China Animal Husbandry and Veterinary Medicine ›› 2021, Vol. 48 ›› Issue (10): 3708-3714.doi: 10.16431/j.cnki.1671-7236.2021.10.022

• Genetics and Breeding • Previous Articles     Next Articles

Effects of Tannin Acid on the in vitro Maturation and Embryonic Development of Porcine Oocytes

SUN Jingtao1, JIANG Chaoqian1,2, LIU Jiahui1,2, ZHANG Chi1, WANG Chuanyue1, BIAN Ya1, JIANG Xiqing1,2, ZHANG Qi1,2, JIN Junxue1,2   

  1. 1. College of Life Science, Northeast Agricultural University, Harbin 150030, China;
    2. Key Laboratory of Animal Cellular and Genetics Engineering of Heilongjiang Province, Harbin 150030, China
  • Revised:2021-04-27 Online:2021-10-20 Published:2021-09-30

Abstract: The aim of this study was to investigate the effect of tannin acid on porcine in vitro maturation (IVM) and their subsequent embryonic development. Thus, the porcine cumulus-oocyte complexes were supplemented with different concentration (0, 1, 10 and 100 μg/mL) of tannin acid during 42 h IVM, and then cumulus cells expansion, oocyte maturation rate, and the level of glutathione (GSH), reactive oxygen species (ROS) and growth differentiation factor 9 (GDF9) in oocytes were evaluated. Moreover, parthenogenetic activation (PA) and in vitro fertilization (IVF) were carried out, and cleavage rate, blastocyst formation rate and total cell number of blastocyst were evaluated. The results showed that when compared with the control group, 10 μg/mL tannin acid significantly increased the cumulus expansion index and 100 μg/mL tannin acid significantly decreased it (P<0.05). There was no significant difference in oocyte maturation rate between control, 1 and 10 μg/mL tannin acid groups (P>0.05), while 100 μg/mL tannin acid significantly decreased maturation rate (P<0.05). Moreover, the levels of GSH and GDF9 were dramatically enhanced (P<0.05), and the level of ROS was dramatically reduced by 1 and 10 μg/mL tannin acid supplementation (P<0.05). The results of development ability of parthenogenetic embryos and in vitro fertilization embryos showed that there was no significant difference in cleavage rate between tannic acid groups and control group (P>0.05). The blastocyst rate of parthenogenetic embryos and in vitro fertilization embryos in 10 μg/mL tannic acid group were significantly increased (P<0.05). The number of blastocyst cells in parthenogenetic embryos and in vitro fertilization embryos in 100 μg/mL tannic acid group was significantly lower than that in other groups (P<0.05). Taken together, 10 μg/mL tannin acid improved oocyte quality and the subsequent embryo developmental competence by increasing cumulus cells expansion and the GSH and GDF9 levels, and reducing the ROS level of the porcine oocyte.

Key words: tannin acid; pig; cumulus cell; oocyte; embryo development

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