Irritable Bowel Syndrome (IBS)NCT01787253
Microbe-Gut Interaction in Microscopic Colitis and Post-Infectious Irritable Bowel Syndrome (IBS)
An observational study of Irritable Bowel Syndrome (IBS), run by Örebro University, Sweden at 1 site in Sweden.
Trial summary
Objective: This study aims elucidate the pathophysiological link between the environment in the colon (mainly the microbiota), the local immune system and activation of the enteric nervous system in patients with post-infectious IBS (PI-IBS) and microscopic colitis (MC) with special emphasis on microbial-mucosa… Read more about this study
- Who is it for?
- Ages 18 to 70 yearsHealthy volunteers can take part
- Conditions the study is for
- Irritable Bowel Syndrome (IBS)
- How many people
- 125 participants
- Where
- 1 siteSweden
- Study dates
- Nov 2010to Dec 2014
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 70 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Study population: Patients will be recruited from clinic (endoskopimotagningen) at Örebro University Hospital.
Who may be able to join
- Over 18 years
- Healthy and not eating any prescription medication except birth control in pill form
Who cannot join
- Have or had a history of gastrointestinal disease that has required specialist medical care
- Being lactose intolerance
- Have high blood pressure requiring treatment
- Have premenstrual syndrome
- Lose Weight
- Being pregnant or breast-feed
Trial locations and contacts
1 site in 1 country.
About this study
Objective: This study aims elucidate the pathophysiological link between the environment in the colon (mainly the microbiota), the local immune system and activation of the enteric nervous system in patients with post-infectious IBS (PI-IBS) and microscopic colitis (MC) with special emphasis on microbial-mucosa interactions and evaluation of the effect on the immune activation/response as well as how afferent gut-brain signalling leads to abdominal discomfort.
Method: The project is based on data from three cohorts of patients, one with PI-IBS and one with MC as well as a gender- and age-matched cohort of healthy individuals. Measurement of perceived sensitivity in the gut will be evaluated by pain-response under mechanical stress using a barostat. The HIT (Human intestinal Tissue)-Chip array will be used to characterize the diversity, stability and functionality of the intestinal microbiota on mucosa level, giving a clue to the interactions with the host and insight to changes leading to the development of the two diseases.
Immunohistochemistry and flowcytometry will be used to analyse the location, frequency and phenotype characteristics of lymphoid- and mast cells. Functional analysis of mucosal lymphocytes activated in vitro by products from the intestinal microbiota will be examined by cytokine production using the LuminexTM system. The Ussing chamber technique will allow investigation of the impact of the microbiota and its metabolites on intestinal barrier functions. In this method the sample has access to stressors under standard conditions.
Read the detailed description
We will make a characterization of lymphocytes, mast cells and gut microflora. Depending on these results we will make stimulations of patient biopsies to find if tissue from patients react differently then patients from healthy.
- Conditions
- Irritable Bowel Syndrome (IBS)
- Medical subject headings
- Irritable Bowel Syndrome
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
| Study group | Role | What they receive |
|---|---|---|
| Irritable bowel syndrome (IBS) | Not described | |
| Healthy controls | Not described | |
| Microscopic Colitis (MC) | Not described | |
| Irritable bowel disease (IBD) | Not described |
What is being measured
The primary outcome is the main question the study is designed to answer.
Lymphocyte characterization
LPLs and IELs stained with the following flourochrome-conjugated antibodies: anti-CD3-FITC (clone-HIT3a), anti-CD4-FITC/PECy5 (clone-RPA-T4), anti-CD45RA-PE (clone-HI 100), anti-CD45RO-PECy5 (clone-UCHL1), anti-CD19-PE (clone-HIB19) and anti-CD138-FITC (clone-MI15), all from BD Pharmingen (San Diego, CA, USA). Anti-CD8α-ECD (clone-SFCI21Thy2D3) and anti-CD8β-PECy5 (clone-2ST8.5 H7) were purchased from Beckman Coulter (Fullerton, CA, USA) whereas anti-CD38-PECy5 (clone-HIT2), anti-αβTCR-PECy5 (clone-IP26) and anti-γδTCR-PE (clone-B1) were purchased from Biolegend (San Diego, CA, USA). Fluorochrome-conjugated isotype matched control antibodies were used as controls for non-specific staining, and were purchased from BD Pharmingen or Beckman Coulter (IgGκ-FITC, IgG2bκ-PE, IgG1-ECD, IgG2bκ-PECy5, IgG2κ-FITC, IgG1κ-PE, IgG1κ-PECy5, and IgG2a-PECy5).
