Chemotaxis inhibitory protein of Staphylococcus aureus, a bacterial antiinflammatory agent.

Chemotaxis inhibitory protein of Staphylococcus aureus, a bacterial antiinflammatory agent.
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DOI:
10.1084/jem.20031636
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发表时间:
2004-03-01
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
van Strijp JA
van Strijp JA
中科院分区:
其他
文献类型:
--
作者:
de Haas CJ;Veldkamp KE;Peschel A;Weerkamp F;Van Wamel WJ;Heezius EC;Poppelier MJ;Van Kessel KP;van Strijp JA

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白细胞迁移是宿主防御入侵病原体和炎症的关键事件。细菌主要通过排泄(甲酰化肽)、补体激活(C5a)和随后的白细胞激活(如白三烯B4、血小板活化因子和白细胞介素8)产生化学引诱剂。在这里,我们描述了一种由金黄色葡萄球菌分泌的新蛋白,它特异性地损害中性粒细胞和单核细胞对甲酰化肽和C5a的反应。这种金黄色葡萄球菌趋化抑制蛋白(CHIPS)是一种编码在噬菌体上的14.1 kd蛋白,在60%的临床分离株中发现。在小鼠腹膜炎模型中,CHIPS减少了中性粒细胞向C5a的募集,尽管其对人类细胞的活性比对小鼠细胞的活性更强。这些发现提示了金黄色葡萄球菌一种新的免疫逃逸机制,并提出CHIPS作为一种潜在的新型抗炎治疗化合物。
Leukocyte migration is a key event both in host defense against invading pathogens as well as in inflammation. Bacteria generate chemoattractants primarily by excretion (formylated peptides), complement activation (C5a), and subsequently through activation of leukocytes (e.g., leukotriene B4, platelet-activating factor, and interleukin 8). Here we describe a new protein secreted by Staphylococcus aureus that specifically impairs the response of neutrophils and monocytes to formylated peptides and C5a. This chemotaxis inhibitory protein of S. aureus (CHIPS) is a 14.1-kD protein encoded on a bacteriophage and is found in >60% of clinical isolates. CHIPS reduces the neutrophil recruitment toward C5a in a mouse peritonitis model, even though its activity is much more potent on human than on mouse cells. These findings suggest a new immune escape mechanism of S. aureus and put forward CHIPS as a potential new antiinflammatory therapeutic compound.
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