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Neurotoxic reactions

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https://www.readbyqxmd.com/read/28219821/neurotoxic-responses-in-brain-tissues-of-rainbow-trout-exposed-to-imidacloprid-pesticide-assessment-of-8-hydroxy-2-deoxyguanosine-activity-oxidative-stress-and-acetylcholinesterase-activity
#1
Ahmet Topal, Gonca Alak, Mustafa Ozkaraca, Aslı Cilingir Yeltekin, Selim Comaklı, Gurdal Acıl, Mine Kokturk, Muhammed Atamanalp
The extensive use of imidacloprid, a neonicotinoid insecticide, causes undesirable toxicity in non-targeted organisms including fish in aquatic environments. We investigated neurotoxic responses by observing 8-hydroxy-2-deoxyguanosine (8-OHdG) activity, oxidative stress and acetylcholinesterase (AChE) activity in rainbow trout brain tissue after 21 days of imidacloprid exposure at levels of (5 mg/L, 10 mg/L, 20 mg/L). The obtained results indicated that 8-OHdG activity did not change in fish exposed to 5 mg/L of imidacloprid, but 10 mg/L and 20 mg/L of imidacloprid significantly increased 8-OHdG activity compared to the control (p < 0...
February 11, 2017: Chemosphere
https://www.readbyqxmd.com/read/28210948/the-effect-of-iron-nanoparticles-on-performance-of-cognitive-tasks-in-rats
#2
Elena Sheida, Olga Sipailova, Sergei Miroshnikov, Elena Sizova, Svyatoslav Lebedev, Elena Rusakova, Svetlana Notova
To assess the influence of 62.5 ± 0.6 nm iron nanoparticles on the status of central nervous system, a study was conducted on Wistar rats, which were subjected to abdominal injection of the studied nanoparticles at doses of 2 and 14 mg/kg. Based on the analysis of the structural and functional status of the cerebral cortex of rats, behavioral reactions of animals, and the elemental composition of the cerebral cortex, we investigated the nanoparticles' neurotoxic effect, whose degree and nature varied depending on the dosage and the time elapsed after the injection...
February 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28203577/ertapenem-induced-encephalopathy-in-a-patient-with-normal-renal-function
#3
S Scott Sutton, Mark Jumper, Sean Cook, Babatunde Edun, Michael D Wyatt
Drug-induced neurotoxicity is a rare adverse reaction associated with ertapenem. Encephalopathy is a type of neurotoxicity that is defined as a diffuse disease of the brain that alters brain function or structure. We report a patient with normal renal function who developed ertapenem-induced encephalopathy manifesting as altered mental status, hallucinations, and dystonic symptoms. The patient's symptoms improved dramatically following ertapenem discontinuation, consistent with case reports describing ertapenem neurotoxicity in renal dysfunction...
January 2017: Journal of Investigative Medicine High Impact Case Reports
https://www.readbyqxmd.com/read/28202777/nodding-syndrome-may-be-an-autoimmune-reaction-to-the-parasitic-worm-onchocerca-volvulus
#4
Tory P Johnson, Richa Tyagi, Paul R Lee, Myoung-Hwa Lee, Kory R Johnson, Jeffrey Kowalak, Abdel Elkahloun, Marie Medynets, Alina Hategan, Joseph Kubofcik, James Sejvar, Jeffrey Ratto, Sudhir Bunga, Issa Makumbi, Jane R Aceng, Thomas B Nutman, Scott F Dowell, Avindra Nath
Nodding syndrome is an epileptic disorder of unknown etiology that occurs in children in East Africa. There is an epidemiological association with Onchocerca volvulus, the parasitic worm that causes onchocerciasis (river blindness), but there is limited evidence that the parasite itself is neuroinvasive. We hypothesized that nodding syndrome may be an autoimmune-mediated disease. Using protein chip methodology, we detected autoantibodies to leiomodin-1 more abundantly in patients with nodding syndrome compared to unaffected controls from the same village...
February 15, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28174041/occurrence-origin-and-toxicity-of-disinfection-byproducts-in-chlorinated-swimming-pools-an-overview
#5
REVIEW
Tarek Manasfi, Bruno Coulomb, Jean-Luc Boudenne
Disinfection treatments are critical to conserve the microbiological quality of swimming pool water and to prevent water-borne infections. The formation of disinfection byproducts (DBPs) in swimming pools is an undesirable consequence resulting from reactions of disinfectants (e.g. chlorine) with organic and inorganic matter present in pool water, mainly brought by bathers. A considerable body of occurrence studies has identified several classes of DBPs in swimming pools with more than 100 compounds detected, mainly in chlorinated freshwater pools...
