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Erler K, Krafczyk N, Steinbrenner H, Klotz L. Selective activation of cellular stress response pathways by fumaric acid esters. FEBS Open Bio 2024; 14:1230-1246. [PMID: 38794848 PMCID: PMC11301269 DOI: 10.1002/2211-5463.13833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Accepted: 05/13/2024] [Indexed: 05/26/2024] Open
Abstract
The cellular response to oxidants or xenobiotics comprises two key pathways, resulting in modulation of NRF2 and FOXO transcription factors, respectively. Both mount a cytoprotective response, and their activation relies on crucial protein thiol moieties. Using fumaric acid esters (FAEs), known thiol-reactive compounds, we tested for activation of NRF2 and FOXO pathways in cultured human hepatoma cells by dimethyl/diethyl as well as monomethyl/monoethyl fumarate. Whereas only the diesters caused acute glutathione depletion and activation of the stress kinase p38MAPK, all four FAEs stimulated NRF2 stabilization and upregulation of NRF2 target genes. However, no significant FAE-induced activation of FOXO-dependent target gene expression was observed. Therefore, while both NRF2 and FOXO pathways are responsive to oxidants and xenobiotics, FAEs selectively activate NRF2 signaling.
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Affiliation(s)
- Katrin Erler
- Nutrigenomics Section, Institute of Nutritional SciencesFriedrich Schiller UniversityJenaGermany
| | - Niklas Krafczyk
- Nutrigenomics Section, Institute of Nutritional SciencesFriedrich Schiller UniversityJenaGermany
| | - Holger Steinbrenner
- Nutrigenomics Section, Institute of Nutritional SciencesFriedrich Schiller UniversityJenaGermany
| | - Lars‐Oliver Klotz
- Nutrigenomics Section, Institute of Nutritional SciencesFriedrich Schiller UniversityJenaGermany
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Abdo AI, Kopecki Z. Comparing Redox and Intracellular Signalling Responses to Cold Plasma in Wound Healing and Cancer. Curr Issues Mol Biol 2024; 46:4885-4923. [PMID: 38785562 PMCID: PMC11120013 DOI: 10.3390/cimb46050294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 05/10/2024] [Accepted: 05/15/2024] [Indexed: 05/25/2024] Open
Abstract
Cold plasma (CP) is an ionised gas containing excited molecules and ions, radicals, and free electrons, and which emits electric fields and UV radiation. CP is potently antimicrobial, and can be applied safely to biological tissue, birthing the field of plasma medicine. Reactive oxygen and nitrogen species (RONS) produced by CP affect biological processes directly or indirectly via the modification of cellular lipids, proteins, DNA, and intracellular signalling pathways. CP can be applied at lower levels for oxidative eustress to activate cell proliferation, motility, migration, and antioxidant production in normal cells, mainly potentiated by the unfolded protein response, the nuclear factor-erythroid factor 2-related factor 2 (Nrf2)-activated antioxidant response element, and the phosphoinositide 3-kinase/protein kinase B (PI3K/Akt) pathway, which also activates nuclear factor-kappa B (NFκB). At higher CP exposures, inactivation, apoptosis, and autophagy of malignant cells can occur via the degradation of the PI3K/Akt and mitogen-activated protein kinase (MAPK)-dependent and -independent activation of the master tumour suppressor p53, leading to caspase-mediated cell death. These opposing responses validate a hormesis approach to plasma medicine. Clinical applications of CP are becoming increasingly realised in wound healing, while clinical effectiveness in tumours is currently coming to light. This review will outline advances in plasma medicine and compare the main redox and intracellular signalling responses to CP in wound healing and cancer.
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Affiliation(s)
- Adrian I. Abdo
- Richter Lab, Surgical Specialties, Adelaide Medical School, University of Adelaide, Adelaide, SA 5000, Australia
- Department of Surgery, The Basil Hetzel Institute for Translational Health Research, The Queen Elizabeth Hospital, Woodville, SA 5011, Australia
| | - Zlatko Kopecki
- Future Industries Institute, STEM Academic Unit, University of South Australia, Mawson Lakes, SA 5095, Australia
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Lal R, Dharavath RN, Chopra K. Nrf2 Signaling Pathway: a Potential Therapeutic Target in Combating Oxidative Stress and Neurotoxicity in Chemotherapy-Induced Cognitive Impairment. Mol Neurobiol 2024; 61:593-608. [PMID: 37644279 DOI: 10.1007/s12035-023-03559-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 08/05/2023] [Indexed: 08/31/2023]
Abstract
Chemotherapy-induced cognitive impairment (CICI) is one of the major adverse effects of antineoplastic drugs, which decrease the quality of life in cancer survivors. Extensive experimental and clinical research suggests that chemotherapeutic drugs generate an enormous amount of reactive oxygen species (ROS), contributing to oxidative stress, neuroinflammation, blood-brain barrier (BBB) disruption, and neuronal death, eventually leading to CICI. Despite the progress in exploring different pathological mechanisms of CICI, effective treatment to prevent CICI progression has not been developed yet. Nrf2 is the principal transcription factor that regulates cellular redox balance and inflammation-related gene expression. Emerging evidence suggests that upregulation of Nrf2 and its target genes could suppress oxidative stress, and neuroinflammation, restore BBB integrity, and increase neurogenesis. This review discusses the role of Nrf2 in CICI, how it responds to oxidative stress, inflammation, neurotoxicity, and potential Nrf2 activators that could be used to enhance Nrf2 activation in CICI.
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Affiliation(s)
- Roshan Lal
- Pharmacology Division, University Institute of Pharmaceutical Sciences (UIPS), Panjab University, Chandigarh, 160014, India
| | - Ravinder Naik Dharavath
- Pharmacology Division, University Institute of Pharmaceutical Sciences (UIPS), Panjab University, Chandigarh, 160014, India
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, M5T 1R8, Canada
| | - Kanwaljit Chopra
- Pharmacology Division, University Institute of Pharmaceutical Sciences (UIPS), Panjab University, Chandigarh, 160014, India.
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Bukke VN, Moola A, Serviddio G, Vendemiale G, Bellanti F. Nuclear factor erythroid 2-related factor 2-mediated signaling and metabolic associated fatty liver disease. World J Gastroenterol 2022; 28:6909-6921. [PMID: 36632321 PMCID: PMC9827579 DOI: 10.3748/wjg.v28.i48.6909] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 11/05/2022] [Accepted: 11/23/2022] [Indexed: 12/26/2022] Open
Abstract
Oxidative stress is a key driver in the development and progression of several diseases, including metabolic associated fatty liver disease (MAFLD). This condition includes a wide spectrum of pathological injuries, extending from simple steatosis to inflammation, fibrosis, cirrhosis, and hepatocellular carcinoma. Excessive buildup of lipids in the liver is strictly related to oxidative stress in MAFLD, progressing to liver fibrosis and cirrhosis. The nuclear factor erythroid 2-related factor 2 (NRF2) is a master regulator of redox homeostasis. NRF2 plays an important role for cellular protection by inducing the expression of genes related to antioxidant, anti-inflammatory, and cytoprotective response. Consistent evidence demonstrates that NRF2 is involved in every step of MAFLD deve-lopment, from simple steatosis to inflammation, advanced fibrosis, and ini-tiation/progression of hepatocellular carcinoma. NRF2 activators regulate lipid metabolism and oxidative stress alleviating the fatty liver disease by inducing the expression of cytoprotective genes. Thus, modulating NRF2 activation is crucial not only in understanding specific mechanisms underlying MAFLD progression but also to characterize effective therapeutic strategies. This review outlined the current knowledge on the effects of NRF2 pathway, modulators, and mechanisms involved in the therapeutic implications of liver steatosis, inflammation, and fibrosis in MAFLD.
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Affiliation(s)
- Vidyasagar Naik Bukke
- Department of Medical and Surgical Sciences, University of Foggia, Foggia 71122, Italy
| | - Archana Moola
- Department of Medical and Surgical Sciences, University of Foggia, Foggia 71122, Italy
| | - Gaetano Serviddio
- Department of Medical and Surgical Sciences, University of Foggia, Foggia 71122, Italy
| | - Gianluigi Vendemiale
- Department of Medical and Surgical Sciences, University of Foggia, Foggia 71122, Italy
| | - Francesco Bellanti
- Department of Medical and Surgical Sciences, University of Foggia, Foggia 71122, Italy
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Multifaceted Roles of the KEAP1–NRF2 System in Cancer and Inflammatory Disease Milieu. Antioxidants (Basel) 2022; 11:antiox11030538. [PMID: 35326187 PMCID: PMC8944524 DOI: 10.3390/antiox11030538] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 03/09/2022] [Accepted: 03/10/2022] [Indexed: 02/06/2023] Open
Abstract
In a multicellular environment, many different types of cells interact with each other. The KEAP1–NRF2 system defends against electrophilic and oxidative stresses in various types of cells. However, the KEAP1–NRF2 system also regulates the expression of genes involved in cell proliferation and inflammation, indicating that the system plays cell type-specific roles. In this review, we introduce the multifarious roles of the KEAP1–NRF2 system in various types of cells, especially focusing on cancer and inflammatory diseases. Cancer cells frequently hijack the KEAP1–NRF2 system, and NRF2 activation confers cancer cells with a proliferative advantage and therapeutic resistance. In contrast, the activation of NRF2 in immune cells, especially in myeloid cells, suppresses tumor development. In chronic inflammatory diseases, such as sickle cell disease, NRF2 activation in myeloid and endothelial cells represses the expression of proinflammatory cytokine and adherent molecule genes, mitigating inflammation and organ damage. Based on these cell-specific roles played by the KEAP1–NRF2 system, NRF2 inducers have been utilized for the treatment of inflammatory diseases. In addition, the use of NRF2 inducers and/or inhibitors with canonical antineoplastic drugs is an emerging approach to cancer treatment.
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Zhou J, Zheng Q, Chen Z. The Nrf2 Pathway in Liver Diseases. Front Cell Dev Biol 2022; 10:826204. [PMID: 35223849 PMCID: PMC8866876 DOI: 10.3389/fcell.2022.826204] [Citation(s) in RCA: 50] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 01/17/2022] [Indexed: 12/11/2022] Open
Abstract
Oxidative stress is the leading cause of most liver diseases, such as drug-induced liver injury, viral hepatitis, and alcoholic hepatitis caused by drugs, viruses, and ethanol. The Kelch-like ECH-associated protein 1-NFE2-related factor 2 (Keap1-Nrf2) system is a critical defense mechanism of cells and organisms in response to oxidative stress. Accelerating studies have clarified that the Keap1-Nrf2 axis are involved in the prevention and attenuation of liver injury. Nrf2 up-regulation could alleviate drug-induced liver injury in mice. Moreover, many natural Nrf2 activators can regulate lipid metabolism and oxidative stress of liver cells to alleviate fatty liver disease in mice. In virus hepatitis, the increased Nrf2 can inhibit hepatitis C viral replication by up-regulating hemeoxygenase-1. In autoimmune liver diseases, the increased Nrf2 is essential for mice to resist liver injury. In liver cirrhosis, the enhanced Nrf2 reduces the activation of hepatic stellate cells by reducing reactive oxygen species levels to prevent liver fibrosis. Nrf2 plays a dual function in liver cancer progression. At present, a Nrf2 agonist has received clinical approval. Therefore, activating the Nrf2 pathway to induce the expression of cytoprotective genes is a potential option for treating liver diseases. In this review, we comprehensively summarized the relationships between oxidative stress and liver injury, and the critical role of the Nrf2 pathway in multiple liver diseases.
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Vahdati SN, Lashkari A, Navasatli SA, Ardestani SK, Safavi M. Butylated hydroxyl-toluene, 2,4-Di-tert-butylphenol, and phytol of Chlorella sp. protect the PC12 cell line against H 2O 2-induced neurotoxicity. Biomed Pharmacother 2021; 145:112415. [PMID: 34775236 DOI: 10.1016/j.biopha.2021.112415] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Revised: 10/21/2021] [Accepted: 11/05/2021] [Indexed: 12/12/2022] Open
Abstract
Oxidative stress is considered the main cause of cellular damage in a number of neurodegenerative disorders. One suitable ways to prevent cell damage is the use of the exogenous antioxidant capacity of natural products, such as microalgae. In the present study, four microalgae extracts, isolated from the Persian Gulf, were screened to analyze their potential antioxidant activity and free radical scavenging using ABTS, DPPH, and FRAP methods. The methanolic extracts (D1M) of green microalgae derived from Chlorella sp. exhibited potent free radical scavenging activity. In order to characterize microalgae species, microscopic observations and analysis of the expression of 18S rRNA were performed. The antioxidant and neuroprotective effects of D1M on H2O2-induced toxicity in PC12 cells were investigated. The results demonstrated that D1M significantly decreased the release of nitric oxide (NO), formation of intracellular reactive oxygen species (ROS), and the level of malondialdehyde (MDA), whereas it enhanced the content of glutathione (GSH), and activity of heme oxygenase 1 (HO-1), NAD(P)H: quinone oxidoreductase 1 (NQO1), and catalase (CAT) in PC12 cells exposed to H2O2. The pretreatment of D1M improved cell viability as measured by the MTT assay and invert microscopy, reduced cell apoptosis as examined by flow cytometry analysis, increased mitochondrial membrane potential (MMP), and diminished caspase-3 activity. The GC/MS analysis revealed that D1M ingredients have powerful antioxidant and anti-inflammatory compounds, such as butylated hydroxytoluene (BHT), 2,4-di-tert-butyl-phenol (2,4-DTBP), and phytol. These results suggested that Chlorella sp. extracts have strong potential to be applied as neuroprotective agents, for the treatment of neurodegenerative disorders.
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Affiliation(s)
- Saeed Niazi Vahdati
- Institute of Biochemistry and Biophysics, Department of Biochemistry, University of Tehran, Tehran, Iran
| | - Ali Lashkari
- Institute of Biochemistry and Biophysics, Department of Biochemistry, University of Tehran, Tehran, Iran
| | - Sepideh Aliniaye Navasatli
- Institute of Biochemistry and Biophysics, Department of Biochemistry, University of Tehran, Tehran, Iran
| | - Susan Kabudanian Ardestani
- Institute of Biochemistry and Biophysics, Department of Biochemistry, University of Tehran, Tehran, Iran
| | - Maliheh Safavi
- Department of Biotechnology, Iranian Research Organization for Science and Technology, Tehran, Iran.
