The Role of Gut Microbiota in the Pathogenesis of Ankylosing Spondylitis (AS), and the Effect of Fecal Microbiota Transplantation on Gut Microbiota, Gut Wall Inflammation and Clinical Activity of AS
试验速览
- 阶段
- 早期 1 期
- 发起方
- 入组人数
- 20
- 试验地点
- 2
- 主要终点
- The effect of FMT (fecal microbiota transplantation) on the clinical activity of ankylosing spondylitis (AS) as assessed by change in BASDAI (Bath Ankylosing Spondylitis Disease Activity Index).
研究概览
简要总结
Ankylosing spondylitis (AS) patients often have subclinical gut wall inflammation. Gut dysbiosis has been associated with both AS and Crohn disease, both of which have several features in common. Gut dysbiosis is associated with specific microbial profile in AS patients. Fecal microbiota transplantation (FMT) has been proved to be safe and effective treatment for recurrent Clostridium difficile infection, and the change in gut microbiota is shown to be long lasting. It has led to interest to study its effect on different inflammatory conditions associated with gut dysbiosis.
We hypothesize that dysbiosis in AS leads to inflammasome overactivation on gut mucosa. We aim to study the role of gut inflammation, gut microbiota and inflammasome activation in pathogenesis of AS, and the effect of FMT on these factors, as well as clinical activity, in AS patients.
详细描述
This is a double-blind placebo- controlled randomized pilot study with 20 patients with active AS from 2 Finnish outpatient clinics. An ileocolonoscopy will be performed to all patients. 10 patients will receive FMT with feces of one of two healthy donors, and 10 patients with their own feces during ileocolonoscopy. Ileal and colonic biopsies will be taken to assess gut wall inflammation and mucosal microbiota composition. Ileocolonoscopy will be controlled in 6 months in patients with macroscopic inflammatory lesions in the first colonoscopy. From mucosal biopsies we will assess intestinal mucosal structure, inflammasome activity, cytokine expression, and the mucin layer thickness and the amount of bacterial LPS (lipopolysaccharide), which are associated with mucosal integrity. Blood levels of zonulin and LPS as indicators of mucosal permeability and bacterial penetrance will be assessed. Fecal samples will be collected repeatedly to measure fecal calprotectin, and to assess the bacterial profile changes. From mucosal biopsies and fecal samples microbial DNA will be segregated and bacterial species sorted by rRNA- based sequence technique. Clinical activity of AS will be assessed in follow-up visits as well as repeated BASDAI (Bath Ankylosing Spondylitis Disease Activity Index), BASFI (Bath Ankylosing Spondylitis Functional Index) and MASES (Maastricht Ankylosing Spondylitis Enthesitis Score) evaluations, and measurement of CRP (C-reactive protein) and ESR (erythrocyte sedimentation rate). Follow-up time is 12 months.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Triple (Participant, Care Provider, Investigator)
盲法说明
FMT type (donor/own feces) randomization is done by a study nurse.
入排标准
- 年龄范围
- 18 Years 至 75 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Diagnosis of AS by either the 1984 New York criteria or the ASAS (Assessment of SpondyloArthritis International Society) criteria for axial spondyloarthritis.
- •Active disease measured by BASDAI >
- •Availability of consecutive fecal samples over 1 year period.
- •Compliance to attend ileocolonoscopy and FMT procedure.
排除标准
- •Diagnosis of inflammatory bowel disease.
- •Antibiotic therapy within the last 3 months.
- •Use of any probiotics within the last 3 months.
- •Pregnancy.
- •Unability to provide a written consent.
- •Other reason which by the opinion of the investigator makes patient ineligible for the study.
研究组 & 干预措施
Study group
Allogeneic fecal microbiota transplantation (from donor)
干预措施: Fecal microbiota transplantation (Other)
Control group
Autologous fecal microbiota transplantation (own stool)
干预措施: Fecal microbiota transplantation (Other)
结局指标
主要结局
The effect of FMT (fecal microbiota transplantation) on the clinical activity of ankylosing spondylitis (AS) as assessed by change in BASDAI (Bath Ankylosing Spondylitis Disease Activity Index).
时间窗: 5 measurements within 12 months
BASDAI scale 0-10 (the higher the score the more severe the symptoms). Decrease in BASDAI indicates positive outcome.
次要结局
- The effect of FMT on the clinical activity of AS as assessed by change in BASFI (Bath Ankylosing Spondylitis Functional Index).(5 measurements within 12 months.)
- The effect of FMT on the clinical activity of AS as assessed by change in MASES (Maastricht Ankylosing Spondylitis Enthesitis Score).(5 measurements within 12 months.)
- The effect of FMT on C-reactive protein (CRP) concentration.(7 measurements within 12 months.)
- The effect of FMT on erythrocyte sedimentation rate (ESR) level.(7 measurements within 12 months.)
- The effect of FMT on gut wall inflammation as assessed by change in fecal calprotectin (F-calpro) level.(7 measurements within 12 months.)
- The effect of FMT on gut microbiota composition in AS patients.(7 stool microbial analysis within 12 months.)
- Association between specific intestinal pathogens and disease activity as assessed by BASDAI score.(7 stool microbial samples and 5 BASDAI measurements within 12 months.)
- Association between specific intestinal pathogens and disease activity as assessed by CRP concentration.(7 stool microbial samples and 7 CRP measurements within 12 months.)
- Association between gut wall cytokine expression and disease activity as assessed by BASDAI score.(Intestinal biopsies at baseline.)
- Association between gut wall inflammasome activity and disease activity as assessed by BASDAI score.(Intestinal biopsies at baseline.)
- Association between gut wall cytokine expression and disease activity as assessed by CRP concentration.(Intestinal biopsies at baseline.)
- Association between gut wall inflammasome activity and disease activity as assessed by CRP concentration.(Intestinal biopsies at baseline.)
- Association between F-Calpro level and disease activity as assessed by BASDAI score.(7 F-Calpro- measurements and 5 BASDAI measurements within 12 months.)
- Association between F-Calpro level and disease activity as assessed by CRP concentration.(7 F-Calpro and CRP measurements within 12 months.)
- The effect of FMT on gut wall permeability as assessed by blood zonulin concentration.(5 measurements within 12 months.)
- The effect of FMT on gut wall bacterial penetrance as assessed by lipopolysaccharide (LPS) concentration.(5 measurements within 12 months.)
- The effect of FMT on gastrointestinal symptoms as assessed by GSRS (The Gastrointestinal Symptom Rating Scale).(5 GSRS evaluations within 12 months.)
研究者
Johanna Hiltunen
MD, Principal Investigator
Hospital District of Helsinki and Uusimaa