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Allegra A, Mirabile G, Caserta S, Stagno F, Russo S, Pioggia G, Gangemi S. Oxidative Stress and Chronic Myeloid Leukemia: A Balance between ROS-Mediated Pro- and Anti-Apoptotic Effects of Tyrosine Kinase Inhibitors. Antioxidants (Basel) 2024; 13:461. [PMID: 38671909 PMCID: PMC11047441 DOI: 10.3390/antiox13040461] [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: 02/20/2024] [Revised: 03/31/2024] [Accepted: 04/12/2024] [Indexed: 04/28/2024] Open
Abstract
The balanced reciprocal translocation t (9; 22) (q34; q11) and the BCR-ABL fusion gene, which produce p210 bcr-abl protein production with high tyrosine kinase activity, are characteristics of chronic myeloid leukemia, a myeloproliferative neoplasm. This aberrant protein affects several signaling pathways connected to both apoptosis and cell proliferation. It has been demonstrated that tyrosine kinase inhibitor treatment in chronic myeloid leukemia acts by inducing oxidative stress and, depending on its level, can activate signaling pathways responsible for either apoptosis or survival in leukemic cells. Additionally, oxidative stress and reactive oxygen species generation also mediate apoptosis through genomic activation. Furthermore, it was shown that oxidative stress has a role in both BCR-ABL-independent and BCR-ABL-dependent resistance pathways to tyrosine kinases, while patients with chronic myeloid leukemia were found to have a significantly reduced antioxidant level. The ideal environment for tyrosine kinase inhibitor therapy is produced by a favorable oxidative status. We discuss the latest studies that aim to manipulate the redox system to alter the apoptosis of cancerous cells.
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Affiliation(s)
- Alessandro Allegra
- Division of Hematology, Department of Human Pathology in Adulthood and Childhood ‘Gaetano Barresi’, University of Messina, 98125 Messina, Italy; (G.M.); (S.C.); (F.S.); (S.R.)
| | - Giuseppe Mirabile
- Division of Hematology, Department of Human Pathology in Adulthood and Childhood ‘Gaetano Barresi’, University of Messina, 98125 Messina, Italy; (G.M.); (S.C.); (F.S.); (S.R.)
| | - Santino Caserta
- Division of Hematology, Department of Human Pathology in Adulthood and Childhood ‘Gaetano Barresi’, University of Messina, 98125 Messina, Italy; (G.M.); (S.C.); (F.S.); (S.R.)
| | - Fabio Stagno
- Division of Hematology, Department of Human Pathology in Adulthood and Childhood ‘Gaetano Barresi’, University of Messina, 98125 Messina, Italy; (G.M.); (S.C.); (F.S.); (S.R.)
| | - Sabina Russo
- Division of Hematology, Department of Human Pathology in Adulthood and Childhood ‘Gaetano Barresi’, University of Messina, 98125 Messina, Italy; (G.M.); (S.C.); (F.S.); (S.R.)
| | - Giovanni Pioggia
- Institute for Biomedical Research and Innovation (IRIB), National Research Council of Italy (CNR), 98164 Messina, Italy;
| | - Sebastiano Gangemi
- Allergy and Clinical Immunology Unit, Department of Clinical and Experimental Medicine, University of Messina, 98100 Messina, Italy;
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2
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Luo L, Pervaiz S, Clement MV. A superoxide-driven redox state promotes geroconversion and resistance to senolysis in replication-stress associated senescence. Redox Biol 2023; 64:102757. [PMID: 37285741 DOI: 10.1016/j.redox.2023.102757] [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: 04/08/2023] [Revised: 05/11/2023] [Accepted: 05/19/2023] [Indexed: 06/09/2023] Open
Abstract
Using S-phase synchronized RPE1-hTERT cells exposed to the DNA damaging agent, methyl methanesulfonate, we show the existence of a redox state associated with replication stress-induced senescence termed senescence-associated redox state (SA-redox state). SA-redox state is characterized by its reactivity with superoxide-sensing fluorescent probes such as dihydroethidine, lucigenin and mitosox and peroxynitrite or hydroxyl radical sensing probe hydroxyphenyl fluorescein (HPF) but not the hydrogen peroxide (H2O2) reactive fluorescent probe CM-H2DCFDA. Measurement of GSH and GSSH also reveals that SA-redox state mitigates the level of total GSH rather than oxidizes GSH to GSSG. Moreover, supporting the role of superoxide (O2.-) in the SA-redox state, we show that incubation of senescent RPE1-hTERT cells with the O2.- scavenger, Tiron, decreases the reactivity of SA-redox state with the oxidants' reactive probes lucigenin and HPF while the H2O2 antioxidant N-acetyl cysteine has no effect. SA-redox state does not participate in the loss of proliferative capacity, G2/M cell cycle arrest or the increase in SA-β-Gal activity. However, SA-redox state is associated with the activation of NF-κB, dictates the profile of the Senescence Associated Secretory Phenotype, increases TFEB protein level, promotes geroconversion evidenced by increased phosphorylation of S6K and S6 proteins, and influences senescent cells response to senolysis. Furthermore, we provide evidence for crosstalk between SA redox state, p53 and p21. While p53 mitigates the establishment of SA-redox state, p21 is critical for the sustained reinforcement of the SA-redox state involved in geroconversion and resistance to senolysis.
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Affiliation(s)
- Le Luo
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, 117596, Singapore
| | - Shazib Pervaiz
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; NUS Medicine Healthy Longevity Program, National University of Singapore, Singapore; Integrated Science and Engineering Program, NUS Graduate School, National University of Singapore, Singapore; NUS Centre for Cancer Research (N2CR), Yong Loo Lin School of Medicine, National University of Singapore, Singapore; National University Cancer Institute, National University Health System, Singapore
| | - Marie-Veronique Clement
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, 117596, Singapore; NUS Medicine Healthy Longevity Program, National University of Singapore, Singapore; Integrated Science and Engineering Program, NUS Graduate School, National University of Singapore, Singapore; NUS Centre for Cancer Research (N2CR), Yong Loo Lin School of Medicine, National University of Singapore, Singapore; National University Cancer Institute, National University Health System, Singapore.
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3
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Wesdorp MA, Schwab A, Bektas EI, Narcisi R, Eglin D, Stoddart MJ, Van Osch GJ, D'Este M. A culture model to analyze the acute biomaterial-dependent reaction of human primary neutrophils in vitro. Bioact Mater 2023; 20:627-637. [PMID: 35846845 PMCID: PMC9256821 DOI: 10.1016/j.bioactmat.2022.05.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 05/08/2022] [Accepted: 05/28/2022] [Indexed: 11/16/2022] Open
Affiliation(s)
- Marinus A. Wesdorp
- AO Research Institute Davos, AO Foundation, Davos Platz, Switzerland
- Department of Orthopaedics and Sports Medicine, Erasmus MC, University Medical Center Rotterdam, the Netherlands
| | - Andrea Schwab
- AO Research Institute Davos, AO Foundation, Davos Platz, Switzerland
- Department of Orthopaedics and Sports Medicine, Erasmus MC, University Medical Center Rotterdam, the Netherlands
- Department of Oral and Maxillofacial Surgery, Erasmus MC, University Medical Center Rotterdam, the Netherlands
| | - Ezgi Irem Bektas
- AO Research Institute Davos, AO Foundation, Davos Platz, Switzerland
| | - Roberto Narcisi
- Department of Orthopaedics and Sports Medicine, Erasmus MC, University Medical Center Rotterdam, the Netherlands
| | - David Eglin
- AO Research Institute Davos, AO Foundation, Davos Platz, Switzerland
- Mines Saint-Étienne, Univ Lyon, Univ Jean Monnet, INSERM, U1059 Sainbiose, Saint-Étienne, France
- Department of Biomaterials Science and Technology, University of Twente, Enschede, the Netherlands
| | | | - Gerjo J.V.M. Van Osch
- Department of Orthopaedics and Sports Medicine, Erasmus MC, University Medical Center Rotterdam, the Netherlands
- Department of Otorhinolaryngology, Erasmus MC, University Medical Center Rotterdam, the Netherlands
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology, the Netherlands
| | - Matteo D'Este
- AO Research Institute Davos, AO Foundation, Davos Platz, Switzerland
- Corresponding author. AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland.
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Myo H, Khat-Udomkiri N. Optimization of ultrasound-assisted extraction of bioactive compounds from coffee pulp using propylene glycol as a solvent and their antioxidant activities. ULTRASONICS SONOCHEMISTRY 2022; 89:106127. [PMID: 36007328 PMCID: PMC9424582 DOI: 10.1016/j.ultsonch.2022.106127] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 07/31/2022] [Accepted: 08/14/2022] [Indexed: 06/15/2023]
Abstract
In the cosmetic and pharmaceutical industries, it has been increasingly popular to use alternative solvents in the extraction of bioactive compounds from plants. Coffee pulp, a by-product of coffee production, contains different phenolic compounds with antioxidant properties. The effects of polyols, amplitude, extraction time, solvent concentration, and liquid-solid ratio on total phenolic content (TPC) using ultrasound-assisted extraction (UAE) were examined by single-factor studies. Three main factors that impact TPC were selected to optimize the extraction conditions for total phenolic content (TPC), total flavonoid content (TFC), total tannin content (TTC), and their antioxidant activities using the Box-Behnken design. Different extraction methods were compared, the bioactive compounds were identified and quantified by liquid chromatography triple quadrupole mass spectrometer (LC-QQQ), and the cytotoxicity and cellular antioxidant activities of the extract were studied. According to the response model, the optimal conditions for the extraction of antioxidants from coffee pulp were as follows: extraction time of 7.65 min, liquid-solid ratio of 22.22 mL/g, and solvent concentration of 46.71 %. Under optimized conditions, the values of TPC, TFC, TTC, 1,1-diphenyl-2-picryl-hydrazil (DPPH) radical scavenging assay, 2,2'-azino-bis-3-ethylbenzthiazoline-6-sulphonic acid (ABTS) radical scavenging assay, and Ferric reducing antioxidant power assay (FRAP) were 9.29 ± 0.02 mg GAE/g sample, 58.82 ± 1.38 mg QE/g sample, 8.69 ± 0.25 mg TAE/g sample, 7.56 ± 0.27 mg TEAC/g sample, 13.59 ± 0.25 mg TEAC/g sample, and 10.90 ± 0.24 mg FeSO4/g sample, respectively. Compared with other extraction conditions, UAE with propylene glycol extract (PG-UAE) was significantlyhigher in TPC, TFC, TTC, DPPH, ABTS, and FRAP response values than UAE with ethanol (EtOH-UAE), maceration with propylene glycol (PG-maceration), and maceration with ethanol (EtOH -maceration) (p < 0.05). Major bioactive compounds detected by LC-QQQ included chlorogenic acid, caffeine, and trigonelline. At higher concentrations starting from 5 mg/ml, PG-UAE extract showed higher cell viability than EtOH-UAE in both cytotoxicity and cellular antioxidant assays. The researcher expects that this new extraction technique developed in this work could produce a higher yield of bioactive compounds with higher biological activity. Therefore, they can be used as active ingredients in cosmetics (anti-aging products) and pharmaceutical applications (food supplements, treatment for oxidative stress-related diseases) with minimal use of chemicals and energy.
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Affiliation(s)
- Hla Myo
- School of Cosmetic Science, Mae Fah Luang University, Chiang Rai 57100, Thailand.
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5
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Farhan M, Rizvi A. Understanding the Prooxidant Action of Plant Polyphenols in the Cellular Microenvironment of Malignant Cells: Role of Copper and Therapeutic Implications. Front Pharmacol 2022; 13:929853. [PMID: 35795551 PMCID: PMC9251333 DOI: 10.3389/fphar.2022.929853] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 06/02/2022] [Indexed: 12/13/2022] Open
Abstract
Plant derived polyphenolic compounds are considered critical components of human nutrition and have shown chemotherapeutic effects against a number of malignancies. Several studies have confirmed the ability of polyphenols to induce apoptosis and regression of tumours in animal models. However, the mechanism through which polyphenols modulate their malignant cell selective anticancer effects has not been clearly established. While it is believed that the antioxidant properties of these molecules may contribute to lowering the risk of cancer induction by causing oxidative damage to DNA, it could not be held responsible for chemotherapeutic properties and apoptosis induction. It is a well known fact that cellular copper increases within the malignant cell and in serum of patients harboring malignancies. This phenomenon is independent of the cellular origin of malignancies. Based on our own observations and those of others; over the last 30 years our laboratory has shown that cellular copper reacts with plant derived polyphenolic compounds, by a Fenton like reaction, which generates reactive oxygen species and leads to genomic DNA damage. This damage then causes an apoptosis like cell death of malignant cells, while sparing normal cells. This communication reviews our work in this area and lays the basis for understanding how plant derived polyphenols can behave as prooxidants (and not antioxidants) within the microenvironment of a malignancy (elevated copper levels) and gives rationale for their preferential cytotoxicity towards malignant cells.