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Wang B, Liu P, Huang H, Wang X, Zhang M, Huang J, Lu F, Chen J, Liu Y, Kang Z. Carbon dots up-regulate heme oxygenase-1 expression towards acute lung injury therapy. J Mater Chem B 2021; 9:9005-9011. [PMID: 34617947 DOI: 10.1039/d1tb01283e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pneumonia is a kind of inflammation, which can cause high morbidity and mortality, and the treatment of pneumonia has received widespread attention. Heme oxygenase-1 (HMOX1) is a cell protective enzyme and can generate an anti-inflammatory response. Here, we demonstrate that degradable carbon dots (from L-ascorbic acid, CDs-1) can up-regulate the expression of HMOX1 in animal cells and tissues, which has a therapeutic effect on LPS-induced acute lung injury in mice. It was confirmed from in vitro experiments that CDs-1 could significantly up-regulate the expression of mRNA and the protein of HMOX1, which can increase the expression of HMOX1 by 5 times in a short time, decreasing the reactive oxygen species level in a cellular inflammation model induced by LPS. Furthermore, a series of in vivo comparative experiments show that CDs-1 could effectively treat acute lung injury and improve the survival rate of mice to 80%. Our work provides a practical way for the treatment of acute inflammation and the promising application of CDs in anti-inflammation.
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Affiliation(s)
- Bo Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, China.
| | - Peipei Liu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, China.
| | - Hui Huang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, China.
| | - Xiting Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, China.
| | - Mengling Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, China.
| | - Jian Huang
- School of Biology & Basic Medical Science, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, China
| | - Fang Lu
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing 100029, China.
| | - Jian Chen
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, China. .,Chinese Institute for Brain Research, Research Unit of Medical Neurobiology, Chinese Academy of Medical Sciences, Beijing, 102206, China.
| | - Yang Liu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, China.
| | - Zhenhui Kang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, China. .,Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Taipa 999078, Macau SAR, China
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Xu J, Li D, Lu Y, Zheng TY. Aβ monomers protect lens epithelial cells against oxidative stress by upregulating CDC25B. Free Radic Biol Med 2021; 175:161-170. [PMID: 34478836 DOI: 10.1016/j.freeradbiomed.2021.08.242] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 08/27/2021] [Accepted: 08/30/2021] [Indexed: 12/30/2022]
Abstract
Our previous studies showed high β-amyloid (Aβ) expression levels in the nuclei of the lens epithelial cells (LECs) of healthy subjects and revealed that Aβ monomers could protect LECs from oxidative damage. Here, we further explored the mechanism by which Aβ monomers act as transcription factors to regulate the oxidative stress of LECs through high-throughput studies. First, we compared the Aβ-binding sites in the lens epithelia (LE) of age-related cataract patients with those in the LE of healthy donors via chromatin immunoprecipitation-sequencing (ChIP-seq), and we identified comparable numbers (1648 and 1445, respectively) of Aβ peaks. Then, the KEGG tool was used for gene function enrichment analysis of these genes, which were more highly enriched in healthy LE. Combining the literature review with these KEGG analysis results, in the current study, we chose four target genes related to oxidative stress, namely, CDC25B, SOS2, CTNNA1 and Cox6a1. Then, ChIP-PCR assays, dual-luciferase reporter assays, real-time PCR and Western blotting were performed to validate the regulatory effects of Aβ on these targets. Our data suggested that Aβ monomers could upregulate the mRNA and protein expression levels of CDC25B in LECs. We also confirmed that Aβ monomers could activate the Akt/Nrf2 pathway in a CDC25B-dependent manner by knockdown experiments in cultured LECs. Furthermore, we performed functional verification of the CDC25B-mediated protective effects of Aβ monomers against oxidative stress. We observed that Aβ monomers significantly improved the antioxidant capacity (the GSH level, SOD activity and total antioxidant capacity) and decreased the oxidative stress (the ROS and MDA levels) of LECs, while CDC25B knockdown decreased the antioxidant effects of Aβ, disrupting redox homeostasis. Therefore, we propose that Aβ monomers activate the Akt/Nrf2 pathway by upregulating CDC25B expression, increase various downstream antioxidant enzyme levels, maintain peroxidation-antioxidant homeostasis in LECs, and prevent the cell damage caused by oxidative stress.
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Affiliation(s)
- Jie Xu
- Department of Ophthalmology, Eye and ENT Hospital, Fudan University, 83 Fenyang Rd., Shanghai 200031, China; Eye Institute, Eye and ENT Hospital, Fudan University, 83 Fenyang Rd., Shanghai 200031, China; Key Laboratory of Myopia, Ministry of Health, 83 Fenyang Rd., Shanghai 200031, China; Shanghai Key Laboratory of Visual Impairment and Restoration, 83 Fenyang Rd., Shanghai 200031, China
| | - Dan Li
- Department of Ophthalmology, Eye and ENT Hospital, Fudan University, 83 Fenyang Rd., Shanghai 200031, China; Eye Institute, Eye and ENT Hospital, Fudan University, 83 Fenyang Rd., Shanghai 200031, China; Key Laboratory of Myopia, Ministry of Health, 83 Fenyang Rd., Shanghai 200031, China; Shanghai Key Laboratory of Visual Impairment and Restoration, 83 Fenyang Rd., Shanghai 200031, China
| | - Yi Lu
- Department of Ophthalmology, Eye and ENT Hospital, Fudan University, 83 Fenyang Rd., Shanghai 200031, China; Eye Institute, Eye and ENT Hospital, Fudan University, 83 Fenyang Rd., Shanghai 200031, China; Key Laboratory of Myopia, Ministry of Health, 83 Fenyang Rd., Shanghai 200031, China; Shanghai Key Laboratory of Visual Impairment and Restoration, 83 Fenyang Rd., Shanghai 200031, China.
| | - Tian-Yu Zheng
- Department of Ophthalmology, Eye and ENT Hospital, Fudan University, 83 Fenyang Rd., Shanghai 200031, China; Eye Institute, Eye and ENT Hospital, Fudan University, 83 Fenyang Rd., Shanghai 200031, China; Key Laboratory of Myopia, Ministry of Health, 83 Fenyang Rd., Shanghai 200031, China; Shanghai Key Laboratory of Visual Impairment and Restoration, 83 Fenyang Rd., Shanghai 200031, China.
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Lin H, Zhang X, Wang D, Liu J, Yuan L, Liu J, Wang C, Sun J, Chen J, Li H, Jing S. Anwulignan Ameliorates the Intestinal Ischemia/Reperfusion. J Pharmacol Exp Ther 2021; 378:222-234. [PMID: 34131018 DOI: 10.1124/jpet.121.000587] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 05/04/2021] [Indexed: 11/22/2022] Open
Abstract
Anwulignan is one of the monomer compounds in the lignans from Schisandra sphenanthera In this study, we observed the effect of anwulignan on intestinal ischemia/reperfusion (II/R) injury in male Sprague-Dawley rats and explored the underlying mechanisms. The results showed that pretreatment with oral anwulignan could significantly increase the mesenteric blood microcirculatory flow velocity; relieve the congestion and pathologic injury of jejunum; enhance the autonomic tension of jejunum smooth muscle and its reactivity to acetylcholine; increase the activities of superoxide dismutase, catalase, glutathione S-transferase, and choline acetyltransferase; increase the contents of acetylcholine and glutathione in the serum or jejunal tissue; decrease the activities of myeloperoxidase, protein kinase C, and nicotinamide adenine dinucleotide phosphate oxidase; reduce the contents of malondialdehyde, 8-hydroxy-2-deoxyguanosine, nicotinamide adenine, reactive oxygen species, tumor necrosis factor-α, interleukin (IL)-6, and IL-1β; increase the expression levels of muscarinic receptor 3, PI3K, phosphorylation protein kinase B, p-GSK3β Ser9, Nrf2, p-Nrf2, heme oxygenase (decycling) 1, and b-cell lymphoma 2 in the jejunal tissue; and decrease the expression levels of p-GSK3β Tyr216, kelch-like ECH-associated protein 1, Bax, and cleaved caspase-3, suggesting that anwulignan can ameliorate II/R-induced jejunal tissue injury in rats and that the mechanism may be related to its activating the PI3K/protein kinase B pathway and then regulating the Nrf2/Anti-oxidative Response Element signaling pathway and the expression of apoptosis-related proteins to play antioxidant and antiapoptotic roles. SIGNIFICANCE STATEMENT: Anwulignan can significantly reduce jejunal tissue injury and the production of inflammatory factors in rats with intestinal ischemia-reperfusion injury, improve the antioxidant capacity, and reduce the apoptosis of jejunal tissue, and it has the effect of significantly improving intestinal ischemia-reperfusion injury in rats, suggesting that anwulignan may be used as a potential drug for the prevention and treatment of intestinal ischemia-reperfusion injury or a resource for the development of health food.
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Affiliation(s)
- Huijiao Lin
- Department of Pharmacology, College of Pharmacy (Hu.L., X.Z., Jiaw.L., L.Y., C.W., J.S., J.C., He.L.); College of Basic Medicine (D.W.), Beihua University, Jilin City, China; Jilin City Central Hospital, Jilin City, China (Jial.L.); and Affiliated Hospital of Beihua University, Jilin City, China (S.J.)
| | - Xinyun Zhang
- Department of Pharmacology, College of Pharmacy (Hu.L., X.Z., Jiaw.L., L.Y., C.W., J.S., J.C., He.L.); College of Basic Medicine (D.W.), Beihua University, Jilin City, China; Jilin City Central Hospital, Jilin City, China (Jial.L.); and Affiliated Hospital of Beihua University, Jilin City, China (S.J.)
| | - Dan Wang
- Department of Pharmacology, College of Pharmacy (Hu.L., X.Z., Jiaw.L., L.Y., C.W., J.S., J.C., He.L.); College of Basic Medicine (D.W.), Beihua University, Jilin City, China; Jilin City Central Hospital, Jilin City, China (Jial.L.); and Affiliated Hospital of Beihua University, Jilin City, China (S.J.)
| | - Jiawei Liu
- Department of Pharmacology, College of Pharmacy (Hu.L., X.Z., Jiaw.L., L.Y., C.W., J.S., J.C., He.L.); College of Basic Medicine (D.W.), Beihua University, Jilin City, China; Jilin City Central Hospital, Jilin City, China (Jial.L.); and Affiliated Hospital of Beihua University, Jilin City, China (S.J.)
| | - Liwei Yuan
- Department of Pharmacology, College of Pharmacy (Hu.L., X.Z., Jiaw.L., L.Y., C.W., J.S., J.C., He.L.); College of Basic Medicine (D.W.), Beihua University, Jilin City, China; Jilin City Central Hospital, Jilin City, China (Jial.L.); and Affiliated Hospital of Beihua University, Jilin City, China (S.J.)
| | - Jiale Liu
- Department of Pharmacology, College of Pharmacy (Hu.L., X.Z., Jiaw.L., L.Y., C.W., J.S., J.C., He.L.); College of Basic Medicine (D.W.), Beihua University, Jilin City, China; Jilin City Central Hospital, Jilin City, China (Jial.L.); and Affiliated Hospital of Beihua University, Jilin City, China (S.J.)
| | - Chunmei Wang
- Department of Pharmacology, College of Pharmacy (Hu.L., X.Z., Jiaw.L., L.Y., C.W., J.S., J.C., He.L.); College of Basic Medicine (D.W.), Beihua University, Jilin City, China; Jilin City Central Hospital, Jilin City, China (Jial.L.); and Affiliated Hospital of Beihua University, Jilin City, China (S.J.)
| | - Jinghui Sun
- Department of Pharmacology, College of Pharmacy (Hu.L., X.Z., Jiaw.L., L.Y., C.W., J.S., J.C., He.L.); College of Basic Medicine (D.W.), Beihua University, Jilin City, China; Jilin City Central Hospital, Jilin City, China (Jial.L.); and Affiliated Hospital of Beihua University, Jilin City, China (S.J.)
| | - Jianguang Chen
- Department of Pharmacology, College of Pharmacy (Hu.L., X.Z., Jiaw.L., L.Y., C.W., J.S., J.C., He.L.); College of Basic Medicine (D.W.), Beihua University, Jilin City, China; Jilin City Central Hospital, Jilin City, China (Jial.L.); and Affiliated Hospital of Beihua University, Jilin City, China (S.J.)
| | - He Li
- Department of Pharmacology, College of Pharmacy (Hu.L., X.Z., Jiaw.L., L.Y., C.W., J.S., J.C., He.L.); College of Basic Medicine (D.W.), Beihua University, Jilin City, China; Jilin City Central Hospital, Jilin City, China (Jial.L.); and Affiliated Hospital of Beihua University, Jilin City, China (S.J.)
| | - Shu Jing
- Department of Pharmacology, College of Pharmacy (Hu.L., X.Z., Jiaw.L., L.Y., C.W., J.S., J.C., He.L.); College of Basic Medicine (D.W.), Beihua University, Jilin City, China; Jilin City Central Hospital, Jilin City, China (Jial.L.); and Affiliated Hospital of Beihua University, Jilin City, China (S.J.)
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Panieri E, Saso L. Inhibition of the NRF2/KEAP1 Axis: A Promising Therapeutic Strategy to Alter Redox Balance of Cancer Cells. Antioxid Redox Signal 2021; 34:1428-1483. [PMID: 33403898 DOI: 10.1089/ars.2020.8146] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Significance: The nuclear factor erythroid 2-related factor 2/Kelch-like ECH-associated protein 1 (NRF2/KEAP1) pathway is a crucial and highly conserved defensive system that is required to maintain or restore the intracellular homeostasis in response to oxidative, electrophilic, and other types of stress conditions. The tight control of NRF2 function is maintained by a complex network of biological interactions between positive and negative regulators that ultimately ensure context-specific activation, culminating in the NRF2-driven transcription of cytoprotective genes. Recent Advances: Recent studies indicate that deregulated NRF2 activation is a frequent event in malignant tumors, wherein it is associated with metabolic reprogramming, increased antioxidant capacity, chemoresistance, and poor clinical outcome. On the other hand, the growing interest in the modulation of the cancer cells' redox balance identified NRF2 as an ideal therapeutic target. Critical Issues: For this reason, many efforts have been made to identify potent and selective NRF2 inhibitors that might be used as single agents or adjuvants of anticancer drugs with redox disrupting properties. Despite the lack of specific NRF2 inhibitors still represents a major clinical hurdle, the researchers have exploited alternative strategies to disrupt NRF2 signaling at different levels of its biological activation. Future Directions: Given its dualistic role in tumor initiation and progression, the identification of the appropriate biological context of NRF2 activation and the specific clinicopathological features of patients cohorts wherein its inactivation is expected to have clinical benefits, will represent a major goal in the field of cancer research. In this review, we will briefly describe the structure and function of the NRF2/ KEAP1 system and some of the most promising NRF2 inhibitors, with a particular emphasis on natural compounds and drug repurposing. Antioxid. Redox Signal. 34, 1428-1483.
