Efficacy of Rifaximin for Diarrhea-predominant Irritable Bowel Syndrome With Positive Lactulose Hydrogen Breath Test
试验速览
- 阶段
- 不适用
- 发起方
- 入组人数
- 120
- 试验地点
- 1
- 主要终点
- the proportion of patients who had adequate relief of global IBS symptoms
研究概览
简要总结
Irritable bowel syndrome (IBS) is a common disease and the pathogenesis of this disease includes central and peripheral mechanisms. In recent years, there were many studies suggesting that microbiota in the intestine may play an important role in the IBS.What's more, small intestinal bacterial overgrowth (SIBO) may be an important pathogenic factor for IBS and the use of antibiotics may be beneficial. Therefore, the investigators intend to explore the efficacy of rifaximin for IBS-D in Chinese population.
详细描述
Recent evidence suggests that a shift in the host-gut microbial relationship as seen in small intestinal bacterial overgrowth (SIBO) may contribute to the pathogenesis of IBS.Overgrowth of microbiota in the small intestine can cause excessive gas production and malabsorption with a variety of nonspecific symptoms, such as diarrhea, gas bloating, abdominal pain and constipation.Glucose (GBT) and lactulose (LBT) breath test have been proposed as simple, inexpensive and non-invasive diagnostic tools for detecting SIBO with respect to the gold standard (the culture of intestinal aspirates). Many antibiotics have been proposed in the last years for SIBO eradication.Rifaximin is a rifamycin derivative with antibacterial activity caused by inhibition of bacterial synthesis of RNA and which is effective against both gram-positive and -negative bacteria, including aerobes and anaerobes.As <0.1% of its oral dose is absorbed, rifaximin administration is associated to a very low side-effect incidence. However,there are still no effective and reliable treatment for IBS,so we intend to explore the prevalence of SIBO in IBS-D patients and evaluate the efficacy of rifaximin for IBS-D in Chinese population.
研究设计
- 研究类型
- Observational
- 观察模型
- Case Control
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 65 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •aged 18-65 yr;
- •IBS-D fulfiling the ROME III criteria;
- •had undergone a colonoscopic examination within the previous 2 years;
- •had received a diagnosis of and had current symptoms of IBS, in particular, symptoms of abdominal pain and discomfort; and did not have adequate relief of global IBS symptoms and of IBS-related bloating at both the time of screening and the time of randomization.
排除标准
- •age <18 years;
- •use of antimicrobial agents within the previous 3 months;
- •known hypersensitivity to agents belonging to rifamycin and/or tetracycline families;
- •pregnancy or breast-feeding;
- •evidence of major concomitant diseases (including tumours and hepatic and ⁄ or renal insufficiency);
- •not on antibiotic treatment or probiotics for at least 4 weeks prior to undergoing the LHBT;
- •fibre supplements or laxatives 1-week prior to the LHBT test date
- •presence of endoscopic or histological alterations, which might be indicative of other disorders (e.g. celiac disease, inflammatory bowel disease, diverticulosis or diverticulitis) and contribute to IBS symptom generation,
- •evidence of major concomitant diseases (including tumours and hepatic and/or renal insufficiency)
- •unstable thyroid disease
- •bowel obstruction
- •known lactose intolerance
- •any evidence of advanced organic or psychiatric disease that may impact on the patient's compliance or adherence to the study protocol.
- •use of medications known to cause constipation (eg, narcotics, antidiarrheals, alosetron)
- •history of abdominal surgery involving the gastrointestinal tract such as appendicectomy, cholecystectomy
- •Inability to sign or rejection to informed consent
结局指标
主要结局
the proportion of patients who had adequate relief of global IBS symptoms
时间窗: 12 weeks
次要结局
- the proportion of patients who with positive lactulose hydrogen breath test change to be negative(2 weeks)
- the composition of patients's fecal microbiota(2 weeks)
研究者
XiaojunZhuang
doctor
First Affiliated Hospital, Sun Yat-Sen University