Expression profile of porcine scavenger receptor A and its role in bacterial phagocytosis by macrophages.

Expression profile of porcine scavenger receptor A and its role in bacterial phagocytosis by macrophages.
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DOI:
10.1016/j.dci.2019.103534
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发表时间:
2020-03
影响因子:
2.9
通讯作者:
Qiu Y
Qiu Y
中科院分区:
生物学3区
文献类型:
--
作者:
Xiang X;Zhang Y;Li Q;Wei J;Liu K;Shao D;Li B;Olszewski MA;Ma Z;Qiu Y

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巨噬细胞清道夫受体A(Screvenger Receptor A,SRA)的表达在巨噬细胞介导的微生物摄取中起着关键作用。然而,猪清道夫受体A(PSRA)在猪巨噬细胞吞噬功能中的作用却知之甚少。本研究利用重组蛋白制备抗PSRA的多克隆抗体,以研究PSRA的表达和功能。我们报道了PSRA在不同组织中的广泛表达。在肺组织中,PSRA主要由肺泡巨噬细胞表达。岩藻糖胶阻断A类清道夫受体,表明PSRA在巨噬细胞吞噬细菌过程中起作用。此外,在表达PSRA的CHO细胞系中,SRA介导的细菌吞噬作用的重要性已经被证明。综上所述,这些发现表明,主要在肺泡巨噬细胞中表达的PSRA可能是一个重要的受体,介导猪肺对细菌的识别和摄取。
Expression of scavenger receptor A (SRA) in macrophages plays key role in macrophage mediated uptake of microbes. However, little is known about the role of porcine scavenger receptor A (pSRA) in phagocytic function of macrophages in swine species. In this study, polyclonal antibody against pSRA was generated by using recombinant proteins to study expression and function of pSRA. We report broad expression of pSRA in different tissues. In the lungs, pSRA is mainly expressed by alveolar macrophages. Blockade of class A scavenger receptor by fucoidan treatment demonstrates that pSRA has role in bacterial phagocytosis by macrophages. Furthermore, importance of SRA-mediated bacterial phagocytosis has been shown using CHO cell line expressing pSRA. In summary, these findings reveal that pSRA, which is predominantly expressed in alveolar macrophages is likely to be an important receptor mediating recognition and uptake of bacteria in pig lungs.
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