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https://www.readbyqxmd.com/read/28092161/estimation-of-ellagic-acid-and-or-repaglinide-effects-on-insulin-signaling-oxidative-stress-and-inflammatory-mediators-of-liver-pancreas-adipose-tissue-and-brain-in-insulin-resistant-type-2-diabetic-rats
#1
Mohamed M Amin, Mahmoud S Arbid
Even though ellagic acid has previously been valued in many models of cancer, so far its full mechanistic effect as a natural antiapoptotic agent in the prevention of type 2 diabetes complications has not been completely elucidated, which was the goal of this study. We fed albino rats a high-fat fructose diet (HFFD) for 2 months to induce insulin resistance/type 2 diabetes and then treated the rats with ellagic acid (10 mg/kg body weight, orally) and/or repaglinide (0.5 mg/kg body weight, orally) for 2 weeks...
October 21, 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28076832/dietary-supplementation-of-grape-seed-and-skin-flour-mitigates-brain-oxidative-damage-induced-by-a-high-fat-diet-in-rat-gender-dependency
#2
Kamel Charradi, Mohamed Mahmoudi, Takwa Bedhiafi, Safwen Kadri, Salem Elkahoui, Ferid Limam, Ezzedine Aouani
It is unknown whether gender has an impact on brain injury in obesity, and, if so, whether treatment with grape seed and skin flour could exert a protective effect. Both male and female rats were fed a standard diet (SD) or a high fat diet (HFD) during eight weeks and treated with high dosage grape seed and skin flour (GSSF). Fat-induced oxidative stress was evaluated into the brain with a special emphasis on transition metals determination. HFD induced male-cholesterol overload (+78.12%) and an oxidative stress status characterized by increased lipoperoxidation (+68...
January 8, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28074227/heavy-metals-in-liver-and-brain-of-waterfowl-from-the-evros-delta-greece
#3
Maria Aloupi, Asimina Karagianni, Savas Kazantzidis, Triantaphyllos Akriotis
The concentrations of six heavy metals (cadmium [Cd], chromium [Cr], copper [Cu], manganese [Mn], lead [Pb], and zinc [Zn]) were determined in liver and brain of nine species of waterfowl from the Evros Delta, one of the most important wetlands in Greece, to assess metal contamination and potential risk to waterfowl. Significant differences among species were found for hepatic Cr, Cu, Pb, and Zn; the highest levels of all metals were found in liver of mute swans. Cd increased significantly with age in both organs of wigeon; some differences were also observed between males and females of the same species...
January 10, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28059788/silicic-acid-and-beer-consumption-reverses-the-metal-imbalance-and%C3%A2-the%C3%A2-prooxidant-status-induced-by%C3%A2-aluminum-nitrate-in-mouse-brain
#4
María José González-Muñoz, Alba Garcimartán, Isabel Meseguer, Carmen José Mateos-Vega, José María Orellana, Antonio Peña-Fernández, Juana Benedí, Francisco J Sánchez-Muniz
BACKGROUND: Emerging evidence suggests that by affecting mineral balance, aluminum (Al) may enhance some events associated with neurodegenerative diseases. AIM: To examine the effect of Al(NO3)3 exposure on brain Al, cooper (Cu), iron (Fe), magnesium (Mg), manganese (Mn), silicon (Si), and zinc (Zn) levels, and the metal-change implication in brain oxidant and inflammatory status. METHODS: Four groups of six-week-old male NMRI mice were treated for three months: i) controls, administrated with deionized water; ii) Al, which received Al(NO3)3; iii) Al+silicic acid, which were given Al(NO3)3 plus silicic acid; and iv) Al+beer, which received Al(NO3)3 plus beer...
December 3, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28054837/radiosurgery-alters-the-endothelial-surface-proteome-externalized-intracellular-molecules-as-potential-vascular-targets-in-irradiated-brain-arteriovenous-malformations
#5
Lucinda S McRobb, Vivienne S Lee, Margaret Simonian, Zhenjun Zhao, Santhosh George Thomas, Markus Wiedmann, Jude V Amal Raj, Michael Grace, Vaughan Moutrie, Matthew J McKay, Mark P Molloy, Marcus A Stoodley
Stereotactic radiosurgery (SRS) is an established treatment for brain arteriovenous malformations (AVMs) that drives blood vessel closure through cellular proliferation, thrombosis and fibrosis, but is limited by a delay to occlusion of 2-3 years and a maximum treatable size of 3 cm. In this current study we used SRS as a priming tool to elicit novel protein expression on the endothelium of irradiated AVM vessels, and these proteins were then targeted with prothrombotic conjugates to induce rapid thrombosis and vessel closure...
