Taurine reduction of injury from neutrophil infiltration ameliorates Streptococcus uberis-induced mastitis

文献类型： 外文期刊

第一作者： Li, Ming

作者： Li, Ming;Wang, Zhenglei;Fu, Shaodong;Sun, Naiyan;Xu, Yuanyuan;Miao, Jinfeng;Li, Ming;Li, Weizhen;Han, Xiangan;Zhang, Jinqiu

作者机构：

关键词： Taurine; Streptococcus uberis; Mastitis; Blood-milk barrier; TAK1/MAPK/NF-kappa B; AMPK/Nrf2

期刊名称：INTERNATIONAL IMMUNOPHARMACOLOGY （ 影响因子：5.6； 五年影响因子：5.6 ）

ISSN： 1567-5769

年卷期： 2023 年 124 卷

页码：

收录情况： SCI

摘要： Mastitis is a common disease of dairy cows characterized by infiltration of leukocytes, especially neutrophils, resulting in increased permeability of the blood-milk barrier (BMB). Taurine, a functional nutrient, has been shown to have anti-inflammatory and antioxidant effects. Here, we investigated the regulatory effects and mechanisms of taurine on the complex immune network of the mammary gland in Streptococcus uberis (S. uberis) infection. We found that taurine had no direct effect on CXCL2-mediated neutrophil chemotaxis. However, it inhibited MAPK and NF-kappa B signalings by modulating the activity of TAK1 downstream of TLR2, thereby reducing CXCL2 expression in macrophages to reduce neutrophil recruitment in S. uberis infection. Further, the AMPK/ Nrf2 signaling pathway was activated by taurine to help mitigate oxidative damage, apoptosis and disruption of tight junctions in mammary epithelial cells caused by hypochlorous acid, a strong oxidant produced by neutrophils, thus protecting the integrity of the mammary epithelial barrier. Taurine protects the BMB from damage caused by neutrophils via blocking the macrophage-CXCL2-neutrophil signaling axis and increasing the antioxidant capacity of mammary epithelial cells.

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