The humoral pattern recognition receptor PTX3 is stored in neutrophil granules and localizes in extracellular traps.

The humoral pattern recognition receptor PTX3 is stored in neutrophil granules and localizes in extracellular traps.
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DOI:
10.1084/jem.20061301
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发表时间:
2007-04-16
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Mantovani A
Mantovani A
中科院分区:
其他
文献类型:
--
作者:
Jaillon S;Peri G;Delneste Y;Frémaux I;Doni A;Moalli F;Garlanda C;Romani L;Gascan H;Bellocchio S;Bozza S;Cassatella MA;Jeannin P;Mantovani A

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长五聚蛋白 (PTX) 3 由巨噬细胞和髓样树突状细胞响应 Toll 样受体激动剂而产生,代表针对选定病原体的体液先天免疫的非冗余成分。我们报告说,出乎意料的是,PTX3 储存在特定的颗粒中,并响应微生物识别和炎症信号而释放。释放的 PTX3 可以部分定位于由挤出的 DNA 形成的中性粒细胞胞外陷阱中。嗜酸性粒细胞和嗜碱性粒细胞不含有预先形成的 PTX3。缺乏 PTX3 的中性粒细胞具有缺陷的微生物识别和吞噬作用,并且 PTX3 对于中性粒细胞介导的烟曲霉耐药性是非冗余的。因此,中性粒细胞充当长 PTX3 的储存库,准备快速释放,PTX3 是具有调理活性的体液先天免疫的关键组成部分。
The long pentraxin (PTX) 3 is produced by macrophages and myeloid dendritic cells in response to Toll-like receptor agonists and represents a nonredundant component of humoral innate immunity against selected pathogens. We report that, unexpectedly, PTX3 is stored in specific granules and undergoes release in response to microbial recognition and inflammatory signals. Released PTX3 can partially localize in neutrophil extracellular traps formed by extruded DNA. Eosinophils and basophils do not contain preformed PTX3. PTX3-deficient neutrophils have defective microbial recognition and phagocytosis, and PTX3 is nonredundant for neutrophil-mediated resistance against Aspergillus fumigatus. Thus, neutrophils serve as a reservoir, ready for rapid release, of the long PTX3, a key component of humoral innate immunity with opsonic activity.
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