January 30, 2017: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/28161077/m1-macrophages-are-predominantly-recruited-to-the-major-pelvic-ganglion-of-the-rat-following-cavernous-nerve-injury
#6
Hotaka Matsui, Nikolai A Sopko, Johanna L Hannan, Allison A Reinhardt, Max Kates, Takahiro Yoshida, Xiaopu Liu, Fabio Castiglione, Petter Hedlund, Emmanuel Weyne, Maarten Albersen, Trinity J Bivalacqua
INTRODUCTION: Neurogenic erectile dysfunction is a common sequela of radical prostatectomy. The etiology involves injury to the autonomic cavernous nerves, which arise from the major pelvic ganglion (MPG), and subsequent neuroinflammation, which leads to recruitment of macrophages to the injury site. Currently, two macrophage phenotypes are known: neurotoxic M1 macrophages and neuroprotective M2 macrophages. AIM: To examine whether bilateral cavernous nerve injury (BCNI) in a rat model of erectile dysfunction would increase recruitment of neurotoxic M1 macrophages to the MPG...
February 2017: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/28160021/are-multitasking-abilities-impaired-in-welders-exposed-to-manganese-translating-cognitive-neuroscience-to-neurotoxicology
#7
Christoph van Thriel, Clara Quetscher, Beate Pesch, Anne Lotz, Martin Lehnert, Swaantje Casjens, Tobias Weiss, Rainer Van Gelder, Katrin Plitzke, Thomas Brüning, Christian Beste
Manganese (Mn) is an essential trace element with well characterized neurotoxic effects in high concentrations. Neurochemically, the initial neurotoxic effect of Mn is the perturbation of striatal γ-aminobutyric acid levels. Specific tasks for the assessment of cognitive functions subserved by fronto-striatal loops are available as the stop-change task (SCT) assessing control of multi-component behavior and action cascading. In a cross-sectional study, fifty male welders and 28 age-matched controls completed the SCT during a whole day examination...
February 3, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28148272/dose-dependent-induction-of-astrocyte-activation-and-reactive-astrogliosis-in-mouse-brain-following-maternal-exposure-to-carbon-black-nanoparticle
#8
Atsuto Onoda, Ken Takeda, Masakazu Umezawa
BACKGROUND: Recent studies indicate that maternal exposure to ambient ultrafine particles and nanoparticles has adverse effects of on the central nervous system. Quantitative dose-response data is required to better understand the developmental neurotoxicity of nanoparticles. The present study investigated dose-dependent effects of maternal exposure to carbon black nanoparticle (CB-NP) on astrocyte in the brains of mouse offspring. METHODS: A CB-NP suspension (2...
2, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28146110/polyphenolic-extract-of-euphorbia-supina-attenuates-manganese-induced-neurotoxicity-by-enhancing-antioxidant-activity-through-regulation-of-er-stress-and-er-stress-mediated-apoptosis
#9
Entaz Bahar, Geum-Hwa Lee, Kashi Raj Bhattarai, Hwa-Young Lee, Min-Kyung Choi, Harun-Or Rashid, Ji-Ye Kim, Han-Jung Chae, Hyonok Yoon
Manganese (Mn) is an important trace element present in human body, which acts as an enzyme co-factor or activator in various metabolic reactions. While essential in trace amounts, excess levels of Mn in human brain can produce neurotoxicity, including idiopathic Parkinson's disease (PD)-like extrapyramidal manganism symptoms. This study aimed to investigate the protective role of polyphenolic extract of Euphorbia supina (PPEES) on Mn-induced neurotoxicity and the underlying mechanism in human neuroblastoma SKNMC cells and Sprague-Dawley (SD) male rat brain...
January 30, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28144849/biocompatible-bacterial-cellulose-membrane-in-dural-defect-repair-of-rat
#10
Frederico de Melo Tavares de Lima, Flávia Cristina Morone Pinto, Belmira Lara da Silveira Andrade-da-Costa, Jaiurte Gomes Martins da Silva, Olávio Campos Júnior, José Lamartine de Andrade Aguiar
Duraplasty is necessary in nearly 30% of all neurological surgeries. Different tissues and materials have been evaluated in dura mater repair or as dural substitutes in neurosurgery. The aim was to evaluate the biocompatibility of the bacterial cellulose (BC) membranes, produced from sugarcane molasses, for dural defect repair in rats. Forty adults males Wistar rats divided into two groups: a control (ePTFE) and an experimental (BC). Bilateral frontoparietal craniectomy was performed, and a dural defect was created...
