Abstract
Egg yolk is routinely used in most of the extenders for cryopreservation of semen, but mechanisms of protection of spermatozoa by egg yolk are not very clear. Investigations with buffalo cauda epididymal sperm have shown that seminal plasma heparin binding proteins have detrimental effects during semen cryopreservation. The present study was conducted to investigate the effect of egg yolk on the detrimental effects of heparin binding proteins during cryopreservation of buffalo cauda epididymal spermatozoa. The results indicated that egg yolk was able to reduce the heparin binding proteins mediated cryoinjury in spermatozoa. One of the mechanisms of protection of spermatozoa from cryoinjury by egg yolk may be due to the inhibition of deleterious actions of heparin binding proteins on the spermatozoa.
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