title: Antioxidant effects of clove bud (Syzygium aromaticum) extract used with different extenders on ram spermatozoa during cryopreservation.
abstract: Clove bud (Syzygium aromaticum) extract was added at concentrations of 0, 35, 75, and 115 μg/ml to ovine semen extenders in order to investigate the antioxidant activities of clove bud extract and its effects on semen quality parameters after cryopreservation of ram spermatozoa. The basic extender was composed of Tris, egg yolk, and glycerol. Two other extenders were prepared by substitution of egg yolk with either LDL or egg yolk+SDS. The DPPH inhibition test was employed to assess the antioxidant activity of clove bud extract. Results showed that, compared to vitamin E, clove bud extract had a higher antioxidant activity. Better sperm motility and movement characteristics (P<0.05) were observed in the semen diluted with medium containing egg yolk+SDS than in that containing egg yolk and LDL. Progressive motility and movement characteristics of the sperm were significantly improved (P<0.05) by adding 35 and/or 75 μg/ml of clove bud extract to semen extenders. Sperm viability and plasma membrane integrity were also higher (P<0.05) in the semen exposed to medium containing egg yolk+SDS and 75 μg of clove buds extract after cryopreservation processes. Higher levels of clove bud extract, however, had adverse effects on all the sperm quality parameters and significantly reduced (P<0.05) the motility, movement parameters, viability, and plasma membrane integrity of ovine sperm. It was concluded that the clove bud extract had an antioxidant potential that makes it useful for addition to semen extenders and that the best results are obtained with a maximum clove bud extract of 75 μg/ml. Moreover, the combination of egg yolk and a detergent was found to improve sperm quality after the cooling and freeze-thawing processes.
authors.affiliation: Animal Science Department, College of Agriculture, Isfahan University of Technology, P.O.Box: 84156/83111, Isfahan, Iran.
authors.forename: H
authors.initials: H
authors.lastname: Baghshahi
authors.affiliation: Animal Science Department, College of Agriculture, Isfahan University of Technology, P.O.Box: 84156/83111, Isfahan, Iran. Electronic address: ariasi@cc.iut.ac.ir.
authors.forename: A
authors.initials: A
authors.lastname: Riasi
authors.affiliation: Animal Science Department, College of Agriculture, Isfahan University of Technology, P.O.Box: 84156/83111, Isfahan, Iran.
authors.forename: A H
authors.initials: AH
authors.lastname: Mahdavi
authors.affiliation: Department of Reproductive Biotechnology, Reproductive Biotechnology Research Center, Avicenna Research Institute ACECR, Shahid Beheshti University, Tehran, Iran; Research Institute of Animal Embryo Technology, Shahrekord University, Shahrekord, Iran.
authors.forename: A
authors.initials: A
authors.lastname: Shirazi
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000737:chemistry / Q000378:metabolism*; D001713:Biphenyl Compounds / Q000378:metabolism; D015925:Cryopreservation / Q000379:methods / Q000662:veterinary*; D003451:Cryoprotective Agents / Q000737:chemistry / Q000378:metabolism; D003902:Detergents / Q000378:metabolism; D004530:Egg Yolk / Q000378:metabolism; D008077:Lipoproteins, LDL / Q000378:metabolism; D008297:Male; D010851:Picrates / Q000378:metabolism; D010936:Plant Extracts / Q000737:chemistry / Q000378:metabolism*; D055101:Semen Analysis; D012662:Semen Preservation / Q000379:methods / Q000662:veterinary*; D012756:Sheep / Q000502:physiology*; D012967:Sodium Dodecyl Sulfate / Q000378:metabolism; D013081:Sperm Motility / Q000187:drug effects; D013094:Spermatozoa / Q000166:cytology* / Q000187:drug effects / Q000378:metabolism; D027842:Syzygium / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D003451:Cryoprotective Agents; D003902:Detergents; D008077:Lipoproteins, LDL; D010851:Picrates; D010936:Plant Extracts; D012967:Sodium Dodecyl Sulfate; C004931:1,1-diphenyl-2-picrylhydrazyl
keywords: Antioxidant; Clove bud; Cryopreservation; Detergent; LDL; Ram; Semen