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Affiliation(s)
- Mohd Farhan
- Department of Basic Sciences, Preparatory Year Deanship, King Faisal University, Al-Ahsa, Saudi Arabia
- *Correspondence: Mohd Farhan,
| | - Asim Rizvi
- Department of Kulliyat, Faculty of Unani Medicine, Aligarh Muslim University, Aligarh, India
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Tie F, Fu Y, Hu N, Wang H. Silibinin Protects against H2O2-Induced Oxidative Damage in SH-SY5Y Cells by Improving Mitochondrial Function. Antioxidants (Basel) 2022; 11:antiox11061101. [PMID: 35739997 PMCID: PMC9219938 DOI: 10.3390/antiox11061101] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/29/2022] [Accepted: 05/30/2022] [Indexed: 12/04/2022] Open
Abstract
Oxidative stress plays a critical role in the pathogenesis of various neurodegenerative diseases. Increasing evidence suggests the association of mitochondrial abnormalities with oxidative stress-related neural damage. Silibinin, a natural flavonol compound isolated from Silybum marianum, exhibits multiple biological activities. The present study investigated the effects of silibinin on H2O2-induced oxidative stress in human neuroblastoma SH-SY5Y cells. Exposure to H2O2 (750 µM) reduced the viability of SH-SY5Y cells, which was coupled with increased reactive oxygen species (ROS), abnormal cell morphology, and mitochondrial dysfunction. Remarkably, silibinin (1, 5, and 10 µM) treatment attenuated the H2O2-induced cell death. Moreover, silibinin reduced ROS production and the levels of malondialdehyde (MDA), increased the levels of superoxide dismutase (SOD) and glutathione (GSH), and increased mitochondrial membrane potential. Moreover, silibinin normalized the expression of nuclear factor 2-related factor 2 (Nrf2)-related and mitochondria-associated proteins. Taken together, our findings demonstrated that silibinin could attenuate H2O2-induced oxidative stress by regulating Nrf2 signaling and improving mitochondrial function in SH-SY5Y cells. The protective effect against oxidative stress suggests silibinin as a potential candidate for preventing neurodegeneration.
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Affiliation(s)
| | | | | | - Honglun Wang
- Correspondence: ; Tel.: +86-139-9738-4106; Fax: +86-971-6143-857
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7
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Brief incubation of corneal grafts in activated platelet rich plasma enhances corneal endothelial cell survival and regeneration. Exp Eye Res 2022; 220:109100. [DOI: 10.1016/j.exer.2022.109100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 03/28/2022] [Accepted: 04/26/2022] [Indexed: 11/19/2022]
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8
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Hydrogen Peroxide and Amyotrophic Lateral Sclerosis: From Biochemistry to Pathophysiology. Antioxidants (Basel) 2021; 11:antiox11010052. [PMID: 35052556 PMCID: PMC8773294 DOI: 10.3390/antiox11010052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 12/18/2021] [Accepted: 12/24/2021] [Indexed: 11/19/2022] Open
Abstract
Free radicals are unstable chemical reactive species produced during Redox dyshomeostasis (RDH) inside living cells and are implicated in the pathogenesis of various neurodegenerative diseases. One of the most complicated and life-threatening motor neurodegenerative diseases (MND) is amyotrophic lateral sclerosis (ALS) because of the poor understanding of its pathophysiology and absence of an effective treatment for its cure. During the last 25 years, researchers around the globe have focused their interest on copper/zinc superoxide dismutase (Cu/Zn SOD, SOD1) protein after the landmark discovery of mutant SOD1 (mSOD1) gene as a risk factor for ALS. Substantial evidence suggests that toxic gain of function due to redox disturbance caused by reactive oxygen species (ROS) changes the biophysical properties of native SOD1 protein thus, instigating its fibrillization and misfolding. These abnormal misfolding aggregates or inclusions of SOD1 play a role in the pathogenesis of both forms of ALS, i.e., Sporadic ALS (sALS) and familial ALS (fALS). However, what leads to a decrease in the stability and misfolding of SOD1 is still in question and our scientific knowledge is scarce. A large number of studies have been conducted in this area to explore the biochemical mechanistic pathway of SOD1 aggregation. Several studies, over the past two decades, have shown that the SOD1-catalyzed biochemical reaction product hydrogen peroxide (H2O2) at a pathological concentration act as a substrate to trigger the misfolding trajectories and toxicity of SOD1 in the pathogenesis of ALS. These toxic aggregates of SOD1 also cause aberrant localization of TAR-DNA binding protein 43 (TDP-43), which is characteristic of neuronal cytoplasmic inclusions (NCI) found in ALS. Here in this review, we present the evidence implicating the pivotal role of H2O2 in modulating the toxicity of SOD1 in the pathophysiology of the incurable and highly complex disease ALS. Also, highlighting the role of H2O2 in ALS, we believe will encourage scientists to target pathological concentrations of H2O2 thereby halting the misfolding of SOD1.
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9
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Waldeck-Weiermair M, Yadav S, Spyropoulos F, Krüger C, Pandey AK, Michel T. Dissecting in vivo and in vitro redox responses using chemogenetics. Free Radic Biol Med 2021; 177:360-369. [PMID: 34752919 PMCID: PMC8639655 DOI: 10.1016/j.freeradbiomed.2021.11.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 10/08/2021] [Accepted: 11/04/2021] [Indexed: 02/03/2023]
Abstract
Hydrogen peroxide (H2O2) is the most abundant reactive oxygen species (ROS) within mammalian cells. At low concentrations, H2O2 serves as a versatile cell signaling molecule that mediates vital physiological functions. Yet at higher concentrations, H2O2 can be a toxic molecule by promoting pathological oxidative stress in cells and tissues. Within normal cells, H2O2 is differentially distributed in a variety of subcellular locales. Moreover, many redox-active enzymes and their substrates are themselves differentially distributed within cells. Numerous reports have described the biological and biochemical consequences of adding exogenous H2O2 to cultured cells and tissues, but many of these observations are difficult to interpret: the effects of exogenous H2O2 do not necessarily replicate the cellular responses to endogenous H2O2. In recent years, chemogenetic approaches have been developed to dynamically regulate the abundance of H2O2 in specific subcellular locales. Chemogenetic approaches have been applied in multiple experimental systems, ranging from in vitro studies on the intracellular transport and metabolism of H2O2, all the way to in vivo studies that generate oxidative stress in specific organs in living animals. These chemogenetic approaches have exploited a yeast-derived d-amino acid oxidase (DAAO) that synthesizes H2O2 only in the presence of its d-amino acid substrate. DAAO can be targeted to various subcellular locales, and can be dynamically activated by the addition or withdrawal of its d-amino acid substrate. In addition, recent advances in the development of highly sensitive genetically encoded H2O2 biosensors are providing a better understanding of both physiological and pathological oxidative pathways. This review highlights several applications of DAAO as a chemogenetic tool across a wide range of biological systems, from analyses of subcellular H2O2 metabolism in cells to the development of new disease models caused by oxidative stress in vivo.
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Affiliation(s)
- Markus Waldeck-Weiermair
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA; Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010, Graz, Austria
| | - Shambhu Yadav
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Fotios Spyropoulos
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA; Department of Pediatric Newborn Medicine, Harvard Medical School, Brigham and Women's Hospital, 75 Francis Street, Boston, MA, USA
| | - Christina Krüger
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Arvind K Pandey
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Thomas Michel
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA.
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10
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Foo BJA, Eu JQ, Hirpara JL, Pervaiz S. Interplay between Mitochondrial Metabolism and Cellular Redox State Dictates Cancer Cell Survival. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:1341604. [PMID: 34777681 PMCID: PMC8580634 DOI: 10.1155/2021/1341604] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 09/30/2021] [Accepted: 10/04/2021] [Indexed: 02/06/2023]
Abstract
Mitochondria are the main powerhouse of the cell, generating ATP through the tricarboxylic acid cycle (TCA) and oxidative phosphorylation (OXPHOS), which drives myriad cellular processes. In addition to their role in maintaining bioenergetic homeostasis, changes in mitochondrial metabolism, permeability, and morphology are critical in cell fate decisions and determination. Notably, mitochondrial respiration coupled with the passage of electrons through the electron transport chain (ETC) set up a potential source of reactive oxygen species (ROS). While low to moderate increase in intracellular ROS serves as secondary messenger, an overwhelming increase as a result of either increased production and/or deficient antioxidant defenses is detrimental to biomolecules, cells, and tissues. Since ROS and mitochondria both regulate cell fate, attention has been drawn to their involvement in the various processes of carcinogenesis. To that end, the link between a prooxidant milieu and cell survival and proliferation as well as a switch to mitochondrial OXPHOS associated with recalcitrant cancers provide testimony for the remarkable metabolic plasticity as an important hallmark of cancers. In this review, the regulation of cell redox status by mitochondrial metabolism and its implications for cancer cell fate will be discussed followed by the significance of mitochondria-targeted therapies for cancer.
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Affiliation(s)
- Brittney Joy-Anne Foo
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore (NUS), Singapore, Singapore
| | - Jie Qing Eu
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore (NUS), Singapore, Singapore
- Cancer Science Institute, NUS, Singapore, Singapore
| | | | - Shazib Pervaiz
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore (NUS), Singapore, Singapore
- NUS Center for Cancer Research (N2CR), Yong Loo Lin School of Medicine, NUS, Singapore, Singapore
- NUS Medicine Healthy Longevity Program, Yong Loo Lin School of Medicine, NUS, Singapore, Singapore
- Integrative Sciences and Engineering Program, NUS Graduate School, NUS, Singapore, Singapore
- National University Cancer Institute, National University Health System, Singapore, Singapore
- Faculté de Médicine, Université de Paris, Paris, France
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11
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Wright DE, Panaseiko N, O'Donoghue P. Acetylated Thioredoxin Reductase 1 Resists Oxidative Inactivation. Front Chem 2021; 9:747236. [PMID: 34604175 PMCID: PMC8479162 DOI: 10.3389/fchem.2021.747236] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 08/27/2021] [Indexed: 11/30/2022] Open
Abstract
Thioredoxin Reductase 1 (TrxR1) is an enzyme that protects human cells against reactive oxygen species generated during oxidative stress or in response to chemotherapies. Acetylation of TrxR1 is associated with oxidative stress, but the function of TrxR1 acetylation in oxidizing conditions is unknown. Using genetic code expansion, we produced recombinant and site-specifically acetylated variants of TrxR1 that also contain the non-canonical amino acid, selenocysteine, which is essential for TrxR1 activity. We previously showed site-specific acetylation at three different lysine residues increases TrxR1 activity by reducing the levels of linked dimers and low activity TrxR1 tetramers. Here we use enzymological studies to show that acetylated TrxR1 is resistant to both oxidative inactivation and peroxide-induced multimer formation. To compare the effect of programmed acetylation at specific lysine residues to non-specific acetylation, we produced acetylated TrxR1 using aspirin as a model non-enzymatic acetyl donor. Mass spectrometry confirmed aspirin-induced acetylation at multiple lysine residues in TrxR1. In contrast to unmodified TrxR1, the non-specifically acetylated enzyme showed no loss of activity under increasing and strongly oxidating conditions. Our data suggest that both site-specific and general acetylation of TrxR1 regulate the enzyme’s ability to resist oxidative damage.
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Affiliation(s)
- David E Wright
- Departments of Biochemistry, The University of Western Ontario, London, ON, Canada
| | - Nikolaus Panaseiko
- Departments of Biochemistry, The University of Western Ontario, London, ON, Canada
| | - Patrick O'Donoghue
- Departments of Biochemistry, The University of Western Ontario, London, ON, Canada.,Departments of Chemistry, The University of Western Ontario, London, ON, Canada
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12
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Raghunandan S, Ramachandran S, Ke E, Miao Y, Lal R, Chen ZB, Subramaniam S. Heme Oxygenase-1 at the Nexus of Endothelial Cell Fate Decision Under Oxidative Stress. Front Cell Dev Biol 2021; 9:702974. [PMID: 34595164 PMCID: PMC8476872 DOI: 10.3389/fcell.2021.702974] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 08/17/2021] [Indexed: 12/31/2022] Open
Abstract
Endothelial cells (ECs) form the inner lining of blood vessels and are central to sensing chemical perturbations that can lead to oxidative stress. The degree of stress is correlated with divergent phenotypes such as quiescence, cell death, or senescence. Each possible cell fate is relevant for a different aspect of endothelial function, and hence, the regulation of cell fate decisions is critically important in maintaining vascular health. This study examined the oxidative stress response (OSR) in human ECs at the boundary of cell survival and death through longitudinal measurements, including cellular, gene expression, and perturbation measurements. 0.5 mM hydrogen peroxide (HP) produced significant oxidative stress, placed the cell at this junction, and provided a model to study the effectors of cell fate. The use of systematic perturbations and high-throughput measurements provide insights into multiple regimes of the stress response. Using a systems approach, we decipher molecular mechanisms across these regimes. Significantly, our study shows that heme oxygenase-1 (HMOX1) acts as a gatekeeper of cell fate decisions. Specifically, HP treatment of HMOX1 knockdown cells reversed the gene expression of about 51% of 2,892 differentially expressed genes when treated with HP alone, affecting a variety of cellular processes, including anti-oxidant response, inflammation, DNA injury and repair, cell cycle and growth, mitochondrial stress, metabolic stress, and autophagy. Further analysis revealed that these switched genes were highly enriched in three spatial locations viz., cell surface, mitochondria, and nucleus. In particular, it revealed the novel roles of HMOX1 on cell surface receptors EGFR and IGFR, mitochondrial ETCs (MTND3, MTATP6), and epigenetic regulation through chromatin modifiers (KDM6A, RBBP5, and PPM1D) and long non-coding RNA (lncRNAs) in orchestrating the cell fate at the boundary of cell survival and death. These novel aspects suggest that HMOX1 can influence transcriptional and epigenetic modulations to orchestrate OSR affecting cell fate decisions.
