ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2018, Vol. 49 ›› Issue (10): 2154-2162.doi: 10.11843/j.issn.0366-6964.2018.10.011

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Effects of Epigallocatechin-3-gallate on Bovine Frozen Semen Quality and Subsequent Fertilization Ability

HUANG Zi-qiang1,2, WANG Ling-ling1,2,3, PANG Yun-wei1,2, HAO Hai-sheng1,2, DU Wei-hua1,2, ZHAO Xue-ming1,2, LIU Yan1,2, ZHU Hua-bin1,2*   

  1. 1. Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
    2. Center of Domestic Animal Reproduction and Breeding, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
    3. Shandong OX Livestock Breeding Co., Ltd, Jinan 250100, China
  • Received:2018-01-22 Online:2018-10-23 Published:2018-10-23

Abstract:

The present study aimed to investigate the effects of epigallocatechin-3-gallate (EGCG) on bovine frozen-thawed semen quality and subsequent fertilization ability. The frozen-thawed semen were incubated with different concentrations of EGCG(0, 5, 10 and 20 μmol·L-1) at 38.5℃ for 1 h. Kinetic parameters, structural integrity, activities of related enzymes and subsequent fertilization ability were measured. The results revealed that supplementation with 10 μmol·L-1 EGCG significantly improved the percentage of total motile sperms(TM,%) and the beat cross frequency (BCF, Hz, P<0.05). The percentages of spermatozoa with intact plasma membrane and acrosome were significantly higher in 5, 10 and 20 μmol·L-1 EGCG treated groups compared with the control group(P<0.05). 5 and 10 μmol·L-1 EGCG led to higher mitochondrial membrane integrity(P<0.05). The activities of SOD and CAT in spermatozoa treated with 10 and 20 μmol·L-1 EGCG were significantly increased, while the LDH activity and MDA level were markedly decreased in 10 μmol·L-1 EGCG group(P<0.05). The cleavage and blastocyst development rates of in vitro-produced bovine embryos originating from 10 and 20 μmol·L-1 EGCG-treated spermatozoa were significantly higher than for embryos from other groups(P<0.05). In summary, 10 μmol·L-1 EGCG can enhance the quality and subsequent fertilization ability of bovine frozen-thawed semen.

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