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Affiliation(s)
- Emiliano Panieri
- Department of Physiology and Pharmacology "Vittorio Erspamer," University of Rome La Sapienza, Rome, Italy
| | - Luciano Saso
- Department of Physiology and Pharmacology "Vittorio Erspamer," University of Rome La Sapienza, Rome, Italy
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12
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Song MY, Lee DY, Chun KS, Kim EH. The Role of NRF2/KEAP1 Signaling Pathway in Cancer Metabolism. Int J Mol Sci 2021; 22:4376. [PMID: 33922165 PMCID: PMC8122702 DOI: 10.3390/ijms22094376] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Revised: 04/14/2021] [Accepted: 04/20/2021] [Indexed: 12/17/2022] Open
Abstract
The nuclear factor-erythroid 2 p45-related factor 2 (NRF2, also called Nfe2l2) and its cytoplasmic repressor, Kelch-like ECH-associated protein 1 (KEAP1), are major regulators of redox homeostasis controlling a multiple of genes for detoxification and cytoprotective enzymes. The NRF2/KEAP1 pathway is a fundamental signaling cascade responsible for the resistance of metabolic, oxidative stress, inflammation, and anticancer effects. Interestingly, a recent accumulation of evidence has indicated that NRF2 exhibits an aberrant activation in cancer. Evidence has shown that the NRF2/KEAP1 signaling pathway is associated with the proliferation of cancer cells and tumerigenesis through metabolic reprogramming. In this review, we provide an overview of the regulatory molecular mechanism of the NRF2/KEAP1 pathway against metabolic reprogramming in cancer, suggesting that the regulation of NRF2/KEAP1 axis might approach as a novel therapeutic strategy for cancers.
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Affiliation(s)
- Moon-Young Song
- College of Pharmacy and Institute of Pharmaceutical Sciences, CHA University, Seongnam 13488, Korea; (M.-Y.S.); (D.-Y.L.)
| | - Da-Young Lee
- College of Pharmacy and Institute of Pharmaceutical Sciences, CHA University, Seongnam 13488, Korea; (M.-Y.S.); (D.-Y.L.)
| | - Kyung-Soo Chun
- College of Pharmacy, Keimyung University, Daegu 42601, Korea
| | - Eun-Hee Kim
- College of Pharmacy and Institute of Pharmaceutical Sciences, CHA University, Seongnam 13488, Korea; (M.-Y.S.); (D.-Y.L.)
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Abstract
Cells respond to stress by activating a variety of defense signaling pathways, including cell survival and cell death pathways. Although cell survival signaling helps the cell to recover from acute insults, cell death or senescence pathways induced by chronic insults can lead to unresolved pathologies. Arterial hypertension results from chronic physiological maladaptation against various stressors represented by abnormal circulating or local neurohormonal factors, mechanical stress, intracellular accumulation of toxic molecules, and dysfunctional organelles. Hypertension and aging share common mechanisms that mediate or prolong chronic cell stress, such as endoplasmic reticulum stress and accumulation of protein aggregates, oxidative stress, metabolic mitochondrial stress, DNA damage, stress-induced senescence, and proinflammatory processes. This review discusses common adaptive signaling mechanisms against these stresses including unfolded protein responses, antioxidant response element signaling, autophagy, mitophagy, and mitochondrial fission/fusion, STING (signaling effector stimulator of interferon genes)-mediated responses, and activation of pattern recognition receptors. The main molecular mechanisms by which the vasculature copes with hypertensive and aging stressors are presented and recent advancements in stress-adaptive signaling mechanisms as well as potential therapeutic targets are discussed.
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Affiliation(s)
- Stephanie M. Cicalese
- These authors contributed equally and are considered co-first authors
- Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA
| | - Josiane Fernandes da Silva
- These authors contributed equally and are considered co-first authors
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Fernanda Priviero
- These authors contributed equally and are considered co-first authors
- Cardiovascular Translational Research Center and Department of Cell Biology and Anatomy, University of South Carolina, Columbia, South Carolina, USA
| | - R. Clinton Webb
- Cardiovascular Translational Research Center and Department of Cell Biology and Anatomy, University of South Carolina, Columbia, South Carolina, USA
| | - Satoru Eguchi
- Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA
| | - Rita C. Tostes
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
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Aravind P, Bulbule SR, Hemalatha N, Babu R, Devaraju K. Elevation of gene expression of calcineurin, calmodulin and calsyntenin in oxidative stress induced PC12 cells. Genes Dis 2021; 8:87-93. [PMID: 33569517 PMCID: PMC7859428 DOI: 10.1016/j.gendis.2019.09.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Revised: 08/01/2019] [Accepted: 09/01/2019] [Indexed: 12/30/2022] Open
Abstract
In normal physiological conditions, reactive oxygen and nitrogen species are used as important signaling molecules in the cell. However, in excess it causes the disruption of cell resulting in their death. Oxidative stress causes influx in intracellular calcium levels leading to higher concentrations of calcium in the cell. This accelerated calcium affects both the mitochondria and nuclei leading to excitotoxicity in neurons. Intracellular calcium levels are controlled by voltage dependent calcium channels located in the plasma membrane, calcium stores like endoplasmic/sarcoplasmic reticulum and majorly by calcium binding proteins. Our study was aimed at analyzing the gene expression of major calcium binding proteins namely calcineurin, calmodulin, calreticulin, synaptotagamin and calsyntenin in stress induced PC 12 cells. Rotenone (1 μM), Peroxynitrite (10 μM), H2O2 (100 μM) and High glucose (33 mM) were used to induce oxidative stress in PC12 cells. Results obtained from the study suggest that calcineurin, calmodulin and calsyntenin gene expression were enhanced compared to the control due to oxidative stress. However, synaptotagmin and calreticulin gene expression were down regulated. Further, Akt protein expression (stress marker) was enhanced in PC12 cells with all other stress inducers except in hyperglycemic condition.
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Affiliation(s)
- P. Aravind
- Department of Biochemistry, Karnatak University, Pavate Nagar, Dharwad, 580 003, India
| | - Sarojini R. Bulbule
- Department of Biochemistry, Karnatak University, Pavate Nagar, Dharwad, 580 003, India
| | - N. Hemalatha
- Department of Biochemistry and Nutrition, CFTRI, V V Moholla, Mysore, 570 020, India
| | - R.L. Babu
- Department of Bioinformatics and Biotechnology, Akkamahadevi Women's University, Vijayapura, Karnataka, 586 108, India
| | - K.S. Devaraju
- Department of Biochemistry, Karnatak University, Pavate Nagar, Dharwad, 580 003, India
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15
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Abalenikhina YV, Kosmachevskaya OV, Topunov AF. Peroxynitrite: Toxic Agent and Signaling Molecule (Review). APPL BIOCHEM MICRO+ 2020. [DOI: 10.1134/s0003683820060022] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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16
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Protective Impact of Edaravone Against ZnO NPs-induced Oxidative Stress in the Human Neuroblastoma SH-SY5Y Cell Line. Cell Mol Neurobiol 2020; 42:1189-1210. [PMID: 33222098 DOI: 10.1007/s10571-020-01011-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Accepted: 11/13/2020] [Indexed: 10/22/2022]
Abstract
Extensive applications of ZnO NPs (zinc oxide nanoparticles) in daily life have created concern about their biotoxicity. Zinc oxide nanoparticles induce oxidative stress, inflammation, and apoptosis in neurons. Edaravone applies antioxidant agent and anti-inflammatory impacts in the different cells, as evaluated in both in vitro and in vivo experimental models. This study is designed to explore, how edaravone would avert mitochondrial impairment in human neuronal cells against ZnO NPs-induced toxicity. Accordingly, we analyzed here whether a pretreatment (for 24 h) with edaravone (10-100 μM) would enhance mitochondrial protection in the human neuroblastoma cells SH-SY5Y against ZnO NPs-induced toxicity. We found that edaravone at 25 μM averted the ZnO NPs-induced decrease in the amounts of adenosine triphosphate (ATP), just as on the activity of the complexes I and V. Also, edaravone induced an antioxidant activity by diminishing the levels of lipid peroxidation, protein carbonylation, and protein nitration in the mitochondrial membranes. Edaravone blocked the ZnO NPs-induced transcription factor nuclear factor-κB (NF-κB) upregulation. The inhibition of the heme oxygenase-1 (HO-1) enzyme by zinc protoporphyrin IX (ZnPP IX, 10 μM) smothered the preventive impacts brought about by edaravone with respect to mitochondrial function and inflammation. After this examination, it can be concluded that edaravone caused cytoprotective impacts in an HO-1-dependent manner in SH-SY5Y cells against ZnO NPs-induced toxicity.
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Godoy PRDV, Pour Khavari A, Rizzo M, Sakamoto-Hojo ET, Haghdoost S. Targeting NRF2, Regulator of Antioxidant System, to Sensitize Glioblastoma Neurosphere Cells to Radiation-Induced Oxidative Stress. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:2534643. [PMID: 32617133 PMCID: PMC7315280 DOI: 10.1155/2020/2534643] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 03/27/2020] [Accepted: 04/06/2020] [Indexed: 12/16/2022]
Abstract
The presence of glioma stem cells (GSCs), which are enriched in neurospheres, may be connected to the radioresistance of glioblastoma (GBM) due to their enhanced antioxidant defense and elevated DNA repair capacity. The aim was to evaluate the responses to different radiation qualities and to reduce radioresistance of U87MG cells, a GBM cell line. U87MG cells were cultured in a 3D model and irradiated with low (24 mGy/h) and high (0.39 Gy/min) dose rates of low LET gamma and high LET carbon ions (1-2 Gy/min). Thereafter, expression of proteins related to oxidative stress response, extracellular 8-oxo-dG, and neurospheres were determined. LD50 for carbon ions was significantly lower compared to LD50 of high and low dose rate gamma radiation. A significantly higher level of 8-oxo-dG was detected in the media of cells exposed to a low dose rate as compared to a high dose rate of gamma or carbon ions. A downregulation of oxidative stress proteins was also observed (NRF2, hMTH1, and SOD1). The NRF2 gene was knocked down by CRISPR/Cas9 in neurosphere cells, resulting in less self-renewal, more differentiated cells, and less proliferation capacity after irradiation with low and high dose rate gamma rays. Overall, U87MG glioma neurospheres presented differential responses to distinct radiation qualities and NRF2 plays an important role in cellular sensitivity to radiation.
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Affiliation(s)
- Paulo R. D. V. Godoy
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Svante Arrhenius Väg 20C, Zip Code: 106 91 Stockholm, Sweden
- Department of Biology, Faculty of Philosophy, Sciences and Letters at Ribeirão Preto, University of São Paulo, Av. Bandeirantes 3900, Zip Code: 14040-901 Ribeirão Preto, SP, Brazil
| | - Ali Pour Khavari
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Svante Arrhenius Väg 20C, Zip Code: 106 91 Stockholm, Sweden
| | - Marzia Rizzo
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Svante Arrhenius Väg 20C, Zip Code: 106 91 Stockholm, Sweden
| | - Elza T. Sakamoto-Hojo
- Department of Biology, Faculty of Philosophy, Sciences and Letters at Ribeirão Preto, University of São Paulo, Av. Bandeirantes 3900, Zip Code: 14040-901 Ribeirão Preto, SP, Brazil
- Department of Genetics, Faculty of Medicine of Ribeirão Preto, Av. Bandeirantes 3900, Zip Code: 14049-900 Ribeirão Preto, SP, Brazil
| | - Siamak Haghdoost
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Svante Arrhenius Väg 20C, Zip Code: 106 91 Stockholm, Sweden
- University of Caen Normandy, UMR6252 CIMAP/LARIA team, Zip Code: 14076 Caen, France
- Advanced Resource Center for HADrontherapy in Europe (ARCHADE), Zip Code: 14000 Caen, France
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18
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Gong X, Xu Y, Ren K, Bai X, Zhang C, Li M. Phenylethanoid glycosides from Paraboea martinii protect rat pheochromocytoma (PC12) cells from hydrogen peroxide-induced cell injury. Biosci Biotechnol Biochem 2019; 83:2202-2212. [PMID: 31409200 DOI: 10.1080/09168451.2019.1654359] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
ABSTRACT
In this study, we isolated eight phenylethanoid glycosides from Paraboea martinii for the first time, and evaluated the mechanism underlying their neuroprotective effects against H2O2-induced injury in PC12 cells. The MTS method was utilized to screen the phenylethanoid glycosides for protective ability. Next, qRT-PCR and western blotting analysis were used to detect the transcription levels of HO-1 and GCLC, which are regulated by Nrf2. The inhibitor ZnPP was used to analyze the involvement of Nrf2 in HO-1 expression. Analyses showed that caleolarioside B, paraboside B, and paraboside II also upregulated the expression of HO-1, but showed no obvious effect on GCLC. Pretreatment with ZnPP significantly reduced the neuroprotective effects. Thus, phenylethanoid glycosides isolated from P. martinii protected PC12 cells from H2O2-induced damage by upregulating HO-1. The results provided evidence that P. martinii might be a potential therapeutic agent for the treatment of neurodegenerative diseases.
