Persistent and selective effects of inflammation on smooth muscle cell contractility in rat colitis

Intestinal inflammation affects smooth muscle contractility contributing to altered motility, but changes to the individual smooth muscle cells are not well described. We used video microscopy to study the contractility of circular smooth muscle cells (CSMC) isolated from the rat mid-descending colon throughout the course of TNBS-induced colitis, measuring their shortening response to carbachol (CCh), 5-HT, histamine or high K⁺. In control CSMC, CCh caused a maximal shortening response of 28 (2%), similar to that for 5-HT of 27 (1%), but by day 4 of colitis, these responses were decreased by 35% and 37%, respectively. By day 36, all aspects of cholinergic contraction returned to control levels, while 5-HT-induced contraction remained significantly attenuated. In contrast, the contractile responses to histamine remained similar at all time points. K⁺-induced contraction was impaired only on day 4, and the maximal response remained substantially greater than CCh or 5-HT. Colitis caused a 121% increase in CSMC length by day 2 that persisted through day 36, independent evidence for phenotypic change. We conclude that impaired CSMC contractility at both the receptor and non-receptor levels contribute to altered smooth muscle function during colitis. Persistent changes in contractile response remained detectable after resolution of inflammation, and similar events may occur in post-enteritis syndromes seen in humans.     

身心因素与肠易激综合征患者生活质量的相关研究

目的调查肠易激综合征(IBS)患者生活质量状况并评估躯体及心理因素对它的影响。方法采用肠易激综合征生活质量量表(IBS-QOL)、临床症状问卷、艾森克人格问卷简式(EPQ-RSC)、简明心境问卷简式(POMS-SF)、医学应对问卷(MCMQ)对120例IBS患者进行测查,将IBS患者的心理健康水平(人格、情绪、应对)及躯体症状(肠道症状、肠外症状、睡眠障碍)与IBS患者生活质量进行相关分析。结果IBS患者IBS-QOL的8个因子和总分均显著降低(P<0.05),其中健康忧虑和饮食限制降低最为明显,除IBS症状外,肠外症状、睡眠障碍、精神心理异常在IBS患者中也很常见。心理因素中EPQ-RSC神经质(N)分、POMS中焦虑、抑郁等多项因子分及总分、MCMQ屈服积分与IBS-QOL总分呈负相关;躯体因素中IBS症状、肠外症状、睡眠障碍积分与IBS-QOL总分呈负相关。结论肠易激综合征患者的生活质量明显降低,除躯体症状外,心理功能失调也是决定患者生活质量的重要因素。     

Dietary Patterns in Runners with Gastrointestinal Disorders

Individuals with inflammatory bowel disease (IBD), irritable bowel syndrome (IBS) and reflux frequently experience gastrointestinal symptoms (GIS), potentially enhanced by high-intensity running. Food avoidances, food choices, and GIS in runners with IBS/IBD (n = 53) and reflux (n = 37) were evaluated using a reliability and validity tested questionnaire. Comparisons to a control group of runners (n = 375) were made using a Fisher’s Exact test. Runners with IBS/IBD experienced the greatest amount of exercise-induced GIS followed by those with reflux. Commonly reported GIS were stomach pain/cramps (77%; 53%), bloating (52%; 50%), intestinal pain/cramps (58%; 33%), and diarrhea (58%; 39%) in IBS/IBD and reflux groups respectively. In the pre-race meal, those with IBS/IBD frequently avoided milk products (53%), legumes (37%), and meat (31%); whereas, runners with reflux avoided milk (38%), meat (36%), and high-fibre foods (33%). When considering food choices pre-race, runners with IBS/IBD chose grains containing gluten (40%), high fermentable oligo-, di-, mono-saccharides and polyols (FODMAP) fruits (38%), and water (38%). Runners with reflux chose water (51%), grains containing gluten (37%), and eggs (31%). In conclusion, while many runners with IBS/IBD and reflux are avoiding trigger foods in their pre-race meals, they are also consuming potentially aggravating foods, suggesting nutrition advice may be warranted.     

