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Cu Zn superoxide dismutase

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https://www.readbyqxmd.com/read/28528861/mechanism-of-melatonin-protection-against-copper-ascorbate-induced-oxidative-damage-in-vitro-through-isothermal-titration-calorimetry
#1
Arnab K Ghosh, Shamreen Naaz, Bharati Bhattacharjee, Nirajan Ghosal, Aindrila Chattopadhyay, Souvik Roy, Russel J Reiter, Debasish Bandyopadhyay
AIMS: Involvement of oxidative stress in cardiovascular diseases is well established. Melatonin's role as an antioxidant and free radical scavenger via its receptor dependent and receptor independent pathways is well known. The aim of this study is to identify and elaborate upon a third mechanism by which melatonin is able to abrogate oxidative stress. MAIN METHODS: Oxidative stress was induced in vitro, by copper (0.2mM)-ascorbate (1mM) in isolated goat heart mitochondria, cytosol and peroxisomes and they were co-incubated with graded doses of melatonin...
May 18, 2017: Life Sciences
https://www.readbyqxmd.com/read/28500970/histopathological-changes-and-lipid-metabolism-in-the-liver-of-bufo-gargarizans-tadpoles-exposed-to-triclosan
#2
Lihong Chai, Aixia Chen, Pingping Luo, Hongfeng Zhao, Hongyuan Wang
In the current study, the adverse effects of TCS on liver health of B. gargarizans tadpoles were assessed. B. gargarizans larvae were exposed to TCS at 0, 10, 30, 60, and 150 μg L(-1) from Gosner stage 3 until metamorphic climax. The hepatosomatic index (HSI), hepatic histological and ultrastructural features, and transcript levels of genes associated with detoxification and oxidative stress as well as lipid metabolism in the livers were determined. Exposure to 150 μg L(-1) TCS resulted in increased HSI of tadpoles at metamorphic climax...
May 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/28490783/multiple-biomarker-responses-serum-biochemistry-oxidative-stress-genotoxicity-and-histopathology-in-channa-punctatus-exposed-to-heavy-metal-loaded-waste-water
#3
Mehjbeen Javed, Md Irshad Ahmad, Nazura Usmani, Masood Ahmad
Experiments were conducted to investigate the health of fish Channa punctatus inhabiting heavy metal-loaded waste water. Heavy metals in the order of Fe > Mn > Zn > Co > Ni > Cu = Cr were present in the waste water. Gills had high metal load followed by liver and then kidney. Albumin, albumin to globulin (A:G) ratio, triglyceride, high density lipoprotein (HDL) and very low density lipoprotein (VLDL) were found to be lower but phospholipid, low density lipoprotein (LDL), total protein, lipid and cholesterol were higher as compared to the reference...
May 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28487986/sumo-1-delays-neuronal-damage-in-the-spinal-cord-following-ischemia-reperfusion
#4
Hyo Young Jung, Dae Won Kim, Hyun Jung Kwon, Dae Young Yoo, In Koo Hwang, Moo-Ho Won, Tack-Geun Cho, Soo Young Choi, Seung Myung Moon
The present study investigated the protective effects of small ubiquitin-like modifier 1 (SUMO-1) on spinal cord ischemic damage in rabbits. A trans‑activator of transcription (Tat)‑SUMO‑1 fusion protein was prepared, and transient spinal cord ischemia was induced by occlusion of the abdominal aorta for 15 min. Vehicle (glycerol) or 1 mg/kg Tat-1-SUMO‑1 was administered intraperitoneally to the rabbits immediately following ischemia/reperfusion. Administration of Tat-SUMO-1 did not lead to significant alterations in arterial blood gases [partial pressure (Pa)CO2 and PaO2], pH, or blood glucose levels prior to ischemia, 10 min after occlusion or 10 min after reperfusion...
June 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28487719/silicon-mediated-alleviation-of-aluminum-toxicity-by-modulation-of-al-si-uptake-and-antioxidant-performance-in-ryegrass-plants
#5
Sofía Pontigo, Karina Godoy, Héctor Jiménez, Ana Gutiérrez-Moraga, María de la Luz Mora, Paula Cartes
Silicon (Si) has been well documented to alleviate aluminum (Al) toxicity in vascular plants. However, the mechanisms underlying these responses remain poorly understood. Here, we assessed the effect of Si on the modulation of Si/Al uptake and the antioxidant performance of ryegrass plants hydroponically cultivated with Al (0 and 0.2 mM) in combination with Si (0, 0.5, and 2.0 mM). Exposure to Al significantly increased Al concentration, mainly in the roots, with a consequent reduction in root growth. However, Si applied to the culture media steadily diminished the Al concentration in ryegrass, which was accompanied by an enhancement in root dry matter production...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28481134/the-role-of-oxidative-stress-in-the-clinical-manifestations-of-childhood-asthma
#6
Aleksandra Topic, Djordje Francuski, Aleksandra Nikolic, Katarina Milosevic, Snezana Jovicic, Bojan Markovic, Mirjana Djukic, Dragica Radojkovic
INTRODUCTION: The significance of oxidative stress in pathogenesis of childhood asthma was recognized, but its role in the clinical manifestations of disease is still unclear. MATERIALS AND METHODS: The study was conducted in 96 asthmatic children. The urinary biomarker of oxidative stress, 8-oxo-7,8-dihydro-2-deoxyguanosine (8-oxodG/creatinine) was determined by using HPLC-MS/MS. ELISA was performed to measure myeloperoxidase (MPO) and Cu,Zn- superoxide dismutase (Cu,Zn-SOD) in serum...
