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Manganese basal ganglia

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https://www.readbyqxmd.com/read/29594872/calcium-calmodulin-stimulated-adenylyl-cyclases-1-and-8-regulate-reward-related-brain-activity-and-ethanol-consumption
#1
Kelly E Bosse, Farhad Ghoddoussi, Ajay T Eapen, Jennifer L Charlton, Laura L Susick, Kirt Desai, Bruce A Berkowitz, Shane A Perrine, Alana C Conti
Evidence suggests a predictive link between elevated basal activity within reward-related networks (e.g., cortico-basal ganglia-thalamic networks) and vulnerability for alcoholism. Both calcium channel function and cyclic adenosine monophosphate (cAMP)/protein kinase A-mediated signaling are critical modulators of reward neurocircuitry and reward-related behaviors. Calcium/calmodulin-stimulated adenylyl cyclases (AC) 1 and 8 are sensitive to activity-dependent increases in intracellular calcium and catalyze cAMP production...
March 28, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29545824/the-impact-of-environmental-mn-exposure-on-insect-biology
#2
REVIEW
Yehuda Ben-Shahar
Manganese (Mn) is an essential trace element that acts as a metal co-factor in diverse biochemical and cellular functions. However, chronic environmental exposure to high levels of Mn is a well-established risk factor for the etiology of severe, atypical parkinsonian syndrome (manganism) via its accumulation in the basal ganglia, pallidum, and striatum brain regions, which is often associated with abnormal dopamine, GABA, and glutamate neural signaling. Recent studies have indicated that chronic Mn exposure at levels that are below the risk for manganism can still cause behavioral, cognitive, and motor dysfunctions via poorly understood mechanisms at the molecular and cellular levels...
2018: Frontiers in Genetics
https://www.readbyqxmd.com/read/29193034/hypermanganesemia-with-dystonia-polycythemia-and-cirrhosis-in-10-patients-six-novel-slc30a10-mutations-and-further-phenotype-delineation
#3
M S Zaki, M Y Issa, H M Elbendary, H El-Karaksy, H Hosny, C Ghobrial, A El Safty, A El-Hennawy, A Oraby, L Selim, M S Abdel-Hamid
Biallelic mutations in the SLC30A10 gene cause an inborn error of Mn metabolism characterized by hypermanganesemia, polycythemia, early-onset dystonia, and liver cirrhosis (HMDPC). To date, only 14 families from various ethnic groups have been reported. Here, we describe 10 patients from 7 unrelated Egyptian families with HMDPC. Markedly elevated blood Mn levels, the characteristic basal ganglia hyperintensity on T1-weighted images, and variable degrees of extrapyramidal manifestations with or without liver disease were cardinal features in all patients...
November 28, 2017: Clinical Genetics
https://www.readbyqxmd.com/read/29187042/effect-of-discontinuation-of-manganese-supplementation-from-home-parenteral-nutrition-solutions-on-whole-blood-levels-and-magnetic-resonance-imaging-of-the-brain-a-5-year-cohort-study
#4
Jennifer Jin, Olivia Saqui, Johane P Allard
BACKGROUND: Manganese (Mn) is included in current premixed multiple trace element (TE) additives for home parenteral nutrition (HPN). However, there is a risk of oversupplementation of Mn due to contamination from PN additives. Oversupplementation can produce Mn toxicity with neurologic symptoms and abnormalities on brain magnetic resonance imaging (MRI). In 2009, we reported that whole-blood Mn levels were above the upper limit of normal in 16 HPN patients, with 81% having MRI findings...
March 1, 2017: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/29155171/manganese-chloride-induces-histone-acetylation-changes-in-neuronal-cells-its-role-in-manganese-induced-damage
#5
Zhenkun Guo, Zhipeng Zhang, Qingqing Wang, Jie Zhang, Lijin Wang, Qunwei Zhang, Huangyuan Li, Siying Wu
Manganese neurotoxicity presents with Parkinson-like symptoms, with degeneration of dopaminergic neurons in the basal ganglia as the principal pathological feature. Manganese neurotoxicity studies may contribute to a better understanding of the mechanism of Parkinson's disease. Here, we examined the effects of manganese on histone acetylation, a major epigenetic change in chromatin that can regulate gene expression, chromatin remodelling, cell cycle progression, DNA repair and apoptosis. In this study, we found that manganese chloride (MnCl2 ) may significantly suppress the acetylation of histone H3 and H4 in PC12 cells and SHSY5Y cells in a time-dependent manner...