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Affiliation(s)
- Sindhushree Raghunandan
- Department of Bioengineering, University of California, San Diego, San Diego, CA, United States
| | - Srinivasan Ramachandran
- Department of Bioengineering, University of California, San Diego, San Diego, CA, United States
| | - Eugene Ke
- Department of Bioengineering, University of California, San Diego, San Diego, CA, United States
| | - Yifei Miao
- Department of Diabetes Complications and Metabolism, City of Hope, Duarte, CA, United States
| | - Ratnesh Lal
- Department of Bioengineering, University of California, San Diego, San Diego, CA, United States.,Department of Mechanical and Aerospace Engineering, University of California, San Diego, San Diego, CA, United States
| | - Zhen Bouman Chen
- Department of Diabetes Complications and Metabolism, City of Hope, Duarte, CA, United States
| | - Shankar Subramaniam
- Department of Bioengineering, University of California, San Diego, San Diego, CA, United States.,Department of Computer Science and Engineering, University of California, San Diego, San Diego, CA, United States.,Department of Cellular and Molecular Medicine, University of California, San Diego, San Diego, CA, United States
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13
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Cagatay E, Akyildiz V, Ergun Y, Kayali HA. Synthesis of Murrayaquinone-A Derivatives and Investigation of Potential Anticancer Properties. Chem Biodivers 2021; 18:e2100348. [PMID: 34459087 DOI: 10.1002/cbdv.202100348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Accepted: 08/27/2021] [Indexed: 12/24/2022]
Abstract
A series of novel murrayaquinone a derivatives were synthesized and their anti-cancer activity were evaluated on healthy colon cell lines (CCD-18Co), primary (Caco-2) and metastatic (DLD-1) colon cancer cell lines. The results showed that the cytotoxicity of murrayaquinone molecules is significantly high even in micromolar levels. The DNA binding, cell cycle arrest and metabolic activity studies of these molecules were also carried out and the results showed that these molecules induce apoptosis. In conclusion, the data support further studies on murrayaquinone derivatives toward selection of a candidate for cancer treatment.
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Affiliation(s)
- Elcin Cagatay
- Izmir International Biomedicine and Genome Institute, Dokuz Eylül University, 35340, Izmir, Turkey.,Izmir Biomedicine and Genome Center, 35340, Izmir, Turkey
| | - Volkan Akyildiz
- Department of Chemistry, Faculty of Science, Atatürk University, Erzurum, Turkey
| | - Yavuz Ergun
- Department of Chemistry, Faculty of Science, Dokuz Eylül University, 35160, Izmir, Turkey
| | - Hulya Ayar Kayali
- Izmir International Biomedicine and Genome Institute, Dokuz Eylül University, 35340, Izmir, Turkey.,Izmir Biomedicine and Genome Center, 35340, Izmir, Turkey.,Department of Chemistry, Faculty of Science, Dokuz Eylül University, 35160, Izmir, Turkey
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14
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Hossain M, Regassa A, Amarakoon S, Jayaraman B, Akhtar N, Li J, Karmin O, Nyachoti C. The effect of epidermal growth factor on performance and oxidative stress in piglets challenged with enterotoxigenic Escherichia coli K88. CANADIAN JOURNAL OF ANIMAL SCIENCE 2021. [DOI: 10.1139/cjas-2020-0192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study evaluated the efficacy of epidermal growth factor (EGF) in piglets challenged with enterotoxigenic Escherichia coli K88 (ETEC). A total of 28 piglets were assigned to the following dietary treatments for 14 d: negative control (NC) (basal diet containing supernatant without EGF), PC (NC + 2.5 g antibiotic·kg−1 feed), EGF120 [basal diet + supernatant with 120 μg EGF·kg−1 body weight (BW)·d−1], and EGF180 (basal diet + supernatant with 180 μg EGF·kg−1 BW·d−1). After a 6 d acclimation period, each pig was gavaged with 6 mL (2.4 × 1013 cfu·mL−1) of ETEC on the morning of day 7. Overall, piglets fed the EGF and PC diets tended to have higher gain to feed ratio than those fed the NC diet (P = 0.063). Pigs fed EGF diets had lower rectal temperature than those fed the NC diet at 6 h after challenge (P < 0.05). Serum and ileal malondialdehyde concentrations were higher in piglets fed the NC diet compared with those fed EGF and PC diets on days 6 and 7 after challenge, respectively (P < 0.05). In conclusion, EGF has the potential to reduce oxidative stress and body temperature elevation in piglets exposed to ETEC while supporting better feed efficiency.
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Affiliation(s)
- M.M. Hossain
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - A. Regassa
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - S. Amarakoon
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - B. Jayaraman
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - N. Akhtar
- Department of Animal Biosciences, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - J. Li
- Department of Animal Biosciences, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - O. Karmin
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - C.M. Nyachoti
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
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15
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Zhu W, Fang T, Zhang W, Liang A, Zhang H, Zhang ZP, Zhang XE, Li F. A ROS scavenging protein nanocage for in vitro and in vivo antioxidant treatment. NANOSCALE 2021; 13:4634-4643. [PMID: 33616146 DOI: 10.1039/d0nr08878a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Elevated levels of reactive oxygen species (ROS) are implicated in the onset and progression of many diseases, e.g., virus infection, ischemic stroke and neurodegenerative diseases. ROS-scavenging nanomaterials have attracted particular interest. Here, we report the development of a natural protein nanocage named Dps for in vitro and in vivo antioxidant treatment by inhibiting the Fenton reaction, a critical step in ROS generation and interconversion. Systematic surface engineering enabled cell penetration, good colloidal stability, and facile purification of Dps. With its intrinsic ferroxidase activity consuming both H2O2 and Fe2+, Dps not only protects human cells from oxidative stress but also effectively alleviates ROS-induced inflammation in a mouse dermatitis model. The protection is triggered by elevated H2O2 and thereby, in principle, avoids ROS imbalances. Thus, Dps has potential as a new bionano platform for different purposes, such as antiaging, anti-inflammation and cosmetics.
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Affiliation(s)
- Weiwei Zhu
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, 430071, China. and University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ti Fang
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, 430071, China.
| | - Wenjing Zhang
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, 430071, China. and University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ao Liang
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, 430071, China. and University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Hui Zhang
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, 430071, China.
| | - Zhi-Ping Zhang
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, 430071, China.
| | - Xian-En Zhang
- University of Chinese Academy of Sciences, Beijing, 100049, China and National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Feng Li
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, 430071, China. and University of Chinese Academy of Sciences, Beijing, 100049, China
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16
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Cytotoxic Mechanism of Sphaerodactylomelol, an Uncommon Bromoditerpene Isolated from Sphaerococcus coronopifolius. Molecules 2021; 26:molecules26051374. [PMID: 33806445 PMCID: PMC7961984 DOI: 10.3390/molecules26051374] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 02/21/2021] [Accepted: 02/26/2021] [Indexed: 11/17/2022] Open
Abstract
Marine natural products have exhibited uncommon chemical structures with relevant antitumor properties highlighting their potential to inspire the development of new anticancer agents. The goal of this work was to study the antitumor activities of the brominated diterpene sphaerodactylomelol, a rare example of the dactylomelane family. Cytotoxicity (10-100 µM; 24 h) was evaluated on tumor cells (A549, CACO-2, HCT-15, MCF-7, NCI-H226, PC-3, SH-SY5Y, SK-ML-28) and the effects estimated by MTT assay. Hydrogen peroxide (H2O2) levels and apoptosis biomarkers (membrane translocation of phosphatidylserine, depolarization of mitochondrial membrane potential, Caspase-9 activity, and DNA condensation and/or fragmentation) were studied in the breast adenocarcinoma cellular model (MCF-7) and its genotoxicity on mouse fibroblasts (L929). Sphaerodactylomelol displayed an IC50 range between 33.04 and 89.41 µM without selective activity for a specific tumor tissue. The cells' viability decrease was accompanied by an increase on H2O2 production, a depolarization of mitochondrial membrane potential and an increase of Caspase-9 activity and DNA fragmentation. However, the DNA damage studies in L929 non-malignant cell line suggested that this compound is not genotoxic for normal fibroblasts. Overall, the results suggest that the cytotoxicity of sphaerodactylomelol seems to be mediated by an increase of H2O2 levels and downstream apoptosis.
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17
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Mao F, Liu K, Wong NK, Zhang X, Yi W, Xiang Z, Xiao S, Yu Z, Zhang Y. Virulence of Vibrio alginolyticus Accentuates Apoptosis and Immune Rigor in the Oyster Crassostrea hongkongensis. Front Immunol 2021; 12:746017. [PMID: 34621277 PMCID: PMC8490866 DOI: 10.3389/fimmu.2021.746017] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 08/31/2021] [Indexed: 02/05/2023] Open
Abstract
Vibrio species are ubiquitously distributed in marine environments, with important implications for emerging infectious diseases. However, relatively little is known about defensive strategies deployed by hosts against Vibrio pathogens of distinct virulence traits. Being an ecologically relevant host, the oyster Crassostrea hongkongensis can serve as an excellent model for elucidating mechanisms underlying host-Vibrio interactions. We generated a Vibrio alginolyticus mutant strain (V. alginolyticus△vscC ) with attenuated virulence by knocking out the vscC encoding gene, a core component of type III secretion system (T3SS), which led to starkly reduced apoptotic rates in hemocyte hosts compared to the V. alginolyticusWT control. In comparative proteomics, it was revealed that distinct immune responses arose upon encounter with V. alginolyticus strains of different virulence. Quite strikingly, the peroxisomal and apoptotic pathways are activated by V. alginolyticusWT infection, whereas phagocytosis and cell adhesion were enhanced in V. alginolyticus△vscC infection. Results for functional studies further show that V. alginolyticusWT strain stimulated respiratory bursts to produce excess superoxide (O2•-) and hydrogen peroxide (H2O2) in oysters, which induced apoptosis regulated by p53 target protein (p53tp). Simultaneously, a drop in sGC content balanced off cGMP accumulation in hemocytes and repressed the occurrence of apoptosis to a certain extent during V. alginolyticus△vscC infection. We have thus provided the first direct evidence for a mechanistic link between virulence of Vibrio spp. and its immunomodulation effects on apoptosis in the oyster. Collectively, we conclude that adaptive responses in host defenses are partially determined by pathogen virulence, in order to safeguard efficiency and timeliness in bacterial clearance.