May 8, 2017: Fetal and Pediatric Pathology
https://www.readbyqxmd.com/read/28480639/pyrimethamine-significantly-lowers-csf-sod1-in-als-patients-with-sod1-mutations
#7
Dale J Lange, Mona Shahbazi, Vincenzo Silani, Albert C Ludolph, Jochen H Weishaupt, Senda Ajroud-Driss, Kara G Fields, Rahul Remanan, Stanley H Appel, Claudia Morelli, Alberto Doretti, Luca Maderna, Stefano Messina, Ulrike Weiland, Stefan L Marklund, Peter M Andersen
BACKGROUND: Cu/Zn superoxide dismutase (SOD1) reduction prolongs survival in SOD1-transgenic animal models. Pyrimethamine produces dose dependent SOD1 reduction in cell culture systems. A previous phase-1 trial showed pyrimethamine lowers SOD1 levels in leucocytes in patients with SOD1 mutations. This study investigated whether pyrimethamine lowered SOD1 levels in the cerebrospinal fluid (CSF) in patients carrying SOD1 mutations linked to ALS (fALS/SOD1). METHODS AND STUDY DESIGN: Multicenter (5 sites), open-label, 9-month duration, dose-ranging, to determine safety and efficacy of pyrimethamine to lower SOD1 levels in the CSF of FALS/SOD1...
May 8, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28476669/antioxidant-defenses-of-onychostoma-macrolepis-in-response-to-thermal-stress-insight-from-mrna-expression-and-activity-of-superoxide-dismutase-and-catalase
#8
Haibo Yu, Wei Deng, Dongdong Zhang, Yao Gao, Zhou Yang, Xiaochen Shi, Jian Sun, Jishu Zhou, Hong Ji
Onychostoma macrolepis has becoming an endangered fish species in China, which population gradually declined in the past few decades due to the changing environment including elevated water temperature resulted from adverse weather events. The present study determined antioxidant defenses of O. macrolepis in response to thermal stress, aiming to understand the role of antioxidant system in adaptation of thermal stress for O. macrolepis. Experimental fish which were acclimated at 24 °C were stressed at 30 °C for 0 h, 1 h, 3 h, 6 h, 12 h, 24 h and 48 h, respectively...
May 3, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28475686/quercitrin-and-quercetin-3-%C3%AE-d-glucoside-as-chemical-chaperones-for-the-a4v-sod1-als-causing-mutant
#9
Philbert Ip, Priya Roy Sharda, Anna Cunningham, Sumon Chakrabartty, Vijay Pande, Avijit Chakrabartty
In many cases of familial amyotrophic lateral sclerosis (ALS), mutant forms of the Cu,Zn superoxide dismutase protein (SOD1) misfold and aggregate in motor neurons. Monomers of the normally homodimeric SOD1 have been found in patient tissue, presymptomatic mouse models of ALS, and in vitro misfolding assays which suggests that monomerization might be an early step in the pathological SOD1 misfolding pathway. In this study, we targeted the dimer interface with small molecules that might act as chemical chaperones to stabilize the native dimer and prevent downstream misfolding and aggregation...
May 5, 2017: Protein Engineering, Design & Selection: PEDS
https://www.readbyqxmd.com/read/28472188/a-prion-like-mechanism-for-the-propagated-misfolding-of-sod1-from-in-silico-modeling-of-solvated-near-native-conformers
#10
Eamonn F Healy
A prion-like mechanism has been developed to explain the observed promotion of amyloid aggregation caused by conversion of structurally intact SOD1 to a misfolded form. Superoxide dismutase [Cu-Zn], or SOD1, is a homo-dimeric protein that functions as an antioxidant by scavenging for superoxide. The misfolding and aggregation of SOD1 is linked to inherited, or familial, amyotrophic lateral sclerosis (FALS), a progressive and fatal neurodegenerative disease. Aberrant SOD1 folding has also been strongly implicated in disease causation for sporadic ALS, or SALS, which accounts for ~90% of ALS cases...