November 16, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/29071558/the-relation-between-brain-mri-findings-and-blood-manganese-levels-in-renal-transplantation-hemodialysis-and-peritoneal-dialysis-patients
#6
Esra Akcan, Sultan Özkurt, Garip Sahin, Ahmet Ugur Yalcin, Baki Adapinar
PURPOSE: Various factors can affect blood and tissue levels of trace elements in patients with end-stage renal disease. There are a few studies showing hyperintensity of basal ganglia associated with manganese deposition in hemodialysis (HD) patients. The present study aimed to investigate the intensity changes as markers of manganese deposition in the basal ganglia and to demonstrate their association with blood manganese levels using ICP/MS technique in HD, peritoneal dialysis (PD), and renal transplant patients...
January 2018: International Urology and Nephrology
https://www.readbyqxmd.com/read/29054681/role-of-histone-acetylation-in-activation-of-nuclear-factor-erythroid-2-related-factor-2-heme-oxygenase-1-pathway-by-manganese-chloride
#7
Zhipeng Zhang, Zhenkun Guo, Yanting Zhan, Huangyuan Li, Siying Wu
Manganese neurotoxicity is characterized by Parkinson-like symptoms with degeneration of dopaminergic neurons in the basal ganglia as the principal pathological feature. Manganese neurotoxicity studies may contribute to a good understanding of the mechanism of Parkinson's disease (PD). In this study, we first confirmed that MnCl2 can promote the expression of nuclear factor erythroid 2-related factor 2 (Nrf2) protein in the nucleus or cytoplasm while increasing the binding activity of Nrf2 and antioxidant response elements, further promoting the expression of downstream target gene heme oxygenase 1 (HO-1) and leading to increase levels of reactive oxygen species (ROS) and reduce the levels of reduced glutathione (GSH)...
December 1, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29032009/potential-for-stem-cell-treatment-in-manganism
#8
Thatiane C de Moura, Szeifoul Afadlal, Alan S Hazell
Development of manganism (also known as manganese neurotoxicity) is a major complication of manganese exposure in which neurological dysfunction is linked to accumulation of the metal in brain. Due to neuronal cell death in basal ganglia structures, particularly the globus pallidus, functional recovery is limited. Bearing a resemblance to Parkinson's disease, effective treatment for manganism is currently limited. However, the rapidly developing field of stem cell research offers new hope for the treatment of illnesses in which neurodegeneration is a major feature...
January 2018: Neurochemistry International
https://www.readbyqxmd.com/read/28918510/acquired-hepatocerebral-degeneration-ahd-a-peculiar-neurological-impairment-in-advanced-chronic-liver-disease
#9
A Pigoni, F Iuculano, C Saetti, L Airaghi, L Burdick, S Spreafico, M Curioni, R Lombardi, L Valenti, A L Fracanzani, S Fargion
We discuss the case of a rare and often unrecognized neurologic syndrome, called Acquired Hepatocerebral Degeneration (AHD), observed in patients with advanced liver disease and portosystemic shunts. The clinical manifestations can be very heterogeneous and in our case included a combination of cerebellar and extrapyramidal signs, arisen in a period of few days. Brain Magnetic Resonance Imaging (MRI) showed, in T1-weighted images, diffuse bilateral hyper intensities in basal ganglia and biemispheric brain and cerebellar cortices, resembling paramagnetic deposits...
February 2018: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28889261/manganese-and-developmental-neurotoxicity
#10
REVIEW
Roberto Lucchini, Donatella Placidi, Giuseppa Cagna, Chiara Fedrighi, Manuela Oppini, Marco Peli, Silvia Zoni
Manganese (Mn) is an essential metal that plays a fundamental role for brain development and functioning. Environmental exposure to Mn may lead to accumulation in the basal ganglia and development of Parkinson-like disorders. The most recent research is focusing on early-life overexposure to Mn and the potential vulnerability of younger individuals to Mn toxicity also in regard to cognitive and executive functions through the involvement of the frontal cortex.Neurodevelopmental disturbances are increasing in the society, and understanding the potential role of environmental determinants is a key for prevention...