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Affiliation(s)
- Fan Mao
- Chinese Academy of Sciences Key Laboratory of Tropical Marine Bio-resources and Ecology and Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
| | - Kunna Liu
- Chinese Academy of Sciences Key Laboratory of Tropical Marine Bio-resources and Ecology and Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Nai-Kei Wong
- Chinese Academy of Sciences Key Laboratory of Tropical Marine Bio-resources and Ecology and Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China
- Department of Pharmacology, Shantou University Medical College, Shantou, China
| | - Xiangyu Zhang
- Chinese Academy of Sciences Key Laboratory of Tropical Marine Bio-resources and Ecology and Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Wenjie Yi
- Chinese Academy of Sciences Key Laboratory of Tropical Marine Bio-resources and Ecology and Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Zhiming Xiang
- Chinese Academy of Sciences Key Laboratory of Tropical Marine Bio-resources and Ecology and Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
| | - Shu Xiao
- Chinese Academy of Sciences Key Laboratory of Tropical Marine Bio-resources and Ecology and Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
| | - Ziniu Yu
- Chinese Academy of Sciences Key Laboratory of Tropical Marine Bio-resources and Ecology and Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- *Correspondence: Yang Zhang, ; Ziniu Yu,
| | - Yang Zhang
- Chinese Academy of Sciences Key Laboratory of Tropical Marine Bio-resources and Ecology and Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- *Correspondence: Yang Zhang, ; Ziniu Yu,
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18
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Nimalasena S, Gothard L, Anbalagan S, Allen S, Sinnett V, Mohammed K, Kothari G, Musallam A, Lucy C, Yu S, Nayamundanda G, Kirby A, Ross G, Sawyer E, Castell F, Cleator S, Locke I, Tait D, Westbury C, Wolstenholme V, Box C, Robinson SP, Yarnold J, Somaiah N. Intratumoral Hydrogen Peroxide With Radiation Therapy in Locally Advanced Breast Cancer: Results From a Phase 1 Clinical Trial. Int J Radiat Oncol Biol Phys 2020; 108:1019-1029. [PMID: 32585332 DOI: 10.1016/j.ijrobp.2020.06.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 06/09/2020] [Accepted: 06/12/2020] [Indexed: 12/15/2022]
Abstract
PURPOSE Hydrogen peroxide (H2O2) plays a vital role in normal cellular processes but at supraphysiological concentrations causes oxidative stress and cytotoxicity, a property that is potentially exploitable for the treatment of cancer in combination with radiation therapy (RT). We report the first phase 1 trial testing the safety and tolerability of intratumoral H2O2 + external beam RT as a novel combination in patients with breast cancer and exploratory plasma marker analyses investigating possible mechanisms of action. METHODS AND MATERIALS Twelve patients with breast tumors ≥3 cm (surgically or medically inoperable) received intratumoral H2O2 with either 36 Gy in 6 twice-weekly fractions (n = 6) or 49.5 Gy in 18 daily fractions (n = 6) to the whole breast ± locoregional lymph nodes in a single-center, nonrandomized study. H2O2 was mixed in 1% sodium hyaluronate gel (final H2O2 concentration 0.5%) before administration to slow drug release and minimize local discomfort. The mixture was injected intratumorally under ultrasound guidance twice weekly 1 hour before RT. The primary endpoint was patient-reported maximum intratumoral pain intensity before and 24 hours postinjection. Secondary endpoints included grade ≥3 skin toxicity and tumor response by ultrasound. Blood samples were collected before, during, and at the end of treatment for cell-death and immune marker analysis. RESULTS Compliance with H2O2 and RT was 100%. Five of 12 patients reported moderate pain after injection (grade 2 Common Terminology Criteria for Adverse Events v4.02) with median duration 60 minutes (interquartile range, 20-120 minutes). Skin toxicity was comparable to RT alone, with maintained partial/complete tumor response relative to baseline in 11 of 12 patients at last follow-up (median 12 months). Blood marker analysis highlighted significant associations of TRAIL, IL-1β, IL-4, and MIP-1α with tumor response. CONCLUSIONS Intratumoral H2O2 with RT is well tolerated with no additional toxicity compared with RT alone. If efficacy is confirmed in a randomized phase 2 trial, the approach has potential as a cost-effective radiation response enhancer in multiple cancer types in which locoregional control after RT alone remains poor.
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MESH Headings
- Aged
- Aged, 80 and over
- Biomarkers, Tumor/blood
- Breast Neoplasms/blood
- Breast Neoplasms/diagnostic imaging
- Breast Neoplasms/pathology
- Breast Neoplasms/therapy
- Breast Neoplasms, Male/blood
- Breast Neoplasms, Male/pathology
- Breast Neoplasms, Male/therapy
- Chemokine CCL3/blood
- Chemoradiotherapy/methods
- Dose Fractionation, Radiation
- Female
- Humans
- Hyaluronic Acid/administration & dosage
- Hydrogen Peroxide/administration & dosage
- Hydrogen Peroxide/adverse effects
- Injections, Intralesional/adverse effects
- Injections, Intralesional/methods
- Interleukin-1beta/blood
- Interleukin-4/blood
- Lymphatic Irradiation
- Male
- Middle Aged
- Oxidants/administration & dosage
- Oxidants/adverse effects
- Pain Measurement
- Pain, Procedural/chemically induced
- Radiodermatitis/pathology
- Skin/drug effects
- TNF-Related Apoptosis-Inducing Ligand/blood
- Ultrasonography, Interventional
- Viscosupplements/administration & dosage
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Affiliation(s)
- Samantha Nimalasena
- Division of Radiotherapy and Imaging, the Institute of Cancer Research, London, UK; The Royal Marsden NHS Foundation Trust, London, UK
| | - Lone Gothard
- Division of Radiotherapy and Imaging, the Institute of Cancer Research, London, UK
| | - Selvakumar Anbalagan
- Division of Radiotherapy and Imaging, the Institute of Cancer Research, London, UK
| | - Steven Allen
- The Royal Marsden NHS Foundation Trust, London, UK
| | | | | | | | | | - Claire Lucy
- The Royal Marsden NHS Foundation Trust, London, UK
| | - Sheng Yu
- Division of Radiotherapy and Imaging, the Institute of Cancer Research, London, UK
| | - Gift Nayamundanda
- Division of Radiotherapy and Imaging, the Institute of Cancer Research, London, UK
| | - Anna Kirby
- Division of Radiotherapy and Imaging, the Institute of Cancer Research, London, UK; The Royal Marsden NHS Foundation Trust, London, UK
| | - Gill Ross
- The Royal Marsden NHS Foundation Trust, London, UK
| | - Elinor Sawyer
- Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Fiona Castell
- King's College Hospital NHS Foundation Trust, London, UK
| | | | - Imogen Locke
- The Royal Marsden NHS Foundation Trust, London, UK
| | - Diana Tait
- The Royal Marsden NHS Foundation Trust, London, UK
| | | | | | - Carol Box
- Division of Radiotherapy and Imaging, the Institute of Cancer Research, London, UK
| | - Simon P Robinson
- Division of Radiotherapy and Imaging, the Institute of Cancer Research, London, UK
| | - John Yarnold
- Division of Radiotherapy and Imaging, the Institute of Cancer Research, London, UK; The Royal Marsden NHS Foundation Trust, London, UK
| | - Navita Somaiah
- Division of Radiotherapy and Imaging, the Institute of Cancer Research, London, UK; The Royal Marsden NHS Foundation Trust, London, UK.
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19
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Amyloid β chaperone - lipocalin-type prostaglandin D synthase acts as a peroxidase in the presence of heme. Biochem J 2020; 477:1227-1240. [PMID: 32271881 PMCID: PMC7148433 DOI: 10.1042/bcj20190536] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 02/07/2020] [Accepted: 02/12/2020] [Indexed: 12/01/2022]
Abstract
The extracellular transporter, lipocalin-type prostaglandin D synthase (L-PGDS) binds to heme and heme metabolites with high affinity. It has been reported that L-PGDS protects neuronal cells against apoptosis induced by exposure to hydrogen peroxide. Our study demonstrates that when human WT L-PGDS is in complex with heme, it exhibits a strong peroxidase activity thus behaving as a pseudo-peroxidase. Electron paramagnetic resonance studies confirm that heme in the L-PGDS–heme complex is hexacoordinated with high-spin Fe(III). NMR titration of heme in L-PGDS points to hydrophobic interaction between heme and several residues within the β-barrel cavity of L-PGDS. In addition to the transporter function, L-PGDS is a key amyloid β chaperone in human cerebrospinal fluid. The presence of high levels of bilirubin and its derivatives, implicated in Alzheimer's disease, by binding to L-PGDS may reduce its chaperone activity. Nevertheless, our ThT binding assay establishes that heme and heme metabolites do not significantly alter the neuroprotective chaperone function of L-PGDS. Guided by NMR data we reconstructed the heme L-PGDS complex using extensive molecular dynamics simulations providing a platform for mechanistic interpretation of the catalytic and transporting functions and their modulation by secondary ligands like Aβ peptides and heme metabolites.
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20
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Apoptotic Markers Are Increased in Epilepsy Patients: A Relation with Manganese Superoxide Dismutase Ala16Val Polymorphism and Seizure Type through IL-1 β and IL-6 Pathways. BIOMED RESEARCH INTERNATIONAL 2020; 2020:6250429. [PMID: 32219137 PMCID: PMC7079223 DOI: 10.1155/2020/6250429] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 02/11/2020] [Accepted: 02/26/2020] [Indexed: 01/23/2023]
Abstract
The MnSOD Ala16Val single nucleotide polymorphism (SNP) has been associated with different diseases. However, there are scarcely studies relating this SNP in epilepsy, a neurologic disease that involves some interacting pathways, such as apoptotic and inflammatory factors. In this sense, we decided to investigate the relationship of MnSOD Ala16Val SNP with apoptotic markers in epilepsy and its relation with inflammatory pathway and seizure type. Ninety subjects were evaluated (47 epilepsies; 43 controls) by questionnaires and laboratorial exams. We observed a higher percentage of VV genotype in the epilepsy group when compared to the control group. IL-1β, IL-6, caspase-1, and caspase-3 levels were increased in the epilepsy group (VV genotype). Furthermore, an important correlation between IL-1β vs. caspase-1 and IL-6 vs. caspase-3 was observed in the epilepsy group (VV genotype). The epilepsy group which presented generalized seizures also demonstrated a positive correlation between IL-1β vs. CASP1 and IL-6 vs. CASP3. Thus, it is a plausible propose that epilepsy patients with VV genotype and generalized seizures present a worse inflammatory and apoptotic status. Our findings suggest that the knowledge of MnSOD Ala16Val polymorphism existence is important to evaluate molecular mechanisms associated to seizure and improve the treatment of these patients.
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21
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Clement M, Luo L. Organismal Aging and Oxidants beyond Macromolecules Damage. Proteomics 2020; 20:e1800400. [DOI: 10.1002/pmic.201800400] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 10/20/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Marie‐Veronique Clement
- Department of BiochemistryYong Loo Lin School of MedicineNational University of Singapore Singapore 117596 Singapore
- National University of Singapore Graduate School for Integrative Sciences and Engineering Singapore 117456 Singapore
| | - Le Luo
- Department of BiochemistryYong Loo Lin School of MedicineNational University of Singapore Singapore 117596 Singapore
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22
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Jo SM, Wurm FR, Landfester K. Oncolytic Nanoreactors Producing Hydrogen Peroxide for Oxidative Cancer Therapy. NANO LETTERS 2020; 20:526-533. [PMID: 31789526 DOI: 10.1021/acs.nanolett.9b04263] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
In situ generation of anticancer agents at the place of the disease is a new paradigm for cancer therapy. The production of highly potent drugs by nanoreactors through a facile synthesis pathway is demanded. We report an oncolytic nanoreactor platform loaded with the enzyme glucose oxidase (GOX) to produce hydrogen peroxide. For the first time, we realized a core-shell structure with encapsulated GOX under mild synthetic conditions, which ensured high remaining activity of GOX inside of the nanoreactor. Moreover, the nanoreactor protected the loaded GOX from proteolysis and contributed to increased thermal stability of the enzyme. The nanoreactors were effectively taken up into different cancer cells, in which they produced hydrogen peroxide by consuming intracellular glucose and oxygen, thereby leading to effective death of the cancer cells. In summary, our robust nanoreactors are a promising platform for effective anticancer therapy and sustained enzyme utilization.
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Affiliation(s)
- Seong-Min Jo
- Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany
| | - Frederik R Wurm
- Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany
| | - Katharina Landfester
- Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany
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23
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Hirpara JL, Subramaniam K, Bellot G, Qu J, Seah S, Loh T, Tucker-Kellogg L, Clement MV, Pervaiz S. Superoxide induced inhibition of death receptor signaling is mediated via induced expression of apoptosis inhibitory protein cFLIP. Redox Biol 2019; 30:101403. [PMID: 31954371 PMCID: PMC6965745 DOI: 10.1016/j.redox.2019.101403] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 11/28/2019] [Accepted: 12/07/2019] [Indexed: 12/16/2022] Open
Abstract
The death inhibitory proteins, cFLIP and Bcl-2, canonically act at different steps to regulate receptor-mediated apoptosis in cancer cells. Here we report that pharmacological or genetic means to effect an increase in intracellular superoxide result in cFLIP upregulation. Interestingly, Bcl-2 overexpression is associated with a concomitant increase in cFLIP, and reducing superoxide sensitizes Bcl-2 overexpressing cancer cells to receptor-mediated apoptosis via downregulation of cFLIP. Moreover, inhibiting glycolytic flux overcomes apoptosis resistance by superoxide-dependent downregulation of cFLIP. Superoxide-induced upregulation of cFLIP is a function of enhanced transcription, as evidenced by increases in cFLIP promoter activity and mRNA abundance. The positive effect of superoxide on cFLIP is mediated through its reaction with nitric oxide to generate peroxynitrite. Corroborating these findings in cell lines, subjecting primary cells derived from lymphoma patients to glucose deprivation ex vivo, as a means to decrease superoxide, not only reduced cFLIP expression but also significantly enhanced death receptor sensitivity. Based on this novel mechanistic insight into the redox regulation of cancer cell fate, modulation of intracellular superoxide could have potential therapeutic implications in cancers in which these two death inhibitory proteins present a therapeutic challenge.
