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N acetylcysteine

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https://www.readbyqxmd.com/read/29353375/comparative-effects-of-hydrogen-sulfide-releasing-compounds-on-3h-d-aspartate-release-from-bovine-isolated-retinae
#1
Pratik Bankhele, Ankita Salvi, Jamal Jamil, Fatou Njie-Mbye, Sunny Ohia, Catherine A Opere
We investigated the pharmacological actions of a slow-releasing H2S donor, GYY 4137; a substrate for the biosynthesis of H2S, L-cysteine and its precursor, N-acetylcysteine on potassium (K+; 50 mM)-evoked [3H]D-aspartate release from bovine isolated retinae using the Superfusion Method. GYY 4137 (10 nM-10 µM), L-cysteine (100 nM-10 µM) and N-acetylcysteine (10 µM-1 mM) elicited a concentration-dependent decrease in K+-evoked [3H]D-aspartate release from isolated bovine retinae without affecting basal tritium efflux...
January 20, 2018: Neurochemical Research
https://www.readbyqxmd.com/read/29351404/type-2-diabetes-impairs-the-ability-of-skeletal-muscle-pericytes-to-augment-postischemic-neovascularization-in-db-db-mice
#2
Katherine L Hayes, Louis M Messina, Lawrence M Schwartz, Jinglian Yan, Amy S Burnside, Sarah Witkowski
Peripheral artery disease is an atherosclerotic occlusive disease that causes limb ischemia and has few effective non-interventional treatments. Stem cell therapy is promising, but concomitant diabetes may limit its effectiveness. We evaluated the therapeutic potential of skeletal muscle pericytes to augment postischemic neovascularization in wild type and type 2 diabetic (T2DM) mice. Wild type C57BL/6J and leptin receptor spontaneous mutation db/db T2DM mice underwent unilateral femoral artery excision to induce limb ischemia...
January 10, 2018: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/29348410/oxidative-stress-via-inhibition-of-the-mitochondrial-electron-transport-and-nrf-2-mediated-anti-oxidative-response-regulate-the-cytotoxic-activity-of-plumbagin
#3
Arvinder Kapur, Thomas Beres, Kavya Rathi, Amruta P Nayak, Austin Czarnecki, Mildred Felder, Amani Gillette, Spencer S Ericksen, Emmanuel Sampene, Melissa C Skala, Lisa Barroilhet, Manish S Patankar
Plumbagin, an anti-cancer agent, is toxic to cells of multiple species. We investigated if plumbagin targets conserved biochemical processes. Plumbagin induced DNA damage and apoptosis in cells of diverse mutational background with comparable potency. A 3-5 fold increase in intracellular oxygen radicals occurred in response to plumbagin. Neutralization of the reactive oxygen species by N-acetylcysteine blocked apoptosis, indicating a central role for oxidative stress in plumbagin-mediated cell death. Plumbagin docks in the ubiquinone binding sites (Q0 and Qi) of mitochondrial complexes I-III, the major sites for oxygen radicals...
January 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29348177/dasatinib-increases-endothelial-permeability-leading-to-pleural-effusion
#4
Carole Phan, Etienne-Marie Jutant, Ly Tu, Raphaël Thuillet, Andrei Seferian, David Montani, Alice Huertas, Jan van Bezu, Fabian Breijer, Anton Vonk Noordegraaf, Marc Humbert, Jurjan Aman, Christophe Guignabert
Pleural effusion is a frequent side-effect of dasatinib, a second-generation tyrosine kinase inhibitor used in the treatment of chronic myelogenous leukaemia. However, the underlying mechanisms remain unknown. We hypothesised that dasatinib alters endothelial integrity, resulting in increased pulmonary vascular endothelial permeability and pleural effusion.To test this, we established the first animal model of dasatinib-related pleural effusion, by treating rats with a daily regimen of high doses of dasatinib (10 mg·kg-1·day-1 for 8 weeks)...
January 2018: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/29348106/report-palladium-glutathione-n-acetylcysteine-d-penicillamine-conjugation-chemistry
#5
Muhammad Mukhtiar, Syed Umer Jan, Muhammad Farid Khan, Naseem Ullah, Abid Hussain, Saifur Rehman, Muhammad Murtaza Qureshi
The metalloelement Palladium has a number of potential Pharmaco-clinical advantages. Palladium compounds have antiviral, antibacterial, neuroprotective and antitumor properties. However studies have also indicated some mild to serious toxic effects of Palladium metalloelements. Biothiols are important antioxidants that provide protection against metals toxicity. The interaction of metalloelements with biothiols can provide valuable information about the level of toxicity of the metalloelements and about the protective role of biothiols thereof...
