Plain English Summary
Background and study aims
Ulcerative colitis (UC) is a condition which cause long-term inflammation (swelling) in the colon and rectum (the last part of the large intestine). The exact cause is unknown, but some think that it may be because the immune system attacks the healthy tissue of the gut (autoimmune disease). There is currently no cure, and so the main aim of treatment is to reduce the symptoms (remission) and prevent the disease from “flaring up” and becoming active again. Even when the disease is in remission, many patients still experience symptoms such as bloating, diarrhoea and abdominal (tummy) pain. Studies looking at UC in people and in the lab have found that some types prebiotics (an ingredient in some foods which helps increase the amount of 'good' bacteria in the gut) may help reduce inflammation by signalling to the immune system through specific pathways. The way this works is unclear however and requires further research. The aim of this study is to find out whether consuming prebiotics daily has an effect on gut inflammation in people with UC.
Who can participate?
Men and women aged 16-65 who have ulcerative colitis.
What does the study involve?
All participants are provided with a six week supply of Bimuno prebiotic dietary supplement and are asked to take this daily for six weeks. Before starting and at the end of the trial participants are asked to fill in a food and bowel diary to tell the researchers about what their normal diet, gut symptoms and bowel habits are like in to have information to compare the results to. Participants provide blood, stool and urine samples at the start of the trial and after six weeks of taking the supplements to measure markers of immunity and inflammation.
What are the possible benefits and risks of participating?
Bimuno is a prebiotic widely available in the UK, participants will be provided with this for free for six weeks to supplement their normal diet. The main researcher is a qualified Dietitian and will be able to answer questions about diet and at the end of the study provide any dietary advice that may be relevant to the participant (not during the trial though as diet should stay the same). Their are no anticipated risks to taking part.
Where is the study run from?
1. Guy's Hospital, London (UK)
2. Royal London Hospital, London (UK)
When is the study starting and how long is it expected to run for?
May 2016 to March 2018
Who is funding the study?
1. Clasado Ltd (UK)
2. King's College London, Diabetes and Nutritional Sciences Division (UK)
Who is the main contact?
Miss Bridgette Wilson
bridgette.wilson@kcl.ac.uk
Trial website
Contact information
Type
Public
Primary contact
Miss Bridgette Wilson
ORCID ID
Contact details
King's College London
Office 4.103
150 Stamford Street
London
SE1 9NH
United Kingdom
+44 20 7848 4552
bridgette.wilson@kcl.ac.uk
Additional identifiers
EudraCT number
ClinicalTrials.gov number
Protocol/serial number
IRAS ID: 208755
Study information
Scientific title
The effect of six-weeks dietary supplementation with prebiotics (Trans-galactooligosaccharide (B-GOS) on the expression of genes involved in immunity and inflammation in peripheral blood of adult participants with mildly active ulcerative colitis in an open label pilot study
Acronym
Prebiotics in immunity and inflammation
Study hypothesis
This is an exploratory study to investigate the impact on markers of inflammation and immunity of dietary prebiotic supplementation in gastrointestinal inflammation. This study is intended to generate hypotheses for future research into dietary interventions for gut inflammation.
Ethics approval
Yorkshire and the Humber - Bradford Leeds Research Ethics Committee, 04/10/2016, ref: 16/YH/0438
Study design
Open label multi-centre non randomised study
Primary study design
Interventional
Secondary study design
Non randomised study
Trial setting
Hospitals
Trial type
Treatment
Patient information sheet
Not available in web format, please use contact details to request a participant information sheet
Condition
Ulcerative Colitis
Intervention
All participants will be required to take one 5.5g sachet which contains 2.7g prebiotic food supplement (Bimuno, Clasado) daily for six weeks. This will be reconstituted with water and participants will be encouraged to take the sachet at the same time each day.
Participants provide blood, urine and stool samples for analysis at baseline and six weeks.
Intervention type
Supplement
Phase
Drug names
Primary outcome measures
Expression of genes involved in immunity and inflammation in peripheral blood is measured using mRNA microarray to identify target genes and qPCR to quantify changes in gene expression, at baseline and 6 weeks.
