Neurotoxic Agents
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Studies on new substituted pyridazinones: synthesis and biological evaluation
We report herein the synthesis and pharmacological evaluation of a new series of 6-aryl-2-(imidazol-1-yl/1,2,4-triazol-1-yl)-2-methyl-4,5-dihydro-(2H)-pyridazin-3-one (3a-j) as potential anticonvulsant and antitubercular agents. The title compounds were prepared by reacting 6-aryl-4,5-dihydro-(2H)-pyridazin-3-one (2a-e) with formaldehyde and secondary cyclic
Braz. J. Pharm. Sci.. Publicado em: 29/11/2018
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2. Pharmacological characterization of cnidarian extracts from the Caribbean Sea: evaluation of anti-snake venom and antitumor properties
Abstract Background: Cnidarians produce toxins, which are composed of different polypeptides that induce pharmacological effects of biotechnological interest, such as antitumor, antiophidic and anti-clotting activities. This study aimed to evaluate toxicological activities and potential as antitumor and antiophidic agents contained in total extracts from fi
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 21/09/2018
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3. Neurotoxic Effects Associated with Current Uses of Organophosphorus Compounds
Organophosphorus compounds (OPs) are a large and diverse class of chemicals that have been synthesized, since the XIX century for several purposes like chemical weapons, flame-retardants, ectoparasiticides and investigational new drugs, but mainly as agrochemicals in agriculture and indoor. Although the amount of OP pesticides being used is declining, especi
J. Braz. Chem. Soc.. Publicado em: 2016-05
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4. Defesa química: histórico, classificação dos agentes de guerra e ação dos neurotóxicos
Chemical agents are substances used for their toxic effects on humans, animals and plants. The main objective of chemical defense is to develop systems that reduce these effects while minimizing impact on the operational capacity of military troops. In this work, a report on the development of chemical warfare agents since the First World War and their class
Quím. Nova. Publicado em: 2012
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5. Estudo da desativação do agente VX usando o MgO por cálculos ab initio
The organophosphates are used in industry, in the fields of dyes, varnishes, artificial leather, electrical insulation, waterproofing, plastics, oil additives and solvents, are also used in medicine to treat diseases such as glaucoma, in the household and in agriculture are applied as insecticides and pesticides. Besides these various civilian facilities, th
Publicado em: 2009
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6. Biomarkers of Environmental Contamination in athorops spixii inthe Santos/ São Vicente and Cananéia estuarines, São Paulo, Brazil / Biomarcadores de contaminação ambiental em Cathorops spixii nos Estuários de Santos/São Vicente e Cananéia, São Paulo, Brasil
The aim of this study was to characterize the contamination processes in Santos/São Vicente and Cananéia estuaries; and to study somatic, biochemical, genotoxic and morphological biomarkers in Cathorops spixii. The results of hydrochemistry, nutrients and total mercury concentration confirmed the largest human influence in Santos/São Vicente estuary, main
Publicado em: 2008
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7. The influence of heparin at a low concentration agaist the myotoxicity of Bothrops jararacussu and bothropstoxin-I / A influencia da heparina em baixa concentração sobre a miotoxicidade do veneno de Bothrops jararacussu e bothropstoxina da heparina -I
Bothrops jararacussu venom (Bjssu) and its myotoxin bothropstoxin-I (BthTX-I) induce neurotoxicity and myotoxicity. Since the treatment with the antivenom is weakly efficient against the myotoxicity, many reports concentrate on studies utilizing substances that neutralize the myotixicity activity induced by the venom, including heparin. The objectives of thi
Publicado em: 2007
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8. Influencia de ions manganes sobre os efeitos dos venenos das serpentes Crotalus durissus terrificus e Bothrops jararacussu / Effects of manganese ( Mn POT.2+ ) on the neurotoxic and myotoxic activities caused by Crotalus durissus terrificus and Bothrops jararacussu venoms in chick biventer cervicis preparations
In this study, we examined the effects of Mn2+, a neuromuscular blocker with pre and postsynaptic actions, on the neurotoxicity and myotoxicity induced by Crotalus durissus terrificus and Bothrops jararacussu venoms in chick biventer cervicis preparations. Pretreating the preparations with Mn2+ (0.66 or 1.6 mM) did not affect the blockade induced by C. d. te
Publicado em: 2006
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9. Neurotoxic, myotoxic and cytotoxic action from the venom of the snake Lachesis muta muta (Bushmaster) : biochemistry and biological characterization of a PLA2 (LmTX-I) isolated from this venom / Ação neurotoxica, miotoxica e citotoxica do veneno de Lachesi muta muta (surucucu) : caraterização bioquimica e biologica de uma PLA2 (LmTX-I) presente neste veneno
A subespécie Lachesis m. muta vive em florestas tropicais úmidas de difícil acesso, dificultando sua captura e/ou manutenção em cativeiro (obtenção do veneno). Uma revisão de 20 casos de acidentes ofídicos com humanos ocorridos na Costa Rica, Guiana Francesa, Brasil, Colômbia e Venezuela, confidentemente atribuídos a este gênero de serpente, desc
Publicado em: 2006
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10. Estudos estrutura-função de neurotoxinas isoladas de veneno crotálico e botrópico : análise comparativa de neurotoxicidade e mitoxicidade / Structure-function study of neurotoxins purified of crotalic and bothropic venom: comparative analysis of the neurotoxicity and myotoxicity
Through optimized methodologies of purification in HPLC, new toxins were purified from total venom of Crotalus durissus collilineatus (V-1), Bothrops jararacussus PLA2 D49 Bj-V (Bj-IV isoform) obtained from the fraction BthTX-II and Bothrops alternatus PLA2 K49 Bt II-2; with a high level of purity and molecular homogeneity, with no loss of biological activit
Publicado em: 2005
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11. Analise do cDNA e dedução da estrutura primaria de uma PLA2 basica, neurotoxica in vitro, do complexo crotoxina, a partir de mRNA extraido do veneno total de Crotalus durissus collilineatus / Analysis of the cDNA and deduction of the primary structure of a basic, neurotoxic PLA2 in vitro, of the crotoxina complex, from mRNA extracted of the whole venom of Crotalus durissus collilineatus
Enquanto estudos estruturais de toxinas de veneno de serpentes são feitos usando amostras de veneno, a construção de cDNAs precursores destas toxinas requer o sacrifício do espécime para a extração da glândula de veneno. No presente trabalho nós descrevemos uma técnica simples para isolar mRNAs presentes em amostras de veneno total. Para ilustrar e
Publicado em: 2005
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12. Insights into the physiological function of cellular prion protein
Prions have been extensively studied since they represent a new class of infectious agents in which a protein, PrPsc (prion scrapie), appears to be the sole component of the infectious particle. They are responsible for transmissible spongiform encephalopathies, which affect both humans and animals. The mechanism of disease propagation is well understood and
Brazilian Journal of Medical and Biological Research. Publicado em: 2001-05