January 2018: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29341528/-n-acetylcysteine%C3%A2-effective-treatment-in-severe-alcoholic-hepatitis%C3%A2
#6
Isaline Verdon, Laurent Spahr, Jacques Serratrice
The use of N-acetylcysteine is of unknown significance when it comes to acute liver failure of other origin but for paracetamol overdose. Current data state its beneficial use when added to standard treatment for acute alcoholic hepatitis, whereas this attitude is less clear for hepatitis of variable other origin. This review of literature attends to evaluate and reveal the possible interest of adding N-acetylcysteine to standard care of acute liver failure due to alcoholism or other non-paracetamol linked causes...
January 17, 2018: Revue Médicale Suisse
https://www.readbyqxmd.com/read/29335879/current-approaches-and-new-developments-in-the-pharmacological-management-of-tourette-syndrome
#7
REVIEW
Julio Quezada, Keith A Coffman
Tourette syndrome (TS) is a neurodevelopmental disorder of unknown etiology characterized by spontaneous, involuntary movements and vocalizations called tics. Once thought to be rare, TS affects 0.3-1% of the population. Tics can cause physical discomfort, emotional distress, social difficulties, and can interfere with education and desired activities. The pharmacologic treatment of TS is particularly challenging, as currently the genetics, neurophysiology, and neuropathology of this disorder are still largely unknown...
January 15, 2018: CNS Drugs
https://www.readbyqxmd.com/read/29327458/lead-induced-dna-damage-and-cell-apoptosis-in-human-renal-proximal-tubular-epithelial-cell-attenuation-via-n-acetyl-cysteine-and-tannic-acid
#8
Manushi Siddarth, Diwesh Chawla, Alpana Raizada, Neelam Wadhwa, Basu D Banerjee, Meera Sikka
This study investigates the exposure of lead-induced reactive oxygen species (ROS) generation, DNA damage, and apoptosis and also evaluates the therapeutic intervention using antioxidants in human renal proximal tubular cells (HK-2 cells). Following treatment of HK-2 cells with an increasing concentration of lead nitrate (0-50 μM) for 24 h, the intracellular ROS level increased whereas the GSH level decreased significantly in a dose-dependent manner. Comet assay results revealed that lead nitrate showed the ability to increase the levels of DNA strand breaks in HK-2 cells...
January 12, 2018: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29325970/the-role-of-adjuvant-immunomodulatory-agents-for-treatment-of-severe-influenza
#9
REVIEW
David S Hui, Nelson Lee, Paul K Chan, John H Beigel
A severe inflammatory immune response with hypercytokinemia occurs in patients hospitalized with severe influenza, such as avian influenza A(H5N1), A(H7N9), and seasonal A(H1N1)pdm09 virus infections. The role of immunomodulatory therapy is unclear as there have been limited published data based on randomized controlled trials (RCTs). Passive immunotherapy such as convalescent plasma and hyperimmune globulin have some studies demonstrating benefit when administered as an adjunctive therapy for severe influenza...
January 8, 2018: Antiviral Research
https://www.readbyqxmd.com/read/29324774/activated-carbon-n-acetylcysteine-microcapsule-protects-against-nonalcoholic-fatty-liver-disease-in-young-rats-via-activating-telomerase-and-inhibiting-apoptosis
#10
Tingting Shi, Xingxin Yang, Hongping Zhou, Jianjun Xi, Jingjing Sun, Yunling Ke, Jiankang Zhang, Yidan Shao, Xiaojie Jiang, Xuwang Pan, Shourong Liu, Rangxiao Zhuang
Non-alcoholic fatty liver disease (NAFLD) is becoming one of the world's most common chronic liver diseases in childhood, yet no therapy is available that has been approved by the food and drug administration (FDA). Previous studies have reported that telomere and telomerase are involved the development and progression of NAFLD. This study was designed to investigate the potential beneficial effects of activated carbon N-acetylcysteine (ACNAC) microcapsules on the development of NAFLD in young rats as well as the underlying mechanism(s) involved...
2018: PloS One
https://www.readbyqxmd.com/read/29324388/toxicity-of-surface-modified-copper-oxide-nanoparticles-in-a-mouse-macrophage-cell-line-interplay-of-particles-surface-coating-and-particle-dissolution
#11
Helena Líbalová, Pedro M Costa, Magnus Olsson, Lucian Farcal, Simona Ortelli, Magda Blosi, Jan Topinka, Anna L Costa, Bengt Fadeel
The rapid dissolution of copper oxide (CuO) nanoparticles (NPs) with release of ions is thought to be one of the main factors modulating their toxicity. Here we assessed the cytotoxicity of a panel of CuO NPs (12 nm ± 4 nm) with different surface modifications, i.e., anionic sodium citrate (CIT) and sodium ascorbate (ASC), neutral polyvinylpyrrolidone (PVP), and cationic polyethylenimine (PEI), versus the pristine (uncoated) NPs, using a murine macrophage cell line (RAW264.7). Cytotoxicity, reactive oxygen species (ROS) production, and cellular uptake were assessed...
