Acta Veterinaria et Zootechnica Sinica ›› 2022, Vol. 53 ›› Issue (2): 459-469.doi: 10.11843/j.issn.0366-6964.2022.02.013

• ANIMAL BIOTECHNOLOGY AND REPRODUCTION • Previous Articles     Next Articles

Research on the Effect of Melatonin on the Growth and Function of Yak Luteal Cells

CHENG Huaqin1, YUAN Yujie1, LUO Wen1,3, GAO Shaoshuai1, YE Linxia1,3, LI Jian1,2*, YIN Shi1,2,3*   

  1. 1. College of Animal Science and Veterinary Medicine, Southwest Minzu University, Chengdu 610041, China;
    2. Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization of Ministry of Education, Southwest Minzu University, Chengdu 610041, China;
    3. Key Laboratory of Modern Biotechnology of State Ethnic Affairs Commission, Southwest Minzu University, Chengdu 610041, China
  • Received:2021-05-17 Online:2022-02-23 Published:2022-03-02

Abstract: This experiment was intended to research the effect of melatonin(MT)on the growth, antioxidant activity and function in yak luteal cells. The 2nd-passage luteal cells from healthy yak were used as research object in this experiment, and the effect of different concentrations (0 (Control), 25, 125, 250, and 500 pg·mL-1) of melatonin on the growth and function in yak luteal cells were compared. Cell proliferation and viability were evaluated by CCK-8 assay. qRT-PCR was conducted to analyse the mRNA expression levels of several genes, including proliferation-related gene PCNA, apoptosis-related genes BCL-2, BAX, FAS, antioxidant-related genes SOD1, SOD2, GPX1 and CAT, as well as progesterone synthesis-related genes HSD3β, STAR and CYP11A1. The levels of ROS and progesterone were determined by ELISA. The results showed that the supplementation of different concentrations of MT could promote luteal cells proliferation and accelerate them into the plateau phase. MT could promote the mRNA expression of cell-proliferated gene PCNA and anti-apoptosis-related gene BCL-2, and repress the expression of apoptosis-related genes BAX, FAS. MT could reduce the ROS level and promote progesterone secretion significantly in luteal cells, moreover, the above effects were most obvious when the MT concentration was 250 pg·mL-1. At this concentration, the mRNA expression levels of antioxidant-related genes SOD2, GPX1, CAT, and progesterone synthesis-related genes STAR and CYP11A1 significantly up-regulated. Compared with MT treatment alone, the co-treatment with MT and MT receptor inhibitor Luzindole could significantly increase the ROS level and decrease the expression level of SOD2, GPX1 and CAT. The level of progesterone and the expression of STAR and CYP11A1 decreased significantly. In conclusion, MT promotes yak luteal cells proliferation by up-regulating the mRNA expression level of PCNA and BCL-2, and repressing the expression level of BAX and FAS. MT may regulate the ROS level and progesterone level through its receptor. This study provides theoretical basis for the application of MT in the treatment of reproductive diseases caused by corpus luteum abnormality and the improvement in the reproductive performance of yak.

Key words: melatonin, yak, luteal cells, antioxidant activity, progesterone

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