Diarrhea Predominant-Irritable Bowel Syndrome (IBS-D): Effects of Different Nutritional Patterns on Intestinal Dysbiosis and Symptoms

Irritable Bowel Syndrome (IBS) is a chronic functional gastrointestinal disorder characterized by abdominal pain associated with defecation or a change in bowel habits. Gut microbiota, which acts as a real organ with well-defined functions, is in a mutualistic relationship with the host, harvesting additional energy and nutrients from the diet and protecting the host from pathogens; specific alterations in its composition seem to play a crucial role in IBS pathophysiology. It is well known that diet can significantly modulate the intestinal microbiota profile but it is less known how different nutritional approach effective in IBS patients, such as the low-FODMAP diet, could be responsible of intestinal microbiota changes, thus influencing the presence of gastrointestinal (GI) symptoms. The aim of this review was to explore the effects of different nutritional protocols (e.g., traditional nutritional advice, low-FODMAP diet, gluten-free diet, etc.) on IBS-D symptoms and on intestinal microbiota variations in both IBS-D patients and healthy subjects. To date, an ideal nutritional protocol does not exist for IBS-D patients but it seems crucial to consider the effect of the different nutritional approaches on the intestinal microbiota composition to better define an efficient strategy to manage this functional disorder.     

国产万拉法新治疗肠易激综合征的初步临床研究

目的 观察国产新药万拉法新对肠易激综合征（IBS）及其伴随的焦虑和抑郁症状的临床治疗效果。方法 选择48例IBS患者,随机分为治疗组和对照组,分别服用万拉法新及硝苯地平进行为期4周的治疗,通过对IBS各项症状的改善率和总体改善率评定观察治疗效果。同时采用Zung编制的抑郁自评量表和焦虑自评量表进行评分观察治疗前后抑郁和焦虑的改善程度。结果 万拉法新对IBS的治疗总体改善率为80％,对照组为52．17％（P＜0．05）。万拉法新治疗前后焦虑和抑郁的改善程度经检验均有统计学意义（P＜0．01）。结论 单独应用万拉法新对IBS的总体治疗效果优于硝苯地平组,对改善伴随的焦虑和抑郁症状有明显的疗效。     

马来酸曲美布汀联合门诊森田疗法治疗肠易激综合征的临床研究

目的 :观察马来酸曲美布汀联合门诊森田疗法治疗肠易激综合征 (irritablebowelsyndrome ,IBS)的临床疗效。方法 :10 8例患者随机分为 2组。马来酸曲美布汀组 5 4例 :2 0 0mg马来酸曲美布汀 ,po ,tid ,配合门诊森田心理疗法 ,治疗前、后以焦虑自评量表 (SAS)和抑郁自评量表 (SDS)评定疗效 ;对照组5 4例 :仅用 2 0 0mg马来酸曲美布汀 ,po ,tid ,2组疗程均为 4周。结果 :马来酸曲美布汀组和对照组总有效率分别为 87.0 4 %与 72 .2 2 % ,马来酸曲美布汀组明显优于对照组 (P <0 .0 5 )。马来酸曲美布汀组治疗后SAS、SDS评分与对照组比较均有明显下降(P <0 .0 1)。马来酸曲美布汀组 6月复发率与对照组比较明显降低 (P <0 .0 1)。结论 :马来酸曲美布汀联合门诊森田疗法是治疗肠易激综合征更有效的治疗方法。     

中医视角下肠易激综合征的生理病理观探讨

易激综合征（IBs）是消化系统常见的疾病，其病症病因复杂，发病率高，发病机制迄今未明。本研究拟通过中医五脏整体病理观探讨IBS的病因病机、发病机理、病理变化以及其诊断和防治的理论与方法。     

A systematic review of Tuina for irritable bowel syndrome: Recommendations for future trials

ObjectivesThis systematic review assessed whether Tuina (therapeutic massage) is more effective and safer than no treatment or routine medical treatment for irritable bowel syndrome (IBS).MethodsEleven databases were searched for randomized controlled trials of IBS diagnosed based on Manning or Rome criteria. Tuina with or without routine treatments (RTs) was tested against RTs. The Cochrane risk of bias was evaluated for each trial. RevMan 5.3 was used to conduct a meta-analysis.ResultsA total of 8 trials (5 IBS-diarrhea and 3 IBS-constipation) with 545 participants using 8 different manipulations were included. All trials were published in Chinese. For overall symptom improving rate (> 30 % improvement in overall symptom scores), it had not been shown that Tuina was significantly better than RTs (RR 1.23, 95 % CI 0.94–1.60, 197 participants, 3 studies, I² = 65 %) for IBS-diarrhea, and Tuina combined with RTs showed more benefit than RTs alone (RR 1.29, 95 % CI 1.08–1.54, 115 participants, 3 studies) for IBS-diarrhea. All trials did not report adverse effect in relation to Tuina. Risk of bias was generally unclear across all domains.ConclusionsTuina combined with RTs may be superior to RTs for improving overall symptom of IBS-diarrhea. Due to the existing methodological issues and the heterogeneity of Tuina manipulation, current findings need to be confirmed in large scale, multicenter, and robust randomized trials (especially on outcome assessing blinding and allocation concealment).