2017: PloS One
https://www.readbyqxmd.com/read/28456064/effects-of-diclofenac-on-the-expression-of-nrf2-and-its-downstream-target-genes-in-mosquito-fish-gambusia-affinis
#11
Shuang Bao, Xiangping Nie, Ruikang Ou, Chao Wang, Peijia Ku, Kaibing Li
Diclofenac (DCF) is one of widely used non-steroidal anti-inflammatory drugs. Recently, this drug has been universally detected in aquatic environment. However, its potential adverse effects and oxidative stress toxic mechanisms on fish remain unclear. In the present study, we first cloned the crucial partial sequences of some key oxidative stress related genes, which include NF-E2-related factor 2 (Nrf2), NAD(P)H: quinoneoxidoreductase (NQO1), glutamate-cysteine ligase catalytic subunit (GCLC), Cu-Zn superoxide dismutase (SOD2), catalase (CAT), alpha-glutathione S-transferase (GSTA), and UDP-glucuronosyltransferases (UGT) in mosquito fish (Gambusia affinis)...
April 20, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28454052/a-multi-biomarker-approach-in-scallop-chlamys-farreri-to-assess-the-impact-of-contaminants-in-qingdao-coastal-area-of-china
#12
Ruiming Guo, Luqing Pan, Rongwang Ji
A multi-biomarker approach was carried out to classify the environmental quality and the adverse effects of contaminants on scallop Chlamys farreri. The scallops were collected from three sampling stations in Qingdao coastal area of China in March, May, August and October of 2015. A suite of environmental factors and biomarkers, including temperature, salinity, pH, the concentrations of polycyclic aromatic hydrocarbons (PAHs), tetrabromobisphenol A (TBBPA) and metals (Cr, Mn, Cu, Zn, Cd, Pb, As) in seawater and soft tissue, mRNA expression of aryl hydrocarbon receptor (AhR) and P-glycoprotein (P-gp), 7-ethoxyresorufin O-deethylase (EROD), glutathione-S-transferase (GST), uridine-diphosphate-glucuronyl-transferase (UGT), sulfotransferase (SULT), metallothionein (MT), Superoxide dismutase (SOD), glutathione peroxidase (GPx), catalase (CAT), lipid peroxidation (LPO) and protein carbonyl (PC) contents and DNA strand breaks, were measured in the gill and digestive gland...
August 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28445096/protection-from-oxidative-stress-in-immunocytes-of-the-colonial-ascidian-botryllus-schlosseri-transcript-characterization-and-expression-studies
#13
Nicola Franchi, Francesca Ballin, Loriano Ballarin
Botryllus schlosseri is a cosmopolitan colonial ascidian that undergoes cyclical generation changes, or take-overs, during which adult zooids are resorbed and replaced by their buds. At take-over, adult tissues undergo diffuse apoptosis and effete cells are massively ingested by circulating phagocytes, with a consequent increase in oxygen consumption and in production of reactive oxygen species (ROS). The latter are responsible for the death of phagocytes involved in the clearance of apoptotic cells and corpses by phagocytosis-induced apoptosis...
February 2017: Biological Bulletin
https://www.readbyqxmd.com/read/28443590/effects-of-apigenin-on-experimental-ischemia-reperfusion-injury-in-the-rat-ovary
#14
Zeynep Soyman, Sefa Kelekçi, Veysel Sal, Osman Şevket, Nihan Bayındır, Hafize Uzun
BACKGROUND: Apigenin, is a plant-derived compound belonging to flavone class, possess antioxidant, free radical scavenging and anti-inflammatory manners. AIMS: This paper aims to address effects of apigenin upon serum antimüllerian hormone (AMH) levels, tissue oxidative stress parameters and histopathological changes in ovarian ischemia/reperfusion (I/R) injury. STUDY DESIGN: Animal experiment. METHODS: Twenty eight female Wistar albino rats have been separated to four sections in a random way: Sham operation (Group 1), I/R plus saline (Group 2), I/R plus dimethyl sulfoxide (Group 3) and I/R plus apigenin (Group 4)...
April 13, 2017: Balkan Medical Journal
https://www.readbyqxmd.com/read/28442376/copper-sulfate-pretreatment-prevents-mitochondrial-electron-transport-chain-damage-and-apoptosis-against-mpp-induced-neurotoxicity
#15
Moisés Rubio-Osornio, Marisol Orozco-Ibarra, Araceli Díaz-Ruiz, Eduardo Brambila, Marie-Catherine Boll, Antonio Monroy-Noyola, Jorge Guevara, Sergio Montes, Camilo Ríos
Intrastriatal injection of 1-methyl-4-phenylpyridinium (MPP(+)) is considered a model to reproduce some biochemical alterations observed in Parkinson's disease (PD) patients. Among those alterations, inhibition of mitochondrial complex I activity, increased free radical production and reduced antioxidant responses have been reported. Copper (Cu) plays an important role in the metabolism and antioxidative responses through its participation as a cofactor in the cytochrome c oxidase enzyme (COX), Cu/Zn-superoxide dismutase (Cu/Zn-SOD), and metallothioneins...
