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Neurotoxic reactions

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https://www.readbyqxmd.com/read/27915183/search-for-new-potential-anticonvulsants-with-anxiolytic-and-antidepressant-properties-among-derivatives-of-4-4-diphenylpyrrolidin-2-one
#1
Katarzyna Malawska, Aleksandra Rak, Beata Gryzło, Kinga Sałat, Małgorzata Michałowska, Elżbieta Żmudzka, Krzysztof Lodarski, Barbara Malawska, Katarzyna Kulig
BACKGROUND: The aim of this study was to synthesize a series of new N-Mannich bases derived from 4,4-diphenylpyrrolidin-2-one having differently substituted 4-phenylpiperazines as potential anticonvulsant agents with additional (beneficial) pharmacological properties. METHODS: The target compounds 8-12 were prepared in one step from the 4-substituted phenylpiperazines, paraformaldehyde, and synthesized 4,4-diphenylpyrrolodin-2-one (7) by a Mannich-type reaction...
September 22, 2016: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/27859025/modeling-drug-induced-neuropathy-using-human-ipscs-for-predictive-toxicology
#2
Ryo Ohara, Keiko Imamura, Fukiko Morii, Naohiro Egawa, Kayoko Tsukita, Takako Enami, Ran Shibukawa, Toshiki Mizuno, Masanori Nakagawa, Haruhisa Inoue
Drugs under development can cause unpredicted toxicity in humans due to differential drug responsiveness between humans and other disease models, resulting in clinical trial failures. Human induced pluripotent stem cells (iPSCs) are expected to represent a useful tool for toxicity testing. However, among many assays, appropriate cellular assays for predicting neurotoxicity in an iPSC-based model are still uncertain. Here, we generated neurons from iPSCs of Charcot-Marie-Tooth disease (CMT) patients, who are sensitive to anti-cancer drugs and present with the adverse reaction of neuropathy, and analyzed cellular phenotypes...
November 9, 2016: Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/27830532/role-of-microglia-in-neurological-disorders-and-their-potentials-as-a-therapeutic-target
#3
REVIEW
Li Du, Ying Zhang, Yang Chen, Jie Zhu, Yi Yang, Hong-Liang Zhang
Microglia are resident macrophage-like immune cells in the central nervous system (CNS) and play a vital role in both physiological and pathological conditions, including restoring the integrity of the CNS and promoting the progression of neurodegenerative disorders. Upon stimulation, microglia typically convert from a surveillant to an activated phenotype. The major function of microglia is to maintain homeostasis and normal function of the CNS, both during development and in response to CNS injury. Microglia regulate multiple aspects of inflammation, such as repair, cytotoxicity, regeneration, and immunosuppression due to their different kind of activation states or phenotypes...
November 9, 2016: Molecular Neurobiology
https://www.readbyqxmd.com/read/27821907/alteration-of-microrna-expressions-in-the-pons-and-medulla-in-rats-after-3-3-iminodipropionitrile-administration
#4
Keiko Ogata, Masahiko Kushida, Kaori Miyata, Kayo Sumida, Shuji Takeda, Takeshi Izawa, Mitsuru Kuwamura, Jyoji Yamate
Although 3,3'-iminodipropionitrile (IDPN) is widely used as a neurotoxicant to cause axonopathy due to accumulation of neurofilaments in several rodent models, its mechanism of neurotoxicity has not been fully understood. In particular, no information regarding microRNA (miRNA) alteration associated with IDPN is available. This study was conducted to reveal miRNA alteration related to IDPN-induced neurotoxicity. Rats were administered IDPN (20, 50, or 125 mg/kg/day) orally for 3, 7, and 14 days. Histopathological features were investigated using immunohistochemistry for neurofilaments and glial cells, and miRNA alterations were analyzed by microarray and reverse transcription polymerase chain reaction...
October 2016: Journal of Toxicologic Pathology
https://www.readbyqxmd.com/read/27816865/low-dose-thimerosal-in-pediatric-vaccines-adverse-effects-in-perspective
#5
REVIEW
José G Dórea
Vaccines are prophylactics used as the first line of intervention to prevent, control and eradicate infectious diseases. Young children (before the age of six months) are the demographic group most exposed to recommended/mandatory vaccines preserved with Thimerosal and its metabolite ethylmercury (EtHg). Particularly in the less-developed countries, newborns, neonates, and young children are exposed to EtHg because it is still in several of their pediatric vaccines and mothers are often immunized with Thimerosal-containing vaccines (TCVs) during pregnancy...
