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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Estudo dos efeitos tóxicos da administração prolongada de Ipomea carnea em caprinos / Study of the toxic effects of long-term administration of Ipomoea carnea to goats

Breno Schumaher Henrique 08 March 2002 (has links)
Ipomoea carnea, planta tóxica da família da Convolvulaceae, possui a suainsonina um alcalóide indolizidínico, o qual promove inibição da enzima α-manosidase ácida ou lisossômica levando ao acúmulo celular de oligossacarídeos não metabolizados adequadamente, causando vacuolização celular. A planta também possui outros alcalóides, as calisteginas que inibem as β-glicosidases, agravando o efeito causado pela suainsonina. O objetivo do presente estudo foi de avaliar as possíveis alterações clínicas, bioquímicas, hematológicas, neuroquímica e patológicas em caprinos tratados com diferentes doses de I. carnea. Foram usados 25 caprinos, divididos em 5 grupos iguais: 4 experimental e 1 controle. Os caprinos dos grupos experimentais receberam durante 4 meses diferentes doses de I. carnea: 2,5; 5,0; 10,0 e 30,0 g/kg/dia. Semanalmente, os animais foram pesados e avaliados clinicamente. Coletou-se sangue da veia jugular, quinzenalmente, para determinação da concentração de glicose, colesterol, alanina transferase (ALT), aspartato transaminase (AST), uréia e creatinina, e mensalmente para a determinação do hemograma. No final do período experimental, todos os caprinos foram submetidos à eutanásia e fragmentos de cérebro, medula espinal, nervo ciático, tireóide, miocárdio, fígado, rim, baço, pulmão, pâncreas e intestinos foram coletados e fixados para estudo anatomopatológico. Os resultados mostraram que os animais experimentais apresentavam nistagmo, tremores musculares, fraqueza dos membros pélvicos, incoordenação motora e ataxia. O estudo bioquímico revelou que os animais experimentais apresentaram menores níveis de glicose e aumento nos níveis de AST, ALT e creatinina. O estudo hematológico mostrou significante redução nos níveis de hemácias, hemoglobina e hematócrito. A histopatologia revelou alterações vacuolares no fígado, pâncreas, tireóide, células renais e em neurônios do sistema nervoso central. Os resultados apresentados permitem concluir, que a ingestão da I. carnea produz toxicidade para a espécie caprina de forma dose-dependente. / Ipomoea carnea, a shrub plant of Convolvulaceae family, possess swainsonine, an indolizidinic alkaloid, which promotes cellular accumulation of not metabolized oligossacarides, due to inhibition of acid or lisossomal α-manosidasis enzyme, causing cellular vacuolization. The plant also has other alkaloid, the calystegein, which inhibits β-glicosidase, aggravating the effect of the swainsonine. The objective of the present study was to evaluate the possible clinical, biochemical, hematological, pathological and neurochemistry alterations in goat treated with different doses of green leaves of the Ipomoea carnea. It was used 25 goats, divided in 5 equal groups: 4 experimental and 1 control. Goats from experimental groups received, during 4 months the different doses of Ipomoea carnea: 2,5; 5,0; 10,0 and 30,0 9 of plantlkg of live weight Iday. Weekly, the animais were weighted and evaluated clinically. Before the experimental period and every other week blood samples were taken from jugular vein in order to determine the and the concentration of the glucose, cholesterol, alanine transaminase (ALT), aspartate transaminase (AST), γ-glutamyltransferase (GGT), blood urea nitrogen (BUN), and creatinina, and every month to determinate the hemogram. At the end of the experimental period, ali the goats were killed and fragments from brain, spinal cord, sciatic nerve, thyroids, myocardium, liver, kidney, spleen, lung, pancreas, intestine were collect, fixed in 10% formalin and routinely embedded in paraffin. Results showed that the animais from ali experimental groups presented nystagmus, muscular tremors, weakness of the hind limbs, incoordination of movement and ataxia. The biochemical study revealed that these animais presented significant increase in the AST, ALT and creatinine levels, when compared with goats from control group. The hematological study showed significant reduction in the levels of hemoglobin, and hematocrit in ali goats that had been treated with Ipomoea carnea. The histopathology revealed degenerative vacuolar alterations of liver, pancreas, thyroid, kidneys cells and in the neurons of the central nervous system in animais that received the plant and these alterations were more prominent in goats treated with the higher dose of I.carnea. Thus, the results presented here permit to conclude that the ingestion of Ipomoea carnea, is certainly toxic in goat production.
2