April 22, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28416257/nrf2-and-regulation-of-the-antioxidant-system-in-the-antarctic-silverfish-pleuragramma-antarctica-adaptation-to-environmental-changes-of-pro-oxidant-pressure
#16
Maria Elisa Giuliani, Maura Benedetti, Marco Nigro, Francesco Regoli
Despite the key importance of Nrf2-Keap1 in regulating antioxidant system in vertebrates, this system is still poorly investigated in marine species. The present study focused on the Antarctic silverfish Pleuragramma antarctica which, during the final phases of embryo development in platelet ice, is challenged by a sudden enhancement of environmental oxidative conditions associated to ice melting. Partial coding sequences were identified for Nrf2, its repressor Keap1 and for typical Nrf2-target antioxidant genes, like catalase, glutathione peroxidase isoform 1 and Cu/Zn-dependent superoxide dismutase...
April 7, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28409332/a-new-mouse-model-of-frailty-the-cu-zn-superoxide-dismutase-knockout-mouse
#17
Sathyaseelan S Deepa, Shylesh Bhaskaran, Sara Espinoza, Susan V Brooks, Anne McArdle, Malcolm J Jackson, Holly Van Remmen, Arlan Richardson
Frailty is a geriatric syndrome that is an important public health problem for the older adults living in the USA. Although several methods have been developed to measure frailty in humans, we have very little understanding of its etiology. Because the molecular basis of frailty is poorly understood, mouse models would be of great value in determining which pathways contribute to the development of frailty. More importantly, mouse models would be critical in testing potential therapies to treat and possibly prevent frailty...
April 2017: GeroScience
https://www.readbyqxmd.com/read/28407763/klotho-ameliorates-oxidized-low-density-lipoprotein-ox-ldl-induced-oxidative-stress-via-regulating-lox-1-and-pi3k-akt-enos-pathways
#18
Yansheng Yao, Yanbing Wang, Yibo Zhang, Chang Liu
BACKGROUND: Atherosclerosis is a common cardiovascular disease that causes myocardial infarction, heart failure, and stroke. Increased oxidized low density lipoprotein (ox-LDL) in the sub-endothelium is the characteristic origin of atherogenesis. Klotho, an anti-aging protein, has been reported to protect against atherosclerosis and ameliorate endothelial dysfunction in vivo. The aim of this study is to investigatethe anti-oxidative activity of Klothoin ox-LDL-treated human umbilical vein endothelial cells (HUVECs)...
April 13, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28400803/pretreated-quercetin-protects-gerbil-hippocampal-ca1-pyramidal-neurons-from-transient-cerebral-ischemic-injury-by-increasing-the-expression-of-antioxidant-enzymes
#19
Bai Hui Chen, Joon Ha Park, Ji Hyeon Ahn, Jeong Hwi Cho, In Hye Kim, Jae Chul Lee, Moo-Ho Won, Choong-Hyun Lee, In Koo Hwang, Jong-Dai Kim, Il Jun Kang, Jun Hwi Cho, Bich Na Shin, Yang Hee Kim, Yun Lyul Lee, Seung Min Park
Quercetin (QE; 3,5,7,3',4'-pentahydroxyflavone), a well-known flavonoid, has been shown to prevent against neurodegenerative disorders and ischemic insults. However, few studies are reported regarding the neuroprotective mechanisms of QE after ischemic insults. Therefore, in this study, we investigated the effects of QE on ischemic injury and the expression of antioxidant enzymes in the hippocampal CA1 region of gerbils subjected to 5 minutes of transient cerebral ischemia. QE was pre-treated once daily for 15 days before ischemia...
February 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/28391978/recombinant-protein-transduction-domain-cu-zn-superoxide-dismutase-alleviates-bone-cancer-pain-via-peroxiredoxin-4-modulation-and-antioxidation
#20
Wanjun Yao, Haiwen Zhao, Ruoshi Shi, Xiaohui Li, Yang Li, Changbin Ke, Juying Liu
Bone cancer pain (BCP) is a serious chronic clinical condition and reactive oxygen species (ROS) were considered to be involved in its development and persistency. Normally, superoxide dismutase (SOD) converts superoxide anions to hydrogen peroxide (H2O2) and H2O2 is then naturalized to be water by peroxiredoxin 4. We reported previously that recombinant protein transduction domain (PTD)-Cu/Zn SOD effectively scavenged excessive ROS and prevented cardiomyocytes from hypoxia-reoxygenation damage. However, whether PTD-Cu/Zn SOD would prevent BCP development is unknown...
May 13, 2017: Biochemical and Biophysical Research Communications
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