Effects of Ipomoea carnea aqueous fraction intake by dams during pregnancy on the physical and neurobehavioral development of rat offspring

Abstract

The effects of daily prenatal exposure to 0.0, 0.7, 3.0 and 15.0 mg/kg of the aqueous extract (AQE) of Ipomoea carnea dried leaves on gestational days 5–21 were studied in rat pups and adult offspring. The physical and reflex developmental parameters, open-field, plus-maze, social interaction, forced swimming, catalepsy and stereotyped behaviors, as well as striatal, cortical and hypothalamic monoamine levels (at 140 days of age) were measured. Maternal and offspring body weights were unaffected by exposure to the different doses of the AQE. High postnatal mortality, smaller size at Day 1 of life, reversible hyperflexion of the carpal joints and delay in the opening of both ears and in negative geotaxis were observed in the offspring exposed to the higher dose of AQE. At 60 and 90 days of age, open-field locomotion frequency was quite different between 0.0 and animals treated with 0.7 and 3.0 mg/kg AQE. No changes were observed in the plus-maze, social interaction, forced swimming, catalepsy, stereotyped behavior and central nervous system monoamines concentrations. Dams treated with the higher AQE dose showed severe cytoplasmic vacuolation in liver, kidney, pancreas and thyroid tissues, in contrast to the mild vacuolation observed in the other experimental groups. No alterations were observed in the histopathological study of the offspring of all experimental groups at 140 days of age. During adulthood, behavior was not modified in offspring exposed to the higher dose of AQE as well as no changes occurred in central nervous system neurotransmitters. The present data show that the offspring development alterations were not severe enough to produce behavioral and central monoamine level changes.