title: Effect of cysteine and glutamine added to extender on post-thaw sperm functional parameters of buffalo bull.
abstract: Amino acids seem to be crucial components for semen freezing extender due to antioxidant properties. Therefore, this study aimed to assess motility parameters, membrane integrity, intracellular reactive oxygen species (ROS), mitochondrial membrane potential (MMP) and DNA damage to detect the optimum concentrations of cysteine and glutamine for buffalo semen cryopreservation. Twenty ejaculates of four buffalo bulls were diluted in tris-egg yolk extender and divided into seven equal groups consisting of cysteine (5, 7.5 and 10 mmol), glutamine (10, 15 and 20 mmol) and no additive. Supplementation of 5 and 7.5 mmol cysteine and 15 mmol glutamine in cryopreservation extender significantly increased post-thaw motility and plasma membrane integrity of spermatozoa with significant reduction in intracellular ROS when compared with control groups (P < 0.05). Cysteine at 7.5 mmol concentration elevated progressive motility and MMP, compared with control (P < 0.05). No significant differences were observed for motion patterns and DNA damage of frozen-thawed buffalo spermatozoa in extender containing amino acids. The findings of this study showed that supplementation of 7.5 mmol cysteine and 15 mmol glutamine in semen cryopreservation extender has more potential to decrease intracellular ROS, and subsequently elevate motility and membrane integrity of buffalo frozen-thawed spermatozoa.
authors: Department of Embryology at Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran.
authors: T R
authors: TR
authors: Topraggaleh
authors: A
authors: A
authors: Shahverdi
authors: A
authors: A
authors: Rastegarnia
authors: B
authors: B
authors: Ebrahimi
authors: V
authors: V
authors: Shafiepour
authors: M
authors: M
authors: Sharbatoghli
authors: V
authors: V
authors: Esmaeili
authors: E
authors: E
authors: Janzamin
mesh_terms: D000818:Animals; D002417:Cattle; D003545:Cysteine / Q000737:chemistry*; D004249:DNA Damage; D005973:Glutamine / Q000737:chemistry*; D008297:Male; D053078:Membrane Potential, Mitochondrial; D013094:Spermatozoa / Q000502:physiology*
chemical_list: D005973:Glutamine; D003545:Cysteine
keywords: Buffalo; cryopreservation; cysteine; glutamine; sperm parameters