Detecção de swainsonina e calisteginas em espécies de Convolvulaceae do semiárido de Pernambuco

• Ano de defesa: 2018
• Autor(a) principal: SILVEIRA, Marcelo da Motta
• Orientador(a): MENDONÇA, Fábio de Souza
• Banca de defesa: MENDONÇA, Fábio de Souza, ALMEIDA, Valdir Morais de, SOUZA, Francisco de Assis Leite
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• dARK ID: ark:/57462/0013000008k6p
• Idioma: por
• Instituição de defesa: Universidade Federal Rural de Pernambuco
• Programa de Pós-Graduação: Programa de Pós-Graduação em Ciência Animal Tropical
• Departamento: Departamento de Morfologia e Fisiologia Animal
• País: Brasil
• Palavras-chave em Português: Convolvulaceae; Planta tóxica; Swainsonina; Calistegina
• Área do conhecimento CNPq: CIENCIAS AGRARIAS::MEDICINA VETERINARIA
• Link de acesso: http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/7286

The Convolvulaceae family is considered endemic in Brazil and some species that belong to this family have toxic principles in their composition while others still present unknown active principles. Among the genera that make up the family, the genus Ipomoea contains important toxic plant species being epidemiologically important for the semiarid region of Pernambuco due to the variability of species and concentration of their active principles that may be related to cases of intoxication in production animals. These intoxications occur mainly due to the scarcity of pasture caused by the prolonged period of drought in the semi-arid region. Right after the first rains, these plants sprout; the animals ingest them and develop the clinical signs chronically. The establishment of poisoning is caused by the presence of swainsonine, a substance responsible for causing neurological changes associated with the storage of oligosaccharides, usually irreversible, and reproductive problems. Species can present only swainsonine or be associated with calystegines. However, studies still do not prove their real participation in the intoxication in ruminants. This dissertation consists of an article that deals with a study carried out during the rainy season in the Moxotó/Pernambuco Sertão micro region, which includes the municipalities of Arcoverde, Sertânia, Betânia, Ibimirim, Custódia, Inajá and Manari, to determine the occurrence of species of Convolvulaceae that contains toxic alkaloids in the region. In the study, the plants were georeferenced, photographed, collected for botanical identification and determination of the active principles. Samples containing 500g of the leaves of each species were collected, shade dried, crushed, mixed to constitute a pool of samples and analyzed by liquid chromatography coupled to mass spectrometry and the presence of calystegines and swainsonine was verified through gas chromatography - mass spectrometry (GC/MS). The study resulted in the discovery of new species of Convolvulaceae that present variable concentrations of swainsonine and calystegines in their composition that may be epidemiologically important for association with the occurrence of lysosomal storage disease in ruminants from the region studied.