January 5, 2017: Radiation Research
https://www.readbyqxmd.com/read/28040552/chemoprotective-role-of-quercetin-in-manganese-induced-toxicity-along-the-brain-pituitary-testicular-axis-in-rats
#6
Isaac A Adedara, Temitayo I Subair, Valerie C Ego, Oluwasetemi Oyediran, Ebenezer O Farombi
Reproductive dysfunction in response to manganese exposure has been reported in humans and animals. Quercetin, a bioflavonoid widely distributed in fruits, vegetables and beverages has been shown to possess antioxidant, anti-inflammatory and anti-apoptotic activities in different experimental model systems. However, there is dearth of scientific information on the influence of quercetin on manganese-induced reproductive toxicity. This study was designed to evaluate the influence of quercetin on manganese-induced functional alterations along the brain-pituitary- testicular axis in rats...
December 28, 2016: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28038985/exploring-the-mechanism-by-which-accumbal-deep-brain-stimulation-attenuates-morphine-induced-reinstatement-through-manganese-enhanced-mri-and-pharmacological-intervention
#7
Lei Zhang, Ying Cui, Ying-Chun Wang, Hong Yin, Jian-Min Zheng, Lu Huang, Zhen-Wei Zhao, Jiang Li
Deep brain stimulation (DBS) of the nucleus accumbens (NAc) has been applied to attenuate drug relapses in animal studies and clinical treatments. However, the mechanisms by which DBS produces its therapeutic effects remain largely unknown. This study is the first to combine manganese-enhanced magnetic resonance imaging (MRI) with DBS to explore the effects of accumbal DBS on the relapse pathway of rats. The images suggested that DBS produced an antidromic activation of the cortico-accumbal afferents. To verify the activating effects of DBS, the expression levels of the protein encoded by the immediate early gene c-Fos following DBS were measured using immunochemical methods...
December 27, 2016: Experimental Neurology
https://www.readbyqxmd.com/read/27995976/in-vivo-memri-characterization-of-brain-metastases-using-a-3d-look-locker-t1-mapping-sequence
#8
Charles R Castets, Néha Koonjoo, Andreea Hertanu, Pierre Voisin, Jean-Michel Franconi, Sylvain Miraux, Emeline J Ribot
Although MEMRI (Manganese Enhanced MRI) informations were obtained on primary tumors in small animals, MEMRI data on metastases are lacking. Thus, our goal was to determine if 3D Look-Locker T1 mapping was an efficient method to evaluate Mn ions transport in brain metastases in vivo. The high spatial resolution in 3D (156 × 156 × 218 μm) of the sequence enabled to detect metastases of 0.3 mm(3). In parallel, the T1 quantitation enabled to distinguish three populations of MDA-MB-231 derived brain metastases after MnCl2 intravenous injection: one with a healthy blood-tumor barrier that did not internalize Mn(2+) ions, and two others, which T1 shortened drastically by 54...
December 20, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27995398/a-slc39a8-variant-causes-manganese-deficiency-and-glycosylation-and-mitochondrial-disorders
#9
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...
December 19, 2016: Journal of Inherited Metabolic Disease
https://www.readbyqxmd.com/read/27990119/oral-administration-of-sitagliptin-activates-creb-and-is-neuroprotective-in-murine-model-of-brain-trauma
#10
Brian DellaValle, Gitte S Brix, Birgitte Brock, Michael Gejl, Jørgen Rungby, Agnete Larsen
Introduction: Traumatic brain injury is a major cause of mortality and morbidity. We have previously shown that the injectable glucagon-like peptide-1 (GLP-1) analog, liraglutide, significantly improved the outcome in mice after severe traumatic brain injury (TBI). In this study we are interested in the effects of oral treatment of a different class of GLP-1 based therapy, dipeptidyl peptidase IV (DPP-IV) inhibition on mice after TBI. DPP-IV inhibitors reduce the degradation of endogenous GLP-1 and extend circulation of this protective peptide in the bloodstream...
