Browsing by Author "Paris Pizarro, Irmgard"
Now showing items 1-20 of 23
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Paris Pizarro, Irmgard; Cardenas, Sergio; Lozano, Jorge; Pérez Pastene, Carolina; Graumann, Rebecca; Riveros, Alejandra; Caviedes, Pablo; Segura Aguilar, Juan (2007)Four decades after L-dopa introduction to PD therapy, the cause of Parkinson's disease (PD) remains unknown despite the intensive research and the discovery of a number of gene mutations and delections in the pathogenesis ...
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Paris Pizarro, Irmgard; Pérez Pastene, Carolina; Cárdenas, Sergio; Iturra, Patricio; Muñoz, Patricia; Couve, Eduardo; Caviedes Fernández, Pablo; Segura Aguilar, Juan (SPRINGER, 2010-01-20)Abstract In previous studies, we observed that cells treated with aminochrome obtained by oxidizing dopamine with oxidizing agents dramatically changed cell morphology, thus posing the question if such morphological changes ...
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Briceño, Andrea; Muñoz, Patricia; Brito, Patricia; Huenchuguala, Sandro; Segura Aguilar, Juan; Paris Pizarro, Irmgard (Springer New York LLC, 2016)© 2015, Springer Science+Business Media New York.In this study, we investigated the role of adducts formation between aminochrome and tubulin and its interference in microtubules assembly and stability in aminochrome-induced ...
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Paris Pizarro, Irmgard; Muñoz, Patricia; Huenchuguala, Sandro; Couve, Eduardo; Sanders, Laurie H.; Greenamyre, John Timothy; Caviedes, Pablo; Segura Aguilar, Juan (2011)Aminochrome, the precursor of neuromelanin, has been proposed to be involved in the neurodegeneration neuromelanincontaining dopaminergic neurons in Parkinson's disease. We aimed to study the mechanism of aminochrome-dependent ...
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Muñoz, Patricia; Paris Pizarro, Irmgard; Segura Aguilar, Juan (Frontiers Media S.A., 2016)
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Copper neurotoxicity in rat substantia Nigra and striatum is dependent on DT-diaphorase inhibition Díaz Véliz, Gabriela; Paris Pizarro, Irmgard; Taiba Mora, Sergio; Raisman Vozari, Rita; Segura Aguilar, Juan (2008)The dependence of copper neurotoxicity on DT-diaphorase inhibition was suggested from results obtained from a cell line derived from substantia nigra. Therefore, the aim of this study was to evaluate whether CuSO4 neurotoxicity ...
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Paris Pizarro, Irmgard; Dagnino Subiabre, Alexies; Marcelain Cubillos, Katherine; Bennett, L. B.; Caviedes Fernández, Pablo; Caviedes Codelia, Raúl; Olea Azar, Claudio; Segura Aguilar, Juan (BLACKWELL SCIENCE LTD, 2001-04)The mechanism of copper (Cu) neurotoxicity was studied in the RCSN-3 neuronal dopaminergic cell line, derived from substantia nigra of an adult rat. The formation of a Cu-dopamine complex was accompanied by oxidation of ...
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Muñoz, Patricia; Paris Pizarro, Irmgard; Segura Aguilar, Juan (Frontiers Research Foundation, 2016)
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Stuardo Novoa, Cecilia (Universidad de Chile, 2012)La contaminación de cultivos celulares por Mollicutes es frecuente a nivel mundial y muy relevante ya que estas bacterias producen un amplio rango de alteraciones metabólicas y cromosómicas en las células afectadas que ...
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Paris Pizarro, Irmgard; Martínez Alvarado, P.; Cárdenas, S.; Pérez Pastene, C.; Graumann, Rebecca; Fuentes, P.; Olea Azar, Claudio; Caviedes Fernández, Pablo; Segura Aguilar, Juan (AMER CHEMICAL SOC, 2005-03)We report a new and specific mechanism for iron-mediated neurotoxicity using RCHT cells, which were derived from rat hypothalamus. RCHT cells exhibit immunofluorescent-positive markers for dopamine beta-hydroxylase and the ...