January 2017: Environmental Research
https://www.readbyqxmd.com/read/27780124/unveiling-the-neurotoxicity-of-methylmercury-in-fish-diplodus-sargus-through-a-regional-morphometric-analysis-of-brain-and-swimming-behavior-assessment
#6
Sónia Puga, Patrícia Pereira, Filipa Pinto-Ribeiro, Nelson J O'Driscoll, Erin Mann, Marisa Barata, Pedro Pousão-Ferreira, João Canário, Armando Almeida, Mário Pacheco
The current study aims to shed light on the neurotoxicity of MeHg in fish (white seabream - Diplodus sargus) by the combined assessment of: (i) MeHg toxicokinetics in the brain, (ii) brain morphometry (volume and number of neurons plus glial cells in specific brain regions) and (iii) fish swimming behavior (endpoints associated with the motor performance and the fear/anxiety-like status). Fish were surveyed for all the components after 7 (E7) and 14 (E14) days of dietary exposure to MeHg (8.7μgg(-1)), as well as after a post-exposure period of 28days (PE28)...
October 17, 2016: Aquatic Toxicology
https://www.readbyqxmd.com/read/27762105/clinical-profile-and-laboratory-parameters-in-1051-victims-of-snakebite-from-a-single-centre-in-kerala-south-india
#7
J C Menon, J K Joseph, M P Jose, B L Dhananjaya, O V Oommen
INTRODUCTION: Snakebite is an occupational hazard causing considerable morbidity and mortality worldwide, particularly so in tropical countries like India. OBJECTIVE: The aim of this study is to (i) review the demographic, clinical and laboratory findings in patients (1051) admitted with venomous snakebite (ii) to correlate mortality, morbidity and duration of hospital stay with clinical signs, symptoms and laboratory parameters. METHODS: A retrospective study of 1051 patients treated for snakebite over 10 years (2000 - 2009) in Little Flower Hospital, Angamaly, Kerala...
August 2016: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/27731942/noise-induced-dna-damage-within-the-auditory-nerve
#8
O'neil W Guthrie
An understanding of the molecular pathology that underlies noise induced neurotoxicity is a prerequisite to the design of targeted therapies. The objective of the current experiment was to determine whether or not DNA damage is part of the pathophysiologic sequela of noise induced neurotoxicity. The experiment consisted of 41 hooded Long-Evans rats (2 month old males) that were randomized into control and noise exposed groups. Both the control and the noise group followed the same time schedule and therefore started and ended the experiment together...
October 12, 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27693851/behavioral-facilitation-after-hippocampal-lesion-a-review
#9
REVIEW
R K W Schwarting, S Busse
When parts of the brain suffer from damage, certain functional deficits or impairments are the expected and typical outcome. A myriad of examples show such negative consequences, which afford the daily tasks of neurologists, neuropsychologists, and also behavioral neuroscientists working with experimental brain lesions. Compared to lesion-induced deficits, examples for functional enhancements or facilitation after brain lesions are rather rare and usually not well studied. Here, the mammalian hippocampus seems to provide an exception, since substantial evidence shows that its damage can have facilitatory behavioral effects under certain conditions...
September 28, 2016: Behavioural Brain Research
https://www.readbyqxmd.com/read/27651251/efficacy-of-natural-compounds-in-neurodegenerative-disorders
#10
Pranay Srivastava, Rajesh Singh Yadav
Neurodegenerative disorders represent clusters of serious diseases that results in progressive deterioration of normal structure and physiology of central nervous system. Pathophysiology of Alzheimer's, Parkinson's or other neurodegenerative disorders involves multifaceted permutation of genetic and environmental factors. Combinations of lifestyle modification linked with environmental factor jointly or alone represent the largest share of cases of these disorders. Etiology of such neuronal degeneration involves manifestation of toxic reaction in the form of functional anomalies leading to dysfunction of the ubiquitin-proteasome system, activated inflammatory cascade, compromised neuronal survival pathway, mitochondrial dysfunction and finally neuronal apoptosis/necrosis and cell death...
