Impact of adding different concentrations of IGF-I and insulin to the semen extender on bull sperm quality post-cryopreservation

ABSTRACT This study aimed to evaluate the addition of different concentrations of IGF-I and insulin to egg yolk-based extender to improve bovine semen cryopreservation. Two experiments were developed to evaluate the effects of the additives in two commercial extenders, Botubov® (Experiment 1) and Triladyl® (Experiment 2), both with the same design. Three ejaculates from four bulls (n = 12) were used. Each ejaculate was divided into seven equal fractions for dilution (60x106 spermatozoa/mL) in the following treatments: CON: extender only; IGF100: IGF-I 100ng/mL; IGF200: IGF-I 200ng/mL; INS150: insulin 150µUI/mL; INS200: insulin 200µUI/mL; ASS1: IGF-I 100ng/mL + insulin 150µUI/mL; ASS2: IGF-I 200ng/mL + insulin 200µUI/mL. Semen was cryopreserved by an automated system. Post-thawed sperm were evaluated regarding motility by CASA (Computer-assisted sperm analysis), and membranes by fluorescent probes (H342, PI, FITC-PSA and JC-1). For Botubov® extender, INS150 was more efficient in preserving total and progressive motility, VCL, BCF, plasma and mitochondrial membranes. A similar response was seen when insulin was added to the Triladyl® extender, INS150 was more efficient in preserving sperm motility, plasma membrane integrity and mitochondrial potential. Thus, the addition of insulin 150µUI/mL, regardless of the composition of the extender, contributes to better preserving bovine sperm from the cryopreservation effects

Avaliação histológica da próstata de cães adultos sexualmente intactos

Avaliou-se histologicamente a próstata de 30 cães adultos e idosos sexualmente intactos que apresentavam ou não sintomatologia clínica de doença prostática, e verificou-se a incidência de possíveis alterações da glândula. Dentre as alterações encontradas, a hiperplasia prostática benigna constituiu o diagnóstico mais comum, 85,6% (n=24), seguida por prostatite crônica, 64,3% (n=18), displasia do epitélio glandular, 42,8% (n=12), atrofia do epitélio glandular, 39,3% (n=11), infiltrado inflamatório focal, 25% (n=7), dilatação glandular focal, 21,4% (n=6), prostatite aguda, 7,1% (n=2), metaplasia escamosa, 3,6%, (n=1), metástase de neoplasia sistêmica, 3,6% (n=1) e abscesso prostático, 3,6% (n=1). Como em muitos casos os cães são assintomáticos, ressalta-se a importância da realização rotineira de exames clínicos específicos, como o toque retal e a ultrassonografia, para o diagnóstico precoce e o tratamento das afecções prostáticas.The prostates of 30 not castrated old dogs with or without clinical symptoms of prostatic disease were histologically evaluated. It was observed the incidence of possible changes in the gland. Among the changes, benign prostatic hyperplasia (BPH) was the most common diagnosis, accounting for 85.6% (n=24), followed by chronic prostatitis, 64.3% (n=18), dysplasia of the glandular epithelium, 42.8% (n=12), atrophy of the glandular epithelium, 39.3% (n=11), focal inflammatory infiltrate, 25% (n=7), focal glandular dilation, 21.4% (n=6), acute prostatitis, 7.1% (n=2), squamous metaplasia, 3.6% (n=1), metastasis of systemic neoplasia, 3.6% (n=1), and prostatic abscess, 3.6% (n=1). Because the lack of symptoms in most of dogs with prostatic changes, the specific clinic exams in routine, as rectal palpation and ultrasonography, are very important to early diagnosis and treatment of dogs with prostatic disease