March 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28138054/bites-by-the-monocled-cobra-naja-kaouthia-in-chittagong-division-bangladesh-epidemiology-clinical-features-of-envenoming-and-management-of-70-identified-cases
#11
M A Faiz, M F Ahsan, A Ghose, M R Rahman, R Amin, M Hossain, M N Tareq, M A Jalil, U Kuch, R D G Theakston, D A Warrell, J B Harris
We describe 70 cases of monocled cobra (Naja kaouthia) bite admitted to Chittagong Medical College Hospital, Bangladesh. The biting snakes were identified by examining the dead snake and/or detecting N. kaouthia venom antigens in patients' serum. Bites were most common in the early morning and evening during the monsoon (May-July). Ligatures were routinely applied to the bitten limb before admission. Thirty-seven patients consulted traditional healers, most of whom made incisions around the bite site. Fifty-eight patients experienced severe neurotoxicity and most suffered swelling and pain of the bitten limb...
January 30, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28137605/protection-against-neo-formed-contaminants-nfcs-induced-toxicity-by-phytochemicals
#12
Mengyao Zhao, Pengpu Wang, Daotong Li, Jin Shang, Xiaosong Hu, Fang Chen
Neo-formed compounds (NFCs) are commonly found in all kinds of foods due to the complex reaction between components during processing. Acrylamide, benzo(a)pyrene and heterocyclic aromatic amines are the main types of NFCs in foods enriched with carbohydrate, fats and proteins, respectively. They have exhibited diverse toxicity, such as neurotoxicity, genotoxicity, potentially carcinogenic and reproductive toxicity. In recent years, various phytochemicals have been found to be effective in alleviation of their related toxicities both in vitro and in vivo...
January 28, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28117398/tryptophan-2-3-dioxygenase-tdo-deficiency-is-associated-with-subclinical-neuroprotection-in-a-mouse-model-of-multiple-sclerosis
#13
Tobias V Lanz, Sarah K Williams, Aleksandar Stojic, Simeon Iwantscheff, Jana K Sonner, Carl Grabitz, Simon Becker, Laura-Inés Böhler, Soumya R Mohapatra, Felix Sahm, Günter Küblbeck, Toshikazu Nakamura, Hiroshi Funakoshi, Christiane A Opitz, Wolfgang Wick, Ricarda Diem, Michael Platten
The catabolism of tryptophan to immunosuppressive and neuroactive kynurenines is a key metabolic pathway regulating immune responses and neurotoxicity. The rate-limiting step is controlled by indoleamine-2,3-dioxygenase (IDO) and tryptophan-2,3-dioxygenase (TDO). IDO is expressed in antigen presenting cells during immune reactions, hepatic TDO regulates blood homeostasis of tryptophan and neuronal TDO influences neurogenesis. While the role of IDO has been described in multiple immunological settings, little is known about TDO's effects on the immune system...
January 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28106547/phenotype-dependent-interactions-between-n-acetyl-l-aspartate-and-acetyl-coa-in-septal-sn56-cholinergic-cells-exposed-to-an-excess-of-zinc
#14
Marlena Zyśk, Hanna Bielarczyk, Sylwia Gul-Hinc, Aleksandra Dyś, Beata Gapys, Anna Ronowska, Monika Sakowicz-Burkiewicz, Andrzej Szutowicz
Pyruvate dehydrogenase reaction utilizing glucose-derived pyruvate is an almost exclusive source of acetyl-CoA in different cell mitochondrial compartments of the brain. In neuronal mitochondria, the largest fraction of acetyl-CoA is utilized for energy production and the much smaller one for N-acetyl-L-aspartate (NAA) synthesis. Cholinergic neurons, unlike others, require additional amounts of acetyl-CoA for acetylcholine synthesis. Therefore, several neurotoxic signals, which inhibit pyruvate dehydrogenase, generate deeper shortages of acetyl-CoA and greater mortality of cholinergic neurons than noncholinergic ones...
January 20, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28104350/neonatal-exposure-to-bde-209-impaired-learning-and-memory-decreased-expression-of-hippocampal-core-snares-and-synaptophysin-in-adult-rats
#15
Xiong Li, Chunmei Wang, Wen Wang, Chengwei Yue, Yan Tang
Polybrominated diphenyl ethers (PBDEs) are a class of flame retardants. While the mechanism remains unknown, the potential neurotoxic effects of PBDEs remain a relevant issue. In the present study, neonatal Sprague-Dawley rats of both sexes were administered BDE 209 (1, 10, or 20mg/kg body weight) or peanut oil once daily from postnatal day (PND) 5 to PND 10. We examined the spatial learning and memory by Morris water maze and the working and reference memory by eight-arm radial maze in the stage of adulthood...
