022]
Abstract
Zeaxanthin (Zea) is a major carotenoid pigment contained in human retina, and its daily supplementation associated with lower risk of age-related macular degeneration. Despite known property of Zea as an antioxidant, its underlying molecular mechanisms of action remain poorly understood. In this study, we aim to study the regulation mechanism of Zea on phase II detoxification enzymes. In normal human retinal pigment epithelium cells, Zea promoted the nuclear translocation of NF-E2-related factor 2 (Nrf2) and induced mRNA and protein expression of phase II enzymes, the induction was suppressed by specific knockdown of Nrf2. Zea also effectively protected against tert-butyl hydroperoxide-induced mitochondrial dysfunction and apoptosis. Glutathione (GSH) as the most important antioxidant was also induced by Zea through Nrf2 activation in a time- and dose-dependent manner, whereas the protective effects of Zea were decimated by inhibition of GSH synthesis. Finally, Zea activated the PI3K/Akt and MAPK/ERK pathway, whereas only PI3K/Akt activation correlated with phase II enzymes induction and Zea protection. In further in vivo analyses, Zea showed effects of inducing phase II enzymes and increased GSH content, which contributed to the reduced lipid and protein peroxidation in the retina as well as the liver, heart, and serum of the Sprague–Dawley rats. For the first time, Zea is presented as a phase II enzymes inducer instead of being an antioxidant. By activating Nrf2-mediated phase II enzymes, Zea could enhance anti-oxidative capacity and prevent cell death both in vivo and in vitro.
Collapse
Affiliation(s)
- X Zou
- 1] Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China [2] Center for Translational Medicine, Frontier Institute of Science and Technology, FIST, Xi'an Jiaotong University, Xi'an, China
| | - J Gao
- 1] Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China [2] Center for Mitochondrial Biology and Medicine, Frontier Institute of Science and Technology, FIST, Xi'an Jiaotong University, Xi'an, China
| | - Y Zheng
- Jinan Central Hospital Affiliated to Shandong University, Jinan, China
| | - X Wang
- 1] Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China [2] Center for Mitochondrial Biology and Medicine, Frontier Institute of Science and Technology, FIST, Xi'an Jiaotong University, Xi'an, China
| | - C Chen
- 1] Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China [2] Center for Mitochondrial Biology and Medicine, Frontier Institute of Science and Technology, FIST, Xi'an Jiaotong University, Xi'an, China
| | - K Cao
- 1] Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China [2] Center for Mitochondrial Biology and Medicine, Frontier Institute of Science and Technology, FIST, Xi'an Jiaotong University, Xi'an, China
| | - J Xu
- 1] Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China [2] Center for Mitochondrial Biology and Medicine, Frontier Institute of Science and Technology, FIST, Xi'an Jiaotong University, Xi'an, China
| | - Y Li
- 1] Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China [2] Center for Mitochondrial Biology and Medicine, Frontier Institute of Science and Technology, FIST, Xi'an Jiaotong University, Xi'an, China
| | - W Lu
- 1] Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China [2] Center for Translational Medicine, Frontier Institute of Science and Technology, FIST, Xi'an Jiaotong University, Xi'an, China
| | - J Liu
- 1] Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China [2] Center for Mitochondrial Biology and Medicine, Frontier Institute of Science and Technology, FIST, Xi'an Jiaotong University, Xi'an, China
| | - Z Feng
- 1] Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China [2] Center for Mitochondrial Biology and Medicine, Frontier Institute of Science and Technology, FIST, Xi'an Jiaotong University, Xi'an, China
| |
Collapse
|
37
|
Yurinskaya MM, Vinokurov MG, Grachev SV, Astashkin EI. Actovegin reduces the hydrogen peroxide-induced cell apoptosis of SK-N-SH neuroblastoma by means of p38MAPK and PI-3K inhibition. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2014; 456:215-217. [PMID: 24985520 DOI: 10.1134/s0012496614030132] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Indexed: 06/03/2023]
Affiliation(s)
- M M Yurinskaya
- Sechenov First Moscow State Medical University, Moscow, Russia