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Affiliation(s)
| | | | - Gregory Bellot
- Department of Hand & Reconstructive Microsurgery, University Orthopedic, Hand & Reconstructive Microsurgery Cluster, National University Health System, Singapore
| | - Jianhua Qu
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Serena Seah
- Cancer Science Institute, National University of Singapore, Singapore
| | - Thomas Loh
- Department of Otolaryngology, National University Health System, Singapore
| | - Lisa Tucker-Kellogg
- Cancer and Stem Cell Biology Program, Duke-NUS Graduate Medical School, Singapore
| | - Marie-Veronique Clement
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore; Medical Science Cluster Cancer Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; National University Cancer Institute, National University Health System, Singapore.
| | - Shazib Pervaiz
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore; Medical Science Cluster Cancer Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; National University Cancer Institute, National University Health System, Singapore.
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Tang W, Chen O, Yao F, Cui L. miR‑455 targets FABP4 to protect human endometrial stromal cells from cytotoxicity induced by hydrogen peroxide. Mol Med Rep 2019; 20:4781-4790. [PMID: 31638263 PMCID: PMC6854537 DOI: 10.3892/mmr.2019.10727] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 04/04/2019] [Indexed: 01/03/2023] Open
Abstract
Oxidative stress and dysregulation of antioxidant systems are associated with various complications in pregnancy. Endometriosis is a common gynecologic disease that affects women of reproductive age. Recent studies have indicated that oxidative stress may be involved in the pathophysiology of endometriosis. It has been reported that microRNAs can regulate the cellular response to oxidative stress, and mounting evidence indicates that fatty acid binding protein 4 (FABP4) plays an essential role in the regulation of systemic redox capacity. In the present study, we demonstrated that miR-455 is a putative FABP4-targeting miRNA. A luciferase activity assay revealed that miR-455 can successfully bind to the 3′-UTR of FABP4. Overexpression of miR-455 led to the downregulation of FABP4 at both the mRNA and protein levels in a human endometrial stromal cell line. Then, the roles of miR-455 and FABP4 in oxidative stress induced by hydrogen peroxide (H2O2) in human endometrial stromal cells were examined. We found that ectopic expression of miR-455 protected cells from damage caused by H2O2. Further investigation found that forced expression of miR-455 reduced the level of reactive oxygen species (ROS) and malondialdehyde (MDA), while the activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) were promoted. Silencing of FABP4 also generated cytoprotective effects against H2O2 in human endometrial stromal cells. Moreover, overexpression FABP4 abrogated the miR-455-mediated antioxidative stress effects in cells. Taken together, we propose that miR-455 protects human endometrial stromal cells from oxidative stress at least partly via regulation of FABP4.
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Affiliation(s)
- Wenbo Tang
- Department of Obstetrics and Gynecology, Ningbo First Hospital, Ningbo, Zhejiang 315000, P.R. China
| | - Oujing Chen
- Department of Obstetrics and Gynecology, Ningbo First Hospital, Ningbo, Zhejiang 315000, P.R. China
| | - Fengxiang Yao
- Department of Obstetrics and Gynecology, Ningbo First Hospital, Ningbo, Zhejiang 315000, P.R. China
| | - Lining Cui
- Department of Obstetrics and Gynecology, Ningbo First Hospital, Ningbo, Zhejiang 315000, P.R. China
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25
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Larrea tridentata Extract Mitigates Oxidative Stress-Induced Cytotoxicity in Human Neuroblastoma SH-SY5Y Cells. Antioxidants (Basel) 2019; 8:antiox8100427. [PMID: 31557847 PMCID: PMC6827101 DOI: 10.3390/antiox8100427] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Revised: 09/19/2019] [Accepted: 09/23/2019] [Indexed: 12/12/2022] Open
Abstract
Creosote bush (Larrea tridentata; LT) leaves extracts were tested for their potential efficacy to mitigate cellular oxidative stress on human SH-SY5Y cells. Here, the differential nuclear staining assay, a bioimager system, and flow cytometric protocols, concurrently with several specific chemicals, were used to measure the percentage of cell viability and several facets implicated in the cytoprotective mechanism of LT extracts. Initially, three LT extracts, prepared with different solvents, ethanol, ethanol:water (e/w), and water, were tested for their capacity to rescue the viability of cells undergoing aggressive H2O2-induced oxidative stress. Results indicate that the LT extract prepared with a mixture of ethanol:water (LT-e/w; 60:40% v/v) displayed the most effective cytoprotection rescue activity. Interestingly, by investigating the LT-e/w mechanism of action, it was found that LT-e/w extract decreases the levels of H2O2-provoked reactive oxidative species (ROS) accumulation, mitochondrial depolarization, phosphatidylserine externalization, caspase-3/7 activation, and poly (ADP-ribose) polymerase (PARP) cleavage significantly, which are hallmarks of apoptosis. Thus, out of the three LT extracts tested, our findings highlight that the LT-e/w extract was the most effective protective reagent on SH-SY5Y cells undergoing oxidative stress in vitro, functioning as a natural anti-apoptotic extract. These findings warrant further LT-e/w extract examination in a holistic context.
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26
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Parsa Khankandi H, Behzad S, Mojab F, Ahmadian-Attari MM, Sahranavard S. Effects of Some Lamiaceae Species on NO Production and Cell Injury in Hydrogen Peroxide-induced Stress. IRANIAN JOURNAL OF PHARMACEUTICAL RESEARCH : IJPR 2019; 18:826-835. [PMID: 31531065 PMCID: PMC6706754 DOI: 10.22037/ijpr.2019.1100685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Nitric oxide (NO) is a key mediator that plays an important role in pathogenesis of various chronic diseases like Alzheimer’s disease and Parkinson’s disease. Additionally, there is a great attitude for finding natural compounds, which could control and inhibit NO production in pathological conditions. Therefore, we were encouraged to investigate the effects of some Lamiaceae species on NO production and cell injury during oxidative stress in PC12 cells. In this study, cell death determined by MTT assay and NO levels were evaluated using Griess assay. PC12 cells were exposed to total metanolic extracts of three Scutellaria and one Nepeta species. The results revealed that Nepeta laxiflora (N. laxiflora) could protect PC12 cells from hydrogen proxide-induced oxidative stress and all of the plants inhibited NO production in that condition except Scutellaria tournefortii (Sc. tournefortii). In addition, Scutellaria multicaulis (Sc. multicaulis) was meanwhile subjected to fractionation using different organic solvents. The dichloromethan and ethyl acetate fractions of Sc. multicaulis could protect PC12 cells from oxidative stress injury. However, NO production was restrained by the hexane and dichloromethane fractions. Considering the results, N. laxiflora, Scutellaria nepetifolia (Sc. nepetifolia), and Sc. multicaulis are good candidates for further investigations in neuroprotection and anti-inflammation studies.
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Affiliation(s)
- Hamed Parsa Khankandi
- Department of Pharmacognosy, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sahar Behzad
- Department of Pharmacognosy, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Evidence-based Phytotherapy and Complementary Medicine Research Center, Alborz University of Medical Sciences, Karaj, Iran
| | - Faraz Mojab
- Department of Pharmacognosy, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Mahdi Ahmadian-Attari
- Evidence-based Phytotherapy and Complementary Medicine Research Center, Alborz University of Medical Sciences, Karaj, Iran
| | - Shamim Sahranavard
- Traditional Medicine and Materia Medica Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Department of Traditional Pharmacy, School of Traditional Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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27
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Gu M, Zeng Z, Xing M, Xiong Y, Deng Z, Chen S, Wang L. The Biological Applications of Two Aggregation-Induced Emission Luminogens. Biotechnol J 2019; 14:e1900212. [PMID: 31469239 DOI: 10.1002/biot.201900212] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 07/16/2019] [Indexed: 02/06/2023]
Abstract
Fluorescence imaging, as a commonly used scientific tool, is widely applied in various biomedical and material structures through visualization technology. Highly selective and sensitive luminescent biological probes, as well as those with good water solubility, are urgently needed for biomedical research. In contrast to the traditional aggregation-caused quenching of fluorescence, in the unique phenomenon of aggregation-induced emission (AIE), the individual luminogens have extremely weak or no emissivity because they each have free intramolecular motion; however, when they form aggregates, these components immediately "light up". Since the discovery of "turn-on" mechanism, researchers have been studying and applying AIE in a variety of fields to develop more sensitive, selective, and efficient strategies for the AIE dyes. There are numerous advantages to the use of AIE-based methods, including low background interference, strong contrast, high performance in intracellular imaging, and the ability for long-term monitoring in vivo. In this review, two typical examples of AIEgens, TPE-Cy and TPE-Ph-In, are described, including their structure properties and applications. Recent progress in the biological applications is mainly focused on. Undoubtedly, in the near future, an increasing number of encouraging and practical ideas will promote the development of more AIEgens for broad use in biomedical applications.
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Affiliation(s)
- Meijia Gu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, 430071, Wuhan, China.,Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, Hubei, China
| | - Zixuan Zeng
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, 430071, Wuhan, China
| | - Mai Xing
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, 430071, Wuhan, China
| | - Yige Xiong
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, 430071, Wuhan, China
| | - Zixin Deng
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, 430071, Wuhan, China
| | - Shi Chen
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, 430071, Wuhan, China.,Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, Hubei, China
| | - Lianrong Wang
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, 430071, Wuhan, China.,Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, Hubei, China
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28
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A defect in the peroxisomal biogenesis in germ cells induces a spermatogenic arrest at the round spermatid stage in mice. Sci Rep 2019; 9:9553. [PMID: 31267012 PMCID: PMC6606614 DOI: 10.1038/s41598-019-45991-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Accepted: 06/18/2019] [Indexed: 12/14/2022] Open
Abstract
Peroxisomes are involved in the degradation of very long-chain fatty acids (VLCFAs) by β-oxidation. Besides neurological defects, peroxisomal dysfunction can also lead to testicular abnormalities. However, underlying alterations in the testes due to a peroxisomal defect are not well characterized yet. To maintain all metabolic functions, peroxisomes require an import machinery for the transport of matrix proteins. One component of this translocation machinery is PEX13. Its inactivation leads to a peroxisomal biogenesis defect. We have established a germ cell-specific KO of Pex13 to study the function of peroxisomes during spermatogenesis in mice. Exon 2 of floxed Pex13 was specifically excised in germ cells prior to meiosis by using a transgenic mouse strain carrying a STRA8 inducible Cre recombinase. Germ cell differentiation was interrupted at the round spermatid stage in Pex13 KO mice with formation of multinucleated giant cells (MNCs) and loss of mature spermatids. Due to a different cellular content in the germinal epithelium of Pex13 KO testes compared to control, whole testes biopsies were used for the analyses. Thus, differences in lipid composition and gene expression are only shown for whole testicular tissue but cannot be limited to single cells. Gas chromatography revealed an increase of shorter fatty acids and a decrease of n-6 docosapentaenoic acid (C22:5n-6) and n-3 docosahexaenoic acid (C22:6n-3), the main components of sperm plasma membranes. Representative genes of the metabolite transport and peroxisomal β-oxidation were strongly down-regulated. In addition, structural components of the blood-testis barrier (BTB) were altered. To conclude, defects in the peroxisomal compartment interfere with normal spermatogenesis.
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29
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Sadeghi Mohammadi S, Vaezi Z, Shojaedin-Givi B, Naderi-Manesh H. Chemiluminescent liposomes as a theranostic carrier for detection of tumor cells under oxidative stress. Anal Chim Acta 2019; 1059:113-123. [DOI: 10.1016/j.aca.2019.01.045] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 01/20/2019] [Accepted: 01/23/2019] [Indexed: 10/27/2022]
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30
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Wang M, Jiang S, Yu F, Zhou L, Wang K. Noncoding RNAs as Molecular Targets of Resveratrol Underlying Its Anticancer Effects. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:4709-4719. [PMID: 30990036 DOI: 10.1021/acs.jafc.9b01667] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Cancer is a significant disease burden worldwide. Chemotherapy is the mainstay of cancer treatment. Clinically used chemotherapeutic agents may elicit severe side effects. Remarkably, most of cancer cells develop chemoresistance after a period of treatment. Therefore, it is imperative to seek more effective agents without side effects. In recent years, increasing research efforts have attempted to identify natural agents that may be used alone or in combination with traditional therapeutics for cancer management. Resveratrol is a natural polyphenolic phytoalexin that can be found in various foods including blueberries, peanuts, and red wine. As a natural food ingredient, resveratrol possesses antioxidant, anti-inflammatory, and cardioprotective properties. Moreover, resveratrol exhibited promising effects in suppressing the initiation and progression of cancers. Noncoding RNAs (ncRNAs) have been universally accepted as vital regulators in cancer pathogenesis. The modulation of miRNAs and lncRNAs by resveratrol has been described. Thus, the mechanism involving the domination of ncRNA function is one of the keys to understand the anticancer effects of resveratrol. In this review, we focus on the antagonistic effects of resveratrol on cancer progression through regulation of miRNAs and lncRNAs. We also discuss the potential application of resveratrol in cancer management.
