当前位置: X-MOL 学术Sci. Rep. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Overexpression of corticotropin-releasing factor in intestinal mucosal eosinophils is associated with clinical severity in Diarrhea-Predominant Irritable Bowel Syndrome
Scientific Reports ( IF 3.8 ) Pub Date : 2020-11-26 , DOI: 10.1038/s41598-020-77176-x
Eloísa Salvo-Romero , Cristina Martínez , Beatriz Lobo , Bruno K. Rodiño-Janeiro , Marc Pigrau , Alejandro D. Sánchez-Chardi , Ana M. González-Castro , Marina Fortea , Cristina Pardo-Camacho , Adoración Nieto , Elba Expósito , Danila Guagnozzi , Amanda Rodríguez-Urrutia , Inés de Torres , Ricard Farré , Fernando Azpiroz , Carmen Alonso-Cotoner , Javier Santos , María Vicario

Corticotropin-releasing factor (CRF) has been identified in intestinal mucosal eosinophils and associated with psychological stress and gut dysfunction. Irritable bowel syndrome (IBS) is commonly characterized by altered intestinal motility, immune activation, and increased gut barrier permeability along with heightened susceptibility to psychosocial stress. Despite intensive research, the role of mucosal eosinophils in stress-associated gut dysfunction remains uncertain. In this study, we evaluated eosinophil activation profile and CRF content in the jejunal mucosa of diarrhea-predominant IBS (IBS-D) and healthy controls (HC) by gene/protein expression and transmission electron microscopy. We also explored the association between intestinal eosinophil CRF and chronic stress, and the potential mechanisms underlying the stress response by assessing eosinophil response to neuropeptides. We found that mucosal eosinophils displayed higher degranulation profile in IBS-D as compared to HC, with increased content of CRF in the cytoplasmic granules, which significantly correlated with IBS clinical severity, life stress background and depression. Eosinophils responded to substance P and carbachol by increasing secretory activity and CRF synthesis and release, without promoting pro-inflammatory activity, a profile similar to that found in mucosal eosinophils from IBS-D. Collectively, our results suggest that intestinal mucosal eosinophils are potential contributors to stress-mediated gut dysfunction through CRF production and release.



中文翻译:

腹泻型肠易激综合征中肠黏膜嗜酸性粒细胞过度表达促肾上腺皮质激素释放因子与临床严重程度有关

促肾上腺皮质激素释放因子(CRF)已在肠粘膜嗜酸性粒细胞中发现,并与心理压力和肠道功能障碍有关。肠易激综合症(IBS)通常以肠道蠕动改变,免疫激活和肠屏障通透性增加以及对社会心理压力的敏感性增强为特征。尽管进行了深入的研究,黏膜嗜酸性粒细胞在应激相关的肠道功能障碍中的作用仍然不确定。在这项研究中,我们通过基因/蛋白质表达和透射电子显微镜评估了腹泻为主的IBS(IBS-D)和健康对照(HC)的空肠黏膜中的嗜酸性粒细胞活化谱和CRF含量。我们还探讨了肠嗜酸性粒细胞CRF与慢性应激之间的关系,通过评估嗜酸性粒细胞对神经肽的反应,以及潜在的应激反应机制。我们发现,与HC相比,IBS-D中的黏膜嗜酸性粒细胞显示出更高的脱粒分布,胞质颗粒中CRF的含量增加,这与IBS临床严重程度,生活压力背景和抑郁症显着相关。嗜酸性粒细胞通过增加分泌活性和CRF合成和释放而对P物质和卡巴胆碱作出反应,而没有促进促炎活性,这种分布与IBS-D的黏膜嗜酸性粒细胞相似。总体而言,我们的研究结果表明,肠黏膜嗜酸性粒细胞是通过CRF产生和释放而导致应激介导的肠道功能障碍的潜在因素。我们发现,与HC相比,IBS-D中的黏膜嗜酸性粒细胞显示出更高的脱粒分布,胞质颗粒中CRF的含量增加,这与IBS临床严重程度,生活压力背景和抑郁症显着相关。嗜酸性粒细胞通过增加分泌活性和CRF合成和释放而对P物质和卡巴胆碱作出反应,而没有促进促炎活性,这种分布与IBS-D的黏膜嗜酸性粒细胞相似。总体而言,我们的研究结果表明,肠黏膜嗜酸性粒细胞是通过CRF产生和释放而导致应激介导的肠道功能障碍的潜在因素。我们发现,与HC相比,IBS-D中的黏膜嗜酸性粒细胞显示出更高的脱粒分布,胞质颗粒中CRF的含量增加,这与IBS临床严重程度,生活压力背景和抑郁症显着相关。嗜酸性粒细胞通过增加分泌活性和CRF合成和释放而对P物质和卡巴胆碱作出反应,而没有促进促炎活性,这种分布与IBS-D的黏膜嗜酸性粒细胞相似。总体而言,我们的研究结果表明,肠黏膜嗜酸性粒细胞是通过CRF产生和释放而导致应激介导的肠道功能障碍的潜在因素。嗜酸性粒细胞通过增加分泌活性和CRF合成和释放而对P物质和卡巴胆碱作出反应,而没有促进促炎活性,这种分布与IBS-D的黏膜嗜酸性粒细胞相似。总体而言,我们的研究结果表明,肠黏膜嗜酸性粒细胞是通过CRF产生和释放而导致应激介导的肠道功能障碍的潜在因素。嗜酸性粒细胞通过增加分泌活性和CRF合成和释放而对P物质和卡巴胆碱作出反应,而没有促进促炎活性,这种分布与IBS-D的黏膜嗜酸性粒细胞相似。总体而言,我们的研究结果表明,肠黏膜嗜酸性粒细胞是通过CRF产生和释放而导致应激介导的肠道功能障碍的潜在因素。

更新日期:2020-11-27
down
wechat
bug