Avaliação do desenvolvimento do sistema genital e da funçao reprodutiva da prole feminina de ratos Wistar expostos à cisplatina durante a peri-puberdade

• Autor(a) principal: Silva, Patrícia Villela e [UNESP]
• Data de Publicação: 2014
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/110361
• topic: Aparelho genital feminino; Homem - Reprodução; Fármacos; Medicamentos - Efeitos colaterais

Cisplatin is a drug widely used in chemotherapy against several types of malignant tumors such as ovarian and testicular cancer, which is one of the tumors that most affect men in the reproductive age. Its mechanism of action includes its binding to DNA, resulting in the formation of adducts, which can affect the fundamental cellular processes such as replication, transcription and translation, inducing tumor cell death. This drug can also cause adverse effects on male reproduction, since it forms adducts with germ cells, resulting in changes in spermatogenesis. There are evidences that men treated with this drug can maintain their reproductive capacity, and the genetic damages may be transmitted to offspring. In previous work conducted in this laboratory, this fact has been demonstrated in rats, with regard to male offspring. In this context, the aim of this study was to investigate the possible effects of cisplatin on the sexual development and reproductive system of female offspring of male rats exposed to the drug during the peri-pubertal period. For this, male Wistar rats, 45 days old, were allocated into control group, which received saline solution (vehicle), and treated group, which received 1mg/Kg/day of cisplatin diluted in vehicle (n=10/experimental group), five days a week, for three weeks, via intraperitoneal injection. After treatment, the animals were mated with untreated females for the evaluation of the following parameters of female offspring: germ cell counting in fetal ovaries, anogenital distance, number of areolae/nipples, age of vaginal opening (indicative of puberty onset) and first estrus, body weight gain until weaning; at adulthood, weights of vital and reproductive organs were determined, and hormonal measurements, evaluation of the estrous cycle, sexual behavior, fertility, ovarian and uterine histology and immunomarcation for estrogen and progesterone receptors in the ...