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Neurotoxicology

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https://www.readbyqxmd.com/read/29117435/overview-of-neurotoxicology
#1
Lucio G Costa
The nervous system has a central and primary function in the body, and its relevance and complexity make it a target for a large number of toxic substances. The most common forms of neurotoxicity are the death of neurons (neuronopathy), the degeneration of axons (axonopathy), damage to glial cells (e.g., myelinopathy), and interference with the axonal membrane or neurotransmission. Important neurotoxicants are found among pesticides, metals, solvents, natural substances, and industrial chemicals. Environmental chemicals may also contribute to the etiopathogenesis of neurodevelopmental, neuropsychiatric, and neurodegenerative disorders...
November 8, 2017: Current Protocols in Toxicology
https://www.readbyqxmd.com/read/29114259/identification-of-splicing-quantitative-trait-loci-sqtl-in-drosophila-melanogaster-with-developmental-lead-pb-2-exposure
#2
Wen Qu, Katherine Gurdziel, Roger Pique-Regi, Douglas M Ruden
Lead (Pb) poisoning has been a major public health issue globally and the recent Flint water crisis has drawn nation-wide attention to its effects. To better understand how lead plays a role as a neurotoxin, we utilized the Drosophila melanogaster model to study the genetic effects of lead exposure during development and identified lead-responsive genes. In our previous studies, we have successfully identified hundreds of lead-responsive expression QTLs (eQTLs) by using RNA-seq analysis on heads collected from the Drosophila Synthetic Population Resource...
2017: Frontiers in Genetics
https://www.readbyqxmd.com/read/29108800/nano-and-neurotoxicology-an-emerging-discipline
#3
REVIEW
Anna Bencsik, Philippe Lestaevel, Irina Guseva Canu
The present critical review analyzes the question of how nanoparticles from continuously growing industrial production and use of nanomaterials may impact human brain health. Available evidence suggests incomplete effectiveness of protective barriers of the brain against nanoparticles translocation to the brain. This raises concerns of potential effects of manufactured nanoparticles on brain functions, given that nanoparticle's potential to induce oxidative stress, inflammation, death by apoptosis, or changes in the level of expression of certain neurotransmitters...
November 3, 2017: Progress in Neurobiology
https://www.readbyqxmd.com/read/29038777/the-abcd-study-of-neurodevelopment-identifying-neurocircuit-targets-for-prevention-and-treatment-of-adolescent-substance-abuse
#4
James M Bjork, Lisa K Straub, Rosellen G Provost, Michael C Neale
Substance use disorders (SUD) can be considered developmental disorders in light of their frequent origins in substance initiation during adolescence. Cross-sectional functional magnetic resonance imaging (fMRI) studies of adolescent substance users or adolescents with SUD have indicated aberrations in brain structures or circuits implicated in motivation, self-control, and mood-regulation. However, attributing these differences to the neurotoxicological effects of chronic substance use has been problematic in that these circuits are also aberrant in at-risk children, such as those with prenatal substance exposure, externalizing disorders (such as conduct disorder), or prodromal internalizing disorders such as depression...
June 2017: Current Treatment Options in Psychiatry
https://www.readbyqxmd.com/read/28987169/neurotoxicology-and-drug-related-disorders
#5
Serge Weis, Andreas Büttner
Neuropsychiatric disorders caused by toxic substances pose a great diagnostic challenge due to the large variety of changes caused in the central and peripheral nervous system. The pathogenetic mechanisms at work are multifaceted and partly not solved. In human drug abusers (cannabis, opiates, cocaine, amphetamines, methamphetamine and "designer drugs"), a broad spectrum of central nervous system alterations are observed including infarction, intracerebral and subarachnoidal hemorrhage, hypoxic-ischemic leukoencephalopathy, infections, neuronal loss, specific astroglial and microglial reaction patterns, and vascular changes, including the endothelial cell as well as the basal lamina...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28970803/high-frequency-stimulation-of-the-pelvic-nerve-inhibits-urinary-voiding-in-anesthetized-rats
#6
Jonathan J Crook, Thelma A Lovick
Urge Urinary Incontinence: "a sudden and uncontrollable desire to void which is impossible to defer" is extremely common and considered the most bothersome of lower urinary tract conditions. Current treatments rely on pharmacological, neuromodulatory, and neurotoxicological approaches to manage the disorder, by reducing the excitability of the bladder muscle. However, some patients remain refractory to treatment. An alternative approach would be to temporarily suppress activity of the micturition control circuitry at the time of need i...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28969326/thinking-fast-and-slow-highlights-from-the-2016-bja-seminar-on-anaesthetic-neurotoxicity-and-neuroplasticity
#7
S G Soriano, L Vutskits, V Jevtovic-Todorovic, H C Hemmings
No abstract text is available yet for this article.