Secondary outcome measures
All secondary outcome measures will be assessed at baseline before the intervention begins and at the end of six weeks, blood, stool and urine samples will be collected at these two timepoints in order to assess the following:
1. Serum or plasma protein expression will be assessed using enzyme linked immunosorbent assays (ELISA) and standard blood laboratory techniques
2. Faecal markers of inflammation such as faecal calprotectin and human beta-defensin 2 will be measured using ELISA
3. Metabolomic profiles in urine are measured using mass spectrometric based approaches in urine metabolomics
4. Gut microbiota metabolites indicators including proteases, SCFAs, and VOC will be measured using standard laboratory techniques including gas liquid chromatography
5. pH will be measured on fresh stool using a solid probe pH meter
6. Bacterial communities and function will be measured via sequencing techniques
Overall trial start date
01/05/2016
Overall trial end date
30/03/2018
Reason abandoned
Eligibility
Participant inclusion criteria
1. Men and women aged 16-65 years
2. Women who are not currently pregnant or lactating
3. Mildly active UC defined by Gastroenterologist’s opinion and supported one or more of
3.1. CRP above normal for referring centre
3.2. Faecal calprotectin greater than 150 ug/g
3.3. Recent endoscopic evidence of active disease
4. No anticipated changes to dose or type of UC medication for the seven week trial period
5. Patients without another major medical condition (e.g. diabetes, psychiatric or current eating disorders), other gastrointestinal disease or condition (e.g. Crohn’s disease, coeliac disease, lactose or dairy allergy), known enteropathogen or history of previous major GI surgery, except cholecystectomy, appendectomy and haemorrhoidectomy
6. Participants who have not received bowel preparation for investigative procedures in the four weeks prior to the study
7. Participants who have not taken antibiotics, prebiotics or probiotics (in other food products or as supplements) in the four weeks prior to, or during the study
8. Individuals able to give informed consent
9. Individuals willing to participate
Participant type
Patient
Age group
Adult
Gender
Both
Target number of participants
18
Participant exclusion criteria
1. Factors affecting immunity and inflammation
1.1. Started azathioprine, mercaptopurine or thioguanine therapy less than 12 weeks previously or who have changed dose in the previous 6 weeks
1.2. Started 5-asa (mesalazine) therapy less than 8 weeks previously or who have changed dose in the previous 2 weeks
1.3. Prescribed use of steroids
1.4. Prescribed use of methotrexate
1.5. Prescribed use of the immunosuppressant drugs ciclosporin and tacrolimus
1.6. Prescribed use of anti-inflammatory drugs e.g. infliximab, vedoluzimab, golimumab, adolimubab
1.7. Regular use of non-steroidal anti-inflammatory drugs (NSAIDs)
2. Factors which may confound impact of prebiotic supplementation
2.1. Use of antibiotics four weeks prior to starting intervention
2.2. Use of prebiotics or probiotics (in other food products or as supplements) four weeks prior to starting intervention
2.3. Bowel preparation for a diagnostic procedure e.g. colonoscopy four weeks prior to starting intervention
2.4. Regular use of other supplements/medications that may affect the luminal microenvironment of the intestine (e.g. Orlistat, Lactulose)
Recruitment start date
29/11/2016
Recruitment end date
30/08/2017
Locations
Countries of recruitment
United Kingdom
Trial participating centre
Guy's Hospital
Guy's and St Thomas' NHS Foundation Trust
Great Maze Pond
London
SE1 9RT
United Kingdom
Trial participating centre
The Royal London Hospital
Whitechapel Road
London
E1 1BB
United Kingdom
Funders
Funder type
Industry
Funder name
Clasado Ltd
Alternative name(s)
Funding Body Type
Funding Body Subtype
Location
Funder name
King's College London, Diabetes and Nutritional Sciences Division
Alternative name(s)
Funding Body Type
Funding Body Subtype
Location
Results and Publications
Publication and dissemination plan
Planned publication in a high-impact peer reviewed journal.
IPD Sharing plan:
The current data sharing plans for the current study are unknown and will be made available at a later date.
Intention to publish date
31/10/2018
Participant level data
To be made available at a later date
Results - basic reporting
Publication summary