2017: Advances in Neurobiology
https://www.readbyqxmd.com/read/28648949/welding-related-brain-and-functional-changes-in-welders-with-chronic-and-low-level-exposure
#11
Eun-Young Lee, Michael R Flynn, Mechelle M Lewis, Richard B Mailman, Xuemei Huang
Although an essential nutrient, manganese (Mn) can be toxic at high doses. There is, however, uncertainty regarding the effects of chronic low-level Mn-exposure. This review provides an overview of Mn-related brain and functional changes based on studies of a cohort of asymptomatic welders who had lower Mn-exposure than in most previous work. In welders with low-level Mn-exposure, we found: 1) Mn may accumulate in the brain in a non-linear fashion: MRI R1 (1/T1) signals significantly increased only after a critical level of exposure was reached (e...
January 2018: Neurotoxicology
https://www.readbyqxmd.com/read/28539244/manganese-exposure-induces-neuroinflammation-by-impairing-mitochondrial-dynamics-in-astrocytes
#12
Souvarish Sarkar, Emir Malovic, Dilshan S Harischandra, Hilary A Ngwa, Anamitra Ghosh, Colleen Hogan, Dharmin Rokad, Gary Zenitsky, Huajun Jin, Vellareddy Anantharam, Anumantha G Kanthasamy, Arthi Kanthasamy
Chronic manganese (Mn) exposure induces neurotoxicity, which is characterized by Parkinsonian symptoms resulting from impairment in the extrapyramidal motor system of the basal ganglia. Mitochondrial dysfunction and oxidative stress are considered key pathophysiological features of Mn neurotoxicity. Recent evidence suggests astrocytes as a major target of Mn neurotoxicity since Mn accumulates predominantly in astrocytes. However, the primary mechanisms underlying Mn-induced astroglial dysfunction and its role in metal neurotoxicity are not completely understood...
January 2018: Neurotoxicology
https://www.readbyqxmd.com/read/28521822/central-nervous-system-manganese-induced-lesions-and-clinical-consequences-in-patients-with-hereditary-hemorrhagic-telangiectasia
#13
M M Serra, C H Besada, A Cabana Cal, A Saenz, C V Stefani, D Bauso, A B Golimstok, J C Bandi, D H Giunta, C M Elizondo
BACKGROUND: Around 47-74% of patients with hereditary hemorrhagic telangiectasia (HHT) have hepatic vascular malformations (HVMs); magnetic resonance images (MRI) of the central nervous system (CNS) might show in T1 sequences a hyper-intensity signal in different areas, mainly in the basal ganglia (BG) as consequence of manganese (Mn) deposits as observed in cirrhotic patients. These patients might suffer from different neuropsychiatric disorders (hepatic encephalopathy). In HHT patients, even in the presence of hepatic shunts, hepatocellular function is usually preserved...
May 18, 2017: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/28445108/manganese-provision-in-parenteral-nutrition-an-update
#14
Callum Livingstone
Manganese (Mn) is an essential micronutrient required for the activity of metalloenzymes. It is an essential component of parenteral nutrition (PN), but requirements are low. Mn status is difficult to assess, with the commonest method being measurement of its concentration in whole blood. This method has limitations, including artifactually high concentrations resulting from contamination of specimen tubes. Mn toxicity is a well-recognized complication of PN, the risk of which increases if there is cholestasis or if the patient has received high doses...
April 1, 2017: Nutrition in Clinical Practice
https://www.readbyqxmd.com/read/28378122/interplay-between-lysosomal-mitochondrial-and-death-receptor-pathways-during-manganese-induced-apoptosis-in-glial-cells
#15
R M Gorojod, A Alaimo, S Porte Alcon, F Saravia, M L Kotler
Manganese (Mn) is an essential trace metal which plays a critical role in brain physiology by acting as a cofactor for several enzymes. However, upon overexposure, Mn preferentially accumulates within the basal ganglia leading to the development of a Parkinsonism known as Manganism. Data from our group have proved that Mn induces oxidative stress-mediated apoptosis in astrocytoma C6 cells. In the present study we described how cathepsins impact on different steps of each apoptotic cascade. Evidence obtained demonstrated that Mn generates lysosomal membrane permeabilization (LMP) and cathepsin release...
