Institute of Pathology, Faculty of Medicine, University of Ljubljana, Korytkova 2, 1000 Ljubljana, Slovenia.
Int J Mol Sci. 2024 Aug 13;25(16):8826. doi: 10.3390/ijms25168826.
Crohn's disease (CD) is frequently complicated by strictures that can be either inflammatory or fibrostenotic. This distinction is important for deciding the best treatment course, but it can be difficult to determine clinically, sometimes even by advanced imaging techniques. We performed miRNA PCR panel screening on pooled samples of ileum with CD fibrostenosis or inflammatory stenosis. Eight miRNAs with profibrotic (, and ), or fibroprotective (, , , and ) functions described in the literature were selected for validation on 20 samples each of CD with fibrostenosis or inflammatory stenosis, with a separate sampling of the submucosa and subserosa. The results showed significant differences between the groups in subserosal samples, with upregulation of profibrotic miRNAs and downregulation of fibroprotective miRNAs in fibrostenosis compared to inflammatory stenosis. Only showed a significant difference in the submucosa. There were significant differences in miRNA expression between subserosa and submucosa. Our results provide further evidence that the major differences between fibrostenosis and inflammatory stenosis are located in the subserosa, which is inaccessible to endoscopic sampling, highlighting the need for cross-sectional imaging or serological markers. We identify several miRNAs previously not connected to fibrosis in CD, which could potentially serve as biomarkers of fibrostenosis.
克罗恩病(CD)常伴有狭窄,可分为炎症性或纤维性狭窄。这种区别对于决定最佳治疗方案很重要,但临床上有时甚至通过先进的成像技术也难以确定,我们对患有 CD 纤维性狭窄或炎症性狭窄的回肠进行了 miRNA PCR 小组筛选。选择了具有文献中描述的致纤维增生(、和)或纤维保护(、、、和)功能的 8 种 miRNA 进行验证,对 20 例纤维性狭窄或炎症性狭窄的 CD 样本进行了验证,对黏膜下层和浆膜层进行了单独取样。结果显示,在浆膜层样本中,纤维化组的致纤维增生 miRNA 上调,纤维保护 miRNA 下调,与炎症性狭窄相比差异显著。仅在黏膜下层中显示出显著差异。黏膜下层和浆膜层之间的 miRNA 表达存在显著差异。我们的研究结果进一步证明,纤维化与炎症性狭窄之间的主要区别位于浆膜层,浆膜层无法进行内镜取样,这突出了需要进行横断面成像或血清标志物检测。我们鉴定了一些以前与 CD 纤维化无关的 miRNA,它们可能作为纤维化狭窄的生物标志物。
Int J Mol Sci. 2024-8-13
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