title: Apoptotic-like changes of boar spermatozoa in freezing media supplemented with different antioxidants.
abstract: This study evaluated the effect of supplementing the freezing extender with exogenous anti-oxidants on apoptotic-like changes in post-thaw boar spermatozoa. A total of 36 ejaculates were resuspended in standard lactose-egg yolk-glycerol extender supplemented with antioxidant to final concentrations of 0 (as control), 2.5mM GSH (group I), 5.0 mM GSH (group II), 150 IU/mL SOD (group III), 300 IU/mL SOD (group IV), 200 IU/mL CAT (group V), 400 IU/mL CAT (group VI), 150 IU/mL SOD+200 IU/mL CAT (group VII), 300 IU/mL SOD+400 IU/mL CAT (group VIII). Sperm motility and apoptotic-like changes were determined before and after freeze-thawing. The various markers of apoptotic-like changes were measured: plasma membrane permeability by YO-PRO-1/PI assay, phosphatidylserine (PS) translocation across the plasma membrane using fluorescein-labeled Annexin-V, mitochondrial transmembrane potential detected by JC-1, and DNA fragmentation evaluated by TUNEL assay. The highest percentage of progressive motile sperm was noticed in group II (PM% 64.2±15.4) compared with control (PM% 36.8±5.5). The supplementation of 400 IU/mL CAT (group VI) revealed significant (P<0.01) reduction of apoptotic-like changes (YO-PRO-1+/PI-: 13.1±7.5%, AnV+/PI-: 9.9±4.1%) in frozen-thawed spermatozoa compared with extender supplemented with 200 IU/mL CAT (group V). Irrespective of the concentration used, SOD and CAT in combination (group VII and group VIII) significantly (P<0.01) improved post-thaw sperm survival compared with the control. Evaluation by TUNEL assay revealed that cryopreservation and thawing did not induce DNA fragmentation in boar spermatozoa.
authors.forename: M
authors.initials: M
authors.lastname: Trzcińska
authors.forename: M
authors.initials: M
authors.lastname: Bryła
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000009:adverse effects*; D017209:Apoptosis / Q000187:drug effects*; D015925:Cryopreservation / Q000662:veterinary*; D003451:Cryoprotective Agents / Q000009:adverse effects; D003470:Culture Media; D008297:Male; D012662:Semen Preservation / Q000662:veterinary*; D013094:Spermatozoa / Q000187:drug effects*; D013552:Swine
chemical_list: D000975:Antioxidants; D003451:Cryoprotective Agents; D003470:Culture Media