Kidney α-intercalated cells and lipocalin 2: defending the urinary tract.

Kidney α-intercalated cells and lipocalin 2: defending the urinary tract.
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肾α-嵌入细胞和脂质运载蛋白2:保卫尿路。

DOI:
10.1172/jci76630
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发表时间:
2014
期刊:
The Journal of clinical investigation
影响因子:
--
通讯作者:
Abraham,SomanN
Abraham,SomanN
中科院分区:
--
文献类型:
--
作者:
Miao,Yuxuan;Abraham,SomanN

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越来越多的证据表明,肾脏对泌尿道中病原体的免疫防御有很大贡献。Paragas等人在本期中报告称,肾单位集合管内的α-嵌入细胞(A-IC)感知感染革兰氏阴性菌,导致同时分泌铁螯合蛋白脂质运载蛋白2(LCN 2)和质子,从而酸化尿液。A-IC特异性LCN 2和质子分泌显著降低UAE的感染能力。大肠杆菌(UPEC)生长和维持感染。A-IC感知和积极促进下尿路感染细菌清除的能力代表了这些特化肾细胞的新功能,这些特化肾细胞以其调节酸碱平衡的作用而闻名。
A growing body of evidence indicates that the kidneys contribute substantially to immune defense against pathogens in the urinary tract. In this issue, Paragas et al. report that α–intercalated cells (A-ICs) within the nephron collecting duct sense infecting Gram-negative bacteria, resulting in simultaneously secretion of the iron chelating protein lipocalin 2 (LCN2) and protons, which acidify the urine. A-IC–specific LCN2 and proton secretion markedly reduced the ability of infecting uropathogenicE. coli(UPEC) to grow and sustain infection. The capacity of A-ICs to sense and actively promote clearance of infecting bacteria in the lower urinary tract represents a novel function for these specialized kidney cells, which are best known for their role in modulating acid-base homeostasis.
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