2016: Advances in Neurobiology
https://www.readbyqxmd.com/read/27627873/detoxification-of-vx-and-other-v-type-nerve-agents-in-water-at-37%C3%A2-%C3%A2-c-and-ph%C3%A2-7-4-by-substituted-sulfonatocalix-4-arenes
#11
Christian Schneider, Anne Bierwisch, Marianne Koller, Franz Worek, Stefan Kubik
Sulfonatocalix[4]arenes with an appended hydroxamic acid residue can detoxify VX and related V-type neurotoxic organophosphonates with half-lives down to 3 min in aqueous buffer at 37 °C and pH 7.4. The detoxification activity is attributed to the millimolar affinity of the calixarene moiety for the positively charged organophosphonates in combination with the correct arrangement of the hydroxamic acid group. The reaction involves phosphonylation of the hydroxamic acid followed by a Lossen rearrangement, thus rendering the mode of action stoichiometric rather than catalytic...
October 4, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27622829/emergency-use-of-uridine-triacetate-for-the-prevention-and-treatment-of-life-threatening-5-fluorouracil-and-capecitabine-toxicity
#12
Wen Wee Ma, Muhammad Wasif Saif, Bassel F El-Rayes, Marwan G Fakih, Thomas H Cartwright, James A Posey, Thomas R King, Reid W von Borstel, Michael K Bamat
BACKGROUND: Increased susceptibility to 5-fluorouracil (5-FU)/capecitabine can lead to rapidly occurring toxicity caused by impaired clearance, dihydropyrimidine dehydrogenase deficiency, and other genetic variations in the enzymes that metabolize 5-FU. Life-threatening 5-FU overdoses occur because of infusion pump errors, dosage miscalculations, and accidental or suicidal ingestion of capecitabine. Uridine triacetate (Vistogard) was approved in 2015 for adult and pediatric patients who exhibit early-onset severe or life-threatening 5-FU/capecitabine toxicities or present with an overdose...
September 13, 2016: Cancer
https://www.readbyqxmd.com/read/27610174/a-16-month-survey-of-cyclosporine-utilization-evaluation-in-allogeneic-hematopoietic-stem-cell-transplant-recipients
#13
Maria Tavakoli Ardakani, Ali Tafazoli, Mahshid Mehdizadeh, Abbas Hajifathali, Simin Dadashzadeh
OBJECTIVES: Graft versus host disease (GVHD) is a life threatening reaction in the stem cell transplantation process. Nowadays Cyclosporine is the most commonly utilized agent for GVHD prophylaxis and it has a major role in successful transplantation. Cyclosporine has been applied for many years in this field but it could be stated that currently no general consensus is available for its optimal method of administration. Conditions related to cyclosporine administration and possible related adverse reactions observed closely in our patients with the aim of constructing a comprehensive practice guideline in the future...
2016: Iranian Journal of Pharmaceutical Research: IJPR
https://www.readbyqxmd.com/read/27588052/altered-hippocampal-microrna-expression-profiles-in-neonatal-rats-caused-by-sevoflurane-anesthesia-microrna-profiling-and-bioinformatics-target-analysis
#14
Jishi Ye, Zongze Zhang, Yanlin Wang, Chang Chen, Xing Xu, Hui Yu, Mian Peng
Although accumulating evidence has suggested that microRNAs (miRNAs) have a serious impact on cognitive function and are associated with the etiology of several neuropsychiatric disorders, their expression in sevoflurane-induced neurotoxicity in the developing brain has not been characterized. In the present study, the miRNAs expression pattern in neonatal hippocampus samples (24 h after sevoflurane exposure) was investigated and 9 miRNAs were selected, which were associated with brain development and cognition in order to perform a bioinformatic analysis...