December 29, 2017: Chemosphere
https://www.readbyqxmd.com/read/29322434/protection-from-reperfusion-injury-with-intracoronary-n-acetylcysteine-in-patients-with-stemi-undergoing-primary-percutaneous-coronary-intervention-in-a-cardiac-tertiary-center
#12
Younes Nozari, Azadeh Eshraghi, Azita Hajhossein Talasaz, Mostafa Bahremand, Jamshid Salamzadeh, Mojtaba Salarifar, Hamidreza Pourhosseini, Arash Jalali, Seyedeh Hamideh Mortazavi
BACKGROUND: Evidence suggests that oxidative stress plays a principal role in myocardial damage following ischemia/reperfusion events. Recent studies have shown that the antioxidant properties of N-acetylcysteine (NAC) may have cardioprotective effects in high doses, but-to the best of our knowledge-few studies have assessed this. OBJECTIVES: Our objective was to investigate the impact of high-dose NAC on ischemia/reperfusion injury. METHODS: We conducted a randomized double-blind placebo-controlled trial in which 100 consecutive patients with ST-elevation myocardial infarction undergoing percutaneous coronary intervention (PCI) were randomly assigned to the case group (high-dose NAC 100 mg/kg bolus followed by intracoronary NAC 480 mg during PCI then intravenous NAC 10 mg/kg for 12 h) or the control group (5% dextrose)...
January 10, 2018: American Journal of Cardiovascular Drugs: Drugs, Devices, and Other Interventions
https://www.readbyqxmd.com/read/29317200/hyperuricemia-enhances-intracellular-urate-accumulation-via-down-regulation-of-cell-surface-bcrp-abcg2-expression-in-vascular-endothelial-cells
#13
Hisakazu Komori, Kazuyuki Yamada, Ikumi Tamai
Hyperuricemia has been recognized as an independent risk factor for cardiovascular disease. Urate stimulates NADPH oxidase and induces production of reactive oxygen species (ROS); consequently, intracellular urate accumulation can induce oxidative stress leading to endothelial dysfunction. Here, we studied the mechanism involved, using human umbilical vascular endothelial cells (HUVEC) as a model. Pretreatment with 15mg/dL unlabeled uric acid (corresponding to hyperuricemia) resulted in increased uptake of [14C]uric acid at steady-state by HUVEC, whereas pretreatment with 5mg/dL uric acid (in the normal serum concentration range) did not...
January 6, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29315209/the-bioactive-extract-of-pinnigorgia-sp-induces-apoptosis-of-hepatic-stellate-cells-via-ros-erk-jnk-caspase-3-signaling
#14
Liang-Mou Kuo, Po-Jen Chen, Ping-Jyun Sung, Yu-Chia Chang, Chun-Ting Ho, Yi-Hsiu Wu, Tsong-Long Hwang
The activation of hepatic stellate cells (HSCs) is a significant phenomenon during the pathogenesis of liver disorders, including liver cirrhosis and fibrosis. Here, we identified that the extract from a gorgonian coral Pinnigorgia sp. (Pin) induced apoptosis of HSC-T6 cells. Pin inhibited the viability of HSC-T6 cells and increased their subG1 population, DNA fragmentation, caspase-3 activation, and reactive oxygen species (ROS) production in a concentration-dependent manner. The Pin-induced ROS generation and apoptotic effects were significantly reversed by a thiol antioxidant, N-acetylcysteine (NAC)...
January 9, 2018: Marine Drugs
https://www.readbyqxmd.com/read/29313384/chitosan-nanoparticles-triggered-the-induction-of-ros-mediated-cytoprotective-autophagy-in-cancer-cells
#15
Hao Wang, Xiwei Yu, Chang Su, Yijie Shi, Liang Zhao
There is a close relationship between autophagy and apoptosis during cancer cell death. We used chitosan nanoparticles (CS NPs) to explore the effects of internalized NPs on the induction of autophagy and to confirm the role of autophagic responses elicited by nanomaterials on the tumour cell's fate. CS NPs at nontoxic concentrations ranging from 10-100 μg/mL triggered the induction of autophagy. With the addition of CS NPs, the aggregation of endogenous LC3 was significantly enhanced and acidic autophagic bodies had been accumulated...
