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Year 2013 - Volume 33, Number 9
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Cooling of the canine epididymis at 4°C and recovery of epididymal sperm using ACP-106c, 33(9):1155-1160
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ABSTRACT.- Mota Filho A.C., Silva H.V.R., Freitas L.A., Nunes T.G.P., Araújo A.A. & Silva L.D.M. 2013. [Cooling of the canine epididymis at 4°C and recovery of epididymal sperm using ACP-106c.] Refrigeração do epidídimo canino a 4°C e recuperação dos espermatozoides epididimários utilizando ACP-106c. Pesquisa Veterinária Brasileira 33(9):1155-1160. Laboratório de Reprodução de Carnívoros, Universidade Estadual do Ceará, Campus do Itaperi, Avenida Paranjana 1700, Fortaleza, CE 60740-903, Brazil. E-mail: acmfmedvet@hotmail.com
The study aimed to assess the quality of sperm recovered from the epididymal cauda after cooling the complex testis-epididymis (CTE) of dogs using ACP-106c extender. Sixty adult male dogs, weighing 10-20 kg were used. After euthanasia, CTE was removed and it was immersed in 0.9% saline and transported to the laboratory in cooler at 30°C. For cooling and recovery of epididymal spermatozoa, the 60 pairs of CTE were divided into four groups, according to the refrigeration time of the CTE and subsequent sperm recovery: G0h, G6h, G12h and G18h, wherein each pair of CTE remained zero, six, 12 or 18 hours at 4°C respectively. The recovery of sperm epididymal tail was conducted by flotation technique using ACP-106c or Tris extender. For each epididymis, it was added 1.0 mL of either extenders, preheated to 37°C for 5 minutes. They were then centrifuged at 800g/5 minutes to remove the cell debris. Morphology, functionality and total and progressive motility, and parameters obtained by CASA were evaluated. Data were analyzed by ANOVA followed by Turkey test (P <0.05). In all parameters assessed, there was no difference between the extenders used (P>0.05). The values of total motility groups G0h, G6H, G12H, and G18h for ACP-106c were 84.4±7.7, 81.6±11.6, 88.3±6.5 and 69.5±16.9 respectively, and for Tris 85.2±8.7, 77.4±14.3, 79.0±17.8 and 65.4±17.9 respectively. A decrease in sperm quality was observed after 18 hours of cooling in both extenders. Thus it can be concluded that the ACP-106c may be used to recover the epididymal spermatozoa chilled and may be viable for up to 12h cooling. |
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