Efeitos da somatotropina recombinante bovina sobre as características espermáticas, concentrações de testosterona e IGF1 no plasma seminal de touros (Bos taurus taurus) submetidos à degeneração testicular / Recombinant bovine somatotropin effects on testosterone and IGF1 levels of bulls (Bos taurus taurus) under testicular degeneration

AUTOR(ES)
DATA DE PUBLICAÇÃO

2004

RESUMO

Testicular heat degeneration is the most common cause of poor fertility of Bos taurus bulls in the tropics. The Growth Hormone has been studied in man infertility treatment with some progress. A randomly blocks experimental design used 16 mature bulls allotted in 4 treatments in a 2x2 factorial arrangement (0 e 96 hours of scrotal insulation, 0 e 1,2 mg bST/kg BW) was performed to asses the effects ob bulls submitted to scrotal insulation. Motility, abnormal acrosome, tail and head defects, proximal droplet, and abnormal sperm increased, and seminal plasma Testosterone was temporally increased in response to scrotal insulation. Distal droplet, midpiece and seminal plasma IGF1 were not affected by bST. The bST did not affect sperm characteristics or seminal Testosterone and IGF1.

ASSUNTO(S)

degeneração testicular somatotropina testosterone semen testicular degeneration insulin-like growth factor somatotropin testosterona sêmen insulin-like growth factor

ACESSO AO ARTIGO

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