January 9, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29313067/combinatorial-effects-of-histone-deacetylase-inhibitors-hdaci-vorinostat-and-entinostat-and-adaphostin-are-characterized-by-distinct-redox-alterations
#16
Nilsa Rivera-Del Valle, Tiewei Cheng, Mary E Irwin, Hayley Donnella, Melissa M Singh, Joya Chandra
PURPOSE: Amongst the epigenetically targeted therapies, targeting of the histone deacetylases (HDACs) has yielded numerous drugs for clinical use in hematological malignancies, but none as yet for acute lymphocytic leukemia (ALL). Single agent activity of HDAC inhibitors (HDACi) has been elusive in ALL, and has prompted study of combinatorial strategies. Because several HDACi raise levels of intracellular oxidative stress, we evaluated combinations of two structurally distinct HDACi with the redox active compound adaphostin in ALL...
January 8, 2018: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/29311483/the-polysaccharide-extracted-from-umbilicaria-esculenta-inhibits-proliferation-of-melanoma-cells-through-ros-activated-mitochondrial-apoptosis-pathway
#17
Yanhong Sun, Jun Li, Yi Zhang, Yating Tu, Changzheng Huang, Juan Tao, Ming Yang, Liu Yang
Melanoma is one of the most aggressive skin cancers with an increasing rate of morbidity. Umbilicaria esculenta is an edible lichen and its main component of extracts-polysaccharide (PUE) has shown significant antitumor effects in a variety of cancer types such as stomach adenocarcinoma. However, whether it has an anti-melanoma effect and the underlying mechanism has not been revealed. In this article, we showed that PUE extracted from Umbilicaria esculenta could inhibit the growth of A875 and A375 melanoma cells but without obvious toxicity to normal vascular endothelial cells...
2018: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/29310566/analysis-of-oxidative-stress-related-markers-in-critically-ill-polytrauma-patients-an-observational-prospective-single-center-study
#18
Mihai Sandesc, Alexandru Florin Rogobete, Ovidiu Horea Bedreag, Anca Dinu, Marius Papurica, Carmen Alina Cradigati, Mirela Sarandan, Sonia Elena Popovici, Lavinia Melania Bratu, Tiberiu Bratu, Adrian Tudor Stan, Dorel Sandesc
Critically ill polytrauma patients have increased production of free radicals (FRs) and consequent alterations in biochemical pathways, as well as disruption of cellular integrity, due to increased lipid peroxidation. The aim of this study was to investigate several biomarkers associated with increased oxidative stress in critically ill polytrauma patients, and to evaluate the effect of antioxidant treatment on the clinical outcome in these patients. A total of 67 polytrauma patients from an intensive care unit met the selection criteria...
January 9, 2018: Bosnian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/29307443/low-intensity-ultrasound-reduces-high-glucose-induced-nitric-oxide-generation-in-retinal-pigment-epithelial-cells
#19
Mrigendra Bir Karmacharya, Binika Hada, So Ra Park, Byung Hyune Choi
Diabetic retinopathy (DR) is a severe micro-vascular complication of diabetes. High glucose (HG)-evoked nitric oxide (NO) production mediated by increased oxidative stress is a key factor in DR pathogenesis. In this study, we examined whether low-intensity ultrasound (LIUS) stimulation can reduce HG-induced NO generation. We determined that LIUS stimulation decreased the HG-induced NO generation possibly via inhibition of reactive oxygen species (ROS) and subsequently diminished the associated pro-inflammatory pathway involving the induced expression of inducible nitric oxide synthase, cyclooxygenase-2 and vascular endothelial growth factor...
January 4, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29306589/oxidative-stress-dependent-mmp-13-activity-underlies-glucose-neurotoxicity
#20
Ashley L Waldron, Patricia A Schroder, Kelly L Bourgon, Jessie K Bolduc, James L Miller, Adriana D Pellegrini, Amanda L Dubois, Magdalena Blaszkiewicz, Kristy L Townsend, Sandra Rieger
BACKGROUND: A complication of diabetes is neuropathy, a condition of sensory axon degeneration that originates in the epidermis. The mechanisms remain unknown but reactive oxygen species (ROS) have been implicated in this condition. In this study, we assessed the role of ROS and a candidate downstream target, MMP-13 in glucose-induced sensory axon degeneration in zebrafish and mice. METHODS: The effects of glucose on metabolism and sensory axon degeneration were assessed using qPCR and live imaging...
December 6, 2017: Journal of Diabetes and its Complications
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