Measured: After one year of initial infection before treatment
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted8 Feb 2013 (estimated)
- Study startNov 2010
- Primary completionMar 2014
- Study completionDec 2014
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Irritable Bowel Syndrome (IBS)Studies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Case-control
- Time perspective
- Prospective
- Enrolment
- 125 participants (actual)
Sponsor and investigators
- Lead sponsor
- Örebro University, Sweden
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Robert Brummer, Örebro University, Sweden
- Investigators
- Robert Brummer, MD, PhD, Principal investigator, Örebro Universitet
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01787253
- Sponsor's protocol ID
- 2010-05
- Other IDs
- 2010/261
- Status last verified
- Feb 2021
- First submitted
- 15 Nov 2010
- Last updated
- 24 Feb 2021
- Results posted
- No
- Data monitoring committee
- No
Study at a glance
From the registry record, last updated by the sponsor on 24 Feb 2021. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Microbe-Gut Interaction in Microscopic Colitis and Post-Infectious Irritable Bowel Syndrome (IBS)
- ClinicalTrials.gov ID
- NCT01787253
- Acronym / sponsor ID
- 2010-05
- Conditions
- Irritable Bowel Syndrome (IBS)
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 125 participants (actual)
- Lead sponsor
- Örebro University, SwedenUniversity, hospital or other
- Study start
- Nov 2010 (actual)
- Primary completion
- Mar 2014 (actual)
- Study completion
- Dec 2014 (actual)
- First posted
- 8 Feb 2013 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Objective: This study aims elucidate the pathophysiological link between the environment in the colon (mainly the microbiota), the local immune system and activation of the enteric nervous system in patients with post-infectious IBS (PI-IBS) and microscopic colitis (MC) with special emphasis on microbial-mucosa interactions and evaluation of the effect on the immune activation/response as well as how afferent gut-brain signalling leads to abdominal discomfort.
Method: The project is based on data from three cohorts of patients, one with PI-IBS and one with MC as well as a gender- and age-matched cohort of healthy individuals. Measurement of perceived sensitivity in the gut will be evaluated by pain-response under mechanical stress using a barostat. The HIT (Human intestinal Tissue)-Chip array will be used to characterize the diversity, stability and functionality of the intestinal microbiota on mucosa level, giving a clue to the interactions with the host and insight to changes leading to the development of the two diseases.
Immunohistochemistry and flowcytometry will be used to analyse the location, frequency and phenotype characteristics of lymphoid- and mast cells. Functional analysis of mucosal lymphocytes activated in vitro by products from the intestinal microbiota will be examined by cytokine production using the LuminexTM system. The Ussing chamber technique will allow investigation of the impact of the microbiota and its metabolites on intestinal barrier functions. In this method the sample has access to stressors under standard conditions.
Detailed description
We will make a characterization of lymphocytes, mast cells and gut microflora. Depending on these results we will make stimulations of patient biopsies to find if tissue from patients react differently then patients from healthy.
Study design
- Observational model
- Case-control
- Time perspective
- Prospective
- Number of arms
- 4
| Arm | Type | Receives |
|---|---|---|
| Irritable bowel syndrome (IBS) | – | – |
| Healthy controls | – | – |
| Microscopic Colitis (MC) | – | – |
| Irritable bowel disease (IBD) | – | – |
Who may qualify
- Ages
- 18 to 70 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- Patients will be recruited from clinic (endoskopimotagningen) at Örebro University Hospital.
Key inclusion criteria (2 listed)
- Over 18 years
- Healthy and not eating any prescription medication except birth control in pill form
Key exclusion criteria (6 listed)
- Have or had a history of gastrointestinal disease that has required specialist medical care
- Being lactose intolerance
- Have high blood pressure requiring treatment
- Have premenstrual syndrome
- Lose Weight
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Lymphocyte characterization
Time frame: After one year of initial infection before treatment
LPLs and IELs stained with the following flourochrome-conjugated antibodies: anti-CD3-FITC (clone-HIT3a), anti-CD4-FITC/PECy5 (clone-RPA-T4), anti-CD45RA-PE (clone-HI 100), anti-CD45RO-PECy5 (clone-UCHL1), anti-CD19-PE (clone-HIB19) and anti-CD138-FITC (clone-MI15), all from BD Pharmingen (San Diego, CA, USA). Anti-CD8α-ECD (clone-SFCI21Thy2D3) and anti-CD8β-PECy5 (clone-2ST8.5 H7) were purchased from Beckman Coulter (Fullerton, CA, USA) whereas anti-CD38-PECy5 (clone-HIT2), anti-αβTCR-PECy5 (clone-IP26) and anti-γδTCR-PE (clone-B1) were purchased from Biolegend (San Diego, CA, USA). Fluorochrome-conjugated isotype matched control antibodies were used as controls for non-specific staining, and were purchased from BD Pharmingen or Beckman Coulter (IgGκ-FITC, IgG2bκ-PE, IgG1-ECD, IgG2bκ-PECy5, IgG2κ-FITC, IgG1κ-PE, IgG1κ-PECy5, and IgG2a-PECy5).
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 24 Feb 2021.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Robert Brummer, MD, PhD principal investigator
Örebro Universitet
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Irritable Bowel Syndrome (IBS), run by Örebro University, Sweden at 1 site in Sweden.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 24 Feb 2021. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Sweden. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Lymphocyte characterization (time frame: After one year of initial infection before treatment). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 24 Feb 2021.