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Affiliation(s)
- Man Wang
- Institute for Translational Medicine , Medical College of Qingdao University , Dengzhou Road 38 , Qingdao 266021 , China
| | - Shuai Jiang
- Key Laboratory of Experimental Marine Biology , Institute of Oceanology, Chinese Academy of Sciences , Qingdao 266071 , China
| | - Fei Yu
- Institute for Translational Medicine , Medical College of Qingdao University , Dengzhou Road 38 , Qingdao 266021 , China
| | - Li Zhou
- Animal Biosafety Level III Laboratory at the Center for Animal Experiment , Wuhan University School of Medicine , Wuhan 430071 , China
| | - Kun Wang
- Institute for Translational Medicine , Medical College of Qingdao University , Dengzhou Road 38 , Qingdao 266021 , China
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31
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Anasooya Shaji C, Robinson BD, Yeager A, Beeram MR, Davis ML, Isbell CL, Huang JH, Tharakan B. The Tri-phasic Role of Hydrogen Peroxide in Blood-Brain Barrier Endothelial cells. Sci Rep 2019; 9:133. [PMID: 30644421 PMCID: PMC6333800 DOI: 10.1038/s41598-018-36769-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 11/21/2018] [Indexed: 12/11/2022] Open
Abstract
Hydrogen peroxide (H2O2) plays an important role physiologically as the second messenger and pathologically as an inducer of oxidative stress in injury, ischemia and other conditions. However, it is unclear how H2O2 influences various cellular functions in health and disease differentially, particularly in the blood-brain barrier (BBB). We hypothesized that the change in cellular concentrations of H2O2 is a major contributor in regulation of angiogenesis, barrier integrity/permeability and cell death/apoptosis in BBB endothelial cells. Rat brain microvascular endothelial cells were exposed to various concentrations of H2O2 (1 nM to 25 mM). BBB tight junction protein (zonula ocludens-1; ZO-1) localization and expression, cytoskeletal organization, monolayer permeability, angiogenesis, cell viability and apoptosis were evaluated. H2O2 at low concentrations (0.001 μM to 1 μM) increased endothelial cell tube formation indicating enhanced angiogenesis. H2O2 at 100 μM and above induced monolayer hyperpermeability significantly (p < 0.05). H2O2 at 10 mM and above decreased cell viability and induced apoptosis (p < 0.05). There was a decrease of ZO-1 tight junction localization with 100 μm H2O2, but had no effect on protein expression. Cytoskeletal disorganizations were observed starting at 1 μm. In conclusion H2O2 influences angiogenesis, permeability, and cell death/apoptosis in a tri-phasic and concentration-dependent manner in microvascular endothelial cells of the blood-brain barrier.
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Affiliation(s)
- Chinchusha Anasooya Shaji
- Department of Surgery, Texas A&M University Health Science Center College of Medicine and Baylor Scott & White Health, Temple, Texas, USA
| | - Bobby D Robinson
- Department of Surgery, Texas A&M University Health Science Center College of Medicine and Baylor Scott & White Health, Temple, Texas, USA
| | - Antonia Yeager
- Department of Surgery, Texas A&M University Health Science Center College of Medicine and Baylor Scott & White Health, Temple, Texas, USA
| | - Madhava R Beeram
- Department of Pediatrics, Texas A&M University Health Science Center College of Medicine and Baylor Scott & White Health, Temple, Texas, USA
| | - Matthew L Davis
- Department of Surgery, Texas A&M University Health Science Center College of Medicine and Baylor Scott & White Health, Temple, Texas, USA
| | - Claire L Isbell
- Department of Surgery, Texas A&M University Health Science Center College of Medicine and Baylor Scott & White Health, Temple, Texas, USA
| | - Jason H Huang
- Department of Neurosurgery, Texas A&M University Health Science Center College of Medicine and Baylor Scott & White Health, Temple, Texas, USA
| | - Binu Tharakan
- Department of Surgery, Texas A&M University Health Science Center College of Medicine and Baylor Scott & White Health, Temple, Texas, USA.
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32
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Ji ST, Kim YJ, Jung SY, Kim DY, Kang S, Park JH, Jang WB, Ha J, Yun J, Kwon SM. Oleuropein attenuates hydrogen peroxide-induced autophagic cell death in human adipose-derived stem cells. Biochem Biophys Res Commun 2018; 499:675-680. [PMID: 29604275 DOI: 10.1016/j.bbrc.2018.03.211] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 03/28/2018] [Indexed: 12/11/2022]
Abstract
Mesenchymal stem cells (MSCs) are multipotent progenitor cells with self-renewing properties; thus, transplanting functionally enhanced MSCs might be a promising strategy for cell therapy against ischemic diseases. However, extensive oxidative damage in ischemic tissue affects the cell fate of transplanted MSCs, eventually resulting in cell damage and autophagic cell death. Oleuropein (OLP) is a bioactive compound isolated from olives and olive oil that harbors antioxidant properties. This study aimed to investigate the potential cytoprotective effects of OLP against oxidative stress and autophagic cell death in MSCs. We found that short-term priming with OLP attenuated H2O2-induced apoptosis by regulating the pro-apoptotic marker Bax and the anti-apoptotic markers Bcl-2 and Mcl-1. Notably, OLP inhibits H2O2 -induced autophagic cell death by modulating autophagy-related death signals, including mTOR (mammalian target of rapamycin), ULK1 (unc-51 like autophagy activating kinase 1), Beclin-1, AMPK (AMP-activated protein kinase), and LC3 (microtubule-associated protein 1a/1b-light chain 3). Our data suggest that OLP might reduce H2O2-induced autophagy and cell apoptosis in MSCs by regulating both the AMPK-ULK axis and the Bcl-2-Mcl-1 axis. Consequently, short-term cell priming with OLP might enhance the therapeutic effect of MSCs against ischemic vascular diseases, which provides an important potential improvement for emerging therapeutic strategies.
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Affiliation(s)
- Seung Taek Ji
- Laboratory for Vascular Medicine and Stem Cell Biology, Medical Research Institute, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Republic of Korea
| | - Yeon-Ju Kim
- Laboratory for Vascular Medicine and Stem Cell Biology, Medical Research Institute, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Republic of Korea
| | - Seok Yun Jung
- Laboratory for Vascular Medicine and Stem Cell Biology, Medical Research Institute, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Republic of Korea
| | - Da Yeon Kim
- Laboratory for Vascular Medicine and Stem Cell Biology, Medical Research Institute, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Republic of Korea
| | - Songhwa Kang
- Laboratory for Vascular Medicine and Stem Cell Biology, Medical Research Institute, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Republic of Korea
| | - Ji Hye Park
- Laboratory for Vascular Medicine and Stem Cell Biology, Medical Research Institute, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Republic of Korea
| | - Woong Bi Jang
- Laboratory for Vascular Medicine and Stem Cell Biology, Medical Research Institute, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Republic of Korea
| | - Jongseong Ha
- Laboratory for Vascular Medicine and Stem Cell Biology, Medical Research Institute, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Republic of Korea; Convergence Stem Cell Research Center, Pusan National University, Yangsan, Republic of Korea
| | - Jisoo Yun
- Laboratory for Vascular Medicine and Stem Cell Biology, Medical Research Institute, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Republic of Korea; Convergence Stem Cell Research Center, Pusan National University, Yangsan, Republic of Korea
| | - Sang-Mo Kwon
- Laboratory for Vascular Medicine and Stem Cell Biology, Medical Research Institute, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Republic of Korea; Convergence Stem Cell Research Center, Pusan National University, Yangsan, Republic of Korea; Research Institute of Convergence Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Republic of Korea.
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33
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Fisetin protects H9c2 cardiomyoblast cells against H2O2-induced apoptosis through Akt and ERK1/2 signaling pathways. Mol Cell Toxicol 2018. [DOI: 10.1007/s13273-018-0020-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Duan Z, Deng J, Dong Y, Zhu C, Li W, Fan D. Anticancer effects of ginsenoside Rk3 on non-small cell lung cancer cells: in vitro and in vivo. Food Funct 2018; 8:3723-3736. [PMID: 28949353 DOI: 10.1039/c7fo00385d] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Ginsenoside Rk3 (Rk3) is present in the roots of processed Panax notoginseng herbs and it exerts anti-platelet aggregation, pro-immunogenic and cardioprotective effects. However, little is known regarding the anticancer activities of this compound, especially in lung cancer. This study was designed to investigate the anticancer effects of Rk3 on non-small cell lung cancer (NSCLC) cells and in an H460 xenograft tumor model. Our results showed that Rk3 reduced cell viability, inhibited both cell proliferation and colony formation, and induced G1 phase cell cycle arrest by downregulating the expression of cyclin D1 and CDK4 and upregulating the expression of P21. Rk3 also induced apoptosis in a concentration-dependent manner in H460 and A549 cells by Annexin V/PI staining, TUNEL assay and JC-1 staining, resulting in a change in the nuclear morphology. Moreover, Rk3 induced the activation of caspase-8, -9, and -3, promoted changes in mitochondrial membrane potential, decreased the expression of Bcl-2, increased the expression of Bax, and caused the release of cytochrome c, which indicated that the apoptosis-inducing effects of Rk3 were triggered via death receptor-mediated mitochondria-dependent pathways. Furthermore, Rk3 significantly inhibited the growth of H460 xenograft tumors without an obvious effect on the body weight of the treated mice. Histological analysis indicated that Rk3 inhibited tumor growth by altering the proliferation and morphology of tumor cells. In addition, we confirmed that Rk3 inhibited angiogenesis via CD34 staining and chick embryo chorioallantoic membrane (CAM) assay in vivo. Taken together, our findings revealed not only the anticancer effect of Rk3 on NSCLC cells but also a new promising therapeutic agent for human NSCLC.
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Affiliation(s)
- Zhiguang Duan
- Shaanxi Key Laboratory of Degradable Biomedical Materials, School of Chemical Engineering, Northwest University, 229 North Taibai Road, Xi'an, Shaanxi 710069, China.
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35
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Pillarisetti S, Maya S, Sathianarayanan S, Jayakumar R. Tunable pH and redox-responsive drug release from curcumin conjugated γ-polyglutamic acid nanoparticles in cancer microenvironment. Colloids Surf B Biointerfaces 2017; 159:809-819. [DOI: 10.1016/j.colsurfb.2017.08.057] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 07/27/2017] [Accepted: 08/28/2017] [Indexed: 01/27/2023]
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36
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Zal F, Khademi F, Taheri R, Mostafavi-Pour Z. Antioxidant ameliorating effects against H2O2-induced cytotoxicity in primary endometrial cells. Toxicol Mech Methods 2017; 28:122-129. [DOI: 10.1080/15376516.2017.1372540] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- F. Zal
- Biochemistry Department, Medical School, Shiraz University of Medical Sciences, Shiraz, Iran
- Infertility Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - F. Khademi
- Biochemistry Department, Medical School, Shiraz University of Medical Sciences, Shiraz, Iran
| | - R. Taheri
- Biochemistry Department, Medical School, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Z. Mostafavi-Pour
- Biochemistry Department, Medical School, Shiraz University of Medical Sciences, Shiraz, Iran
- Recombinant Protein Lab, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran
- Maternal-Fetal Medicine Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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37
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Toh RJ, Mayorga-Martinez CC, Han J, Sofer Z, Pumera M. Group 6 Layered Transition-Metal Dichalcogenides in Lab-on-a-Chip Devices: 1T-Phase WS2 for Microfluidics Non-Enzymatic Detection of Hydrogen Peroxide. Anal Chem 2017; 89:4978-4985. [DOI: 10.1021/acs.analchem.7b00302] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Rou Jun Toh
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Science, Nanyang Technological University, 637371 Singapore
- BioSystems & Micromechanics IRG (BioSyM), Singapore-MIT Alliance for Research and Technology (SMART) Centre, S16-05-08, 3 Science Drive 2, 117543 Singapore
| | - Carmen C. Mayorga-Martinez
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Science, Nanyang Technological University, 637371 Singapore
| | - Jongyoon Han
- BioSystems & Micromechanics IRG (BioSyM), Singapore-MIT Alliance for Research and Technology (SMART) Centre, S16-05-08, 3 Science Drive 2, 117543 Singapore
- Department
of Electrical Engineering and Computer Science, Department of Biological
Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Zdenek Sofer
- Department
of Inorganic Chemistry, University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic
| | - Martin Pumera
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Science, Nanyang Technological University, 637371 Singapore
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Sun XZ, Liao Y, Li W, Guo LM. Neuroprotective effects of ganoderma lucidum polysaccharides against oxidative stress-induced neuronal apoptosis. Neural Regen Res 2017; 12:953-958. [PMID: 28761429 PMCID: PMC5514871 DOI: 10.4103/1673-5374.208590] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Ganoderma lucidum polysaccharides have protective effects against apoptosis in neurons exposed to ischemia/reperfusion injury, but the mechanisms are unclear. The goal of this study was to investigate the underlying mechanisms of the effects of ganoderma lucidum polysaccharides against oxidative stress-induced neuronal apoptosis. Hydrogen peroxide (H2O2) was used to induce apoptosis in cultured cerebellar granule cells. In these cells, ganoderma lucidum polysaccharides remarkably suppressed H2O2-induced apoptosis, decreased expression of caspase-3, Bax and Bim and increased that of Bcl-2. These findings suggested that ganoderma lucidum polysaccharides regulate expression of apoptosis-associated proteins, inhibit oxidative stress-induced neuronal apoptosis and, therefore, have significant neuroprotective effects.
