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1.
Biochimie ; 83(10): 945-51, 2001 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-11728631

RESUMO

We have characterized the serum lipoprotein profile and localized the serum paraoxonase activity of pacu, Piaractus mesopotamicus, a tropical fish species. The total lipoprotein profile of pacu serum obtained after KBr density ultracentrifugation shows the predominance of HDL (1.1267 g/mL). SDS-PAGE electrophoresis revealed a negligible amount of LDL. Pacu HDL was purified by gel filtration column on HPLC, and its molecular mass was estimated to be 246 kDa. Protein composition was 35%, and comprised four protein components with molecular masses of 45, 38, 25 and 12.5 kDa. Lipids represent 58% of total HDL, comprising 40% neutral lipids and 18% phospholipids by weight. The HDL contains 7% of carbohydrates, and mannose was the only sugar detected by paper chromatography in HDL hydrolysates. HDL-containing fractions showed the major paraoxonase activity. Purification of HDL resulted in a 23-fold enrichment of this activity. This is the first experimental evidence demonstrating the association of paraoxonase activity with a HDL in fish.


Assuntos
Esterases/metabolismo , Lipoproteínas HDL/metabolismo , Animais , Arildialquilfosfatase , Peixes , Metabolismo dos Lipídeos , Manose/metabolismo
4.
Eur Respir J ; 6(8): 1226-8, 1993 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-8224140

RESUMO

The case of a boy aged 4 yrs and 7 months, with isolated pulmonary involvement by Langerhans' cell histiocytosis is reported. The presentation of the disease was a sudden pneumothorax, with no previous signs of respiratory disease. The case was confirmed by S-100 and MT1 antibody staining, and was treated with pulse steroids and several pleural drainages, until the boy died after a large bilateral pneumothorax.


Assuntos
Histiocitose de Células de Langerhans/diagnóstico , Pneumopatias/diagnóstico , Pré-Escolar , Histiocitose de Células de Langerhans/complicações , Histiocitose de Células de Langerhans/patologia , Humanos , Pulmão/diagnóstico por imagem , Pulmão/patologia , Pneumopatias/complicações , Pneumopatias/patologia , Masculino , Pneumotórax/etiologia , Radiografia
5.
Artigo em Inglês | MEDLINE | ID: mdl-2576796

RESUMO

1. The major components of hepatic drug biotransformation system were identified in a Brazilian freshwater benthic fish. 2. Cytochrome P-450 difference spectra were obtained adding 0.02 mM phenazine ethosulphate and 2 mM ascorbate to microsomal suspensions. Basal levels of P-450 were high (0.9 nmol/mg of microsomal protein) and were not induced by 3-MC. 3. Microsomal NADPH-cytochrome C reductase activity was determined in presence of 1.3 x 10(-4) M NADPH, 3.3 x 10(-5) M cytochrome C, 1.0 x 10(-4) M EDTA, 66 micrograms of microsomal protein per ml in a 0.3 M Tris-HCl buffer, pH 8.6. Basal levels of NADPH-cytochrome C were 152.7 nmoles/min/mg of microsomal protein.


Assuntos
Peixes/metabolismo , Microssomos Hepáticos/metabolismo , Poluentes Químicos da Água/metabolismo , Poluentes da Água/metabolismo , Animais , Ácido Ascórbico/farmacologia , Brasil , Sistema Enzimático do Citocromo P-450/análise , Feminino , Hemoglobinas/isolamento & purificação , Inativação Metabólica/fisiologia , Masculino , NADPH-Ferri-Hemoproteína Redutase/metabolismo , Fenazinas/farmacologia , Ratos
10.
J. bras. psiquiatr ; J. bras. psiquiatr;30(3): 241-6, 1981.
Artigo em Português | LILACS | ID: lil-6957

RESUMO

O autor, depois de introducao em que esclarece como coloca o assunto dentro dos parametros da psicanalise, passa aos argumentos de sua hipotese. Apoiado em mitos, lendas, crencas religiosas e dados historicos, ve a possibilidade de que o conflito de geracoes seja decorrente de uma tensao agressiva entre pais e filhos, tendo sua origem nos sentimentos de odio reprimido que uma geracao tem contra a que ira lhe substituir.Ressalta o fato de que vem dos estudos da etologia o reforco biologico para essa hipotese


Assuntos
Conflito Psicológico
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