China Animal Husbandry & Veterinary Medicine ›› 2025, Vol. 52 ›› Issue (8): 3907-3917.doi: 10.16431/j.cnki.1671-7236.2025.08.039

• Basic Veterinary Medicine • Previous Articles    

Regulation of Phagocytic and Adhesion Functions of Mononuclear Macrophages by SOCE in Subclinical Hypocalcemia Dairy Cows

LI Siyao1, JI Ziwei1, LI Lei1, ZHANG Jingqi1, YUE Baichen1, YIN Yufeng1, XU Chuang2, YANG Wei3, ZHANG Bingbing1   

  1. 1. College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, China;
    2. College of Veterinary Medicine, China Agricultural University, Beijing 100193, China;
    3. College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing 163319, China
  • Received:2024-12-20 Published:2025-08-02

Abstract: 【Objective】 The purpose of this experiment was to explore the effect of store operated Ca2+ entry (SOCE) on the phagocytic and adhesion functions of mononuclear macrophages in dairy cows. 【Method】 Peripheral blood of healthy (control,Con)and subclinical hypocalcemia dairy cows (hypocalcemia,Hyp) was collected,and CD14 mononuclear macrophages in the blood were isolated and cultured in vitro using magnetic beads.The mononuclear macrophages of subclinical hypocalcemia dairy cows were divided into three groups: Hyp, thapsigarsin (TG) treatment group (Hyp+TG) and 2-aminoethyl diphenylborinate (2-APB) treatment group (Hyp+2-APB).The intracellular Ca2+ level was detected by flow cytometry.Real-time quantitative PCR and Western blotting were used to detect the mRNA and protein expression of SOCE-related factors.The phagocytosis and adhesion of mononuclear macrophages were detected by laser confocal and immunofluorescence,and the expression of phagocytosis and adhesion factors of mononuclear macrophages was detected. 【Result】 Flow cytometry analysis showed that,compared with Con group,the intracellular Ca2+ level of mononuclear macrophages in Hyp group was extremely significantly decreased (P<0.01).Real-time quantitative PCR results showed that,compared with Con group,the expression of calcium release-activated calcium modulator 1 (ORAI1),stromal interaction molecule 1 (STIM1),STIM2 and selectin L (SELL) genes of mononuclear macrophages in Hyp group were extremely significantly decreased (P<0.01),expression of ORAI2,ORAI3 and myeloperoxidase (MPO) genes were significantly decreased (P<0.05).Western blotting results showed that,compared with Con group,the expression of ORAI2,ORAI3,STIM2,ORAI1 and STIM1 proteins of mononuclear macrophages in Hyp group were extremely significant or significantly decreased (P<0.01 or P<0.05).Meanwhile,compared with Con group,the phagocytic and adhesion abilities of mononuclear macrophages in Hyp group were significantly or extremely significantly decreased (P<0.05 or P<0.01).After TG treatment,compared with Hyp group,the expression of ORAI1,ORAI2,MPO,ORAI3,STIM1,STIM2 and SELL genes in mononuclear macrophages of subclinical hypocalcemia dairy cows were significantly or extremely significantly increased (P<0.05 or P<0.01),the expression of ORAI1,ORAI3,STIM1,STIM2 and ORAI2 proteins were significantly or extremely significantly upregulated (P<0.05 or P<0.01).The phagocytic and adhesion abilities of cells were significantly or extremely significantly enhanced (P<0.05 or P<0.01).After 2-APB treatment,compared with Hyp group,the expression of ORAI1,ORAI2,MPO,ORAI3,STIM1,STIM2 and SELL genes in mononuclear macrophages of subclinical hypocalcemia dairy cows were significantly or extremely significantly decreased (P<0.05 or P<0.01),the expression of ORAI2,STIM2,ORAI1,ORAI3 and STIM1 proteins were significantly or extremely significantly decreased (P<0.05 or P<0.01).The phagocytic and adhesion abilities of cells were extremely significant or significantly weakened (P<0.01 or P<0.05). 【Conclusion】 After SOCE was activated by TG,the Ca2+ level in mononuclear macrophages of subclinical hypocalcemia dairy cows increased,and the phagocytic and adhesion abilities enhanced.After SOCE was inhibited by 2-APB,the intracellular Ca2+ level in mononuclear macrophages of subclinical hypocalcemia dairy cows decreased,and the phagocytic and adhesion functions weakened,which indicated that SOCE was involved in regulating the phagocytosis and adhesion of mononuclear macrophages.

Key words: store operated Ca2+ entry (SOCE); mononuclear macrophage; phagocytic; adhesion

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