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Affiliation(s)
- Xin-Zhi Sun
- Department of Orthopedics, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Ying Liao
- Department of Public Security Technology, Railway Police College, Zhengzhou, Henan Province, China.,Department of Pathology, Peking University Health Science Center, Beijing, China
| | - Wei Li
- Department of Public Security Technology, Railway Police College, Zhengzhou, Henan Province, China
| | - Li-Mei Guo
- Department of Pathology, Peking University Health Science Center, Beijing, China
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Rivabene R, Napolitano M, Cantafora A, Bravo E. Redox-Dependent Modulation of Lipid Synthesis Induced by Oleic Acid in the Human Intestinal Epithelial Cell Line Caco-2. Exp Biol Med (Maywood) 2016; 226:191-8. [PMID: 11361037 DOI: 10.1177/153537020122600306] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The absorption, remodeling, and delivery of dietary lipids by intestinal cells are part of a complex multi-step process, the dynamics of which is influenced by the lipid composition of the diet and the physiological state of enterocytes. Emerging data indicate that, among the parameters known to modulate the cell functionality, the internal oxidative balance plays a pivotal role. In this study, we analyzed the effects of varying redox equilibria on the way in which the intestinal Caco-2 cell line utilize an otogenous lipid source such as oleic acid. Firstly, we manipulated the intracellular levels of soluble thiols (glutathione), and the amount of cell-associated products of lipid peroxidation, commonly regarded as two critical parameters characterizing the redox profile of the cells. Two different perturbants having opposite effects on the cell's redox profile were used: the pro-oxidizing agent CuSO4 (2.5 and 10 µM) and the antioxidant and thiol supplier N-acetylcysteine (NAC, 2.5 and 5 mM). The influence of these mild but critical manipulations on the incorporation of oleate (50 and 500 µM) into cholesterol, triacylglycerol, end phospholipid was then evaluated. We found that the emerging pro-oxidant condition induced by CuSO4 pre-exposure was associated with a significant up-regulation of phospholipid synthesis, while minor modifications were detected in that of triacylgiycerols. Conversely, when a more reducing state was induced by NAC pre-treatment, there was a significant down-regulation of triacylglycerol synthesis, with minor modifications in that of phospholipids. In addition, the incorporation of oleic acid in the cholesteryl ester fraction appeared to be unmodified under all the redox conditions reported. On the whole, these results indicate that the pre-existing internal redox potential of the enterocytes is a critical factor that is able to differentially modulate lipid synthesis at the Intestinal level. Thus, the adoption of a strategy designed to control/buffer the antioxidant capacity of the gastrointestinal tract could have important consequences for the modulation of lipid balance in the body.
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Affiliation(s)
- R Rivabene
- Laboratory of Metabolism and Pathological Biochemistry, Istituto Superiore di Sanità, Rome, Italy.
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Spohn SN, Bianco F, Scott RB, Keenan CM, Linton AA, O’Neill CH, Bonora E, Dicay M, Lavoie B, Wilcox RL, MacNaughton WK, De Giorgio R, Sharkey KA, Mawe GM. Protective Actions of Epithelial 5-Hydroxytryptamine 4 Receptors in Normal and Inflamed Colon. Gastroenterology 2016; 151:933-944.e3. [PMID: 27480173 PMCID: PMC5159265 DOI: 10.1053/j.gastro.2016.07.032] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 06/16/2016] [Accepted: 07/06/2016] [Indexed: 12/12/2022]
Abstract
BACKGROUND & AIMS The 5-hydroxytryptamine receptor 4 (5-HT4R or HTR4) is expressed in the colonic epithelium but little is known about its functions there. We examined whether activation of colonic epithelial 5-HT4R protects colons of mice from inflammation. METHODS The 5-HT4R agonist tegaserod (1 mg/kg), the 5-HT4R antagonist GR113808 (1 mg/kg), or vehicle (control) were delivered by enema to wild-type or 5-HT4R knockout mice at the onset of, or during, active colitis, induced by administration of dextran sodium sulfate or trinitrobenzene sulfonic acid. Inflammation was measured using the colitis disease activity index and by histologic analysis of intestinal tissues. Epithelial proliferation, wound healing, and resistance to oxidative stress-induced apoptosis were assessed, as was colonic motility. RESULTS Rectal administration of tegaserod reduced the severity of colitis compared with mice given vehicle, and accelerated recovery from active colitis. Rectal tegaserod did not improve colitis in 5-HT4R knockout mice, and intraperitoneally administered tegaserod did not protect wild-type mice from colitis. Tegaserod increased proliferation of crypt epithelial cells. Stimulation of 5-HT4R increased Caco-2 cell migration and reduced oxidative stress-induced apoptosis; these actions were blocked by co-administration of the 5-HT4R antagonist GR113808. In noninflamed colons of wild-type mice not receiving tegaserod, inhibition of 5-HT4Rs resulted in signs of colitis within 3 days. In these mice, epithelial proliferation decreased and bacterial translocation to the liver and spleen was detected. Daily administration of tegaserod increased motility in inflamed colons of guinea pigs and mice, whereas administration of GR113808 disrupted motility in animals without colitis. CONCLUSIONS 5-HT4R activation maintains motility in healthy colons of mice and guinea pigs, and reduces inflammation in colons of mice with colitis. Agonists might be developed as treatments for patients with inflammatory bowel diseases.
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Affiliation(s)
| | - Francesca Bianco
- Department of Veterinary Medical Sciences,Department of Medical and Surgical Sciences, University of Bologna, Italy
| | | | - Catherine M. Keenan
- Hotchkiss Brain Institute, Department of Physiology and Pharmacology, University of Calgary, Calgary, AB, Canada,Snyder Institute for Chronic Diseases, Department of Physiology and Pharmacology, University of Calgary, Calgary, AB, Canada
| | | | | | - Elena Bonora
- Department of Medical and Surgical Sciences, University of Bologna, Italy
| | - Michael Dicay
- Hotchkiss Brain Institute, Department of Physiology and Pharmacology, University of Calgary, Calgary, AB, Canada
| | - Brigitte Lavoie
- Neurological Sciences, University of Vermont, Burlington, VT
| | | | - Wallace K. MacNaughton
- Hotchkiss Brain Institute, Department of Physiology and Pharmacology, University of Calgary, Calgary, AB, Canada
| | - Roberto De Giorgio
- Department of Medical and Surgical Sciences, University of Bologna, Italy
| | - Keith A. Sharkey
- Hotchkiss Brain Institute, Department of Physiology and Pharmacology, University of Calgary, Calgary, AB, Canada,Snyder Institute for Chronic Diseases, Department of Physiology and Pharmacology, University of Calgary, Calgary, AB, Canada
| | - Gary M. Mawe
- Neurological Sciences, University of Vermont, Burlington, VT
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Sesamol induces mitochondrial apoptosis pathway in HCT116 human colon cancer cells via pro-oxidant effect. Life Sci 2016; 158:46-56. [DOI: 10.1016/j.lfs.2016.06.017] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Revised: 06/06/2016] [Accepted: 06/16/2016] [Indexed: 01/08/2023]
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Bianco F, Bonora E, Natarajan D, Vargiolu M, Thapar N, Torresan F, Giancola F, Boschetti E, Volta U, Bazzoli F, Mazzoni M, Seri M, Clavenzani P, Stanghellini V, Sternini C, De Giorgio R. Prucalopride exerts neuroprotection in human enteric neurons. Am J Physiol Gastrointest Liver Physiol 2016; 310:G768-75. [PMID: 26893157 PMCID: PMC5243219 DOI: 10.1152/ajpgi.00036.2016] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 02/12/2016] [Indexed: 01/31/2023]
Abstract
Serotonin (5-hydroxytryptamine, 5-HT) and its transporters and receptors are involved in a wide array of digestive functions. In particular, 5-HT4 receptors are known to mediate intestinal peristalsis and recent data in experimental animals have shown their role in neuronal maintenance and neurogenesis. This study has been designed to test whether prucalopride, a well-known full 5-HT4 agonist, exerts protective effects on neurons, including enteric neurons, exposed to oxidative stress challenge. Sulforhodamine B assay was used to determine the survival of SH-SY5Y cells, human enteric neurospheres, and ex vivo submucosal neurons following H2O2 exposure in the presence or absence of prucalopride (1 nM). Specificity of 5-HT4-mediated neuroprotection was established by experiments performed in the presence of GR113808, a 5-HT4 antagonist. Prucalopride exhibited a significant neuroprotective effect. SH-SY5Y cells pretreated with prucalopride were protected from the injury elicited by H2O2 as shown by increased survival (73.5 ± 0.1% of neuronal survival vs. 33.3 ± 0.1%, respectively; P < 0.0001) and a significant reduction of proapoptotic caspase-3 and caspase-9 activation in all neurons tested. The protective effect of prucalopride was reversed by the specific 5-HT4 antagonist GR113808. Prucalopride promotes a significant neuroprotection against oxidative-mediated proapoptotic mechanisms. Our data pave the way for novel therapeutic implications of full 5-HT4 agonists in gut dysmotility characterized by neuronal degeneration, which go beyond the well-known enterokinetic effect.
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Affiliation(s)
- Francesca Bianco
- Department of Veterinary Medical Sciences, University of Bologna, Italy; Department of Medical and Surgical Sciences, University of Bologna, Italy
| | - Elena Bonora
- Department of Medical and Surgical Sciences, University of Bologna, Italy
| | - Dipa Natarajan
- Paediatric Gastroenterology, UCL Institute of Child Health, London, UK
| | - Manuela Vargiolu
- BioNanoGenLab Health Sciences and Technologies-Interdepartmental Center for Industrial Research, University of Bologna, Italy
| | - Nikhil Thapar
- BioNanoGenLab Health Sciences and Technologies-Interdepartmental Center for Industrial Research, University of Bologna, Italy
| | - Francesco Torresan
- Department of Digestive System, St. Orsola-Malpighi Hospital, Bologna, Italy; and
| | - Fiorella Giancola
- Department of Veterinary Medical Sciences, University of Bologna, Italy; Department of Medical and Surgical Sciences, University of Bologna, Italy
| | - Elisa Boschetti
- Department of Medical and Surgical Sciences, University of Bologna, Italy
| | - Umberto Volta
- Department of Medical and Surgical Sciences, University of Bologna, Italy
| | - Franco Bazzoli
- Department of Medical and Surgical Sciences, University of Bologna, Italy
| | - Maurizio Mazzoni
- Department of Veterinary Medical Sciences, University of Bologna, Italy
| | - Marco Seri
- Department of Medical and Surgical Sciences, University of Bologna, Italy
| | - Paolo Clavenzani
- Department of Veterinary Medical Sciences, University of Bologna, Italy
| | | | - Catia Sternini
- Departments of Medicine and Neurobiology, David Geffen School of Medicine, UCLA, Los Angeles, California
| | - Roberto De Giorgio
- Department of Medical and Surgical Sciences, University of Bologna, Italy;
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Mukherjee N, Parida PK, Santra A, Ghosh T, Dutta A, Jana K, Misra AK, Sinha Babu SP. Oxidative stress plays major role in mediating apoptosis in filarial nematode Setaria cervi in the presence of trans-stilbene derivatives. Free Radic Biol Med 2016; 93:130-44. [PMID: 26849945 DOI: 10.1016/j.freeradbiomed.2016.01.027] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Revised: 01/15/2016] [Accepted: 01/29/2016] [Indexed: 12/14/2022]
Abstract
Lymphatic filariasis, affecting around 120 million people in 80 countries worldwide, is an extremely painful disease and caused permanent and long term disability. Owing to its alarming prevalence there is immediate need for development of new therapeutics. A series of trans-stilbene derivatives were synthesized using aqueous reaction condition showing potential as antifilarial agents demonstrated in vitro. MTT reduction assay and dye exclusion test were performed to evaluate the micro and macrofilaricidal potential of these compounds. Amid 20 trans-stilbene derivatives together with Resveratrol (RSV), a multifunctional natural product was screened; nine compounds (28, 29, 33, 35, 36, 38, 39, 41 and 42) have showed promising micro and macrofilaricidal activities and four of them (28, 39, 41 and 42) showed better effectiveness than RSV. In the treated parasites apoptosis was established by DNA laddering, in situ DNA fragmentation and FACS analysis. The generation of ROS in the treated parasites was indicated by the depletion in the level of GSH, GR and GST activity and elevation of SOD, catalase, GPx activity and superoxide anion and H2O2 level. Along with the ROS generation and oxidative stress, the decreased expression of anti-apoptotic ced-9 gene and increased expression of nematode specific pro-apoptotic genes, egl-1, ced-4 and ced-3 at the level of transcription and translation level; the up-regulation of caspase-3 activity and involvement of caspase-8,9,3, cytochrome-c and PARP were also observed and which denotes the probable existence of both extrinsic and intrinsic pathways apoptosis in parasitic nematodes. This observation is reported first time and thus it confirmed the mode of action and effectiveness of the compounds. Further, the comparative bioavailability-pharmacokinetics studies showed that compound 28 possesses comparable properties with Ivermectin. This study will certainly intensify our understanding of the pharmacological importance of trans-stilbenes as an anti-filarial agent.