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Affiliation(s)
- Xue Gong
- Department of Pharmacy, Baotou Medical College, Baotou, China
| | - Yan Xu
- Department of Emergency, The First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou, China
| | - Kai Ren
- Intensive Care Unit, Inner Mongolia Autonomous region Hospital of traditional Chinese Medicine, Hohhot, China
| | - Xiaorong Bai
- Department of Medicine, Xilinggol Vocational College, Inner Mongolia, China
| | - Chunhong Zhang
- Department of Pharmacy, Baotou Medical College, Baotou, China
| | - Minhui Li
- Department of Pharmacy, Baotou Medical College, Baotou, China
- Intensive Care Unit, Inner Mongolia Autonomous region Hospital of traditional Chinese Medicine, Hohhot, China
- Guangxi key Laboratory of Medicinal Resources Protection and Genetic Improvement, Guangxi Botanical Garden of Medicinal Plants, Nanning, China
- Pharmaceutical Laboratory, Inner Mongolia Institute of Traditional Chinese Medicine, Hohhot, China
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19
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Liu Q, Jin Z, Xu Z, Yang H, Li L, Li G, Li F, Gu S, Zong S, Zhou J, Cao L, Wang Z, Xiao W. Antioxidant effects of ginkgolides and bilobalide against cerebral ischemia injury by activating the Akt/Nrf2 pathway in vitro and in vivo. Cell Stress Chaperones 2019; 24:441-452. [PMID: 30815818 PMCID: PMC6439064 DOI: 10.1007/s12192-019-00977-1] [Citation(s) in RCA: 109] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 01/22/2019] [Accepted: 01/30/2019] [Indexed: 12/19/2022] Open
Abstract
Ginkgolide terpenoid lactones, including ginkgolides and bilobalide, are two crucial bioactive constituents of extract of Ginkgo biloba (EGb) which was used in the treatment of cardiovascular and cerebrovascular diseases. The aims of this study were to investigate the antioxidant effects and mechanism of ginkgolides (ginkgolide A (GA), ginkgolide B (GB), ginkgolide K (GK)) and bilobalide (BB) against oxidative stress induced by transient focal cerebral ischemia. In vitro, SH-SY5Y cells were exposed to oxygen-glucose deprivation (OGD) for 4 h followed by reoxygenation with ginkgolides and BB treatments for 6 h, and then cell viability, superoxide dismutase (SOD), and ROS were respectively detected using kit. Western blot was used to confirm the protein levels of hemeoxygenase-1 (HO-1), quinone oxidoreductase l (Nqo1), Akt, phosphorylated Akt (p-Akt), nuclear factor-E2-related factor2 (Nrf2), and phosphorylated Nrf2 (p-Nrf2). GB combined with different concentrations of LY294002 (PI3K inhibitor) were administrated to SH-SY5Y cells for 1 h after OGD, and then p-Akt and p-Nrf2 levels were detected by western blot. In vivo, 2 h of middle cerebral artery occlusion (MCAO) model was established, followed with reperfusion and GB treatments for 24 and 72 h. The infarct volume ratios were confirmed by TTC staining. The protein levels of HO-1, Nqo1, SOD1, Akt, p-Akt, Nrf2, and p-Nrf2 were detected using western blot and immunohistochemistry (IHC). Experimental data in vitro confirm that GA, GB, GK, and BB resulted in significant decrease of ROS and increase of SOD activities and protein levels of HO-1 and Nqo1; however, GB group had a significant advantage in comparison with the GA and GK groups. Moreover, after ginkgolides and BB treatments, p-Akt and p-Nrf2 were significantly upregulated, which could be inhibited by LY294002 in a dose-dependent manner, meanwhile, GB exhibited more effective than GA and GK. In vivo, TTC staining indicated that the infarct volume ratios in MCAO rats were dramatically decreased by GB in a dose-dependent manner. Furthermore, GB significantly upregulated the protein levels of HO-1, Nqo1, SOD, p-Akt, p-Nrf2, and Nrf2. In conclusion, GA, GB, GK, and BB significantly inhibited oxidative stress damage caused by cerebral ischemia reperfusion. Compared with GA, GK, and BB, GB exerts the strongest antioxidant stress effects against ischemic stroke. Moreover, ginkgolides and BB upregulated the levels of antioxidant proteins through mediating the Akt/Nrf2 signaling pathway to protect neurons from oxidative stress injury.
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Affiliation(s)
- Qiu Liu
- Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang, 222001, Jiangsu, China
- State Key Laboratory of New-tech for Chinese Medicine Pharmaceutical Process, Lianyungang, 222001, Jiangsu, China
| | - Zhiquan Jin
- Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang, 222001, Jiangsu, China
- State Key Laboratory of New-tech for Chinese Medicine Pharmaceutical Process, Lianyungang, 222001, Jiangsu, China
| | - Zhiliang Xu
- Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang, 222001, Jiangsu, China
- State Key Laboratory of New-tech for Chinese Medicine Pharmaceutical Process, Lianyungang, 222001, Jiangsu, China
| | - Hao Yang
- Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang, 222001, Jiangsu, China
- State Key Laboratory of New-tech for Chinese Medicine Pharmaceutical Process, Lianyungang, 222001, Jiangsu, China
| | - Liang Li
- Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang, 222001, Jiangsu, China
- State Key Laboratory of New-tech for Chinese Medicine Pharmaceutical Process, Lianyungang, 222001, Jiangsu, China
| | - Guiping Li
- Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang, 222001, Jiangsu, China
- State Key Laboratory of New-tech for Chinese Medicine Pharmaceutical Process, Lianyungang, 222001, Jiangsu, China
| | - Fang Li
- Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang, 222001, Jiangsu, China
- State Key Laboratory of New-tech for Chinese Medicine Pharmaceutical Process, Lianyungang, 222001, Jiangsu, China
| | - Shaoli Gu
- Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang, 222001, Jiangsu, China
- State Key Laboratory of New-tech for Chinese Medicine Pharmaceutical Process, Lianyungang, 222001, Jiangsu, China
| | - Shaobo Zong
- Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang, 222001, Jiangsu, China
- State Key Laboratory of New-tech for Chinese Medicine Pharmaceutical Process, Lianyungang, 222001, Jiangsu, China
| | - Jun Zhou
- Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang, 222001, Jiangsu, China
- State Key Laboratory of New-tech for Chinese Medicine Pharmaceutical Process, Lianyungang, 222001, Jiangsu, China
| | - Liang Cao
- Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang, 222001, Jiangsu, China
- State Key Laboratory of New-tech for Chinese Medicine Pharmaceutical Process, Lianyungang, 222001, Jiangsu, China
| | - Zhenzhong Wang
- Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang, 222001, Jiangsu, China
- State Key Laboratory of New-tech for Chinese Medicine Pharmaceutical Process, Lianyungang, 222001, Jiangsu, China
| | - Wei Xiao
- Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang, 222001, Jiangsu, China.
- State Key Laboratory of New-tech for Chinese Medicine Pharmaceutical Process, Lianyungang, 222001, Jiangsu, China.
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20
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Saidu NEB, Kavian N, Leroy K, Jacob C, Nicco C, Batteux F, Alexandre J. Dimethyl fumarate, a two-edged drug: Current status and future directions. Med Res Rev 2019; 39:1923-1952. [PMID: 30756407 DOI: 10.1002/med.21567] [Citation(s) in RCA: 90] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 01/22/2019] [Accepted: 01/24/2019] [Indexed: 12/11/2022]
Abstract
Dimethyl fumarate (DMF) is a fumaric acid ester registered for the treatment of relapsing-remitting multiple sclerosis (RRMS). It induces protein succination leading to inactivation of cysteine-rich proteins. It was first shown to possess cytoprotective and antioxidant effects in noncancer models, which appeared related to the induction of the nuclear factor erythroid 2 (NF-E2)-related factor 2 (NRF2) pathway. DMF also displays antitumor activity in several cellular and mice models. Recently, we showed that the anticancer mechanism of DMF is dose-dependent and is paradoxically related to the decrease in the nuclear translocation of NRF2. Some other studies performed indicate also the potential role of DMF in cancers, which are dependent on the NRF2 antioxidant and cellular detoxification program, such as KRAS-mutated lung adenocarcinoma. It, however, seems that DMF has multiple biological effects as it has been shown to also inhibit the transcription factor nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB), thus blocking downstream targets that may be involved in the development and progression of inflammatory cascades leading to various disease processes, including tumors, lymphomas, diabetic retinopathy, arthritis, and psoriasis. Herein, we present the current status and future directions of the use of DMF in various diseases models with particular emphases on its targeting of specific intracellular signal transduction cascades in cancer; to shed some light on its possible mode of action.
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Affiliation(s)
- Nathaniel Edward Bennett Saidu
- Department of Development, Reproduction and Cancer, Paris Descartes University, Sorbonne Paris Cité, INSERM U1016, Cochin Institute, CARPEM, Paris, France.,Division of Molecular Medicine, Institut Ruđer Bošković, Zagreb, Croatia
| | - Niloufar Kavian
- Department of Development, Reproduction and Cancer, Paris Descartes University, Sorbonne Paris Cité, INSERM U1016, Cochin Institute, CARPEM, Paris, France.,Department of Immunology, Cochin Hospital, AP-HP, Paris, France.,Division of Public Health Laboratory Sciences, HKU Pasteur Research Pole, University of Hong Kong, Hong Kong, SAR China
| | - Karen Leroy
- Department of Development, Reproduction and Cancer, Paris Descartes University, Sorbonne Paris Cité, INSERM U1016, Cochin Institute, CARPEM, Paris, France.,Department of Molecular Genetics, Cochin Hospital, AP-HP, Paris, France
| | - Claus Jacob
- Division of Bioorganic Chemistry, University of Saarland, Saarbruecken, Germany
| | - Carole Nicco
- Department of Development, Reproduction and Cancer, Paris Descartes University, Sorbonne Paris Cité, INSERM U1016, Cochin Institute, CARPEM, Paris, France
| | - Frédéric Batteux
- Department of Development, Reproduction and Cancer, Paris Descartes University, Sorbonne Paris Cité, INSERM U1016, Cochin Institute, CARPEM, Paris, France.,Department of Immunology, Cochin Hospital, AP-HP, Paris, France
| | - Jérôme Alexandre
- Department of Development, Reproduction and Cancer, Paris Descartes University, Sorbonne Paris Cité, INSERM U1016, Cochin Institute, CARPEM, Paris, France.,Department of Medical Oncology, Cochin Hospital, AP-HP, Paris, France
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21
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Chen H, Chen X, Luo Y, Shen J. Potential molecular targets of peroxynitrite in mediating blood–brain barrier damage and haemorrhagic transformation in acute ischaemic stroke with delayed tissue plasminogen activator treatment. Free Radic Res 2018; 52:1220-1239. [PMID: 30468092 DOI: 10.1080/10715762.2018.1521519] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Hansen Chen
- School of Chinese Medicine, the University of Hong Kong, PR China
- Shenzhen Institute of Research and Innovation (HKU-SIRI), University of Hong Kong, Hong Kong, PR China
| | - Xi Chen
- Department of Core Facility, the People’s Hospital of Bao-an Shenzhen, Shenzhen, PR China
- The 8th People’s Hospital of Shenzhen, the Affiliated Bao-an Hospital of Southern Medical University, Shenzhen, PR China
| | - Yunhao Luo
- School of Chinese Medicine, the University of Hong Kong, PR China
| | - Jiangang Shen
- School of Chinese Medicine, the University of Hong Kong, PR China
- Shenzhen Institute of Research and Innovation (HKU-SIRI), University of Hong Kong, Hong Kong, PR China
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22
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Yamamoto M, Kensler TW, Motohashi H. The KEAP1-NRF2 System: a Thiol-Based Sensor-Effector Apparatus for Maintaining Redox Homeostasis. Physiol Rev 2018; 98:1169-1203. [PMID: 29717933 PMCID: PMC9762786 DOI: 10.1152/physrev.00023.2017] [Citation(s) in RCA: 1040] [Impact Index Per Article: 173.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The Kelch-like ECH-associated protein 1-NF-E2-related factor 2 (KEAP1-NRF2) system forms the major node of cellular and organismal defense against oxidative and electrophilic stresses of both exogenous and endogenous origins. KEAP1 acts as a cysteine thiol-rich sensor of redox insults, whereas NRF2 is a transcription factor that robustly transduces chemical signals to regulate a battery of cytoprotective genes. KEAP1 represses NRF2 activity under quiescent conditions, whereas NRF2 is liberated from KEAP1-mediated repression on exposure to stresses. The rapid inducibility of a response based on a derepression mechanism is an important feature of the KEAP1-NRF2 system. Recent studies have unveiled the complexities of the functional contributions of the KEAP1-NRF2 system and defined its broader involvement in biological processes, including cell proliferation and differentiation, as well as cytoprotection. In this review, we describe historical milestones in the initial characterization of the KEAP1-NRF2 system and provide a comprehensive overview of the molecular mechanisms governing the functions of KEAP1 and NRF2, as well as their roles in physiology and pathology. We also refer to the clinical significance of the KEAP1-NRF2 system as an important prophylactic and therapeutic target for various diseases, particularly aging-related disorders. We believe that controlled harnessing of the KEAP1-NRF2 system is a key to healthy aging and well-being in humans.
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Wang T, Cheng J, Wang S, Wang X, Jiang H, Yang Y, Wang Y, Zhang C, Liang W, Feng H. α-Lipoic acid attenuates oxidative stress and neurotoxicity via the ERK/Akt-dependent pathway in the mutant hSOD1 related Drosophila model and the NSC34 cell line of amyotrophic lateral sclerosis. Brain Res Bull 2018; 140:299-310. [PMID: 29842900 DOI: 10.1016/j.brainresbull.2018.05.019] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Revised: 05/21/2018] [Accepted: 05/23/2018] [Indexed: 12/12/2022]
Abstract
Amyotrophic lateral sclerosis (ALS) is a degenerative disease with a progressive loss of motor neurons in the central nervous system (CNS). However, there are unsolved problems with the therapies for this disease. α-Lipoic acid (LA) is a natural, universal antioxidant capable of scavenging hydroxyl radicals as well as regenerating a series of antioxidant enzymes that has been widely used in clinical settings. This study aimed to evaluate the antioxidant and neuroprotective effects of LA in ALS cell and Drosophila models with mutant G85R and G93A hSOD1 genes. The biological effects of LA and the protein levels of several antioxidant factors were examined, as were those of phospho-Akt and phospho-ERK. Furthermore, specific inhibitors of the PI3K/Akt and MEK/ERK signaling pathways were used to analyze their effects on LA-induced antioxidant expression in vivo and in vitro. Evidences showed that the mutant hSOD1 resulted in the increased oxidative stress, abnormal antioxidant signaling and pathological behaviors in motor performance and survival compared with non-mutant hSOD1 models, treatment with LA improved motor activity and survival in transgenic flies, prevented NSC34 cells from mutant hSOD1 or H2O2 induced decreased antioxidant enzymes as well as increased ROS levels. In addition, LA regulated the expression levels of antioxidant proteins in a dose- and periodical time-dependent manner, which might be mediated by ERK/Akt pathway activation and independent from the mutant hSOD1 gene. Our observations suggest that LA exerts strong and positive antioxidant and neuroprotective effects through the activation of the ERK-Akt pathway in hSOD1 ALS models.
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Affiliation(s)
- Tianhang Wang
- Department of Neurology, the First Affiliated Hospital of Harbin Medical University, Harbin 150001, PR China
| | - Jiling Cheng
- Department of Neurology, the First Affiliated Hospital of Harbin Medical University, Harbin 150001, PR China
| | - Shuyu Wang
- Department of Neurology, the First Affiliated Hospital of Harbin Medical University, Harbin 150001, PR China
| | - Xudong Wang
- Department of Neurology, the First Affiliated Hospital of Harbin Medical University, Harbin 150001, PR China
| | - Hongquan Jiang
- Department of Neurology, the First Affiliated Hospital of Harbin Medical University, Harbin 150001, PR China
| | - Yueqing Yang
- Department of Neurology, the First Affiliated Hospital of Harbin Medical University, Harbin 150001, PR China
| | - Ying Wang
- Department of Neurology, the First Affiliated Hospital of Harbin Medical University, Harbin 150001, PR China
| | - Chunting Zhang
- Department of Neurology, the First Affiliated Hospital of Harbin Medical University, Harbin 150001, PR China
| | - Weiwei Liang
- Department of Neurology, the Second Affiliated Hospital of Harbin Medical University, Harbin 150001, PR China
| | - Honglin Feng
- Department of Neurology, the First Affiliated Hospital of Harbin Medical University, Harbin 150001, PR China.
