China Animal Husbandry and Veterinary Medicine ›› 2024, Vol. 51 ›› Issue (2): 462-469.doi: 10.16431/j.cnki.1671-7236.2024.02.003

• Biotechnology • Previous Articles     Next Articles

Effect of Leukemia Inhibitory Factor on Developmental Capacity of Bovine Oocyte

MO Xianhong1,4, TAO Qinghua2, FANG Yi3, LIANG Jing1, ZHANG Jiayin1, LIANG Xiaohang1, XU Zhenjun1   

  1. 1. College of Chemistry and Life Science, Chifeng University, Chifeng 024000, China;
    2. College of Animal Science (College of Bee Science), Fujian Agriculture and Forestry University, Fuzhou 350002, China;
    3. Jilin Provincial Key Laboratory of Grassland Farming, Northeast Institute of Geography and Agoecology, Chinese Academy of Sciences, Changchun 130062, China;
    4. Inner Mongolia Saikexing Institute of Breeding and Reproductive Biotechnology in Domestic Animal, Hohhot 011517, China
  • Received:2023-10-07 Online:2024-02-05 Published:2024-01-29
  • Contact: 内蒙古自治区自然科学基金(2022LHMS03010);内蒙古自治区高等学校科学研究项目(NJZY22130);赤峰学院大学生创新创业训练计划项目(S202310138024);赤峰学院一流学科建设项目(CFXYYLXKB202102);蒙东地区生物资源开发利用创新团队(cfxykycxtd202008) E-mail:linkur3@126.com
  • Supported by:
    The project was supported by the National Key Research and Development Program of China (2019YFC1905301);National Natural Science Foundation of China (22078115,21776108,21690083,22008078).

Abstract: 【Objective】 This experiment was to explore the effect of leukemia inhibitory factor (LIF) on the development ability of bovine oocytes and early embryo and the expression of multipotent genes.【Method】 The cumulus-oocyte-complexes (COCs) of bovine were divided into 4 groups.In the control group, no LIF solution was added during in vitro maturation (IVM) and embryo in vitro culture (IVC).In treatment group 1 (T1 group), 25 ng/mL LIF was added to the IVM process and no LIF was added to the IVC process.In treatment group 2 (T2 group), the IVM process did not add LIF, and the IVC process added 25 ng/mL LIF.In treatment group 3 (T3 group), 25 ng/mL LIF was added to the whole process of IVM and IVC.The concentration of intracellular free calcium ([Ca2+]i) in oocytes was detected by Fluo-3 fluorescence indicator.Oocytes with the first polar body were selected for parthenogenetic activation, and the cleavage rate and blastocyst rate of each group were calculated.Real-time quantitative PCR was used to detect the relative expression of multipotent genes.【Result】 Compared with the control group, intracellular [Ca2+]i concentration of bovine oocytes in T1 group was extremely significantly decreased after 8 h of cultivation (P<0.01).After 24 h of cultivation, the intracellular [Ca2+]i concentration of bovine oocytes in T1 group was extremely significantly increased (P<0.01).The cleavage rate and blastocyst rate in T1 and T3 groups were significantly higher than those in control group, and the blastocyst rate in T3 group was significantly higher than that in T1 and T2 groups (P<0.05).The results of Real-time quantitative PCR showed that the expression levels of POU5F1 and NANOG genes in T3 group were significantly higher than those in control group, and the expression level of CDX2 gene was significantly lower than that in control group (P<0.05).【Conclusion】 The addition of LIF during IVM could improve the developmental ability of oocytes, and the addition of LIF during the whole process of IVM+IVC had a positive effect on early embryonic development and the expression of multipotent genes.

Key words: leukemia inhibitory factor; multipotent gene; calcium ions; embryonic development

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