| | | | | | | |
Collapse
|
38
|
Zhang T, Zhao C, Luo L, Xiang J, Cheng J, Wang T, Chen D. High concentraction of taurocholic acid induced apoptosis in HTR-8/SVneo cells via overexpression of ERp29 and activation of p38. Placenta 2014; 35:496-500. [PMID: 24780196 DOI: 10.1016/j.placenta.2014.03.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 03/25/2014] [Accepted: 03/28/2014] [Indexed: 12/15/2022]
Abstract
INTRODUCTION Intrahepatic cholestasis of pregnancy (ICP) is a pregnancy-specific disease associated with a significant risk of fetal complications. Our previous study using an iTRAQ-based proteomics approach showed that ERp29 was overexpressed in the placenta tissue of ICP patients, which was an apoptosis-related protein and has not been investigated in the pathogenesis of ICP. The aim of this study was to explore the role of ERp29 in the mechanism of apoptosis in the placenta of ICP. METHODS HTR-8/SVneo cells were cultured and treated with different concentrations of taurocholic acid (TCA) (0, 10, 50 and 100 μM). The apoptotic index and cell cycle were detected by flow cytometry; furthermore, the expression levels of ERp29 and p-p38 were detected by western blot. The ERp29-siRNA was also used to confirm the role of ERp29 in TCA induced-apoptosis. RESULTS ERp29 expression and the apoptotic index were significantly increased in HTR-8/SVneo cells exposed to 100 μM TCA; so were p-p38 and caspase-3 activity, compared with the 50 μM, 10 μM TCA groups and negative control group (P < 0.05, respectively). The induction of apoptosis by TCA and the expression of p-p38 were reduced in HTR-8/SVneo cells after treatment with ERp29-siRNA, compared with controls (P < 0.05, respectively). CONCLUSIONS This study suggested that overexpression of ERp29 may play a key role in TCA-induced apoptosis in HTR-8/SVneo cells via activation of p38, which may participate in the pathogenesis of ICP and may represent a novel target for ICP treatment.
Collapse
Affiliation(s)
- T Zhang
- Wuxi Maternity and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi 214002, China.
| | - C Zhao
- State Key Laboratory of Reproductive Medicine, Nanjing Maternity and Child Health Hospital Affiliated to Nanjing Medical University, Nanjing 210004, China
| | - L Luo
- Department of Respiratory Medicine, Jinling Hospital, Nanjing University Medical School, Nanjing 210093, China; Wuxi Second Hospital Affiliated to Nanjing Medical University, Wuxi 214002, China
| | - J Xiang
- Wuxi Maternity and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi 214002, China
| | - J Cheng
- Wuxi Maternity and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi 214002, China
| | - T Wang
- Wuxi Maternity and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi 214002, China
| | - D Chen
- Wuxi Maternity and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi 214002, China.
| |
Collapse
|
39
|
Suo SB, Qiu JD, Shi SP, Chen X, Liang RP. PSEA: Kinase-specific prediction and analysis of human phosphorylation substrates. Sci Rep 2014; 4:4524. [PMID: 24681538 PMCID: PMC3970127 DOI: 10.1038/srep04524] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Accepted: 03/11/2014] [Indexed: 11/09/2022] Open
Abstract
Protein phosphorylation catalysed by kinases plays crucial regulatory roles in intracellular signal transduction. With the increasing number of kinase-specific phosphorylation sites and disease-related phosphorylation substrates that have been identified, the desire to explore the regulatory relationship between protein kinases and disease-related phosphorylation substrates is motivated. In this work, we analysed the kinases' characteristic of all disease-related phosphorylation substrates by using our developed Phosphorylation Set Enrichment Analysis (PSEA) method. We evaluated the efficiency of our method with independent test and concluded that our approach is reliable for identifying kinases responsible for phosphorylated substrates. In addition, we found that Mitogen-activated protein kinase (MAPK) and Glycogen synthase kinase (GSK) families are more associated with abnormal phosphorylation. It can be anticipated that our method might be helpful to identify the mechanism of phosphorylation and the relationship between kinase and phosphorylation related diseases. A user-friendly web interface is now freely available at http://bioinfo.ncu.edu.cn/PKPred_Home.aspx.