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UVA Irradiation Enhances Brusatol-Mediated Inhibition of Melanoma Growth by Downregulation of the Nrf2-Mediated Antioxidant Response. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:9742154. [PMID: 29670684 PMCID: PMC5835260 DOI: 10.1155/2018/9742154] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 11/09/2017] [Accepted: 11/27/2017] [Indexed: 12/30/2022]
Abstract
Brusatol (BR) is a potent inhibitor of Nrf2, a transcription factor that is highly expressed in cancer tissues and confers chemoresistance. UVA-generated reactive oxygen species (ROS) can damage both normal and cancer cells and may be of potential use in phototherapy. In order to provide an alternative method to treat the aggressive melanoma, we sought to investigate whether low-dose UVA with BR is more effective in eliminating melanoma cells than the respective single treatments. We found that BR combined with UVA led to inhibition of A375 melanoma cell proliferation by cell cycle arrest in the G1 phase and triggers cell apoptosis. Furthermore, inhibition of Nrf2 expression attenuated colony formation and tumor development from A375 cells in heterotopic mouse models. In addition, cotreatment of UVA and BR partially suppressed Nrf2 and its downstream target genes such as HO-1 along with the PI3K/AKT pathway. We propose that cotreatment increased ROS-induced cell cycle arrest and cellular apoptosis and inhibits melanoma growth by regulating the AKT-Nrf2 pathway in A375 cells which offers a possible therapeutic intervention strategy for the treatment of human melanoma.
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Pan W, Miao L, Lin Y, Huang X, Ge X, Moosa SL, Liu B, Ren M, Zhou Q, Liang H, Zhang W, Pan L. Regulation mechanism of oxidative stress induced by high glucose through PI3K/Akt/Nrf2 pathway in juvenile blunt snout bream (Megalobrama amblycephala). FISH & SHELLFISH IMMUNOLOGY 2017; 70:66-75. [PMID: 28882793 DOI: 10.1016/j.fsi.2017.09.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 08/23/2017] [Accepted: 09/01/2017] [Indexed: 06/07/2023]
Abstract
This study was conducted to investigate the effects of oral administration of a high concentration of glucose on the respiratory burst, antioxidant status, and hepatic gene expression of heme oxygenase-1 (ho1) and PI3K/Akt/Nrf2-related signaling molecules in juvenile blunt snout bream (Megalobrama amblycephala). Blunt snout bream juveniles with an initial body weight of 19.94 ± 0.58 g were orally fed with a high concentration of glucose (3 g/kg body weight). The results indicated that plasma glucose exhibited a biphasic response. Acute and persistent hyperglycemia due to the oral glucose administration significantly reduced (P < 0.05) the white blood cell count, red blood cell count, and hemoglobin content and caused oxidative stress (significantly increased alanine aminotransferase, aspartate transaminase, alkaline phosphatase, and glucose levels) and early apoptosis of hepatocytes in the fish. Hepatic superoxide dismutase, catalase, glutathione peroxidase, and glutathione reductase activities increased rapidly (P < 0.05) as protection from oxidative stress and were downregulated (P < 0.05) because of persistent hyperglycemia. Blood respiratory burst was significantly reduced (P < 0.05) because of hyperglycemia and showed a trend that was opposite to that of plasma glucose. Slight upregulation of nrf2 mRNA and antioxidants acts as a compensative protection mechanism, and the downregulated PI3K/Akt pathway blocked this function of Nrf2. In conclusion, the PI3K/Akt pathway and Nrf2 mediated the antioxidative mechanism independently in the blunt snout bream juveniles subjected to the oral administration of a high glucose concentration.
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Affiliation(s)
- Wenjing Pan
- Wuxi Fisheries College, Nanjing Agricultural University, 9 Shanshui East Road, Wuxi, Jiangsu 214081, PR China
| | - Linghong Miao
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center (FFRC), Chinese Academy of Fishery Sciences (CAFS), 9 Shanshui East Road, Wuxi, Jiangsu 214081, PR China
| | - Yan Lin
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center (FFRC), Chinese Academy of Fishery Sciences (CAFS), 9 Shanshui East Road, Wuxi, Jiangsu 214081, PR China
| | - Xin Huang
- Wuxi Fisheries College, Nanjing Agricultural University, 9 Shanshui East Road, Wuxi, Jiangsu 214081, PR China
| | - Xianping Ge
- Wuxi Fisheries College, Nanjing Agricultural University, 9 Shanshui East Road, Wuxi, Jiangsu 214081, PR China; Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center (FFRC), Chinese Academy of Fishery Sciences (CAFS), 9 Shanshui East Road, Wuxi, Jiangsu 214081, PR China.
| | - Silli Laban Moosa
- Wuxi Fisheries College, Nanjing Agricultural University, 9 Shanshui East Road, Wuxi, Jiangsu 214081, PR China
| | - Bo Liu
- Wuxi Fisheries College, Nanjing Agricultural University, 9 Shanshui East Road, Wuxi, Jiangsu 214081, PR China; Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center (FFRC), Chinese Academy of Fishery Sciences (CAFS), 9 Shanshui East Road, Wuxi, Jiangsu 214081, PR China
| | - Mingchun Ren
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center (FFRC), Chinese Academy of Fishery Sciences (CAFS), 9 Shanshui East Road, Wuxi, Jiangsu 214081, PR China
| | - Qunlan Zhou
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center (FFRC), Chinese Academy of Fishery Sciences (CAFS), 9 Shanshui East Road, Wuxi, Jiangsu 214081, PR China
| | - Hualiang Liang
- Wuxi Fisheries College, Nanjing Agricultural University, 9 Shanshui East Road, Wuxi, Jiangsu 214081, PR China
| | - Wuxiao Zhang
- Wuxi Fisheries College, Nanjing Agricultural University, 9 Shanshui East Road, Wuxi, Jiangsu 214081, PR China
| | - Liangkun Pan
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center (FFRC), Chinese Academy of Fishery Sciences (CAFS), 9 Shanshui East Road, Wuxi, Jiangsu 214081, PR China
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Jung HA, Abdul QA, Byun JS, Joung EJ, Gwon WG, Lee MS, Kim HR, Choi JS. Protective effects of flavonoids isolated from Korean milk thistle Cirsium japonicum var. maackii (Maxim.) Matsum on tert-butyl hydroperoxide-induced hepatotoxicity in HepG2 cells. JOURNAL OF ETHNOPHARMACOLOGY 2017; 209:62-72. [PMID: 28735729 DOI: 10.1016/j.jep.2017.07.027] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 06/22/2017] [Accepted: 07/17/2017] [Indexed: 06/07/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Milk thistle leaves and flowers have been traditionally used as herbal remedy to alleviate liver diseases for decades. Korean milk thistle, Cirsium japonicum var. maackii (Maxim.) Matsum has been employed in traditional folk medicine as diuretic, antiphlogistic, hemostatic, and detoxifying agents. AIM OF THE STUDY The aim of current investigation was to evaluate hepatoprotective properties of the MeOH extract of the roots, stems, leaves and flowers of Korean milk thistle as well as four isolated flavonoids, luteolin, luteolin 5-O-glucoside, apigenin and apigenin 7-O-glucuronide during t-BHP-induced oxidative stress in HepG2 cells. MATERIALS AND METHODS Hepatoprotective potential of the MeOH extracts and flavonoids derived from Korean milk thistle against t-BHP-induced oxidative stress in HepG2 cells were evaluated following MTT method. Incubating HepG2 cells with t-BHP markedly decreased the cell viability and increased the intracellular ROS generation accompanied by depleted GSH levels. Protein expression of heme oxygenase (HO-1) and nuclear factor-E2-related factor 2 (Nrf-2) was determined by Western blot. RESULTS Our findings revealed that pretreating HepG2 cells with MeOH extracts and bioactive flavonoids significantly attenuated the t-BHP-induced oxidative damage, followed by increased cell viability in a dose-dependent manner. The results illustrate that excess ROS generation was reduced and GSH levels increased dose-dependently when HepG2 cells were pretreated with four flavonoids. Moreover, Western blotting analysis demonstrated that protein expressions of Nrf-2 and HO-1 were also up-regulated by flavonoids treatment. CONCLUSIONS These results clearly demonstrate that the MeOH extracts and flavonoids from Korean milk thistle protected HepG2 cells against oxidative damage triggered by t-BHP principally by modulating ROS generation and restoring depleted GSH levels in addition to the increased Nrf-2/HO-1 signaling cascade. These flavonoids are potential natural antioxidative biomarkers against oxidative stress-induced hepatotoxicity.
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Affiliation(s)
- Hyun Ah Jung
- Department of Food Science and Human Nutrition, Chonbuk National University, Jeonju 54896, Republic of Korea
| | - Qudeer Ahmed Abdul
- Department of Food and Life Science, Pukyong National University, Busan 48513, Republic of Korea
| | - Jeong Su Byun
- Department of Food and Life Science, Pukyong National University, Busan 48513, Republic of Korea
| | - Eun-Ji Joung
- Department of Food and Life Science, Pukyong National University, Busan 48513, Republic of Korea
| | - Wi-Gyeong Gwon
- Department of Food and Life Science, Pukyong National University, Busan 48513, Republic of Korea
| | - Min-Sup Lee
- Department of Food and Life Science, Pukyong National University, Busan 48513, Republic of Korea
| | - Hyeung-Rak Kim
- Department of Food and Life Science, Pukyong National University, Busan 48513, Republic of Korea
| | - Jae Sue Choi
- Department of Food and Life Science, Pukyong National University, Busan 48513, Republic of Korea.
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Karathedath S, Rajamani BM, Musheer Aalam SM, Abraham A, Varatharajan S, Krishnamurthy P, Mathews V, Velayudhan SR, Balasubramanian P. Role of NF-E2 related factor 2 (Nrf2) on chemotherapy resistance in acute myeloid leukemia (AML) and the effect of pharmacological inhibition of Nrf2. PLoS One 2017; 12:e0177227. [PMID: 28505160 PMCID: PMC5432104 DOI: 10.1371/journal.pone.0177227] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 04/24/2017] [Indexed: 12/30/2022] Open
Abstract
Cytarabine (Ara-C) and Daunorubicin (Dnr) forms the backbone of acute myeloid leukemia (AML) therapy. Drug resistance and toxic side effects pose a major threat to treatment success and hence alternate less toxic therapies are warranted. NF-E2 related factor-2 (Nrf2), a master regulator of antioxidant response is implicated in chemoresistance in solid tumors. However, little is known about the role of Nrf2 in AML chemoresistance and the effect of pharmacological inhibitor brusatol in modulating this resistance. Primary AML samples with high ex-vivo IC50 to Ara-C, ATO, Dnr had significantly high NRF2 RNA expression. Gene-specific knockdown of NRF2 improved sensitivity to these drugs in resistant AML cell lines by decreasing the expression of downstream antioxidant targets of Nrf2 by compromising the cell’s ability to scavenge the ROS. Treatment with brusatol, a pharmacological inhibitor of Nrf2, improved sensitivity to Ara-C, ATO, and Dnr and reduced colony formation capacity. AML cell lines stably overexpressing NRF2 showed increased resistance to ATO, Dnr and Ara-C and increased expression of downstream targets. This study demonstrates that Nrf2 could be an ideal druggable target in AML, more so to the drugs that function through ROS, suggesting the possibility of using Nrf2 inhibitors in combination with chemotherapeutic agents to modulate drug resistance in AML.
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Affiliation(s)
| | | | | | - Ajay Abraham
- Department of Haematology, Christian Medical College, Vellore, India
| | | | - Partha Krishnamurthy
- Department of Pharmacology, Toxicology and Therapeutics, Kansas University Medical Centre, Kansas City, Kansas, United States of America
| | - Vikram Mathews
- Department of Haematology, Christian Medical College, Vellore, India
| | - Shaji Ramachandran Velayudhan
- Department of Haematology, Christian Medical College, Vellore, India
- Centre for Stem Cell Research, Christian Medical College, Vellore, India
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Lin CC, Yang CC, Chen YW, Hsiao LD, Yang CM. Arachidonic Acid Induces ARE/Nrf2-Dependent Heme Oxygenase-1 Transcription in Rat Brain Astrocytes. Mol Neurobiol 2017; 55:3328-3343. [PMID: 28497199 DOI: 10.1007/s12035-017-0590-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 04/28/2017] [Indexed: 12/21/2022]
Abstract
Arachidonic acid (AA) is a major product of phospholipid hydrolysis catalyzed by phospholipase A2 during neurodegenerative diseases. AA exerts as a second messenger to regulate various signaling components which may be involved in different pathophysiological processes. Astrocytes are the main types of CNS resident cells which maintain and support the physiological function of brain. AA has been shown to induce ROS generation through activation of NADPH oxidases (Noxs) which may play a key role in the expression of heme oxygenase-1 (HO-1). Therefore, this study was designed to investigate the mechanisms underlying AA-induced HO-1 expression in rat brain astrocytes (RBA-1). We found that AA induced HO-1 protein and mRNA expression and promoter activity in RBA-1, which was mediated through the synthesis of 15-deoxy-Δ12,14-prostaglandin D2-activated peroxisome proliferator-activated receptor-γ (PPARγ) receptors. This note was confirmed by transfection with PPARγ small interfering RNAs (siRNA) which attenuated the AA-mediated responses. AA-induced HO-1 expression was mediated through Nox/ROS generation, which was inhibited by Nox inhibitors (diphenyleneiodonium and apocynin) and ROS scavengers (N-acetyl cysteine). Moreover, AA-induced HO-1 expression was mediated through phosphorylation of Src, Pyk2, platelet-derived growth factor, PI3K/Akt, and ERK1/2 which were inhibited by the pharmacological inhibitors including PP1, PF431396, AG1296, LY294002, and U0126 or by transfection with respective siRNAs. AA-enhanced Nrf2 expression and HO-1 promoter activity was inhibited by transfection with Nrf2 siRNA or by these pharmacological inhibitors. Furthermore, chromatin immunoprecipitation assay confirmed that Nrf2 and PPARγ were associated with the proximal antioxidant response element (ARE)-binding site on HO-1 promoter, suggesting that Nrf2/PPARγ are key transcription factors modulating HO-1 expression. AA-induced ARE promoter activity was also reduced by these pharmacological inhibitors. These findings suggested that AA increases formation of Nrf2 and PPARγ complex and binding with ARE1 binding site through Src, Pyk2, PI3K/Akt, and ERK1/2, which further induced HO-1 expression in RBA-1 cells.