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Paris Pizarro, Irmgard; Pérez Pastene, Carolina; Cárdenas, Sergio; Iturriaga-Vásquez, Patricio; Muñoz, Patricia; Couve, Eduardo; Caviedes, Pablo; Segura Aguilar, Juan (Springer New York LLC, 2010)
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Muñoz, Patricia; Huenchuguala, Sandro; Paris Pizarro, Irmgard; Cuevas, Carlos; Villa, Mónica; Caviedes, Pablo; Segura Aguilar, Juan; Tizabi, Yousef (2012)
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Huenchuguala, Sandro; Muñoz, Patricia; Zavala, Patricio; Villa, Mónica; Urriola Cuevas, Carlos; Ahumada, Ulises; Graumann, Rebecca; Nore, Beston F.; Couve, Eduardo; Mannervik, Bengt; Paris Pizarro, Irmgard; Segura Aguilar, Juan (Taylor and Francis Inc., 2014)U373MG cells constitutively express glutathione S-transferase mu 2 (GSTM2) and exhibit 3H-dopamine uptake, which is inhibited by 2 μM of nomifensine and 15 μM of estradiol. We generated a stable cell line (U373MGsiGST6) ...
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Urriola Cuevas, Carlos; Huenchuguala, Sandro; Muñoz, Patricia; Villa, Mónica; Paris Pizarro, Irmgard; Mannervik, Bengt; Segura Aguilar, Juan (Springer, 2015)U373MG cells are able to take up aminochrome that induces glutathione transferase M2-2 (GSTM2) expression in a concentration-dependent manner where 100 A mu M aminochrome increases GSTM2 expression by 2.1-fold (P < 0.001) ...
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Zucca, Fabio A.; Segura Aguilar, Juan; Ferrari, Emanuele; Muñoz, Patricia; Paris Pizarro, Irmgard; Sulzer, David; Sarna, Tadeusz; Casella, Luigi; Zecca, Luigi (Elsevier, 2017)There are several interrelated mechanisms involving iron, dopamine, and neuromelanin in neurons. Neuromelanin accumulates during aging and is the catecholamine-derived pigment of the dopamine neurons of the substantia ...
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Paris Pizarro, Irmgard; Martínez Alvarado, Pedro; Pérez Pastene, Carolina; Vieira, Marcelo N.N.; Olea Azar, Claudio; Raisman Vozari, Rita; Cárdenas, Sergio; Graumann, Rebecca; Caviedes Fernández, Pablo; Segura Aguilar, Juan (BLACKWELL PUBLISHING LTD, 2005-03)The role of dopamine in iron uptake into catecholaminergic neurons, and dopamine oxidation to aminochrome and its one-electron reduction in iron-mediated neurotoxicity, was studied in RCSN-3 cells, which express both ...
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Hurtado Guzmán, C.; Martínez Alvarado, P.; Dagnino Subiabre, A.; Paris Pizarro, Irmgard; Caviedes Fernández, Pablo; Caviedes Codelia, Raúl; Cassels Niven, Bruce; Segura Aguilar, Juan (Taylor & Francis Ltd, 2001-05-04)Monoamine oxidase-A (MAO-A) (amiflamine (AMF) and 4-methylthioamphetamine (MTA)) and MAO-B (Ldeprenyl) inhibitors were found to be cytotoxic in a concentration-dependent manner for RCHTcells derived from adult rat ...
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Muñoz, Patricia; Paris Pizarro, Irmgard; Sanders, Laurie H.; Greenamyre, J. Timothy; Segura Aguilar, Juan (2012)We tested the hypothesis that both VMAT-2 and DT-diaphorase are an important cellular defense against aminochrome-dependent neurotoxicity during dopamine oxidation. A cell line with VMAT-2 and DT-diaphorase over-expressed ...
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Martínez Alvarado, P.; Dagnino Subiabre, Alexies; Paris Pizarro, Irmgard; Metodiewa, D.; Welch, C. J.; Olea Azar, Claudio; Caviedes Fernández, Pablo; Caviedes Codelia, Raúl; Segura Aguilar, Juan (ACADEMIC PRESS INC, 2001-05-25)The endogenous dopamine-derived neurotoxin salsolinol was found to decrease survival in the dopaminergic neuronal cell line RCSN-3, derived from adult rat substantia nigra in a concentration-dependent manner (208 muM ...
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Segura Aguilar, Juan; Paris Pizarro, Irmgard; Muñoz, Patricia; Ferrari, Emanuele; Zecca, Luigi; Zucca, Fabio A. (International Society for Neurochemistry,, 2014)The molecular mechanisms causing the loss of dopaminergic neurons containing neuromelanin in the substantia nigra and responsible for motor symptoms of Parkinson’s disease are still unknown. The discovery of genes ...