January 16, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28090784/effect-of-resveratrol-and-tetracycline-on-the-subacute-paraquat-toxicity-in-mice
#16
R M Satpute, P P Pawar, S Puttewar, S D Sawale, P D Ambhore
Paraquat (PQ) is a nonselective bipyridyl herbicide widely used in agriculture to control weeds, but its accidental, occupational, or intentional exposure in humans is known to cause pneumo- and neurotoxicity which may proves fatal. Oxidative stress is reported as an underlined mechanism of PQ-induced toxicity in alveolar cells, neurons, and astroglia. PQ generates superoxides both through electron transport reaction (ETC) with nicotinamide adenine dinucleotide-dependent oxidoreductase and by the redox cycling via reaction with molecular oxygen...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28088107/gaas-laser-therapy-reestablishes-the-morphology-of-the-nmj-and-nachrs-after-injury-due-to-bupivacaine
#17
Cristiane Neves Alessi Pissulin, Paula Aiello Tomé de Souza Castro, Flávio Codina, Carina Guidi Pinto, Ivan Jose Vechetti-Junior, Selma Maria Michelin Matheus
BACKGROUND: Local anesthetics are used to relieve pre- and postoperative pain, acting on both sodium channels and nicotinic acetylcholine receptors (nAChR) at the neuromuscular junction (NMJ). Bupivacaine acts as a non-competitive antagonist and has limitations, such as myotoxicity, neurotoxicity, and inflammation. Low-level laser therapy (LLLT) has anti-inflammatory, regenerative, and analgesic effects. The aim of the present study was to evaluate the effects of a gallium arsenide laser (GaAs) on the morphology of the NMJ and nAChRs after application of bupivacaine in the sternomastoid muscle...
December 22, 2016: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28079261/effect-of-parthanatos-on-ropivacaine-induced-damage-in-sh-sy5y-cells
#18
Ting Zheng, Chun-Ying Zheng, Xiao-Chun Zheng, Ruo-Guang Zhao, Yan-Qing Chen
Ropivacaine is one of the most common but toxic local anesthetics, and the mechanisms underlying its neurotoxicity are still largely unknown. This study was conducted to prepare a ropivacaine-induced neuronal injury model and research the effects of ropivacaine on PARP-1 activation and NAD(+) depletion. The cell death and apoptosis of ropivacaine-induced SH-SY5Y cells were detected with flow cytometry. The lactate dehydrogenase cycling reaction measured the NAD(+) level, and Western blots were used to analyze the expression levels of PARP-1 and AIF after ropivacaine treatments with different concentrations and durations...
January 12, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28061549/fast-and-simple-detection-methods-for-the-4-base-pair-deletion-of-canine-mdr1-abcb1-gene-by-pcr-and-isothermal-amplification
#19
Cathrin P Stiedl, Karin Weber
Dogs with a 4-bp deletion in the MDR1 (or ABCB1) gene show intolerance to certain drugs routinely used in veterinary medicine, such as ivermectin, vincristine, and doxorubicin. The mutation leads to a dysfunctional P-glycoprotein drug transporter, which results in drug accumulation in the brain and severe neurotoxicity. A rapid and accurate in-house test to determine the genotype of patients in cases of acute neurotoxic signs or in tumor patients is desirable. We describe a cost-effective detection method with simple technical equipment for veterinary practice...
January 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28056603/epigallocatechin-3-gallate-attenuates-acrylamide-induced-apoptosis-and-astrogliosis-in-rat-cerebral-cortex
#20
Yin He, Dehong Tan, Bing Bai, Zhaoxia Wu, Shujuan Ji
The potent neurotoxic agent acrylamide (ACR) is formed during Maillard reaction in food processing. Epigallocatechin-3-gallate (EGCG), a major bioactive component of green tea, is an antioxidant, but its effects on ACR-induced neurotoxicity are unclear. Here, we investigated the neuroprotective effects of EGCG against ACR-induced apoptosis and astrogliosis in the cerebral cortex. Rats were pretreated with EGCG for 4 d and then co-administered ACR for 14 d. Immunohistochemical analysis of glial fibrillary acidic protein and 8-hydroxy-2'-deoxyguanosine indicated that EGCG attenuated astrogliosis and DNA damage in ACR treated rats...
January 5, 2017: Toxicology Mechanisms and Methods
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