September 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28274800/a-screening-tool-to-detect-clinical-manganese-neurotoxicity
#16
Brad A Racette, Anat Gross, Susan R Criswell, Harvey Checkoway, Susan Searles Nielsen
Manganese (Mn) over-exposure in occupational settings is associated with basal ganglia toxicity and a movement disorder characterized by parkinsonism (i.e., the signs and symptoms of Parkinson disease). A simple test to help non-neurologists identify workers with clinical Mn neurotoxicity represents an unmet need. In a cohort of Mn-exposed workers from welding worksites, with extensive clinical data, we developed a linear regression model to predict the Unified Parkinson Disease Rating Scale motor subsection part 3 (UPDRS3) score...
January 2018: Neurotoxicology
https://www.readbyqxmd.com/read/28246661/whole-brain-metallomic-analysis-of-the-common-marmoset-callithrix-jacchus
#17
B Knauer, P Majka, K J Watkins, A W R Taylor, D Malamanova, B Paul, Hsin-Hao Yu, A I Bush, D J Hare, D H Reser
Despite the importance of transition metals for normal brain function, relatively little is known about the distribution of these elemental species across the different tissue compartments of the primate brain. In this study, we employed laser ablation-inductively coupled plasma-mass spectrometry on PFA-fixed brain sections obtained from two adult common marmosets. Concurrent cytoarchitectonic, myeloarchitectonic, and chemoarchitectonic measurements allowed for identification of the major neocortical, archaecortical, and subcortical divisions of the brain, and precise localisation of iron, manganese, and zinc concentrations within each division...
April 19, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/28193543/reduction-of-manganese-intake-improves-neuropsychological-manifestations-in-rats-with-minimal-hepatic-encephalopathy
#18
Ying Li, Li Hong Mei, Jin Wei Qiang, Chang Xue Ji, Shuai Ju
Brain manganese deposition is led by liver dysfunction and/or portal-systemic shunting in minimal hepatic encephalopathy (MHE). Manganese is toxic and can cause cognitive disorders and extrapyramidal symptoms. Thus, reduction of manganese intake might be considered as a potential treatment strategy for MHE. In this study we aimed to investigate whether low- or no-manganese feed can improve the neuropsychological manifestations in MHE rats. Rats with MHE were established by partially ligating the portal vein and fed a manganese diet (MHE-M, 10mg per kg feed; n=24), a no-manganese diet (MHE-N; n=24) and a half-manganese diet (MHE-H; n=24) for 2, 4, 6 and 8weeks, with six rats in each subgroup...
April 7, 2017: Neuroscience
https://www.readbyqxmd.com/read/28155922/mapping-the-basal-ganglia-alterations-in-children-chronically-exposed-to-manganese
#19
Yi Lao, Laurie-Anne Dion, Guillaume Gilbert, Maryse F Bouchard, Gabriel Rocha, Yalin Wang, Natasha Leporé, Dave Saint-Amour
Chronic manganese (Mn) exposure is associated with neuromotor and neurocognitive deficits, but the exact mechanism of Mn neurotoxicity is still unclear. With the advent of magnetic resonance imaging (MRI), in-vivo analysis of brain structures has become possible. Among different sub-cortical structures, the basal ganglia (BG) has been investigated as a putative anatomical biomarker in MR-based studies of Mn toxicity. However, previous investigations have yielded inconsistent results in terms of regional MR signal intensity changes...
February 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/27995398/a-slc39a8-variant-causes-manganese-deficiency-and-glycosylation-and-mitochondrial-disorders
#20
Lisa G Riley, Mark J Cowley, Velimir Gayevskiy, Tony Roscioli, David R Thorburn, Kristina Prelog, Melanie Bahlo, Carolyn M Sue, Shanti Balasubramaniam, John Christodoulou
SLC39A8 variants have recently been reported to cause a type II congenital disorder of glycosylation (CDG) in patients with intellectual disability and cerebellar atrophy. Here we report a novel SLC39A8 variant in siblings with features of Leigh-like mitochondrial disease. Two sisters born to consanguineous Lebanese parents had profound developmental delay, dystonia, seizures and failure to thrive. Brain MRI of both siblings identified bilateral basal ganglia hyperintensities on T2-weighted imaging and cerebral atrophy...
March 2017: Journal of Inherited Metabolic Disease
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