China Animal Husbandry and Veterinary Medicine ›› 2021, Vol. 48 ›› Issue (6): 2169-2176.doi: 10.16431/j.cnki.1671-7236.2021.06.030

• Preventive Veterinary Medicine • Previous Articles     Next Articles

Effect of PGD2/DP1 Pathway on Expression of HMGB-1 and PAFR in Endometrial Tissue of Cows Infected with Bacteria

YANG Xiaolin1,2, HAN Runlin1, MAO Wei1,2, BAO Haixia1,2, LIU Kun1,2, WU Jindi1,2, CAO Jinshan1,2, LIU Bo1,2   

  1. 1. College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot 010018, China;
    2. Key Laboratory of Animal Disease Clinical Diagnosis, Ministry of Agriculture, Hohhot 010018, China
  • Received:2021-01-06 Online:2021-06-20 Published:2021-06-18

Abstract: The aim of this study was to investigate the effects of PGD2/DP1 receptor pathway on the expression of inflammatory mediators HMGB-1 and PAFR,and the degree of tissue injury in the endometrium of dairy cows infected with Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus).The endometrial tissues of cows were treated with 1×10-6 mol/L DP1 receptor agonists (BW-245C and 15d-PGJ2) and infected with E. coli and S. aureus at a concentration of 1×106 CFU/mL.The expression of HMGB-1 and PAFR was detected by Real-time quantitative PCR,immunohistochemistry,and the tissue injury was evaluated by HE staining.The results showed that the expression of HMGB-1 and PAFR of endometrium tissue in dairy cows was significantly higher than that in blank control group after E. coli and S. aureus infection at a concentration of 1×106 CFU/mL (P<0.05),while the expression of HMGB-1 and PAFR in bovine endometrium was significantly inhibited by DP1 receptor agonists (P<0.05).HE staining showed that the endometrial epithelial cells and glandular epithelial cells was completely exfoliated,necrotic and disintegrated after E.coli and S.aureus infection.While the DP1 receptor agonists treated bovine endometrium,it significantly reduced the degree of injury of bovine endometrium (P<0.05).The results of immunohistochemical staining were consistent with those of the above two methods.The results showed that PGD2 could inhibit the expression of HMGB-1 and PAFR and reduce the degree of tissue damage in the bovine endometrium infected with E.coli and S. aureus,which might be mediated by DP1 receptor.

Key words: bovine endometrial tissues; E.coli; S.aureus; inflammation; HMGB-1; PAFR

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