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Affiliation(s)
- Chih-Chung Lin
- Department of Anesthetics, Chang Gung Memorial Hospital at Linkou, and College of Medicine, Chang Gung University, Kwei-San, Tao-Yuan, Taiwan
| | - Chien-Chung Yang
- Department of Traditional Chinese Medicine, Chang Gung Memorial Hospital, Linkou, Kwei-San, Tao-Yuan, Taiwan.,Department of Physiology and Pharmacology and Health Aging Research Center, College of Medicine, Chang Gung University, Kwei-San, Tao-Yuan, Taiwan
| | - Yu-Wen Chen
- Department of Physiology and Pharmacology and Health Aging Research Center, College of Medicine, Chang Gung University, Kwei-San, Tao-Yuan, Taiwan
| | - Li-Der Hsiao
- Department of Anesthetics, Chang Gung Memorial Hospital at Linkou, and College of Medicine, Chang Gung University, Kwei-San, Tao-Yuan, Taiwan
| | - Chuen-Mao Yang
- Department of Anesthetics, Chang Gung Memorial Hospital at Linkou, and College of Medicine, Chang Gung University, Kwei-San, Tao-Yuan, Taiwan. .,Department of Physiology and Pharmacology and Health Aging Research Center, College of Medicine, Chang Gung University, Kwei-San, Tao-Yuan, Taiwan. .,Research Center for Industry of Human Ecology, Research Center for Chinese Herbal Medicine, and Graduate Institute of Health Industry Technology, Chang Gung University of Science and Technology, Tao-Yuan, Taiwan. .,Department of Physiology and Pharmacology, Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan, Tao-Yuan, Taiwan.
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More SV, Choi DK. Atractylenolide-I Protects Human SH-SY5Y Cells from 1-Methyl-4-Phenylpyridinium-Induced Apoptotic Cell Death. Int J Mol Sci 2017; 18:E1012. [PMID: 28481321 PMCID: PMC5454925 DOI: 10.3390/ijms18051012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 04/21/2017] [Accepted: 05/03/2017] [Indexed: 12/16/2022] Open
Abstract
Oxidative stress and apoptosis are the major mechanisms that induce dopaminergic cell death. Our study investigates the protective effects of atractylenolide-I (ATR-I) on 1-methyl-4-phenylpyridinium (MPP⁺)-induced cytotoxicity in human dopaminergic SH-SY5Y cells, as well as its underlying mechanism. Our experimental data indicates that ATR-I significantly inhibits the loss of cell viability induced by MPP⁺ in SH-SY5Y cells. To further unravel the mechanism, we examined the effect of ATR-I on MPP⁺-induced apoptotic cell death characterized by an increase in the Bax/Bcl-2 mRNA ratio, the release of cytochrome-c, and the activation of caspase-3 leading to elevated levels of cleaved poly(ADP-ribose) polymerase (PARP) resulting in SH-SY5Y cell death. Our results demonstrated that ATR-I decreases the level of pro-apoptotic proteins induced by MPP⁺ and also restored Bax/Bcl-2 mRNA levels, which are critical for inducing apoptosis. In addition, ATR-I demonstrated a significant increase in the protein expression of heme-oxygenase in MPP⁺-treated SH-SY5Y cells. These results suggest that the pharmacological effect of ATR-I may be, at least in part, caused by the reduction in pro-apoptotic signals and also by induction of anti-oxidant protein.
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Affiliation(s)
- Sandeep Vasant More
- Department of Biotechnology, College of Biomedical and Health Science, Konkuk University, Chungju 380-701, Korea.
| | - Dong-Kug Choi
- Department of Biotechnology, College of Biomedical and Health Science, Konkuk University, Chungju 380-701, Korea.
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Neuroprotective Role of Atractylenolide-I in an In Vitro and In Vivo Model of Parkinson's Disease. Nutrients 2017; 9:nu9050451. [PMID: 28468332 PMCID: PMC5452181 DOI: 10.3390/nu9050451] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 02/24/2017] [Accepted: 03/20/2017] [Indexed: 12/23/2022] Open
Abstract
Parkinson’s disease (PD) is an age-related neurological disorder characterized by a loss of dopaminergic neurons within the midbrain. Neuroinflammation has been nominated as one of the key pathogenic features of PD. Recently, the inadequate pharmacotherapy and adverse effects of conventional drugs have spurred the development of unconventional medications in the treatment of PD. The purpose of this study is to investigate the anti-neuroinflammatory mechanisms of Atractylenolide-I (ATR-I) in in vivo and in vitro models of PD. Nitrite assay was measured via Griess reaction in lipopolysaccharide (LPS) stimulated BV-2 cells. mRNA and protein levels were determined by a reverse transcription-polymerase chain reaction (RT-PCR) and immunoblot analysis, respectively. Further, flow cytometry, immunocytochemistry, and immunohistochemistry were employed in BV-2 cells and MPTP-intoxicated C57BL6/J mice. Pre-treatment with ATR-I attenuated the inflammatory response in BV-2 cells by abating the nuclear translocation of nuclear factor-κB (NF-κB) and by inducing heme oxygenase-1 (HO-1). The intraperitoneal administration of ATR-I reversed MPTP-induced behavioral deficits, decreased microglial activation, and conferred protection to dopaminergic neurons in the mouse model of PD. Our experimental reports establish the involvement of multiple benevolent molecular events by ATR-I in MPTP-induced toxicity, which may aid in the development of ATR-I as a new therapeutic agent for the treatment of PD.
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Lenoir O, Gaillard F, Lazareth H, Robin B, Tharaux PL. Hmox1 Deficiency Sensitizes Mice to Peroxynitrite Formation and Diabetic Glomerular Microvascular Injuries. J Diabetes Res 2017; 2017:9603924. [PMID: 29359167 PMCID: PMC5735626 DOI: 10.1155/2017/9603924] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 09/06/2017] [Accepted: 10/08/2017] [Indexed: 12/30/2022] Open
Abstract
OBJECTIVE Indirect evidence suggests a role for heme oxygenase-1 (HO-1) in limiting diabetic vasculopathy. The goal of this study was to assess the role of HO-1 in the development of microvascular lesions within glomeruli during diabetes mellitus using a mouse model with specific alteration of the Hmox1 gene. APPROACH AND RESULTS The effects of Hmox1 haploinsufficiency were studied as a means of assessing the intrinsic contribution of HO-1 in the development of renal microvascular lesions during diabetes. Renal function and histology were analyzed 10 weeks after diabetes induction with streptozotocin. Diabetic Hmox1+/- mice showed higher levels of albuminuria and blood urea compared to their wild-type diabetic littermates. More severe glomerular microvascular lesions were also observed in the diabetic Hmox1+/- mice. This was associated with a renal increase in the expression of the oxidative stress marker, nitrotyrosine. CONCLUSIONS Genetic Hmox1 partial deficiency is sufficient to sensitize mice to the development of diabetic glomerular microvascular lesions. HO-1 exerts antioxidant effects in the kidney during diabetes mellitus. These have protective effects on the development of glomerular endothelial injury.
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Affiliation(s)
- Olivia Lenoir
- Paris Cardiovascular Centre (PARCC), Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - François Gaillard
- Paris Cardiovascular Centre (PARCC), Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Hélène Lazareth
- Paris Cardiovascular Centre (PARCC), Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Blaise Robin
- Paris Cardiovascular Centre (PARCC), Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Pierre-Louis Tharaux
- Paris Cardiovascular Centre (PARCC), Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
- Nephrology Division, Georges Pompidou European Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
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32
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Palliyaguru DL, Chartoumpekis DV, Wakabayashi N, Skoko JJ, Yagishita Y, Singh SV, Kensler TW. Withaferin A induces Nrf2-dependent protection against liver injury: Role of Keap1-independent mechanisms. Free Radic Biol Med 2016; 101:116-128. [PMID: 27717869 PMCID: PMC5154810 DOI: 10.1016/j.freeradbiomed.2016.10.003] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 09/28/2016] [Accepted: 10/02/2016] [Indexed: 12/30/2022]
Abstract
Small molecules of plant origin offer presumptively safe opportunities to prevent carcinogenesis, mutagenesis and other forms of toxicity in humans. However, the mechanisms of action of such plant-based agents remain largely unknown. In recent years the stress responsive transcription factor Nrf2 has been validated as a target for disease chemoprevention. Withania somnifera (WS) is a herb used in Ayurveda (an ancient form of medicine in South Asia). In the recent past, withanolides isolated from WS, such as Withaferin A (WA) have been demonstrated to be preventive and therapeutic against multiple diseases in experimental models. The goals of this study are to evaluate withanolides such as WA as well as Withania somnifera root extract as inducers of Nrf2 signaling, to probe the underlying signaling mechanism of WA and to determine whether prevention of acetaminophen (APAP)-induced hepatic toxicity in mice by WA occurs in an Nrf2-dependent manner. We observed that WA profoundly protects wild-type mice but not Nrf2-disrupted mice against APAP hepatotoxicity. WA is a potent inducer of Nrf2-dependent cytoprotective enzyme expression both in vivo and in vitro. Unexpectedly, WA induces Nrf2 signaling at least in part, in a Keap1-independent, Pten/Pi3k/Akt-dependent manner in comparison to prototypical Nrf2 inducers, sulforaphane and CDDO-Im. The identification of WA as an Nrf2 inducer that can signal through a non-canonical, Keap1-independent pathway provides an opportunity to evaluate the role of other regulatory partners of Nrf2 in the dietary and pharmacological induction of Nrf2-mediated cytoprotection.
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Affiliation(s)
- Dushani L Palliyaguru
- Department of Environmental and Occupational Health, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Dionysios V Chartoumpekis
- Department of Pharmacology and Chemical Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Nobunao Wakabayashi
- Department of Pharmacology and Chemical Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - John J Skoko
- Department of Pharmacology and Chemical Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Yoko Yagishita
- Department of Pharmacology and Chemical Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Shivendra V Singh
- Department of Pharmacology and Chemical Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Thomas W Kensler
- Department of Environmental and Occupational Health, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA; Department of Pharmacology and Chemical Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA.
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Zhang R, Xu M, Wang Y, Xie F, Zhang G, Qin X. Nrf2—a Promising Therapeutic Target for Defensing Against Oxidative Stress in Stroke. Mol Neurobiol 2016; 54:6006-6017. [DOI: 10.1007/s12035-016-0111-0] [Citation(s) in RCA: 129] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 09/06/2016] [Indexed: 12/30/2022]
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Yang B, Zhao Y, Lou C, Zhao H. Eupalinolide O, a novel sesquiterpene lactone from Eupatorium lindleyanum DC., induces cell cycle arrest and apoptosis in human MDA-MB-468 breast cancer cells. Oncol Rep 2016; 36:2807-2813. [DOI: 10.3892/or.2016.5115] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 05/17/2016] [Indexed: 11/05/2022] Open
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Grottelli S, Ferrari I, Pietrini G, Peirce MJ, Minelli A, Bellezza I. The Role of Cyclo(His-Pro) in Neurodegeneration. Int J Mol Sci 2016; 17:E1332. [PMID: 27529240 PMCID: PMC5000729 DOI: 10.3390/ijms17081332] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 08/04/2016] [Accepted: 08/08/2016] [Indexed: 02/06/2023] Open
Abstract
Neurodegenerative diseases may have distinct genetic etiologies and pathological manifestations, yet share common cellular mechanisms underpinning neuronal damage and dysfunction. These cellular mechanisms include excitotoxicity, calcium dysregulation, oxidative damage, ER stress and neuroinflammation. Recent data have identified a dual role in these events for glial cells, such as microglia and astrocytes, which are able both to induce and to protect against damage induced by diverse stresses. Cyclo(His-Pro), a cyclic dipeptide derived from the hydrolytic removal of the amino-terminal pyroglutamic acid residue of the hypothalamic thyrotropin-releasing hormone, may be important in regulating the nature of the glial cell contribution. Cyclo(His-Pro) is ubiquitous in the central nervous system and is a key substrate of organic cation transporters, which are strongly linked to neuroprotection. The cyclic dipeptide can also cross the brain-blood-barrier and, once in the brain, can affect diverse inflammatory and stress responses by modifying the Nrf2-NF-κB signaling axis. For these reasons, cyclo(His-Pro) has striking potential for therapeutic application by both parenteral and oral administration routes and may represent an important new tool in counteracting neuroinflammation-based degenerative pathologies. In this review, we discuss the chemistry and biology of cyclo(His-Pro), how it may interact with the biological mechanisms driving neurodegenerative disease, such as amyotrophic lateral sclerosis, and thereby act to preserve or restore neuronal function.
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Affiliation(s)
- Silvia Grottelli
- Dipartimento di Medicina Sperimentale, Università di Perugia, Polo Unico Sant'Andrea delle Fratte, Piazzale Gambuli, 06132 Perugia, Italy.
| | - Ilaria Ferrari
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano ed Istituto di Neuroscienze, Consiglio Nazionale delle Ricerche, Via Vanvitelli 32, 20129 Milano, Italy.
| | - Grazia Pietrini
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano ed Istituto di Neuroscienze, Consiglio Nazionale delle Ricerche, Via Vanvitelli 32, 20129 Milano, Italy.
| | - Matthew J Peirce
- Dipartimento di Medicina Sperimentale, Università di Perugia, Polo Unico Sant'Andrea delle Fratte, Piazzale Gambuli, 06132 Perugia, Italy.
| | - Alba Minelli
- Dipartimento di Medicina Sperimentale, Università di Perugia, Polo Unico Sant'Andrea delle Fratte, Piazzale Gambuli, 06132 Perugia, Italy.
| | - Ilaria Bellezza
- Dipartimento di Medicina Sperimentale, Università di Perugia, Polo Unico Sant'Andrea delle Fratte, Piazzale Gambuli, 06132 Perugia, Italy.