September 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/27588000/secular-slowing-of-auditory-simple-reaction-time-in-sweden-1959-1985
#15
Guy Madison, Michael A Woodley Of Menie, Justus Sänger
There are indications that simple reaction time might have slowed in Western populations, based on both cohort- and multi-study comparisons. A possible limitation of the latter method in particular is measurement error stemming from methods variance, which results from the fact that instruments and experimental conditions change over time and between studies. We therefore set out to measure the simple auditory reaction time (SRT) of 7,081 individuals (2,997 males and 4,084 females) born in Sweden 1959-1985 (subjects were aged between 27 and 54 years at time of measurement)...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27571870/dexmedetomidine-pretreatment-attenuates-propofol%C3%A2-induced-neurotoxicity-in-neuronal-cultures-from-the-rat-hippocampus
#16
Yi Wei, Junhua Hu, Yubing Liang, Yuling Zhong, Dan He, Yi Qin, Li Li, Jing Chen, Qiang Xiao, Yubo Xie
Propofol is widely used for the induction and maintenance of pediatric anesthesia. Previous studies have indicated that propofol can induce apoptosis, and damage cognitive and memory functions. Dexmedetomidine is a potent α‑2 adrenoceptor agonist with high selectivity. Previous observations have shown that dexmedetomidine exhibits anti‑apoptotic qualities. The present study evaluated the neuroprotective effects of dexmedetomidine pretreatment against propofol‑induced neurotoxicity in immature hippocampal neurons...
October 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27569194/urinary-t-t-muconic-acid-as-a-proxy-biomarker-of-car-exhaust-and-neurobehavioral-performance-in-15-year-olds
#17
Michal Kicinski, Nelly D Saenen, Mineke K Viaene, Elly Den Hond, Greet Schoeters, Michelle Plusquin, Vera Nelen, Liesbeth Bruckers, Isabelle Sioen, Ilse Loots, Willy Baeyens, Harry A Roels, Tim S Nawrot
INTRODUCTION: Traffic-related air pollution has been shown to induce neurotoxicity in rodents. Several recent epidemiological studies reported negative associations between residential outdoor air pollution and neurobehavioral performance. We investigated in a population of non-smoker adolescents the associations between the urinary concentration of trans, trans-muconic acid (t,t-MA-U), a metabolite of benzene and used as proxy-biomarker of traffic exposure, and two neurobehavioral domains, i...
August 25, 2016: Environmental Research
https://www.readbyqxmd.com/read/27567812/shear-induced-amyloid-formation-in-the-brain-i-potential-vascular-and-parenchymal-processes
#18
Conrad N Trumbore
Shear distortion of amyloid-beta (Aβ) solutions accelerates amyloid cascade reactions that may yield different toxic oligomers than those formed in quiescent solutions. Recent experiments indicate that cerebrospinal fluid (CSF) and interstitial fluid (ISF) containing Aβ flow through narrow brain perivascular pathways and brain parenchyma. This paper suggests that such flow causes shear distortion of Aβ molecules involving conformation changes that may be one of the initiating events in the etiology of Alzheimer's disease...
September 6, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27558076/the-ganglioside-gm-1-inhibits-bupivacaine-induced-neurotoxicity-in-mouse-neuroblastoma-neuro2a-cells
#19
Yujie Liang, Jiemei Ji, Yunan Lin, Yajun He, Jingchen Liu
OBJECTIVE: Studies indicate that bupivacaine-induced neurotoxicity results from apoptosis. Gangliosides have been shown to promote neuronal repair and recovery of neurological function after spinal cord injury. Previously, we confirmed that in vivo administration of the ganglioside GM-1 attenuated bupivacaine-induced neurotoxicity in various animal models; however, the underlying mechanism remains unclear. METHODS: Cells of the neuroblastoma line N2a (Neuro2a cells) were divided into three experimental groups: control, bupivacaine-treated, and bupivacaine-treated with GM-1 pretreatment...
August 2016: Cell Biochemistry and Function
https://www.readbyqxmd.com/read/27537918/ethanol-induced-neurodegeneration-and-glial-activation-in-the-developing-brain
#20
REVIEW
Mariko Saito, Goutam Chakraborty, Maria Hui, Kurt Masiello, Mitsuo Saito
Ethanol induces neurodegeneration in the developing brain, which may partially explain the long-lasting adverse effects of prenatal ethanol exposure in fetal alcohol spectrum disorders (FASD). While animal models of FASD show that ethanol-induced neurodegeneration is associated with glial activation, the relationship between glial activation and neurodegeneration has not been clarified. This review focuses on the roles of activated microglia and astrocytes in neurodegeneration triggered by ethanol in rodents during the early postnatal period (equivalent to the third trimester of human pregnancy)...
August 16, 2016: Brain Sciences
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