Staphylococcus aureus promotes its intracellular survival by inhibiting Rab11-Rab11FIP4-mediated vesicle trafficking

文献类型： 外文期刊

第一作者： Xu, Huiling

作者： Xu, Huiling;Wang, Xiaozhou;Zhang, Zhizhong;Hu, Jiaqing;Liu, Yongxia;Liu, Jianzhu;Liu, Yongxia;Yu, Yongtao;Wang, Jiandong

作者机构：

关键词： Staphylococcus aureus; Bovine mastitis; Rab11A; Bovine mammary epithelial cells; Phagosome

期刊名称：VETERINARY MICROBIOLOGY （ 影响因子：3.3； 五年影响因子：3.5 ）

ISSN： 0378-1135

年卷期： 2024 年 293 卷

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收录情况： SCI

摘要： Mastitis in dairy cows is mainly caused by bacteria, in which Staphylococcus aureus appears frequently. Epithelial cells, as a major physical barrier of mammary gland, play an important role in preventing mastitis in dairy cows. Our previous study reported that Rab11fip4 (an effector of Rab11) was significantly changed in response to stimulation by S. aureus. So, in this study, the role of Rab11A in phagocytosis of bovine mammary epithelial cells (MAC -T) against S. aureus was evaluated. First, changes of Rab11A and Rab11fip4 were analyzed in response to S. aureus by immunofluorescence and western blotting. Subsequently, the effects of Rab11A and Rab11fip4 on proliferation of S. aureus, as well as formation and function of late endosomes (LEs) and lysosomes (LYSs) were investigated. The results showed that, after infection, Rab11A and Rab11fip4 were recruited to phagosomes containing S. aureus. Rab11A promoted bacterial clearance and rescues the destruction of LEs and LYSs by S. aureus, whereas Rab11fip4 did the opposite. These findings provide new insights into phagocytosis and control of S. aureus in host cells, thus lay the foundation to elucidate the pathogenesis of S. aureus in bovine mastitis.

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