Collapse
Affiliation(s)
- Sheng-Bao Suo
- Department of Chemistry, Nanchang University, Nanchang, 330031, China
| | - Jian-Ding Qiu
- 1] Department of Chemistry, Nanchang University, Nanchang, 330031, China [2] Department of Chemical Engineering, Pingxiang College, Pingxiang, 337055, China
| | - Shao-Ping Shi
- 1] Department of Chemistry, Nanchang University, Nanchang, 330031, China [2] Department of Mathematics, Nanchang University, Nanchang, 330031, China
| | - Xiang Chen
- Department of Chemistry, Nanchang University, Nanchang, 330031, China
| | - Ru-Ping Liang
- Department of Chemistry, Nanchang University, Nanchang, 330031, China
| |
Collapse
|
40
|
Chirullo B, Sgarbanti R, Limongi D, Shytaj IL, Alvarez D, Das B, Boe A, DaFonseca S, Chomont N, Liotta L, Petricoin EI, Norelli S, Pelosi E, Garaci E, Savarino A, Palamara AT. A candidate anti-HIV reservoir compound, auranofin, exerts a selective 'anti-memory' effect by exploiting the baseline oxidative status of lymphocytes. Cell Death Dis 2013; 4:e944. [PMID: 24309931 PMCID: PMC3877546 DOI: 10.1038/cddis.2013.473] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 10/26/2013] [Accepted: 10/31/2013] [Indexed: 01/05/2023]
Abstract
Central memory (TCM) and transitional memory (TTM) CD4+ T cells are known to be the major cellular reservoirs for HIV, as these cells can harbor a transcriptionally silent form of viral DNA that is not targeted by either the immune system or current antiretroviral drug regimens. In the present study, we explored the molecular bases of the anti-HIV reservoir effects of auranofin (AF), a pro-oxidant gold-based drug and a candidate compound for a cure of AIDS. We here show that TCM and TTM lymphocytes have lower baseline antioxidant defenses as compared with their naive counterpart. These differences are mirrored by the effects exerted by AF on T-lymphocytes: AF was able to exert a pro-differentiating and pro-apoptotic effect, which was more pronounced in the memory subsets. AF induced an early activation of the p38 mitogen-activated protein kinase (p38 MAPK) followed by mitochondrial depolarization and a final burst in intracellular peroxides. The pro-differentiating effect was characterized by a downregulation of the CD27 marker expression. Interestingly, AF-induced apoptosis was inhibited by pyruvate, a well-known peroxide scavenger, but pyruvate did not inhibit the pro-differentiating effect of AF, indicating that the pro-apoptotic and pro-differentiating effects involve different pathways. In conclusion, our results demonstrate that AF selectively targets the TCM/TTM lymphocyte subsets, which encompass the HIV reservoir, by affecting redox-sensitive cell death pathways.
Collapse
Affiliation(s)
- B Chirullo
- Istituto Superiore di Sanità, Viale Regina Elena, 299, Rome, Italy
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Gañán-Gómez I, Wei Y, Yang H, Boyano-Adánez MC, García-Manero G. Oncogenic functions of the transcription factor Nrf2. Free Radic Biol Med 2013; 65:750-764. [PMID: 23820265 DOI: 10.1016/j.freeradbiomed.2013.06.041] [Citation(s) in RCA: 163] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Revised: 05/30/2013] [Accepted: 06/24/2013] [Indexed: 02/03/2023]
Abstract
Nuclear factor E2-related factor 2 (Nrf2) is a transcription factor that controls the expression of a large pool of antioxidant and cytoprotective genes regulating the cellular response to oxidative and electrophilic stress. Nrf2 is negatively regulated by Kelch-like ECH-associated protein 1 (Keap1) and, upon stimulation by an oxidative or electrophilic insult, is rapidly activated by protein stabilization. Owing to its cytoprotective functions, Nrf2 has been traditionally studied in the field of chemoprevention; however, there is accumulated evidence that Keap1/Nrf2 mutations or unbalanced regulation that leads to overexpression or hyperactivation of Nrf2 may participate in tumorigenesis and be involved in chemoresistance of a wide number of solid cancers and leukemias. In addition to protecting cells from reactive oxygen species, Nrf2 seems to play a direct role in cell growth control and is related to apoptosis-regulating pathways. Moreover, Nrf2 activity is connected with oncogenic kinase pathways, structural proteins, hormonal regulation, other transcription factors, and epigenetic enzymes involved in the pathogenesis of various types of tumors. The aim of this review is to compile and summarize existing knowledge of the oncogenic functions of Nrf2 to provide a solid basis for its potential use as a molecular marker and pharmacological target in cancer.