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Li H, Sun JJ, Chen GY, Wang WW, Xie ZT, Tang GF, Wei SD. Carnosic acid nanoparticles suppress liver ischemia/reperfusion injury by inhibition of ROS, Caspases and NF-κB signaling pathway in mice. Biomed Pharmacother 2016; 82:237-46. [PMID: 27470360 DOI: 10.1016/j.biopha.2016.04.064] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Revised: 04/29/2016] [Accepted: 04/29/2016] [Indexed: 12/30/2022] Open
Abstract
Living donor liver transplantation (LDLT) requires ischemia/reperfusion (I/R), which can lead to early graft injury. However, the detailed molecular mechanism of I/R injury remains unclear. Carnosic acid, as a phenolic diterpene with function of anti-inflammation, anti-cancer, anti-bacterial, anti-diabetic, as well as neuroprotective properties, is produced by many species from Lamiaceae family. Nanoparticulate drug delivery systems have been known to better the bioavailability of drugs on intranasal administration compared with only drug solutions. Administration of carnosic acid nanoparticles was thought to be sufficient to lead to considerable inhibition of liver injury progression induced by ischemia/reperfusion. In our study, liver ischemia/reperfusion injury was established successfully with C57BL/6 animal model. 10 and 20mg/kg carnosic acid nanoparticles were injected to mice for five days prior to ischemia. After liver ischemia/reperfusion, the levels of serum AST, ALT and APL were increased, which was attenuated by pre-treatment with carnosic acid nanoparticles. In addition, carnosic acid nanoparticles inhibited ROS production via its related signals regulation. And carnosic acid nanoparticles also suppressed the ischemia/reperfusion-induced up-regulation in the pro-apoptotic protein and mRNA levels of Bax, Cyto-c, Apaf-1 and Caspase-9/3 while increased ischemia/reperfusion-induced decrease of anti-apoptotic factor of Bcl-2. Further, ischemia/reperfusion-induced inflammation was also inhibited for carnosic acid nanoparticles administration via inactivating NF-κB signaling pathway, leading to down-regulation of pro-inflammatory cytokines releasing. In conclusion, our study suggested that carnosic acid nanoparticles protected against liver ischemia/reperfusion injury via its role of anti-oxidative, anti-apoptotic and anti-inflammatory bioactivity.
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Affiliation(s)
- Hui Li
- Department of Interventional Radiology, Henan Provincial People's Hospital, Zhengzhou University, 7 Weiwu Rd., Zhengzhou 450003, Henan, People's Republic of China
| | - Jian-Jun Sun
- Department of Liver-Gallbladder-Pancreas Surgery, Henan Provincial People's Hospital, Zhengzhou University, 7 Weiwu Rd., Zhengzhou 450003, Henan, People's Republic of China
| | - Guo-Yong Chen
- Department of Liver-Gallbladder-Pancreas Surgery, Henan Provincial People's Hospital, Zhengzhou University, 7 Weiwu Rd., Zhengzhou 450003, Henan, People's Republic of China
| | - Wei-Wei Wang
- Department of Liver-Gallbladder-Pancreas Surgery, Henan Provincial People's Hospital, Zhengzhou University, 7 Weiwu Rd., Zhengzhou 450003, Henan, People's Republic of China
| | - Zhan-Tao Xie
- Department of Liver-Gallbladder-Pancreas Surgery, Henan Provincial People's Hospital, Zhengzhou University, 7 Weiwu Rd., Zhengzhou 450003, Henan, People's Republic of China
| | - Gao-Feng Tang
- Department of Liver-Gallbladder-Pancreas Surgery, Henan Provincial People's Hospital, Zhengzhou University, 7 Weiwu Rd., Zhengzhou 450003, Henan, People's Republic of China
| | - Si-Dong Wei
- Department of Liver-Gallbladder-Pancreas Surgery, Henan Provincial People's Hospital, Zhengzhou University, 7 Weiwu Rd., Zhengzhou 450003, Henan, People's Republic of China.
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Kwak GH, Kim KY, Kim HY. Methionine sulfoxide reductase B3 deficiency stimulates heme oxygenase-1 expression via ROS-dependent and Nrf2 activation pathways. Biochem Biophys Res Commun 2016; 473:1033-1038. [PMID: 27059143 DOI: 10.1016/j.bbrc.2016.04.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 04/04/2016] [Indexed: 12/30/2022]
Abstract
Methionine sulfoxide reductase B3 (MsrB3), which is primarily found in the endoplasmic reticulum (ER), is an important protein repair enzyme that stereospecifically reduces methionine-R-sulfoxide residues. We previously found that MsrB3 deficiency arrests the cell cycle at the G1/S stage through up-regulation of p21 and p27. In this study, we report a critical role of MsrB3 in gene expression of heme oxygenase-1 (HO-1), which has an anti-proliferative effect associated with p21 up-regulation. Depletion of MsrB3 elevated HO-1 expression in mammalian cells, whereas MsrB3 overexpression had no effect. MsrB3 deficiency increased cellular reactive oxygen species (ROS), particularly in the mitochondria. ER stress, which is associated with up-regulation of HO-1, was also induced by depletion of MsrB3. Treatment with N-acetylcysteine as an ROS scavenger reduced augmented HO-1 levels in MsrB3-depleted cells. MsrB3 deficiency activated Nrf2 transcription factor by enhancing its expression and nuclear import. The activation of Nrf2 induced by MsrB3 depletion was confirmed by increased expression levels of its other target genes, such as γ-glutamylcysteine ligase. Taken together, these data suggest that MsrB3 attenuates HO-1 induction by inhibiting ROS production, ER stress, and Nrf2 activation.
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Affiliation(s)
- Geun-Hee Kwak
- Department of Biochemistry and Molecular Biology, Yeungnam University College of Medicine, Daegu, Republic of Korea
| | - Ki Young Kim
- Department of Biochemistry and Molecular Biology, Yeungnam University College of Medicine, Daegu, Republic of Korea
| | - Hwa-Young Kim
- Department of Biochemistry and Molecular Biology, Yeungnam University College of Medicine, Daegu, Republic of Korea.
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Molecular mechanisms of gastrointestinal protection by quercetin against indomethacin-induced damage: role of NF-κB and Nrf2. J Nutr Biochem 2016; 27:289-98. [DOI: 10.1016/j.jnutbio.2015.09.016] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 09/16/2015] [Accepted: 09/18/2015] [Indexed: 12/30/2022]
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Pillai SS, Mini S. Polyphenols rich Hibiscus rosa sinensis Linn. petals modulate diabetic stress signalling pathways in streptozotocin-induced experimental diabetic rats. J Funct Foods 2016. [DOI: 10.1016/j.jff.2015.10.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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Zhang H, Davies KJA, Forman HJ. Oxidative stress response and Nrf2 signaling in aging. Free Radic Biol Med 2015; 88:314-336. [PMID: 26066302 PMCID: PMC4628850 DOI: 10.1016/j.freeradbiomed.2015.05.036] [Citation(s) in RCA: 577] [Impact Index Per Article: 64.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 05/29/2015] [Accepted: 05/31/2015] [Indexed: 12/20/2022]
Abstract
Increasing oxidative stress, a major characteristic of aging, has been implicated in a variety of age-related pathologies. In aging, oxidant production from several sources is increased, whereas antioxidant enzymes, the primary lines of defense, are decreased. Repair systems, including the proteasomal degradation of damaged proteins, also decline. Importantly, the adaptive response to oxidative stress declines with aging. Nrf2/EpRE signaling regulates the basal and inducible expression of many antioxidant enzymes and the proteasome. Nrf2/EpRE activity is regulated at several levels, including transcription, posttranslation, and interactions with other proteins. This review summarizes current studies on age-related impairment of Nrf2/EpRE function and discusses the changes in Nrf2 regulatory mechanisms with aging.
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Affiliation(s)
- Hongqiao Zhang
- Ethel Percy Andrus Gerontology Center, Leonard Davis School of Gerontology
| | - Kelvin J A Davies
- Ethel Percy Andrus Gerontology Center, Leonard Davis School of Gerontology; Division of Molecular & Computational Biology, Department of Biological Sciences, Dornsife College of Letters, Arts, and Sciences, The University of Southern California, Los Angeles, CA 90089-0191, USA
| | - Henry Jay Forman
- Ethel Percy Andrus Gerontology Center, Leonard Davis School of Gerontology; School of Natural Science, University of California at Merced, Merced, CA 95344, USA.
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41
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SZC017, a novel oleanolic acid derivative, induces apoptosis and autophagy in human breast cancer cells. Apoptosis 2015; 20:1636-50. [DOI: 10.1007/s10495-015-1179-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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42
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Lee EJ, Ko HM, Jeong YH, Park EM, Kim HS. β-Lapachone suppresses neuroinflammation by modulating the expression of cytokines and matrix metalloproteinases in activated microglia. J Neuroinflammation 2015; 12:133. [PMID: 26173397 PMCID: PMC4502557 DOI: 10.1186/s12974-015-0355-z] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 06/29/2015] [Indexed: 12/22/2022] Open
Abstract
Background β-Lapachone (β-LAP) is a natural naphthoquinone compound isolated from the lapacho tree (Tabebuia sp.), and it has been used for treatment of rheumatoid arthritis, infection, and cancer. In the present study, we investigated whether β-LAP has anti-inflammatory effects under in vitro and in vivo neuroinflammatory conditions. Methods The effects of β-LAP on the expression of inducible nitric oxide synthase (iNOS), cytokines, and matrix metalloproteinases (MMPs) were examined in lipopolysaccharide (LPS)-stimulated BV2 microglial cells and rat primary microglia by ELISA, reverse transcription polymerase chain reaction (RT-PCR), and Western blot analysis. Microglial activation and the expression levels of proinflammatory molecules were measured in the LPS-injected mouse brain by immunohistochemistry and RT-PCR analysis. The detailed molecular mechanism underlying the anti-inflammatory effects of β-LAP was analyzed by electrophoretic mobility shift assay, reporter gene assay, Western blot, and RT-PCR analysis. Results β-LAP inhibited the expression of iNOS, proinflammatory cytokines, and MMPs (MMP-3, MMP-8, MMP-9) at mRNA and protein levels in LPS-stimulated microglia. On the other hand, β-LAP upregulated the expressions of anti-inflammatory molecules such as IL-10, heme oxygenase-1 (HO-1), and the tissue inhibitor of metalloproteinase-2 (TIMP-2). The anti-inflammatory effect of β-LAP was confirmed in an LPS-induced systemic inflammation mouse model. Thus, β-LAP inhibited microglial activation and the expressions of iNOS, proinflammatory cytokines, and MMPs in the LPS-injected mouse brain. Further mechanistic studies revealed that β-LAP exerts anti-inflammatory effects by inhibiting MAPKs, PI3K/AKT, and NF-κB/AP-1 signaling pathways in LPS-stimulated microglia. β-LAP also inhibited reactive oxygen species (ROS) production by suppressing the expression and/or phosphorylation of NADPH oxidase subunit proteins, such as p47phox and gp91phox. The anti-oxidant effects of β-LAP appeared to be related with the increase of HO-1 and NQO1 via the Nrf2/anti-oxidant response element (ARE) pathway and/or the PKA pathway. Conclusions The strong anti-inflammatory/anti-oxidant effects of β-LAP may provide preventive therapeutic potential for various neuroinflammatory disorders. Electronic supplementary material The online version of this article (doi:10.1186/s12974-015-0355-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Eun-Jung Lee
- Department of Molecular Medicine, Tissue Injury Defense Research Center, School of Medicine, Ewha Womans University, Mok-6-dong 911-1, Yangchun-Ku, Seoul, 158-710, South Korea.
| | - Hyun-Myung Ko
- Department of Molecular Medicine, Tissue Injury Defense Research Center, School of Medicine, Ewha Womans University, Mok-6-dong 911-1, Yangchun-Ku, Seoul, 158-710, South Korea.
| | - Yeon-Hui Jeong
- Department of Molecular Medicine, Tissue Injury Defense Research Center, School of Medicine, Ewha Womans University, Mok-6-dong 911-1, Yangchun-Ku, Seoul, 158-710, South Korea.
| | - Eun-Mi Park
- Department of Pharmacology, Tissue Injury Defense Research Center, School of Medicine, Ewha Womans University, Seoul, 158-710, South Korea.
| | - Hee-Sun Kim
- Department of Molecular Medicine, Tissue Injury Defense Research Center, School of Medicine, Ewha Womans University, Mok-6-dong 911-1, Yangchun-Ku, Seoul, 158-710, South Korea.
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Mao J, Li Z, Lin R, Zhu X, Lin J, Peng J, Chen L. Preconditioning with Gua Lou Gui Zhi decoction enhances H 2O 2-induced Nrf2/HO-1 activation in PC12 cells. Exp Ther Med 2015; 10:877-884. [PMID: 26622408 DOI: 10.3892/etm.2015.2610] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 05/21/2015] [Indexed: 12/30/2022] Open
Abstract
Spasticity is common in various central neurological conditions, including after a stroke. Such spasticity may cause additional problems, and often becomes a primary concern for afflicted individuals. A number of studies have identified nuclear factor (erythroid-derived 2)-like 2 (Nrf2) as a key regulator in the adaptive survival response to oxidative stress. Elevated expression of Nrf2, combined with heme oxygenase 1 (HO-1) resistance, in the central nervous system is known to elicit key internal and external oxidation protection. Gua Lou Gui Zhi decoction (GLGZD) is a popular traditional Chinese formula with a long history of clinical use in China for the treatment of muscular spasticity following a stroke, epilepsy or a spinal cord injury. However, the mechanism underlying the efficacy of the medicine remains unclear. In the present study, the antioxidative effects of GLGZD were evaluated and the underlying molecular mechanisms were investigated, using hydrogen peroxide (H2O2)-induced rat pheochromocytoma cells (PC12 cells) as an in vitro oxidative stress model of neural cells. Upon application of different concentrations of GLGZD, a 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyltetrazolium bromide (MTT) assay and ATP measurement were conducted to assess the impact on PC12 cell proliferation. In addition, inverted microscopy observations, and the MTT and ATP assessments, revealed that GLGZD attenuated H2O2-induced oxidative damage and signaling repression in PC12 cells. Furthermore, the mRNA and protein expression levels of Nrf2 and HO-1, which are associated with oxidative stress, were analyzed using reverse transcription quantitative polymerase chain reaction (PCR) and confocal microscopy. Confocal microscopy observations, as well as the quantitative PCR assay, revealed that GLGZD exerted a neuroprotective function against H2O2-induced oxidative damage in PC12 cells. Therefore, the results demonstrated that GLGZD protected PC12 cells injured by H2O2, which may be associated with the upregulation of Nrf2 and HO-1 mRNA and protein expression levels in PC12 cells.