September 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28968676/lagged-kernel-machine-regression-for-identifying-time-windows-of-susceptibility-to-exposures-of-complex-mixtures
#8
Shelley H Liu, Jennifer F Bobb, Kyu Ha Lee, Chris Gennings, Birgit Claus Henn, David Bellinger, Christine Austin, Lourdes Schnaas, Martha M Tellez-Rojo, Howard Hu, Robert O Wright, Manish Arora, Brent A Coull
The impact of neurotoxic chemical mixtures on children's health is a critical public health concern. It is well known that during early life, toxic exposures may impact cognitive function during critical time intervals of increased vulnerability, known as windows of susceptibility. Knowledge on time windows of susceptibility can help inform treatment and prevention strategies, as chemical mixtures may affect a developmental process that is operating at a specific life phase. There are several statistical challenges in estimating the health effects of time-varying exposures to multi-pollutant mixtures, such as: multi-collinearity among the exposures both within time points and across time points, and complex exposure-response relationships...
September 6, 2017: Biostatistics
https://www.readbyqxmd.com/read/28964377/happy-transition-of-neurotoxicology-editor-in-chief-from-joan-cranmer-to-pamela-lein-and-remco-westerink
#9
EDITORIAL
(no author information available yet)
No abstract text is available yet for this article.
September 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28959621/health-effects-following-subacute-exposure-to-geogenic-dust-collected-from-active-drainage-surfaces-nellis-dunes-recreation-area-las-vegas-nv
#10
Jamie C DeWitt, Brenda J Buck, Dirk Goossens, Yuanxin Teng, James Pollard, Brett T McLaurin, Russell Gerads, Deborah E Keil
The specific health effects of direct inhalation of fine minerogenic dusts generated by natural soil surfaces remain poorly known and relatively little researched. To learn more about this exposure and its contribution to human health effects, we surveyed surface sediment and characterized dust from the Nellis Dunes Recreation Area (NDRA) in Clark County, Nevada, a popular off-road vehicle (ORV) recreational site. Dry drainage systems at NDRA are commonly used as natural trail systems for ORV recreation; these surfaces also are characterized by high concentrations of heavy metals...
2017: Toxicology Reports
https://www.readbyqxmd.com/read/28942534/cholinergic-system-and-oxidative-stress-changes-in-the-brain-of-a-zebrafish-model-chronically-exposed-to-ethanol
#11
Jotele Fontana Agostini, Helena Cristina Zuehl Dal Toé, Karine Medeiros Vieira, Samira Leila Baldin, Naithan Ludian Fernandes Costa, Carolina Uribe Cruz, Larisse Longo, Marcel Marcos Machado, Themis Reverbel da Silveira, Patrícia Fernanda Schuck, Eduardo Pacheco Rico
Ethanol is a widely used drug, and excess or even moderate consumption of ethanol is associated with changes in several neurotransmitter systems, including the cholinergic system. The incidence of alcoholic dementia and its insults are well supported by multiple studies, although the mechanisms of neurotoxicity are still poorly understood. Considering that zebrafish have a complete central nervous system (CNS) and that several signaling systems have already been identified in zebrafish, this neurotoxicological model has become useful...
