China Animal Husbandry and Veterinary Medicine ›› 2020, Vol. 47 ›› Issue (8): 2544-2552.doi: 10.16431/j.cnki.1671-7236.2020.08.023

• Genetics and Breeding • Previous Articles     Next Articles

Effects of ROS on Expression of SUMO-1 and Quality of Porcine Oocytes

XU Da1,2, LUO Xiaotong1, CHEN Xuan1, LYU Yanqiu1, JIN Yi1   

  1. 1. Agricultural College, Yanbian University, Yanji 133002, China;
    2. Jilin Academy of Agricultural Sciences, Jilin 132001, China
  • Received:2020-03-24 Online:2020-08-20 Published:2020-08-15

Abstract: The purpose of this study was to investigate the effects of reactive hydrogen peroxide (H2O2) on the expression of the protein ubiquitin SUMO-1 and the ability of sperm-oocyte binding of porcine oocyte during in vitro maturation (IVM).The test was divided into 5 groups:0 (control),10,50,75 and 100 μg/mL of H2O2 treatment group.Western blotting,flow cytometry,Real-time quantiative PCR,Hoechst staining and other methods were used to detect porcine oocyte in vitro maturation,content of protein SUMOylation SUMO-1,cell viability,expression of apoptotic gene mRNA,solubility of zona pellucida (ZP) and sperm-oocyte binding.The results showed that 75 μg/mL H2O2 group compared with the control,10 and 50 μg/mL H2O2 groups,the in vitro maturation rate and cell viability of oocytes decreased significantly,while 75 μg/mL H2O2 group compared with other H2O2 groups,the ZP lysis time prolonged significantly,and the number of sperm adhering to the ZP of mature oocytes was reduced (P<0.05).SUMO-1 protein markers appeared at 77 and 18 ku,and the content of SUMO-1 protein was significantly reduced in 75 μg/mL H2O2 group when compare with the control,10 and 50 μg/mL H2O2 groups (P<0.05).75 μg/mL H2O2 group compared with the control,10 and 50 μg/mL H2O2 groups,Bcl-2 gene was significantly down-regulated (P<0.05),while 50 μg/mL H2O2 significantly up-regulated Bax gene level when compared with the control and 10 μg/mL H2O2 groups (P<0.05).In summary,H2O2 could regulate the SUMOylation level and sperm-oocyte binding ability of porcine oocytes during in vitro maturation.

Key words: reactive oxygen species (ROS); hydrogen peroxide (H2O2); oocyte; SUMOylation; cell viability; porcine

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