Acta Veterinaria et Zootechnica Sinica ›› 2023, Vol. 54 ›› Issue (3): 1229-1239.doi: 10.11843/j.issn.0366-6964.2023.03.034

• BASIC VETERINARY MEDICINE • Previous Articles     Next Articles

Effect of Met-enkephalin on Lipopolysaccharide-stimulated Proliferation of Bovine Endometrial Stromal Cells

SUN Wenye1,2, LI Jianji1,2, WANG Heng1,2, DONG Junsheng1,2, LI Jun1,2, CUI Luying1,2*   

  1. 1. Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses/College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China;
    2. Joint International Research Laboratory of Agriculture and Agri-product Safety of the Ministry of Education, Yangzhou 225009, China
  • Received:2022-05-31 Online:2023-03-23 Published:2023-03-21

Abstract: To clarify the mechanism of Met-enkephalin (MENK) on the proliferation of bovine endometrial stromal cell (BESC), the BESC were co-treated with lipopolysaccharide (LPS), opioid receptor antagonists and MENK. The opioid receptor antagonists used in this study included the nonselective opioid receptor antagonist naloxone (Nx), the δ opioid receptor antagonist ICI 154129 were the μ opioid receptor antagonist CTAP, and the groups were as follows: the blank control group, the LPS treatment group, the LPS and MENK (10-10 mol·L-1) co-treatment group (LM group), the LPS, MENK and opioid receptor antagonists (Nx, CTAP and ICI 154129 were all 10-10 mol·L-1) co-treatment group and the LPS and opioid receptor antagonist co-treatment groups. Cell viability, cell cycle, the expression of cell proliferation-related genes and the expression of Wnt/β-catenin and PI3K/AK pathway proteins were detected. The results showed that the treatment of opioid receptor antagonist alone in treatment concentration or co-treatment of LPS for 24 h had no effect on cell viability (P>0.05). Compared with the LM group, the cell numbers of G1 phase increased (P<0.05) in the co-treatment groups of LPS, MENK and Nx (LMN) and LPS, MENK and ICI 154129 (LMI), the cell numbers of S phase decreased (P<0.05) in LMN group and the co-treatment group of LPS, MENK and CTAP (LMC). Compared with LM group, the gene expressions of CCN2, TGFB1 and TGFB3 decreased (P<0.01) in the groups of LMN and LMI; the CCN2 expression decreased (P<0.01) in LMC group. Compared with LM group, there were increases in the protein expressions of cyclinD1 and GSK-3β in LMN group (P<0.05), the β-catenin and GSK-3β in LMC group (P<0.01) , and the cyclinD1 in LMC group (P<0.05) . Compared with LM group, the phosphorylation level of AKT increased (P<0.05) in LMN, LMI, and LMC groups. In conclusion, both δ opioid receptor and μ opioid receptor are involved in the proliferation of MENK on BESC.

Key words: Met-enkephalin, bovine endometrial stromal cell, opioid receptors, opioid receptor antagonist, proliferation

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