September 23, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28889277/neurodegeneration-induced-by-metals-in-caenorhabditis-elegans
#12
Felix Antunes Soares, Daiandra Almeida Fagundez, Daiana Silva Avila
Metals are a component of a variety of ecosystems and organisms. They can generally be divided into essential and nonessential metals. The essential metals are involved in physiological processes once the deficiency of these metals has been associated with diseases. Although iron, manganese, copper, and zinc are important for life, it has been evidenced that they are also involved in neuronal damage in many neurodegenerative disorders. Nonessential metals, which are metals without physiological functions, are present in trace or higher levels in living organisms...
2017: Advances in Neurobiology
https://www.readbyqxmd.com/read/28889273/neurotoxicity-of-vanadium
#13
Hilary Afeseh Ngwa, Muhammet Ay, Huajun Jin, Vellareddy Anantharam, Arthi Kanthasamy, Anumantha G Kanthasamy
Vanadium (V) is a transition metal that presents in multiple oxidation states and numerous inorganic compounds and is also an ultra-trace element considered to be essential for most living organisms. Despite being one of the lightest metals, V offers high structural strength and good corrosion resistance and thus has been widely adopted for high-strength steel manufacturing. High doses of V exposure are toxic, and inhalation exposure to V adversely affects the respiratory system. The neurotoxicological properties of V are just beginning to be identified...
2017: Advances in Neurobiology
https://www.readbyqxmd.com/read/28889272/methylmercury-induced-neurotoxicity-focus-on-pro-oxidative-events-and-related-consequences
#14
Marcelo Farina, Michael Aschner
Methylmercury (MeHg) is a highly neurotoxic environmental pollutant. Even though molecular mechanisms mediating MeHg toxicity are not completely understood, several lines of evidence indicate that the neurotoxic effects resultant from MeHg exposure represent a consequence of its pro-oxidative properties. In this regard, MeHg is a soft electrophile that preferentially interacts with (and oxidize) nucleophilic groups (mainly thiols and selenols) from biomolecules, including proteins and low-molecular-weight molecules...
2017: Advances in Neurobiology
https://www.readbyqxmd.com/read/28846969/effects-of-maternal-exposure-to-bisphenol-af-on-emotional-behaviors-in-adolescent-mice-offspring
#15
Miao Gong, Ziqing Huai, Han Song, Lingyu Cui, Qingjun Guo, Juan Shao, Yuan Gao, Haishui Shi
Exposure to bisphenol A (BPA), one kind of environmental endocrine disruptors (EEDs), exerted significantly detrimental effects on neuro-endocrinological system and related disorders, such as memory dysfunction and depression. Bisphenol AF (BPAF),a newly introduced chemical structurally related to BPA, is used extensively. BPAF has stronger estrogenic activities than BPA. However, the potential neurotoxicological effects of BPAF are still elusive. The present study aimed to investigate the potential effects of maternal BPAF exposure during pregnancy on emotional behaviors of adolescent mice offspring...
August 25, 2017: Chemosphere
https://www.readbyqxmd.com/read/28801915/manganese-and-1-methyl-4-phenylpyridinium-induced-neurotoxicity-display-differences-in-morphological-electrophysiological-and-genome-wide-alterations-implications-for-idiopathic-parkinson-s-disease
#16
Rajeswara Babu Mythri, Narayana Reddy Raghunath, Santosh Chandrakant Narwade, Mirazkar Dasharatha Rao Pandareesh, Kollarkandi Rajesh Sabitha, Mohamad Aiyaz, Bipin Chand, Manas Sule, Krittika Ghosh, Senthil Kumar, Bhagyalakshmi Shankarappa, Soundarya Soundararajan, Phalguni Anand Alladi, Meera Purushottam, Narayanappa Gayathri, Deepti Dileep Deobagkar, Thenkanidiyoor Rao Laxmi, Muchukunte Mukunda Srinivas Bharath
Idiopathic Parkinson's disease and manganese-induced atypical parkinsonism are characterized by movement disorder and nigrostriatal pathology. Although clinical features, brain region involved and responsiveness to levodopa distinguish both, differences at the neuronal level are largely unknown. We studied the morphological, neurophysiological and molecular differences in dopaminergic neurons exposed to the Parkinson's disease toxin 1-methyl-4-phenylpyridinium ion (MPP(+) ) and manganese (Mn), followed by validation in the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine and Mn mouse models...
