RESUMO
We investigated the teratogenic effect of an ethylene glycol-methyl cellosolve mixture on gestating Wistar rats, that received a daily intraperitoneal dose of different concentration of the mixture on day 8 of gestation until day 20. Multivariate analysis and Post-Hoc Bonferroni tests were used and relative risk and attributable fraction were calculated. In rats treated with the mixture the number of live fetuses decreased and reabsorptions increased with increasing concentrations of the mixture, as well as the number of abnormal fetuses. Abnormalities consisted mainly in atypical craniofacial morphology, protruding tongue, edema, signs of growth delay and shorter limbs, their frequency and severity increased at higher concentrations of the mixture. We conclude that the ethylene glycol-methyl cellosolve mixture possesses a higher teratogenic potential than each of its constituents separately, producing external fetal abnormalities, growth delay, and increased fetal death.
Se investigó el efecto teratogénicos de una mezcla de etilenglicol y metilcelosolve en ratas gestantes, las cuales recibieron por vía intraperitoneal una dosis diaria, a diferentes concentraciones de la mezcla, del día 8 al día 20 de gestación. Se utilizaron las pruebas de análisis multivariado y Post-Hoc de Bonferroni, y se calcularon el riesgo relativo y la fracción atribuible. En las ratas tratadas con la mezcla el número de fetos vivos disminuyó y las reabsorciones y el número de fetos anormales aumentaron a mayor concentración de los solventes. Las anormalidades fetales consistieron principalmente en morfología atípica craneofacial, protrusión de la lengua, edema, signos de retraso de crecimiento y acortamiento de extremidades, y su frecuencia y severidad se incrementó a mayor concentración de la mezcla. Concluimos que la mezcla de etilenglicol-metilcelosolve tiene mayor efecto teratogénico que cuando actúan cada uno de los solventes por separado, produciendo anormalidades fetales externas, retraso del crecimiento y aumento de muerte fetal.
Assuntos
Animais , Feminino , Gravidez , Ratos , Feto/anormalidades , Feto , Etilenoglicóis/administração & dosagem , Teratogênicos/toxicidade , Anormalidades Induzidas por Medicamentos , Análise de Variância , Anormalidades Craniofaciais/induzido quimicamente , Deformidades Congênitas dos Membros/induzido quimicamente , Etilenoglicol/administração & dosagem , Ratos WistarRESUMO
Retinoic acid is a widely used drug in the treatment of cystic acné. It has teratogenic effects that depend on the gestational period in which it is used. We report a seven months of female whose mother was exposed to retinoic acid in both pregestational and gestational periods. She had a retardation of psychomotor development and a brain MRI showed frontal atrophy and a malformation of the posterior fossa. We discuss the mechanisms ofthe teratogenic effeets of retinoic acid.