2016: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/27989617/the-application-of-pbpk-models-in-estimating-human-brain-tissue-manganese-concentrations
#11
Siva P Ramoju, Donald R Mattison, Brittany Milton, Doreen McGough, Natalia Shilnikova, Harvey J Clewell, Miyoung Yoon, Michael D Taylor, Daniel Krewski, Melvin E Andersen
Mn is an essential element that causes neurotoxicity in humans when inhaled at high concentrations. This metal has well-recognized route-dependent differences in absorption, with greater proportionate uptake for inhalation versus dietary exposure. Physiologically-based pharmacokinetic (PBPK) models for Mn have included these route specific differences in uptake and their effect on delivery of Mn to target tissues via systemic circulation. These PBPK models include components describing ingestion and inhalation, homeostatic control (concentration dependent biliary elimination and gastrointestinal absorption), and delivery to target sites within the brain...
December 15, 2016: Neurotoxicology
https://www.readbyqxmd.com/read/27984200/multi-system-state-shifts-and-cognitive-deficits-induced-by-chronic-morphine-during-abstinence
#12
Haichen Niu, Guanqun Zhang, Haiying Li, Qiang Zhang, Tongzhou Li, Sheng Ding, Lei Wang, Zhonghai Zhang, Yuehua Qiao, Min Hu
Chronic morphine administration induces neural plasticity followed by withdraw. And clinic observation indicates that obvious cognitive deficits are found during withdrawal. However, current neural substrates that regulate dysfunction in withdrawal are unknown. In our studies, chronic morphine administration was used to induce the spontaneous withdrawal model in rats. A series of cognitive abilities was tested to explore brain function. To further evaluate the neural substrates of dysfunction, Manganese-enhanced MRI(MEMRI) was used to map the dysfunctional regions in vivo...
October 28, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/27983596/estrogenic-endocrine-disrupting-chemicals-influencing-nrf1-regulated-gene-networks-in-the-development-of-complex-human-brain-diseases
#13
REVIEW
Mark Preciados, Changwon Yoo, Deodutta Roy
During the development of an individual from a single cell to prenatal stages to adolescence to adulthood and through the complete life span, humans are exposed to countless environmental and stochastic factors, including estrogenic endocrine disrupting chemicals. Brain cells and neural circuits are likely to be influenced by estrogenic endocrine disruptors (EEDs) because they strongly dependent on estrogens. In this review, we discuss both environmental, epidemiological, and experimental evidence on brain health with exposure to oral contraceptives, hormonal therapy, and EEDs such as bisphenol-A (BPA), polychlorinated biphenyls (PCBs), phthalates, and metalloestrogens, such as, arsenic, cadmium, and manganese...
December 13, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27917122/glucagon-like-peptide-1-analog-liraglutide-delays-onset-of-experimental-autoimmune-encephalitis-in-lewis-rats
#14
Brian DellaValle, Gitte S Brix, Birgitte Brock, Michael Gejl, Anne M Landau, Arne Møller, Jørgen Rungby, Agnete Larsen
Introduction: Recent findings indicate that metabolic disturbances are involved in multiple sclerosis (MS) pathology and influence the susceptibility to treatment, directing attention toward anti-diabetic drugs such as metformin and pioglitazone. Liraglutide, a drug of the glucagon-like peptide-1 (GLP-1) family, is also anti-diabetic and weight-reducing and is, moreover, directly neuroprotective and anti-inflammatory in a broad spectrum of experimental models of brain disease. In this study we investigate the potential for this FDA-approved drug, liraglutide, as a treatment for MS by utilizing the experimental model, experimental autoimmune encephalitis (EAE)...
2016: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/27912164/manganese-ii-chloride-alters-behavioral-and-neurochemical-parameters-in-larvae-and-adult-zebrafish
#15
Stefani Altenhofen, Melissa Talita Wiprich, Laura Roesler Nery, Carlos Eduardo Leite, Monica Ryff Moreira Roca Vianna, Carla Denise Bonan
Manganese (Mn) is an essential metal for organisms, but high levels can cause serious neurological damage. The aim of this study was to evaluate the effects of MnCl2 exposure on cognition and exploratory behavior in adult and larval zebrafish and correlate these findings with brain accumulation of Mn, overall brain tyrosine hydroxylase (TH) levels, dopamine (DA) levels, 3,4-dihydroxyphenylacetic acid (DOPAC) levels and cell death markers in the nervous system. Adults exposed to MnCl2 for 4days (0.5, 1.0 and 1...