Collapse
Affiliation(s)
- Irene Gañán-Gómez
- Department of System Biology, Biochemistry and Molecular Biology Unit, University of Alcalá, 28871 Alcalá de Henares (Madrid), Spain.
| | - Yue Wei
- Department of Leukemia, University of Texas M.D. Anderson Cancer Center, 77030 Houston, TX, USA
| | - Hui Yang
- Department of Leukemia, University of Texas M.D. Anderson Cancer Center, 77030 Houston, TX, USA
| | - María Carmen Boyano-Adánez
- Department of System Biology, Biochemistry and Molecular Biology Unit, University of Alcalá, 28871 Alcalá de Henares (Madrid), Spain
| | - Guillermo García-Manero
- Department of Leukemia, University of Texas M.D. Anderson Cancer Center, 77030 Houston, TX, USA
| |
Collapse
|
42
|
Baldelli S, Aquilano K, Ciriolo MR. Punctum on two different transcription factors regulated by PGC-1α: Nuclear factor erythroid-derived 2-like 2 and nuclear respiratory factor 2. Biochim Biophys Acta Gen Subj 2013; 1830:4137-46. [DOI: 10.1016/j.bbagen.2013.04.006] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 03/21/2013] [Accepted: 04/02/2013] [Indexed: 12/30/2022]
|
43
|
Rai P, Plagov A, Lan X, Chandel N, Singh T, Lederman R, Ayasolla KR, Mathieson PW, Saleem MA, Husain M, Malhotra A, Chander PN, Singhal PC. mTOR plays a critical role in p53-induced oxidative kidney cell injury in HIVAN. Am J Physiol Renal Physiol 2013; 305:F343-54. [PMID: 23678040 PMCID: PMC3742868 DOI: 10.1152/ajprenal.00135.2013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Accepted: 05/08/2013] [Indexed: 11/22/2022] Open
Abstract
Oxidative stress has been implicated to contribute to HIV-induced kidney cell injury; however, the role of p53, a modulator of oxidative stress, has not been evaluated in the development of HIV-associated nephropathy (HIVAN). We hypothesized that mammalian target of rapamycin (mTOR) may be critical for the induction of p53-mediated oxidative kidney cell injury in HIVAN. To test our hypothesis, we evaluated the effect of an mTOR inhibitor, rapamycin, on kidney cell p53 expression, downstream signaling, and kidney cell injury in both in vivo and in vitro studies. Inhibition of the mTOR pathway resulted in downregulation of renal tissue p53 expression, associated downstream signaling, and decreased number of sclerosed glomeruli, tubular microcysts, and apoptosed and 8-hydroxy deoxyguanosine (8-OHdG)-positive (+ve) cells in Tg26 mice. mTOR inhibition not only attenuated kidney cell expression of p66ShcA and phospho-p66ShcA but also reactivated the redox-sensitive stress response program in the form of enhanced expression of manganese superoxide dismutase (MnSOD) and catalase. In in vitro studies, the mTOR inhibitor also provided protection against HIV-induced podocyte apoptosis. Moreover, mTOR inhibition downregulated HIV-induced podocyte (HP/HIV) p53 expression. Since HP/HIV silenced for mTOR displayed a lack of expression of p53 as well as attenuated podocyte apoptosis, this suggests that mTOR is critical for kidney cell p53 activation and associated oxidative kidney cell injury in the HIV milieu.
