RESUMO
Oral administration of gossypol induced sterility in male rats by 10 weeks, at a dose of 15 mg/kg body weight/day. The pituitary FSH gonadotroph cells showed dilated endoplasmic reticulum and accumulation of secretory granules in the cytoplasm. LH cells were degranulated. The Leydig cells showed enhanced synthetic activity. There was no change in testis weight and testicular RNA, lipids and cholesterol in the treated group while significant increase was observed in DNA content. Testicular sialic acid content decreased significantly over controls. The Sertoli cells, spermatogonia, spermatocytes and early spermatids were not affected after the treatment. The weights of prostate, seminal vesicle were recorded normal and there were no ultrastructural variations. The levels of acid and alkaline phosphatase and RNA in prostatic tissue were insignificant as compared with controls. However, DNA content of prostate gland showed a significant increase. Sialic acid of seminal vesicle + coagulating gland were within the control range. A marked reduction in fructose values from the same organ was noted.
Assuntos
Administração Oral , Animais , Anticoncepcionais Masculinos/administração & dosagem , Gossipol/administração & dosagem , Infertilidade Masculina/induzido quimicamente , Masculino , Tamanho do Órgão/efeitos dos fármacos , Adeno-Hipófise/efeitos dos fármacos , Próstata/química , Ratos , Glândulas Seminais/química , Testículo/efeitos dos fármacosRESUMO
Effect of oral administration of gossypol acetic acid (15 mg/kg/day) for 10 weeks, on certain enzymes, which may be taken as markers for the different stages of spermatogenesis, was studied in male albino rats. Gossypol produced a significant decrease in hyaluronidase and sorbitol dehydrogenase, while no change was observed in beta-glucuronidase and acid phosphatase. A significant increase in the total lactate dehydrogenase activity was observed in the testis. The possible significance of these findings is discussed.
Assuntos
Animais , Glucuronidase/metabolismo , Gossipol/farmacologia , Hialuronoglucosaminidase/metabolismo , L-Iditol 2-Desidrogenase/metabolismo , L-Lactato Desidrogenase/metabolismo , Masculino , Ratos , Ratos Endogâmicos , Espermatogênese/efeitos dos fármacos , Testículo/efeitos dos fármacosRESUMO
Adult male Wister rats when administered with 15 mg/kg body weight/day of gossypol acetic acid proved to be sterile by 10 weeks of treatment. The weight of the whole epididymis did not deviate from the controls but when the caput, corpus and cauda epididymidis were considered separately, the cauda epididymidis weight was significantly reduced. The major changes were observed in the motor apparatus of the sperm. The most common defects in the sperm were the vacuolization and complete degeneration of the midpiece mitochondria and plasma membrane. The total LDH activity of caput and cauda epididymidis were within the range of control values. Sialic acid levels of the epididymis were not affected after the treatment. These results suggest a more proximal site of action of the drug than at the epididymal level.