January 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/27908423/copper-brain-protein-protection-against-free-radical-induced-neuronal-death-survival-ratio-in-sh-sy5y-neuroblastoma-cell-cultures
#16
Roger Deloncle, Bernard Fauconneau, Olivier Guillard, José Delaval, Gérard Lesage, Alain Pineau
In Creutzfeldt Jakob, Alzheimer and Parkinson diseases, copper metalloproteins such as prion, amyloid protein precursor and α-synuclein are able to protect against free radicals by reduction from cupric Cu(+2) to cupreous Cu(+). In these pathologies, a regional copper (Cu) brain decrease correlated with an iron, zinc or manganese (Mn) increase has previously been observed, leading to local neuronal death and abnormal deposition of these metalloproteins in β-sheet structures. In this study we demonstrate the protective effect of Cu metalloproteins against deleterious free-radical effects...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27908416/suppression-of-the-brain-pituitary-testicular-axis-function-following-acute-arsenic-and-manganese-co-exposure-and-withdrawal-in-rats
#17
Isaac A Adedara, Amos O Abolaji, Ifeoluwa O Awogbindin, Ebenezer O Farombi
Despite the fact that most environmental exposures to metals do not occur in isolation, the combined effects of metal mixtures on brain-pituitary-gonadal axis are poorly known. The present study investigated the impacts of co-exposure to arsenic (As) and manganese (Mn) on sperm characteristics, reproductive hormones and selected oxidative stress indices in the brain, testes and epididymis of rats following exposure for 15 consecutive days to 60mg/L of AsO2Na and 30mg/L of MnCl2 in drinking water. The results showed that while the brain weight remained unaffected, the fluid intake and the weights of testes and epididymis significantly (p<0...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27901646/the-time-dependent-health-and-biochemical-effects-in-rats-exposed-to-stainless-steel-welding-dust-and-its-soluble-form
#18
Tadeusz Halatek, Magdalena Stanislawska, Irena Kaminska, Malgorzata Cieslak, Radoslaw Swiercz, Wojciech Wasowicz
Welding processes that generate fumes containing toxic metals, such as hexavalent chromium (Cr(VI)), manganese (Mn), and nickel (Ni), have been implicated in lung injury, inflammation, and lung tumor promotion in animal models. The principal objective of this study was to determine the dynamics of toxic effects of inhalation exposure to morphologically rated welding dust from stainless steel welding and its soluble form in TSE System with a dynamic airflow. We assessed the pulmonary toxicity of welding dust in Wistar rats exposed to 60...
November 30, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27889641/increased-mitochondrial-superoxide-in-the-brain-but-not-periphery-sensitizes-mice-to-angiotensin-ii-mediated-hypertension
#19
Adam J Case, Jun Tian, Matthew C Zimmerman
Angiotensin II (AngII) elicits the production of superoxide (O2(•-)) from mitochondria in numerous cell types within peripheral organs and in the brain suggesting a role for mitochondrial-produced O2(•-) in the pathogenesis of hypertension. However, it remains unclear if mitochondrial O2(•-) is causal in the development of AngII-induced hypertension, or if mitochondrial O2(•-) in the absence of elevated AngII is sufficient to increase blood pressure. Further, the tissue specific (i.e. central versus peripheral) redox regulation of AngII hypertension remains elusive...
November 20, 2016: Redox Biology
https://www.readbyqxmd.com/read/27889621/identifying-non-toxic-doses-of-manganese-for-manganese-enhanced-magnetic-resonance-imaging-to-map-brain-areas-activated-by-operant-behavior-in-trained-rats
#20
Rita Gálosi, Csaba Szalay, Mihály Aradi, Gábor Perlaki, József Pál, Roy Steier, László Lénárd, Zoltán Karádi
Manganese-enhanced magnetic resonance imaging (MEMRI) offers unique advantages such as studying brain activation in freely moving rats, but its usefulness has not been previously evaluated during operant behavior training. Manganese in a form of MnCl2, at a dose of 20mg/kg, was intraperitoneally infused. The administration was repeated and separated by 24h to reach the dose of 40mg/kg or 60mg/kg, respectively. Hepatotoxicity of the MnCl2 was evaluated by determining serum aspartate aminotransferase, alanine aminotransferase, total bilirubin, albumin and protein levels...
November 24, 2016: Magnetic Resonance Imaging
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