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1.
Curr Res Toxicol ; 1: 149-160, 2020 Jun 10.
Artigo em Inglês | MEDLINE | ID: mdl-34345844

RESUMO

Statins are a class of drugs that act lowering lipid levels by inhibiting cholesterol biosynthesis. Additionally, statins can act by "pleiotropic effects", related to the inhibition of synthesis of the other mevalonate pathway products. Rosuvastatin is a third-generation statin and has shown better results in reducing cholesterol concentrations when compared to other statins. Recent studies suggest that rosuvastatin may act as an endocrine disruptor that potentially damages the hormonal axis and, consequently reproductive development and function of male rats. However, the effects of rosuvastatin exposure on rat female reproductive parameters remain unknown. In this study female rats were exposed to rosuvastatin at the doses of 0 (control), 3, or 10 mg/Kg.bw-1/day from pre-puberty to adulthood. No alterations in the female reproductive parameters were observed at a dose of 3 mg/Kg.bw-1. However, females exposed to 10 mg/Kg.bw-1 exhibited shorter estrous cycles, altered copulatory behavior, decreased serum prolactin level, and alterations in the liver, pituitary and placental weights, parameters to some extent influenced by the reproductive hormonal axis signaling pathway. On the other hand, pubertal onset, reproductive hormone levels, fertility, and histological parameters of the ovary, uterus, and placenta were unaltered by exposure to both doses of this statin. Thus, rosuvastatin exposure, at the higher dose, altered the reproductive function of female rats, probably due to the pleiotropic effects of this statin. Additional studies on the effects of this statin on female reproductive function and development are encouraged to better characterize its mode of action.

2.
J Appl Toxicol ; 37(9): 1065-1072, 2017 09.
Artigo em Inglês | MEDLINE | ID: mdl-28326570

RESUMO

Betamethasone is the drug of choice for antenatal treatment, promoting fetal lung maturation and decreasing mortality. Previous studies in rats reported male programming and alteration in sperm parameters and sexual behavior following intrauterine betamethasone exposure. The impact on the female reproductive development is not known. In this study, rat female offspring was assessed for sexual development, morphophysiology of the reproductive tract and fertility after maternal exposure to 0.1 mg kg-1 of betamethasone or vehicle on gestational days 12, 13, 18 and 19. The treatment promoted reduction of litter weight on postnatal day 1, morphological masculinization in females, delay in the age of puberty onset, reduction in estrus number, increase in estrous cycle length and increase in luteinizing hormone serum levels and uterus weight. The females from the betamethasone group showed an increase of myometrial uterine area and decrease in endometrial uterine area. These animals also performed less lordosis during the sexual behavior test and showed impaired reproductive performance. The uterus showed higher contraction in the treated group as shown by a pharmacological assay. In conclusion, prenatal betamethasone exposure in rats promoted female masculinization, altered sexual development and reproductive parameters. Copyright © 2017 John Wiley & Sons, Ltd.


Assuntos
Betametasona/toxicidade , Efeitos Tardios da Exposição Pré-Natal/diagnóstico , Reprodução/efeitos dos fármacos , Animais , Peso Corporal , Ciclo Estral/efeitos dos fármacos , Estro/efeitos dos fármacos , Feminino , Fertilidade/efeitos dos fármacos , Hormônio Luteinizante/sangue , Masculino , Exposição Materna/efeitos adversos , Tamanho do Órgão/efeitos dos fármacos , Gravidez , Ratos , Ratos Wistar , Comportamento Sexual Animal/efeitos dos fármacos , Útero/efeitos dos fármacos
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