Estudo dos efeitos tóxicos da administração prolongada de Ipomea carnea em caprinos / Study of the toxic effects of long-term administration of Ipomoea carnea to goats

Henrique, Breno Schumaher 08 March 2002 (has links)
Ipomoea carnea, planta tóxica da família da Convolvulaceae, possui a suainsonina um alcalóide indolizidínico, o qual promove inibição da enzima α-manosidase ácida ou lisossômica levando ao acúmulo celular de oligossacarídeos não metabolizados adequadamente, causando vacuolização celular. A planta também possui outros alcalóides, as calisteginas que inibem as β-glicosidases, agravando o efeito causado pela suainsonina. O objetivo do presente estudo foi de avaliar as possíveis alterações clínicas, bioquímicas, hematológicas, neuroquímica e patológicas em caprinos tratados com diferentes doses de I. carnea. Foram usados 25 caprinos, divididos em 5 grupos iguais: 4 experimental e 1 controle. Os caprinos dos grupos experimentais receberam durante 4 meses diferentes doses de I. carnea: 2,5; 5,0; 10,0 e 30,0 g/kg/dia. Semanalmente, os animais foram pesados e avaliados clinicamente. Coletou-se sangue da veia jugular, quinzenalmente, para determinação da concentração de glicose, colesterol, alanina transferase (ALT), aspartato transaminase (AST), uréia e creatinina, e mensalmente para a determinação do hemograma. No final do período experimental, todos os caprinos foram submetidos à eutanásia e fragmentos de cérebro, medula espinal, nervo ciático, tireóide, miocárdio, fígado, rim, baço, pulmão, pâncreas e intestinos foram coletados e fixados para estudo anatomopatológico. Os resultados mostraram que os animais experimentais apresentavam nistagmo, tremores musculares, fraqueza dos membros pélvicos, incoordenação motora e ataxia. O estudo bioquímico revelou que os animais experimentais apresentaram menores níveis de glicose e aumento nos níveis de AST, ALT e creatinina. O estudo hematológico mostrou significante redução nos níveis de hemácias, hemoglobina e hematócrito. A histopatologia revelou alterações vacuolares no fígado, pâncreas, tireóide, células renais e em neurônios do sistema nervoso central. Os resultados apresentados permitem concluir, que a ingestão da I. carnea produz toxicidade para a espécie caprina de forma dose-dependente. / Ipomoea carnea, a shrub plant of Convolvulaceae family, possess swainsonine, an indolizidinic alkaloid, which promotes cellular accumulation of not metabolized oligossacarides, due to inhibition of acid or lisossomal α-manosidasis enzyme, causing cellular vacuolization. The plant also has other alkaloid, the calystegein, which inhibits β-glicosidase, aggravating the effect of the swainsonine. The objective of the present study was to evaluate the possible clinical, biochemical, hematological, pathological and neurochemistry alterations in goat treated with different doses of green leaves of the Ipomoea carnea. It was used 25 goats, divided in 5 equal groups: 4 experimental and 1 control. Goats from experimental groups received, during 4 months the different doses of Ipomoea carnea: 2,5; 5,0; 10,0 and 30,0 9 of plantlkg of live weight Iday. Weekly, the animais were weighted and evaluated clinically. Before the experimental period and every other week blood samples were taken from jugular vein in order to determine the and the concentration of the glucose, cholesterol, alanine transaminase (ALT), aspartate transaminase (AST), γ-glutamyltransferase (GGT), blood urea nitrogen (BUN), and creatinina, and every month to determinate the hemogram. At the end of the experimental period, ali the goats were killed and fragments from brain, spinal cord, sciatic nerve, thyroids, myocardium, liver, kidney, spleen, lung, pancreas, intestine were collect, fixed in 10% formalin and routinely embedded in paraffin. Results showed that the animais from ali experimental groups presented nystagmus, muscular tremors, weakness of the hind limbs, incoordination of movement and ataxia. The biochemical study revealed that these animais presented significant increase in the AST, ALT and creatinine levels, when compared with goats from control group. The hematological study showed significant reduction in the levels of hemoglobin, and hematocrit in ali goats that had been treated with Ipomoea carnea. The histopathology revealed degenerative vacuolar alterations of liver, pancreas, thyroid, kidneys cells and in the neurons of the central nervous system in animais that received the plant and these alterations were more prominent in goats treated with the higher dose of I.carnea. Thus, the results presented here permit to conclude that the ingestion of Ipomoea carnea, is certainly toxic in goat production.

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