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Affiliation(s)
- Jingjie Mao
- Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350122, P.R. China ; Fujian Key Laboratory of Integrative Medicine on Geriatrics, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350122, P.R. China
| | - Zuanfang Li
- Fujian Key Laboratory of Integrative Medicine on Geriatrics, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350122, P.R. China
| | - Ruhui Lin
- Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350122, P.R. China ; Fujian Key Laboratory of Integrative Medicine on Geriatrics, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350122, P.R. China
| | - Xiaoqin Zhu
- Fujian Key Laboratory of Integrative Medicine on Geriatrics, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350122, P.R. China
| | - Jiumao Lin
- Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350122, P.R. China ; Fujian Key Laboratory of Integrative Medicine on Geriatrics, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350122, P.R. China
| | - Jun Peng
- Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350122, P.R. China ; Fujian Key Laboratory of Integrative Medicine on Geriatrics, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350122, P.R. China
| | - Lidian Chen
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350122, P.R. China
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Lee SE, Yang H, Son GW, Park HR, Jin YH, Park CS, Park YS. Crotonaldehyde-exposed macrophages induce heme oxygenase-1 expression as an adaptive mechanism. Mol Cell Toxicol 2015. [DOI: 10.1007/s13273-015-0015-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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45
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An JM, Moon SA, Hong SY, Kang JW, Seo JT. Neuroprotective effect of 3-morpholinosydnonimine against Zn2+-induced PC12 cell death. Eur J Pharmacol 2015; 748:37-44. [DOI: 10.1016/j.ejphar.2014.12.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 12/03/2014] [Accepted: 12/05/2014] [Indexed: 12/18/2022]
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Jeong YH, Park JS, Kim DH, Kim HS. Arctigenin Increases Hemeoxygenase-1 Gene Expression by Modulating PI3K/AKT Signaling Pathway in Rat Primary Astrocytes. Biomol Ther (Seoul) 2014; 22:497-502. [PMID: 25489416 PMCID: PMC4256028 DOI: 10.4062/biomolther.2014.121] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 11/04/2014] [Accepted: 11/05/2014] [Indexed: 12/30/2022] Open
Abstract
In the present study, we found that the natural compound arctigenin inhibited hydrogen peroxide-induced reactive oxygen species (ROS) production in rat primary astrocytes. Since hemeoxygenase-1 (HO-1) plays a critical role as an antioxidant defense factor in the brain, we examined the effect of arctigenin on HO-1 expression in rat primary astrocytes. We found that arctigenin increased HO-1 mRNA and protein levels. Arctigenin also increases the nuclear translocation and DNA binding of Nrf2/c-Jun to the antioxidant response element (ARE) on HO-1 promoter. In addition, arctigenin increased ARE-mediated transcriptional activities in rat primary astrocytes. Further mechanistic studies revealed that arctigenin increased the phosphorylation of AKT, a downstream substrate of phosphatidylinositol 3-kinase (PI3K). Treatment of cells with a PI3K-specific inhibitor, LY294002, suppressed the HO-1 expression, Nrf2 DNA binding and ARE-mediated transcriptional activities in arctigenin-treated astrocyte cells. The results collectively suggest that PI3K/AKT signaling pathway is at least partly involved in HO-1 expression by arctigenin via modulation of Nrf2/ARE axis in rat primary astrocytes.
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Affiliation(s)
- Yeon-Hui Jeong
- Department of Molecular Medicine, Tissue Injury Defense Research Center, Ewha Womans University Medical School, Seoul 158-710
| | - Jin-Sun Park
- Department of Molecular Medicine, Tissue Injury Defense Research Center, Ewha Womans University Medical School, Seoul 158-710
| | - Dong-Hyun Kim
- Life and Nanopharmaceutical Sciences, College of Pharmacy, Kyung Hee University, Seoul 130-701, Republic of Korea
| | - Hee-Sun Kim
- Department of Molecular Medicine, Tissue Injury Defense Research Center, Ewha Womans University Medical School, Seoul 158-710
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Chi PL, Lin CC, Chen YW, Hsiao LD, Yang CM. CO Induces Nrf2-Dependent Heme Oxygenase-1 Transcription by Cooperating with Sp1 and c-Jun in Rat Brain Astrocytes. Mol Neurobiol 2014; 52:277-92. [PMID: 25148934 DOI: 10.1007/s12035-014-8869-4] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 08/15/2014] [Indexed: 12/30/2022]
Abstract
Upregulation of heme oxygenase 1 (HO-1) by carbon monoxide (CO) delivered by CO-releasing molecules (CORMs) may be utilized as a therapeutic intervention for neurodegenerative diseases. This study was to delineate the two putative anti-oxidant response elements (AREs) in modulating HO-1 gene by participating with its promoter elements in rat brain astrocytes (RBA-1). CORM-2-induced HO-1 expression was mediated through superoxide, p38 mitogen-activated protein kinase(MAPK), extracellular signal-regulated protein kinases 1 and 2 (Erk1/2), protein tyrosine kinase 2 (Pyk2), platelet-derived growth factor receptor (PDGFR), and phosphatidylinositol 3'-kinase (PI3K/Akt), revealed by the pharmacological inhibitors or knockdown of these signaling molecules. CORM-2-enhanced HO-1 promoter activity was inhibited by co-transfection with small interfering RNA (siRNA) of c-Jun, specificity protein 1 (Sp1), or nuclear factor-erythroid 2-related factor 2 (Nrf2). Immunoprecipitation assay showed that CORM-2 increased the association of nuclear Nrf2 with Sp1 and c-Jun. Furthermore, chromatin immunoprecipitation (ChIP) assay confirmed that Nrf2, Sp1, and c-Jun are associated with the proximal ARE binding site on HO-1 promoter, suggesting that Nrf2/Sp1/c-Jun cooperations are key transcription factors modulating HO-1 expression. Mechanistically, CORM-2-induced ARE promoter activity was reduced by the inhibitors of reactive oxygen species (ROS), p38 MAPK, Pyk2, MAPK/ERK kinases 1 and 2 (MEK1/2), PDGFR, and PI3K/Akt or the siRNAs of c-Jun, SP1, and Nrf2. These findings suggested that CORM-2 increases formation of c-Jun, Sp1, and Nrf2 complex and binding with ARE1 binding site, which is mediated through both ROS/p38 MAPK and Pyk2-dependent PDGFR/PI3K/Akt/Erk1/2 pathways, resulting in HO-1 expression in RBA-1 cells.
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Affiliation(s)
- Pei-Ling Chi
- Department of Physiology and Pharmacology and Health Ageing Research Center, College of Medicine, Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan, 33302, Tao-Yuan, Taiwan
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48
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Essential role of PH domain and leucine-rich repeat protein phosphatase 2 in Nrf2 suppression via modulation of Akt/GSK3β/Fyn kinase axis during oxidative hepatocellular toxicity. Cell Death Dis 2014; 5:e1153. [PMID: 24675471 PMCID: PMC3973230 DOI: 10.1038/cddis.2014.118] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Revised: 02/21/2014] [Accepted: 02/21/2014] [Indexed: 12/30/2022]
Abstract
Instances of sustained oxidative activity have been shown to involve dysregulation of Nrf2-mediated transcriptional induction; however, mechanisms warranting Nrf2-repression remain unclear. In this study, using primary rat hepatocytes, we have attempted to identify factors that may negatively influence Nrf2 survival pathway. Though studies indicate a conspicuous association between Akt and Nrf2, a confirmatory link between the two is unaddressed. On inhibiting PI3K/Akt pathway, we observed compromised activities of antioxidant and detoxification enzymes culminating in oxidative cytotoxicity. This was accompanied by reduced nuclear retention of Nrf2 and its ARE binding affinity, increased Nrf2 ubiquitination and concurrent decline in its downstream targets. Moreover, Akt inhibition enhanced nuclear translocation as well as phosphorylation of Fyn kinase, an enzyme linked to Nrf2 degradation, by relieving GSK3β from phosphorylation-mediated repression. The involvement of Akt and Fyn kinase in influencing Nrf2 signaling was further confirmed in oxidatively stressed hepatocytes by using tert-butyl hydroperoxide (tBHP). tBHP-induced decrease in Nrf2 levels was associated with enhanced Fyn kinase phosphorylation, Fyn kinase nuclear translocation and decreased levels of phosphorylated GSK3β(Ser9) in a time-dependent manner. Interestingly, tBHP induced site-specific deactivation of Akt as only Akt(Ser473) phosphorylation was observed to be affected. Further, protein expression as well as nuclear localization of PHLPP2, a phosphatase specific for Akt(Ser473), was found to be significantly enhanced in tBHP-stressed hepatocytes. Silencing of PHLPP2 not only resulted in considerable restoration of Nrf2 signaling, enhanced Nrf2-ARE binding and reduced Nrf2 ubiquitination but also significantly suppressed tBHP-induced ROS generation and alterations in mitochondrial permeability. We infer that cellular PHLPP2 levels may aggravate oxidative toxicity by suppressing Nrf2/ARE transcriptional regulation via Akt(Se473)/GSK3β/Fyn kinase axis. The study indicates that PHLPP2 could serve as a new target for developing strategies to manage pathological conditions exacerbated due to oxidative stress.
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Ryu MJ, Kang KA, Piao MJ, Kim KC, Zheng J, Yao CW, Cha JW, Hyun CL, Chung HS, Park JC, Cho SJ, Hyun JW. Effect of 7, 8-dihydroxyflavone on the up-regulation of Nrf2-mediated heme oxygenase-1 expression in hamster lung fibroblasts. In Vitro Cell Dev Biol Anim 2014; 50:549-54. [PMID: 24610348 DOI: 10.1007/s11626-014-9735-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Accepted: 01/17/2014] [Indexed: 12/30/2022]
Abstract
The cytoprotective mechanism of 7, 8-dihydroxyflavone (DHF) against oxidative stress-induced cell damage with respect to its stimulatory effect on the expression of heme oxygenase-1 (HO-1), a potent antioxidant enzyme, was investigated in the present study. Up-regulation of HO-1 expression by DHF was both dose and time dependent in lung fibroblast V79-4 cells. DHF also increased the protein expression level of the transcription factor nuclear factor erythroid-2-related factor 2 (Nrf2), and induced the translocation of Nrf2 from the cytosol into the nucleus, leading to elevated HO-1 expression. The siNrf2 RNA-transfection attenuated HO-1 expression induced by DHF treatment. In addition, DHF induced the activation of extracellular signal-regulated kinase (ERK), while U0126 (a specific pharmacological inhibitor of ERK kinase) abrogated DHF-activated Nrf2 and HO-1 expression. This suggests that DHF increased the levels of Nrf2 and HO-1 via ERK-dependent pathways. Furthermore, DHF significantly prevented the reduction of cell viability in response to oxidative stress; however, U0126 attenuated the protective effect of DHF. Taken together, these results demonstrate that DHF protected cells from oxidative stress via the activation of an ERK/Nrf2/HO-1 signaling pathway.
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Affiliation(s)
- Min Ju Ryu
- Food and Nutrition, Duksung Women's University, Seoul, 132-714, Republic of Korea
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50
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Ryu MJ, Kang KA, Piao MJ, Kim KC, Zheng J, Yao CW, Cha JW, Chung HS, Kim SC, Jung E, Park D, Chae S, Hyun JW. 7,8-Dihydroxyflavone protects human keratinocytes against oxidative stress-induced cell damage via the ERK and PI3K/Akt-mediated Nrf2/HO-1 signaling pathways. Int J Mol Med 2014; 33:964-70. [PMID: 24503931 DOI: 10.3892/ijmm.2014.1643] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Accepted: 01/30/2014] [Indexed: 11/06/2022] Open
Abstract
This study investigated the effect of 7,8-dihydroxyflavone (DHF) on the expression and activity of heme oxygenase-1 (HO-1), an enzyme with potent antioxidant properties, as well as the molecular mechanisms involved. DHF markedly upregulated HO-1 mRNA and protein expression in human keratinocytes (HaCaT cells), resulting in increased HO-1 activity. DHF also increased the protein level of transcription factor nuclear factor erythroid 2-related factor 2 (Nrf2), which regulates HO-1 expression by binding to the antioxidant response element (ARE) within the HO-1 gene promoter, in a time-dependent manner. Moreover, DHF decreased the expression of Kelch-like ECH-associated protein 1, a repressor of Nrf2 activity, and induced the translocation of Nrf2 from the cytosol into the nucleus, thereby allowing its association with the ARE site. DHF activated extracellular-regulated kinase (ERK) and protein kinase B (PKB, Akt) in keratinocytes, while the ERK and Akt inhibitors attenuated DHF-enhanced Nrf2 and HO-1 expression. DHF also protected the keratinocytes against hydrogen peroxide- and ultraviolet B-induced oxidative damage, while HO-1, ERK and Akt inhibitors markedly suppressed DHF-mediated cytoprotection. Taken together, the results suggested that DHF activates ERK- and Akt-Nrf2 signaling cascades in HaCaT cells, leading to the upregulation of HO-1 and cytoprotection against oxidative stress.
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Affiliation(s)
- Min Ju Ryu
- Food and Nutrition, Duksung Women's University, Seoul 132-714, Republic of Korea
| | - Kyoung Ah Kang
- School of Medicine and Institute for Nuclear Science and Technology, Jeju National University, Jeju 690-756, Republic of Korea
| | - Mei Jing Piao
- School of Medicine and Institute for Nuclear Science and Technology, Jeju National University, Jeju 690-756, Republic of Korea
| | - Ki Cheon Kim
- School of Medicine and Institute for Nuclear Science and Technology, Jeju National University, Jeju 690-756, Republic of Korea
| | - Jian Zheng
- School of Medicine and Institute for Nuclear Science and Technology, Jeju National University, Jeju 690-756, Republic of Korea
| | - Cheng Wen Yao
- School of Medicine and Institute for Nuclear Science and Technology, Jeju National University, Jeju 690-756, Republic of Korea
| | - Ji Won Cha
- School of Medicine and Institute for Nuclear Science and Technology, Jeju National University, Jeju 690-756, Republic of Korea
| | - Ha Sook Chung
- Food and Nutrition, Duksung Women's University, Seoul 132-714, Republic of Korea
| | - Sang Cheol Kim
- Biospectrum Life Science Institute, Seongnam, Gyunggi Do 442‑13, Republic of Korea
| | - Eunsun Jung
- Biospectrum Life Science Institute, Seongnam, Gyunggi Do 442‑13, Republic of Korea
| | - Deokhoon Park
- Biospectrum Life Science Institute, Seongnam, Gyunggi Do 442‑13, Republic of Korea
| | - Sungwook Chae
- Aging Research Center, Korea Institute of Oriental Medicine, Daejeon 305-811, Republic of Korea
| | - Jin Won Hyun
- School of Medicine and Institute for Nuclear Science and Technology, Jeju National University, Jeju 690-756, Republic of Korea
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