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Estudou-se a ocorrência de apoptose nos placentomos de cabras gestantes intoxicadas experimentalmente com o cipó-preto (Tetrapterys multiglandulosa A.Juss.). Analisou-se morfometricamente a intensidade do processo de apoptose nas células trofoblásticas em cabras controle (grupo III) e em animais submetidos a diferentes dosagens (grupos I e II) de cipó-preto. O grupo I foi composto por quatro cabras gestantes que receberam 10gramas/kg de peso vivo de folhas verdes da referida planta. No grupo II, quatro cabras gestantes receberam 20 gramas/kg de peso vivo de folhas verdes. A quantificação morfométrica da apoptose demonstrou que nas cabras tratadas a apoptose ocorreu com maior intensidade quando comparada com a obtida em animais do grupo-controle. Diferentes dosagens da planta (10 e 20g/kg PV) não foram um fator determinante para a maior ou menor ocorrência de apoptose, apesar de acarretar morte fetal e subseqüente aborto em momentos diferentes. A intensa apoptose em fase ainda inicial da gestação compromete funções normais da placenta, possibilitando uma explicação para a morte fetal e aborto observadas. Conclui-se que a T. multiglandulosa é tóxica para cabras gestantes nas doses de 10 e 20g/kg peso vivo ingeridas durante seis e duas semanas, respectivamente. The role of apoptosis in the pathogenesis of placental dysfunction was studied in pregnant goats experimentally intoxicated with cipó-preto (Tetrapterys multiglandulosa A.Juss.). Twelve animals were distributed in three groups, each one with four pregnant goats. Group I was fed 10g/kg of live weight and group II was fed 20g/kg of live weight and group III was used as control. Although apoptosis occurred in placental cells of all the animals, morphometric analyses demonstrated that goats fed with cipó-preto showed higher apoptotic indices than controls. However no difference could be detected between groups I and II. Different amounts of the plant were not a determinant factor to increase the intensity of apoptosis in the placental tissue, although the final result was fetal death and/or abortion at different moments. Intense apoptosis during the early stage of pregnancy may be detrimental for the normal development and function of the placenta and may help to explain the fetal death and abortion observed. Therefore Tetrapterys multiglandulosa is toxic to pregnant goats when ingested at 10 or 20g/kg of live weight during six or two weeks, respectively

Apoptose no placentomo de cabras gestantes intoxicadas experimentalmente com cipó-preto - Tetrapterys multiglandulosa