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Arq. bras. med. vet. zootec ; 61(1): 42-49, fev. 2009. graf
Article in Portuguese | LILACS | ID: lil-513022

ABSTRACT

Três garanhões foram utilizados para estudar o efeito da adição de trolox e pentoxifilina na motilidade, integridade do acrossoma e DNA de espermatozoides pós-descongelação. Para congelação, utilizou-se Tris-gema com glicerol (5 por cento) em máquina de congelação de sêmen. As amostras foram descongeladas a 37ºC durante 30 segundos e tratadas com: T1= 150µL de sêmen + 150µL de Tris; T2= 150µL de sêmen + 150µL de Tris + 120µM/mL de trolox; T3= 150µL de sêmen + 150µL de Tris + 3,5mM de pentoxifilina e T4= 150µL de sêmen + 150µL de Tris + 3,5mM de pentoxifilina + 120µM/mL de trolox. Após 0, 60 e 120 minutos de incubação (37ºC), as amostras foram analisadas quanto à motilidade, vigor, integridade de acrossoma e DNA. Não houve diferença (P>0,05) entre tratamentos após 0 e 60 minutos de incubação em todos os parâmetros estudados. Após 120 minutos de incubação, verificou-se maior porcentual (P<0,05) de células com motilidade total e progressiva nas amostras do T2. Conclui-se que a adição de trolox após descongelação do sêmen equino preserva a motilidade total e progressiva dos espermatozoides submetidos à incubação a 37ºC durante 120 minutos.


Three stallions were used to study the effect of trolox and pentoxifylline addition on the motility and integrity of acrossome and DNA equine spermatozoa after thawing. Tris-egg-yolg diluent with glycerol (5 percent) were used to freeze the semen samples in a freezing machine. The samples were thawed at 37ºC during 30 seconds and treated with: T1=150µL of semen + 150µL of Tris; T2= 150µL of semen + 150µL of Tris +150mM/mL of trolox; T3= 150µL of semen + 150µL Tris +3.5mM of pentoxifylline; and T4= 150µL of semen + 150µL of Tris + 3.5mM of pentoxifylline + 150mM of trolox. After 0, 60, and 120 minutes of incubation (37ºC), the samples were analyzed to motility, vigor, and integrity of acrossome and DNA. There was no difference (P>0.05) among treatments considering 0 and 60 minutes of incubation in all studied parameters. After 120 minutes of incubation, it was observed higher percentage (P<0.05) of cells with total and progressive motility in the samples of T2. It can be concluded that the trolox addition after thawing of equine semen preserved total and progressive motility of the sperm incubated at 37ºC during 120 minutes.


Subject(s)
Animals , Acrosome Reaction , Cryopreservation , Equidae , Pentoxifylline/adverse effects , Sperm Motility , Spermatozoa
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