November 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28757310/recommendations-for-harmonization-of-data-collection-and-analysis-of-developmental-neurotoxicity-endpoints-in-regulatory-guideline-studies-proceedings-of-workshops-presented-at-society-of-toxicology-and-joint-teratology-society-and-neurobehavioral-teratology
#17
REVIEW
Abby A Li, Larry P Sheets, Kathleen Raffaele, Virginia Moser, Angela Hofstra, Alan Hoberman, Susan L Makris, Robert Garman, Brad Bolon, Wolfgang Kaufmann, Roland Auer, Edmund Lau, Thomas Vidmar, Wayne J Bowers
The potential for developmental neurotoxicity (DNT) of environmental chemicals may be evaluated using specific test guidelines from the US Environmental Protection Agency or the Organisation for Economic Cooperation and Development (OECD). These guidelines generate neurobehavioral, neuropathological, and morphometric data that are evaluated by regulatory agencies globally. Data from these DNT guideline studies, or the more recent OECD extended one-generation reproductive toxicity guideline, play a pivotal role in children's health risk assessment in different world areas...
July 27, 2017: Neurotoxicology and Teratology
https://www.readbyqxmd.com/read/28739258/inhibition-by-divalent-metal-ions-of-human-histidine-triad-nucleotide-binding-protein1-hhint1-a-regulator-of-opioid-analgesia-and-neuropathic-pain
#18
Rachit Shah, Tsui-Fen Chou, Kimberly M Maize, Alexander Strom, Barry C Finzel, Carston R Wagner
Human histidine triad nucleotide binding protein 1 (hHint1) is a purine nucleoside phosphoramidase and adenylate hydrolase that has emerged as a potential therapeutic target for the management of pain. However, the molecular mechanism of Hint1 in the signaling pathway has remained less clear. The role of metal ions in regulating postsynaptic transmission is well known, and the active site of hHint1 contains multiple histidines. Here we have investigated the effect of divalent metal ions (Cd(2+), Cu(2+), Mg(2+), Mn(2+), Ni(2+), and Zn(2+)) on the structural integrity and catalytic activity of hHint1...
September 23, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28730575/the-effect-of-chronic-fluorosis-on-calcium-ions-and-camkii%C3%AE-and-c-fos-expression-in-the-rat-hippocampus
#19
Yao Teng, Jing Zhang, Zigui Zhang, Juan Feng
This study investigated neurotoxicity of chronic fluorosis in the rat hippocampus. Newly weaning, male, Sprague-Dawley (SD) rats were administered 15, 30, and 60 mg/L sodium fluoride (NaF) solution (fluorine ion concentration 8.25, 16.50, and 33.00 mg/L, respectively), and tap water, for 18 months. The neurotoxicological mechanism was examined with a focus on intracellular calcium overload. Results showed that as the fluoride concentration increased, calcium ion concentration [Ca(2+)], the expression of calcium/calmodulin-dependent protein kinase II α (CaMKIIα), and the expression of catus proto-oncogene protein c-fos (c-fos) all tend to increase...
July 20, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28626759/sertraline-induces-toxicity-and-behavioral-alterations-in-planarians
#20
Isabela Salvador Thumé, Marcos Emílio Frizzo
Toxicity attributed to sertraline has been demonstrated recently in different cell types and also in some organisms. We investigated the effect of sertraline on planarians, which are considered suitable for investigations in neurotoxicology and currently are widely used as an animal model in neuropharmacological studies. Planarians treated with 10 µM sertraline showed a rapid reduction in their spontaneous movement until they became completely motionless and then showed a series of asynchronous paroxysms (seizures) followed by progressive tissue damage, beginning 48 h after the sertraline treatment, and died approximately 72 h later...
2017: BioMed Research International
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