Influencia da elevação da temperatura testicular sobre o complexo DNA-proteina e outras caracteristicas de espermatozoides de coelho (Oryctolagus cuniculus)

AUTOR(ES)
DATA DE PUBLICAÇÃO

1998

RESUMO

The effect of increase in testis temperature on spermatozoal DNA-protein complexes and other characteristics was studied in rabbits subjected to three days of experimental cryptorchidism and accompanied along several periods, after ceased the stress. A decrease in strength, motility and concentration as well as an increase in head and tail pathologies and DNA-protein anomalies revealed by "induced metachromasy" and Feulgen reaction were observed in the sperm cells. Individual variation in these parameters as an answer to treatment was observed. This was also found to occur in controls, though with a much lower intensity. Light and transmission electron microscopy of the testis and epididymis of part of the experimentals indicated an intense testicular degeneration, though reversible. Apparently the "zonula occludens" of the Sertoli cells and the basal compartment of the seminiferous tubules were not affected. After 61 days ceased the cryptorchidism the seminal parameters, with the exception of the spermatic concentration, returned to normal values. The increase in DNA-protein anomalies with cryptorchidism occurred relatively late and was not very intense once ceased the stress. However it has reached a value up to 20 times the normal values in one isolated case

ASSUNTO(S)

coelho espermatozoides proteina

ACESSO AO ARTIGO

Documentos Relacionados