Collapse
Affiliation(s)
- Partab Rai
- Department of Medicine, Feinstein Institute for Medical Research, Hofstra North Shore LIJ Medical School, Great Neck, NY, USA
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Flores-López LA, Díaz-Flores M, García-Macedo R, Ávalos-Rodríguez A, Vergara-Onofre M, Cruz M, Contreras-Ramos A, Konigsberg M, Ortega-Camarillo C. High glucose induces mitochondrial p53 phosphorylation by p38 MAPK in pancreatic RINm5F cells. Mol Biol Rep 2013; 40:4947-58. [PMID: 23657598 DOI: 10.1007/s11033-013-2595-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Accepted: 04/29/2013] [Indexed: 01/09/2023]
Abstract
Pancreatic β-cell death in type 2 diabetes has been related to p53 subcellular localisation and phosphorylation. However, the mechanisms by which p53 is phosphorylated and its activation in response to oxidative stress remain poorly understood. Therefore, the aim of this study was to investigate mitochondrial p53 phosphorylation, its subcellular localisation and its relationship with apoptotic induction in RINm5F cells cultured under high glucose conditions. Our results show that p53 phosphorylation in the mitochondrial fraction was greater at ser392 than at ser15. This increased phosphorylation correlated with an increase in reactive oxygen species, a decrease in the Bcl-2/Bax ratio, a release of cytochrome c and an increase in the rate of apoptosis. We also observed a decline in ERK 1/2 phosphorylation over time, which is an indicator of cell proliferation. To identify the kinase responsible for phosphorylating p53, p38 mitogen-activated protein kinase (MAPK) activation was analysed. We found that high glucose induced an increase in p38 MAPK phosphorylation in the mitochondria after 24-72 h. Moreover, the phosphorylation of p53 (ser392) by p38 MAPK in mitochondria was confirmed by colocalisation studies with confocal microscopy. The addition of a specific p38 MAPK inhibitor (SB203580) to the culture medium during high glucose treatment blocked p53 mobilisation to the mitochondria and phosphorylation; thus, the release of cytochrome c and the apoptosis rate in RINm5F cells decreased. These results suggest that mitochondrial p53 phosphorylation by p38 MAPK plays an important role in RINm5F cell death under high glucose conditions.
Collapse
Affiliation(s)
- Luis A Flores-López
- Unidad de Investigación Médica en Bioquímica, HE, Centro Médico Nacional Siglo XXI. IMSS., Av. Cuauhtémoc 330, Col Doctores, Del. Cuauhtémoc, México, DF, Mexico
| | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Overcoming Drug Resistance Through Elevation of ROS in Cancer. RESISTANCE TO TARGETED ANTI-CANCER THERAPEUTICS 2013. [DOI: 10.1007/978-1-4614-7070-0_7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
46
|
Anthocyanins protect human endothelial cells from mild hyperoxia damage through modulation of Nrf2 pathway. GENES AND NUTRITION 2012; 8:391-9. [PMID: 23229494 DOI: 10.1007/s12263-012-0324-4] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Accepted: 10/18/2012] [Indexed: 10/27/2022]
Abstract
The detrimental effects of high oxygen supplementation have been widely reported. Conversely, few is known about the effects of exposure to mild hyperoxic conditions, an interesting issue since the use of oxygen-enriched mixture is now increasingly used in clinical practice and especially for professional and recreational reasons. Our study investigated if in vitro exposure of human umbilical vein endothelial cells (HUVECs) to moderate hyperoxia (O2 32 %) induces cellular alterations, measured as changes in cell signaling pathways. Furthermore, by means of an ex vivo experimental model where human volunteers were used as bioreactors, we studied whether anthocyanin metabolites are able to protect HUVECs against mild hyperoxia-induced damage. We observed that the cytotoxic effect of mild hyperoxia came along with a significant decrease in nuclear accumulation of the transcription factor Nrf2, as well as in the expression of Nrf2-regulated antioxidant and cytoprotective genes. Furthermore, under normoxic conditions, anthocyanin metabolites appeared able to activate the Nrf2 pathway, through the involvement of specific kinases (ERK1/2); this adaptive effect may explain the protective effect observed in mild hyperoxia-exposed HUVECs following anthocyanin pretreatment. This study confirms that dietary anthocyanins and/or their metabolites can protect endothelial cells against mild hyperoxia-induced alterations acting as cell signaling modulators.
