This study investigated how the inhibition of certain enzymes present in ide sperm influences sperm motility and the percentage of fertilised eggs. The enzymes studied were acid phosphatase (AcP), β-N-acetylglucosaminidase (β-NAGase) and lactate dehydrogenase (LDH). None of the inhibitors affected ide sperm motility parameters. The addition of gossypol (a LDH inhibitor) caused a considerable increase in the percentage of fertilised eggs (92-95% compared to 63% in the control). The inhibition of AcP caused a considerable decrease in fertility rate - at the highest inhibitor dose, the percentage of fertilised eggs decreased to 26%. A similar effect was seen after the addition of acetamide (a β-NAGase inhibitor), but in this case the highest dose caused complete inhibition of fertilisation. The results presented here indicate the importance of AcP and β-NAGase in the process of ide fertilisation.
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