Effects of serotonin inhibitor on the sperm parameters in old broiler breeder roosters after freeze-thaw

Serotonergic axis has an important role in reproductive process of breeder rooster flocks. The aim of this study was to evaluate semen quality parameters of Ross old broiler breeder roosters, which received serotonin inhibitor (PCPA). In this study, 16 Ross broiler breeder rooster assigned into four groups and received 0, 20, 40 and 80 ppm PAPA during 4 weeks. Then semen samples were collected and frozen. After freezing-thawing process, motion parameters, viability, membrane integrity, morphology, acrosome integrity, mitochondria activity, lipid peroxidation and DNA fragmentation were evaluated. In results, using 20 and 40 ppm PCPA improved total motility, progressive motility, membrane integrity, acrosome integrity, viability and decreased apoptosis rate in frozen-thawed semen samples. Using PCPA did not have any significant effect on morphology, mitochondria activity, lipid peroxidation and DNA fragmentation of semen samples. It seems to using 20 and 40 ppm PCPA could be a suitable method to improve Ross old broiler breeder rooster semen quality parameters after freezing-thawing process.