Collapse
|
47
|
Sanmartín C, Plano D, Sharma AK, Palop JA. Selenium compounds, apoptosis and other types of cell death: an overview for cancer therapy. Int J Mol Sci 2012; 13:9649-9672. [PMID: 22949823 PMCID: PMC3431821 DOI: 10.3390/ijms13089649] [Citation(s) in RCA: 176] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Revised: 07/23/2012] [Accepted: 07/24/2012] [Indexed: 02/07/2023] Open
Abstract
Selenium (Se) is an essential trace element involved in different physiological functions of the human body and plays a role in cancer prevention and treatment. Induction of apoptosis is considered an important cellular event that can account for the cancer preventive effects of Se. The mechanisms of Se-induced apoptosis are associated with the chemical forms of Se and their metabolism as well as the type of cancer studied. So, some selenocompounds, such as SeO2 involve the activation of caspase-3 while sodium selenite induces apoptosis in the absence of the activation of caspases. Modulation of mitochondrial functions has been reported to play a key role in the regulation of apoptosis and also to be one of the targets of Se compounds. Other mechanisms for apoptosis induction are the modulation of glutathione and reactive oxygen species levels, which may function as intracellular messengers to regulate signaling pathways, or the regulation of kinase, among others. Emerging evidence indicates the overlaps between the apoptosis and other types of cell death such as autophagy. In this review we report different processes of cell death induced by Se compounds in cancer treatment and prevention.
Collapse
Affiliation(s)
- Carmen Sanmartín
- Department of Organic and Pharmaceutical Chemistry, University of Navarra, Irunlarrea 1, Pamplona E-31008, Spain; E-Mails: (D.P.); (J.A.P.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +34-948-425-600; Fax: +34-948-425-649
| | - Daniel Plano
- Department of Organic and Pharmaceutical Chemistry, University of Navarra, Irunlarrea 1, Pamplona E-31008, Spain; E-Mails: (D.P.); (J.A.P.)
- Department of Pharmacology, Penn State Hershey Cancer Institute, Penn State Hershey College of Medicine, CH72, 500 University Drive, Hershey, PA 17033, USA; E-Mail:
| | - Arun K. Sharma
- Department of Pharmacology, Penn State Hershey Cancer Institute, Penn State Hershey College of Medicine, CH72, 500 University Drive, Hershey, PA 17033, USA; E-Mail:
| | - Juan Antonio Palop
- Department of Organic and Pharmaceutical Chemistry, University of Navarra, Irunlarrea 1, Pamplona E-31008, Spain; E-Mails: (D.P.); (J.A.P.)
| |
Collapse
|
48
|
Circu ML, Aw TY. Glutathione and modulation of cell apoptosis. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2012; 1823:1767-77. [PMID: 22732297 DOI: 10.1016/j.bbamcr.2012.06.019] [Citation(s) in RCA: 232] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2012] [Revised: 05/24/2012] [Accepted: 06/13/2012] [Indexed: 01/01/2023]
Abstract
Apoptosis is a highly organized form of cell death that is important for tissue homeostasis, organ development and senescence. To date, the extrinsic (death receptor mediated) and intrinsic (mitochondria derived) apoptotic pathways have been characterized in mammalian cells. Reduced glutathione, is the most prevalent cellular thiol that plays an essential role in preserving a reduced intracellular environment. glutathione protection of cellular macromolecules like deoxyribose nucleic acid proteins and lipids against oxidizing, environmental and cytotoxic agents, underscores its central anti-apoptotic function. Reactive oxygen and nitrogen species can oxidize cellular glutathione or induce its extracellular export leading to the loss of intracellular redox homeostasis and activation of the apoptotic signaling cascade. Recent evidence uncovered a novel role for glutathione involvement in apoptotic signaling pathways wherein post-translational S-glutathiolation of protein redox active cysteines is implicated in the potentiation of apoptosis. In the present review we focus on the key aspects of glutathione redox mechanisms associated with apoptotic signaling that includes: (a) changes in cellular glutathione redox homeostasis through glutathione oxidation or GSH transport in relation to the initiation or propagation of the apoptotic cascade, and (b) evidence for S-glutathiolation in protein modulation and apoptotic initiation.
Collapse
Affiliation(s)
- Magdalena L Circu
- Department of Molecular & Cellular Physiology, Louisiana University Health Sciences Center, Shreveport, LA 71130, USA
| | | |
Collapse
|