JCC: 炎症性肠病中的粪便生物标志物:钙卫蛋白与脂蛋白2的对比研究

2020-06-22 MedSci原创 MedSci原创

粪便生物标志物,特别是粪钙卫蛋白(FCAL),已成为炎症性肠病(IBD)的重要诊断和监测工具。

背景和目标:

粪便生物标志物,特别是粪钙卫蛋白(FCAL),已成为炎症性肠病(IBD)的重要诊断和监测工具。由于FCAL主要是由中性粒细胞产生的,因此本项研究假设由肠上皮细胞(IEC)表达的粪便lipocalin-2(FLCN2)在特定的情况下也能反应肠道炎症。

方法:

本项研究比较了在132名患者(其中72名CD)和40名对照组中检测到的FCAL和FLCN2在临床和内镜活动相关的相关性。详细的细胞起源的分析是通过做激光共聚焦显微镜和流 - 流式细胞仪。

结果:

FCAL和FLCN2之间具有极好的相关性(RS = 0.87,p <0.001),并且可预测临床和内镜疾病活动的敏感性和特异性相当,溃疡性结肠炎的内镜活动最佳阈值为73.4和1.98 µg / g(对于FCAL和FLCN2,在克罗恩病(CD)中分别为78.4和0.56 µg / g。在粒细胞和巨噬细胞中观察到两种蛋白的强共表达。IEC表示LCN2,但不表示FCAL。在深度缓解的IBD队列中,FCAL和FLCN2均与对照组没有区别,但UC直肠和CD患者回肠的粘膜LCN2而非CAL表达仍然升高。

结论:

这项研究证实了FLCN2和FCAL在IBD中的诊断等效性。在缓解中,持续的粘膜过度表达使 LCN2成为分子炎症的候选物,有待进一步研究。

原始出处:

Andreas Zollner. Et al. Fecal biomarkers in inflammatory bowel diseases: calprotectin versus lipocalin-2 – a comparative study. Journal of Crohn's and Colitis.2020.

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    2020-06-24 Homburg
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