Synaptosomes
Mostrando 1-12 de 155 artigos, teses e dissertações.
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1. Assessment of neuropharmacological potential of low molecular weight components extracted from Rhinella schneideri toad poison
Abstract Background: Studies on toad poison are relevant since they are considered a good source of toxins that act on different biological systems. Among the molecules found in the toad poison, it can be highlighted the cardiotonic heterosides, which have a known mechanism that inhibit Na+/K+-ATPase enzyme. However, these poisons have many other molecules
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 18/04/2019
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2. PERFIL FARMACOLÓGICO DO TIPO ANTIDEPRESSIVO DO COMPOSTO 3-(4-FLUOROFENILSELENIL)-2,5 DIFENILSELENOFENO: ENVOLVIMENTO DO SISTEMA SEROTONINÉRGICO / ANTIDEPRESSANT-LIKE PHARMACOLOGICAL PROFILE OF 3-(4- FLUOROPHENYLSELENYL)-2,5-DIPHENYLSELENOPHENE: INVOLVEMENT OF SEROTONERGIC SYSTEM
Depression is a serious, recurrent and incapacitating psychiatric condition with a heavy social burden. The pharmacological approach to this disorder employs therapy with antidepressant drugs, which have side effects and numerous limitations. In view of the promising pharmacological properties of containing-selenium molecules, this study evaluated the effect
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2011
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3. Involvement of glutamate and reactive oxygen species in methylmercury neurotoxicity
This review addresses the mechanisms of methylmercury (MeHg)- induced neurotoxicity, specifically examining the role of oxidative stress in mediating neuronal damage. A number of critical findings point to a central role for astrocytes in mediating MeHg-induced neurotoxicity as evidenced by the following observations: a) MeHg preferentially accumulates in as
Publicado em: 2010
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4. Efeito das toxinas purificadas pktx23c3, pktx28c4, pktx20c4, pntx19c1, pntx25a1, pntx37c2, pntx19c2, pntx3-2 na liberação de Glutamato em Sinaptosomas Cérebro Corticais de Rato.
Studies revealed that the venom of the Brazilian armed spider Phoneutria nigriventer contains potent neurotoxins that caused excitatory symptoms such as salivation, lachrymation, priapism, convulsions, flaccid and spastic paralysis. It was also reported that the main mechanism of action of those neurotoxins are effects on ion channels such as inhibition of t
Publicado em: 2010
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5. Ureases display biological effects independent of enzymatic activity. Is there a connection to diseases caused by urease-producing bacteria?
Ureases are enzymes from plants, fungi and bacteria that catalyze the hydrolysis of urea to form ammonia and carbon dioxide. While fungal and plant ureases are homo-oligomers of 90-kDa subunits, bacterial ureases are multimers of two or three subunit complexes. We showed that some isoforms of jack bean urease, canatoxin and the classical urease, bind to glyc
Publicado em: 2010
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6. AVALIAÇÃO DA ATIVIDADE DE ECTONUCLEOTIDASES NO CÓRTEX CEREBRAL E PLAQUETAS DE RATOS EXPOSTOS À FUMAÇA DE CIGARRO
Inflammatory and degenerative pathophysiological processes within the central nervous system (CNS) and platelets are important causes of human disease promoted by cigarette smoke. The objective of the present study was to evaluate activity of the enzymes that hydrolyze nucleotides and nucleosides in synaptosomes of cerebral cortex and platelets from rats exp
Publicado em: 2009
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7. EFEITO DO RESVERATROL NOS SISTEMAS COLINÉRGICO E PURINÉRGICO EM ENCÉFALO DE RATOS DIABÉTICOS / EFFECT OF RESVERATROL ON THE CHOLINERGIC AND PURINERGIC SYSTEM IN BRAIN OF DIABETIC RATS
Diabetes mellitus is a major public health problem throughout the world. Besides the most common complications in the peripheral nervous system, diabetes may also cause a series of cognitive, structural and functional alterations in the central nervous system (CNS). Acetylcholinesterase (AChE), NTPDase and 5-nucleotidase are important enzymes involved in neu
Publicado em: 2009
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8. EFEITO NEUROPROTETOR DA CREATINA E AVALIAÇÃO DOS PARÂMETROS CINÉTICOS DA CAPTAÇÃO DE GLUTAMATO INDUZIDOS PELO ÁCIDO GLUTÁRICO NO ESTRIADO DE RATOS / NEUROPROTECTIVE EFFECT OF CREATINE AND EVALUATION OF KINETIC PARAMETERS OF GLUTAMATE UPTAKE INDUCED BY GLUTARIC ACID FROM STRIATUM THE RATS
A acidemia glutárica tipo I (GA-I) é um erro inato do metabolismo (EIM) caracterizada bioquimicamente pelo acúmulo principal de ácido glutárico (GA) e ácido 3-hidroxiglutárico (3-OH-GA), e patologicamente por uma característica degeneração estriatal. Devido à escassez de medidas terapêuticas efetivas para essa acidemia, vários estudos têm inves
Publicado em: 2008
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9. Involvement of glutamate and reactive oxygen species in methylmercury neurotoxicity
This review addresses the mechanisms of methylmercury (MeHg)-induced neurotoxicity, specifically examining the role of oxidative stress in mediating neuronal damage. A number of critical findings point to a central role for astrocytes in mediating MeHg-induced neurotoxicity as evidenced by the following observations: a) MeHg preferentially accumulates in ast
Brazilian Journal of Medical and Biological Research. Publicado em: 2007-03
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10. Ureases display biological effects independent of enzymatic activity: Is there a connection to diseases caused by urease-producing bacteria?
Ureases are enzymes from plants, fungi and bacteria that catalyze the hydrolysis of urea to form ammonia and carbon dioxide. While fungal and plant ureases are homo-oligomers of 90-kDa subunits, bacterial ureases are multimers of two or three subunit complexes. We showed that some isoforms of jack bean urease, canatoxin and the classical urease, bind to glyc
Brazilian Journal of Medical and Biological Research. Publicado em: 2006-07
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11. ENZIMAS QUE HIDROLISAM NUCLEOTÍDEOS DE ADENINA EM SINAPTOSSOMAS DE CÓRTEX CEREBRAL E PLAQUETAS DE RATOS DESMIELINIZADOS PELO BROMETO DE ETÍDIO E TRATADOS COM INTERFERON-β / ENZYMES THAT HYDROLYZE ADENINE NUCLEOTIDES IN SYNAPTOSOMES FROM THE CEREBRAL CORTEX AND PLATELETS OF THE RATS DEMYELINATED BY ETHIDIUM BROMIDE AND TREATED WITH INTERFERON - β.
The activities of the enzymes NTPDase (E.C. 3.6.1.5, apyrase, CD39) and 5-nucleotidase (E.C. 3.1.3.5, CD73) were analyzed in synaptosomes from the cerebral cortex and platelets of rats submitted to demyelination by ethidium bromide (EB) associated with interferon-β (IFN-β) treatment. The following groups were studied: I - control (saline), II - (sa
Publicado em: 2006
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12. Inhibition of L-glutamate and GABA synaptosome uptake by crotoxin, the major neurotoxin from Crotalus durissus terrificus venom
This paper describes a brief study on the crotoxin mechanism of action, regarding the transport of GABA and L-glutamate in rats cortico-cerebral synaptosomes and in heterologous systems, such as COS-7 cells expressing gabaergic transporters, and C6 glioma cells and Xenopus oocytes expressing glutamatergic transporters. Crotoxin concentrations over 1 µM caus
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2004