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Affiliation(s)
- Niladri Mukherjee
- Parasitology Laboratory, Department of Zoology (Centre for Advanced Studies), Visva-Bharati University, Santiniketan 731 235, West Bengal, India
| | - Pravat Kumar Parida
- Bose Institute, Division of Molecular Medicine, P-1/12, C.I.T. Scheme VII M, Kolkata 700054, India
| | - Abhishek Santra
- Bose Institute, Division of Molecular Medicine, P-1/12, C.I.T. Scheme VII M, Kolkata 700054, India
| | - Tamashree Ghosh
- Bose Institute, Division of Molecular Medicine, P-1/12, C.I.T. Scheme VII M, Kolkata 700054, India
| | - Ananya Dutta
- Bose Institute, Division of Molecular Medicine, P-1/12, C.I.T. Scheme VII M, Kolkata 700054, India
| | - Kuladip Jana
- Bose Institute, Division of Molecular Medicine, P-1/12, C.I.T. Scheme VII M, Kolkata 700054, India.
| | - Anup Kumar Misra
- Bose Institute, Division of Molecular Medicine, P-1/12, C.I.T. Scheme VII M, Kolkata 700054, India.
| | - Santi P Sinha Babu
- Parasitology Laboratory, Department of Zoology (Centre for Advanced Studies), Visva-Bharati University, Santiniketan 731 235, West Bengal, India.
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Ren Z, Wang Y, Deng H, Deng Y, Deng J, Zuo Z, Wang Y, Peng X, Cui H, Shen L, Yu S, Cao S. Effects of deoxynivalenol on calcium homeostasis of concanavalin A—Stimulated splenic lymphocytes of chickens in vitro. ACTA ACUST UNITED AC 2016; 68:241-5. [DOI: 10.1016/j.etp.2016.01.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 12/12/2015] [Accepted: 01/07/2016] [Indexed: 12/28/2022]
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Hydrogen Peroxide and Sodium Transport in the Lung and Kidney. BIOMED RESEARCH INTERNATIONAL 2016; 2016:9512807. [PMID: 27073804 PMCID: PMC4814630 DOI: 10.1155/2016/9512807] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 03/04/2016] [Accepted: 03/08/2016] [Indexed: 02/07/2023]
Abstract
Renal and lung epithelial cells are exposed to some significant concentrations of H2O2. In urine it may reach 100 μM, while in the epithelial lining fluid in the lung it is estimated to be in micromolar to tens-micromolar range. Hydrogen peroxide has a stimulatory action on the epithelial sodium channel (ENaC) single-channel activity. It also increases stability of the channel at the membrane and slows down the transcription of the ENaC subunits. The expression and the activity of the channel may be inhibited in some other, likely higher, oxidative states of the cell. This review discusses the role and the origin of H2O2 in the lung and kidney. Concentration-dependent effects of hydrogen peroxide on ENaC and the mechanisms of its action have been summarized. This review also describes outlooks for future investigations linking oxidative stress, epithelial sodium transport, and lung and kidney function.
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Protective role against hydrogen peroxide and fibroblast stimulation via Ce-doped TiO2 nanostructured materials. Biochim Biophys Acta Gen Subj 2016; 1860:452-64. [DOI: 10.1016/j.bbagen.2015.12.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 11/19/2015] [Accepted: 12/01/2015] [Indexed: 11/20/2022]
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Dawson NJ, Storey KB. A hydrogen peroxide safety valve: The reversible phosphorylation of catalase from the freeze-tolerant North American wood frog, Rana sylvatica. Biochim Biophys Acta Gen Subj 2015; 1860:476-85. [PMID: 26691137 DOI: 10.1016/j.bbagen.2015.12.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 11/26/2015] [Accepted: 12/11/2015] [Indexed: 01/14/2023]
Abstract
BACKGROUND The North American wood frog, Rana sylvatica, endures whole body freezing while wintering on land and has developed multiple biochemical adaptations to elude cell/tissue damage and optimize its freeze tolerance. Blood flow is halted in the frozen state, imparting both ischemic and oxidative stress on cells. A potential build-up of H2O2 may occur due to increased superoxide dismutase activity previously discovered. The effect of freezing on catalase (CAT), which catalyzes the breakdown of H2O2 into molecular oxygen and water, was investigated as a result. METHODS The present study investigated the purification and kinetic profile of CAT in relation to the phosphorylation state of CAT from the skeletal muscle of control and frozen R. sylvatica. RESULTS Catalase from skeletal muscle of frozen wood frogs showed a significantly higher Vmax (1.48 fold) and significantly lower Km for H2O2 (0.64 fold) in comparison to CAT from control frogs (5°C acclimated). CAT from frozen frogs also showed higher overall phosphorylation (1.73 fold) and significantly higher levels of phosphoserine (1.60 fold) and phosphotyrosine (1.27 fold) compared to control animals. Phosphorylation via protein kinase A or the AMP-activated protein kinase significantly decreased the Km for H2O2 of CAT, whereas protein phosphatase 2B or 2C action significantly increased the Km. CONCLUSION The physiological consequence of freeze-induced CAT phosphorylation appears to improve CAT function to alleviate H2O2 build-up in freezing frogs. GENERAL SIGNIFICANCE Augmented CAT activity via reversible phosphorylation may increase the ability of R. sylvatica to overcome oxidative stress associated with ischemia.
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Affiliation(s)
- Neal J Dawson
- Department of Biology and Institute of Biochemistry, Carleton University, Ottawa, ON, Canada
| | - Kenneth B Storey
- Department of Biology and Institute of Biochemistry, Carleton University, Ottawa, ON, Canada.
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48
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Yoon C, Koppula S, Yoo S, Yum M, Kim J, Lee J, Song M. Rhus javanica Linn protects against hydrogen peroxide‑induced toxicity in human Chang liver cells via attenuation of oxidative stress and apoptosis signaling. Mol Med Rep 2015; 13:1019-25. [PMID: 26648020 DOI: 10.3892/mmr.2015.4603] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2015] [Accepted: 10/29/2015] [Indexed: 11/06/2022] Open
Abstract
Rhus javanica Linn, a traditional medicinal herb from the family Anacardiaceae, has been used in the treatment of liver diseases, cancer, parasitic infections, malaria and respiratory diseases in China, Korea and other Asian countries for centuries. In the present study, the protective effects of R. javanica ethanolic extract (RJE) on hydrogen peroxide (H2O2)-induced oxidative stress in human Chang liver cells was investigated. The cell cytotoxicity and viability were assessed using a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. The activities of superoxide dismutase (SOD) and catalase (CAT) were measured using respective enzymatic kits. Cell cycle analysis was performed using flow cytometric analysis. The protein expression levels of p53, B-cell lymphoma (Bcl)-2, Bcl-2-associated X protein (Bax) and caspase-3 were assessed by western blotting. Human Chang liver cells were treated with different concentrations (0.1, 0.3 or 0.5 mg/ml) of RJE, and were subsequently exposed to H2O2 (30 µM). Treatment with H2O2 (30 µM) significantly induced cytotoxicity (P<0.05) and reduced the viability of the Chang liver cells. However, pretreatment of the cells with RJE (0.1, 0.3 or 0.5 mg/ml) significantly increased the cell viability (P<0.001 at 0.5 mg/ml) in a concentration-dependent manner following H2O2 treatment. Furthermore, pretreatment with RJE increased the enzyme activities of SOD and CAT, and decreased the sub-G1 growth phase of the cell cycle in response to H2O2-induced oxidative stress (P<0.001 at 0.3 and 0.5 mg/ml H2O2). RJE also regulated the protein expression levels of p53, Bax, caspase-3 and Bcl-2. These results suggested that RJE may protect human Chang liver cells against oxidative damage by increasing the levels of antioxidant enzymes and regulating antiapoptotic oxidative stress mechanisms, thereby providing insights into the mechanism which underpins the traditional claims made for RJE in the treatment of liver diseases.
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Affiliation(s)
- Chanjin Yoon
- Department of Applied Life Science, Graduate School of Konkuk University, Chungju, Chungbuk 380‑701, Republic of Korea
| | - Sushruta Koppula
- Department of Biotechnology, College of Biomedical and Health Sciences, Konkuk University, Chungju, Chungbuk 380‑701, Republic of Korea
| | - Seunghoon Yoo
- Department of Applied Life Science, Graduate School of Konkuk University, Chungju, Chungbuk 380‑701, Republic of Korea
| | - Munjeong Yum
- Department of Applied Life Science, Graduate School of Konkuk University, Chungju, Chungbuk 380‑701, Republic of Korea
| | - Jinseoub Kim
- Department of Applied Life Science, Graduate School of Konkuk University, Chungju, Chungbuk 380‑701, Republic of Korea
| | - Jaedong Lee
- Department of Internal Medicine, School of Medicine, Konkuk University, Chungju, Chungbuk 380‑701, Republic of Korea
| | - Mindong Song
- Department of Biotechnology, College of Biomedical and Health Sciences, Konkuk University, Chungju, Chungbuk 380‑701, Republic of Korea
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Wang C, Gao X, Gao Y, Cao W, Tian J, Wu X, Ye Z, Zeng X, Zhou B, Wu J, Fang Z, Wan J, Qin J, Wen W. Controlled H 2O 2 release via long-lived electron-hole separation mediated to induce tumor cell apoptosis. J Mater Chem B 2015; 3:8115-8122. [PMID: 32262868 DOI: 10.1039/c5tb00186b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Flexible films of polytungstate (PT) as active ingredients were fabricated in PDMS as a "band-Aid" to achieve controllable H2O2 release. In these different systems of an amorphous PT building block, the lengthened lifetime (bleaching process) of photo-electron-hole separation is attributed to the electron trapping of the PT network and the existence of hole scavengers. The hole scavengers further prevent recombination of electrons and holes, so that the long-lived photoelectron could provide sustainable reactive oxygen species (ROS) by trapped electrons. Transient absorption illustrates the kinetic competition between the process of photohole induced bleaching and coloration induced by weak irradiation, which suggests that the hole scavenger is vital for ROS generation. The signals of electron spin resonance further confirm the existence of ROS. The profiles of controllable H2O2 with various release efficiency were obtained via fluorescence studies. The results indicate that the H2O2 release efficiency is related to both the hole scavenger and the tungstate cluster. The released H2O2 on the responses of tumor cells were evaluated. Compared with a cancer drug, the controllable and reversible released H2O2 delivery is highly efficient in preventing the proliferation and inducing apoptosis of A375 melanoma cells.
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Affiliation(s)
- Cong Wang
- Nano Science and Nano Technology Program and Department of Physics, The Hong Kong University of Science and Technology, Clear water bay, Kowloon, Hong Kong.
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Activation of surrogate death receptor signaling triggers peroxynitrite-dependent execution of cisplatin-resistant cancer cells. Cell Death Dis 2015; 6:e1926. [PMID: 26492363 PMCID: PMC4632318 DOI: 10.1038/cddis.2015.299] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 09/14/2015] [Accepted: 09/15/2015] [Indexed: 01/03/2023]
Abstract
Platinum-based drugs remain as the cornerstone of cancer chemotherapy; however, development of multidrug resistance presents a therapeutic challenge. This study aims at understanding the molecular mechanisms underlying resistance to cisplatin and unraveling surrogate signaling networks that could revert sensitivity to apoptosis stimuli. We made use of three different sets of cell lines, A549 and H2030 non-small-cell lung cancer (NSCLC) and A2780 ovarian cancer cells and their cisplatin-resistant variants. Here we report that cisplatin-resistant cell lines displayed a multidrug-resistant phenotype. Changes in mitochondrial metabolism and defective mitochondrial signaling were unraveled in the resistant cells. More interestingly, a marked increase in sensitivity of the resistant cells to death receptor-induced apoptosis, in particular TRAIL (TNF-related apoptosis-inducing ligand)-mediated execution, was observed. Although this was not associated with an increase in gene transcription, a significant increase in the localization of TRAIL death receptor, DR4, to the lipid raft subdomains of plasma membrane was detected in the resistant variants. Furthermore, exposure of cisplatin-resistant cells to TRAIL resulted in upregulation of inducible nitric oxide synthase (iNOS) and increase in nitric oxide (NO) production that triggered the generation of peroxynitrite (ONOO−). Scavenging ONOO− rescued cells from TRAIL-induced apoptosis, thereby suggesting a critical role of ONOO− in TRAIL-induced execution of cisplatin-resistant cells. Notably, preincubation of cells with TRAIL restored sensitivity of resistant cells to cisplatin. These data provide compelling evidence for employing strategies to trigger death receptor signaling as a second-line treatment for cisplatin-resistant cancers.
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