- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04253652
Investigating the Effects of Iron on the Gastrointestinal Tract (GI-iron)
October 18, 2022 updated by: Dr Anthony Hobson, The Functional Gut Clinic
Many patients that are prescribed iron report gastrointestinal side effects.
This research project aims to investigate if the gastrointestinal symptoms of taking iron supplementation are related to changes in gases produced by bacteria in the gastrointestinal tract.
Study Overview
Status
Not yet recruiting
Conditions
Intervention / Treatment
Detailed Description
This study is a pre-post interventional, two armed prospective cohort study where patients who are newly diagnosed with iron deficiency anaemia are prescribed iron therapy (either oral iron supplements, 200mg capsules containing 65mg of iron 2-3 times daily, or intravenous iron 1000-1500mg) as part of their standard care.
Participants will be asked to provide breath samples and complete the IBS-SSS questionnaire at baseline and after 4 weeks of taking the iron therapy as part of their standard care.
A diary including stool consistency and frequency will also be completed by participants on a daily basis.
For further exploratory research, some participants from each the oral and IV iron arm will be asked to provide stool samples at baseline and 4-weeks post iron therapy to assess any microbiome changes in response to iron therapy.
Study Type
Observational
Enrollment (Anticipated)
155
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Contact
- Name: Anthony Hobson
- Phone Number: 01613027777
- Email: anthony@thefunctionalgutclinic.com
Study Contact Backup
- Name: Sarah Smith
- Phone Number: 01613027777
- Email: sarah.smith22@pgr.anglia.ac.uk
Study Locations
-
-
-
Sheffield, United Kingdom, S5 7AU
- Sheffield Teaching Hospitals
-
Contact:
- John Hebden
- Phone Number: 01142434343
-
-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years to 80 years (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Sampling Method
Non-Probability Sample
Study Population
100 oral iron participants 55 IV iron participants
Description
Inclusion Criteria:
- Written informed consent before participating in the study after being given a full description of the study and prior to any study-specific procedures being performed.
- Male or non-pregnant female and is age 18 years to 80 years.
- Can communicate well with the Investigator and to comply with the requirements for the entire study.
- Capacity to understand written English.
- New diagnosis iron-deficient anaemia.
- Prescribed IV iron therapy or oral iron supplementation which contains 65mg elemental iron, two or three times per day for a period of at least 1 month or, will receive 1000mg or 1500mg of intravenous iron, as part of their standard care.
- Participant agrees to wait until after taking baseline breath samples and completing the IBS-SSS questionnaire before starting their iron therapy.
- Participant agrees to follow pre-test diet for 24 hours before giving test sample.
- Participant agrees to refrain from strenuous physical activity on the day of the breath test.
- Refrain from smoking on the day of the breath test.
- Agree to complete an overnight fast on the night before the breath test. Food and drink must be withheld until after all breath test samples have been taken.
- No probiotics for 14 days before the breath test or during the study.
- Body mass index between 18.5 and 34.9kg/m2 (bounds included).
- Not antibiotics for 4-weeks before the start of the study or during the study
Exclusion Criteria:
- Using an opioid based medication.
- Antibiotics in the 4 weeks prior to enrolment.
- Colonoscopy/sigmoidoscopy in the 1 week prior to enrolment, unless they have taken their baseline breath sample and IBS-SSS questionnaire before completing the required bowel preparation.
- Diagnosis of any organic gastrointestinal disease, including inflammatory bowel disease, coeliac disease and diverticulitis.
- Mechanical obstruction of the GI tract.
- Participant is diabetic.
- Participant has any hepatic disease.
- Participant has any disease of the CNS.
- Participant is involved in this study as an Investigator, sub-Investigator, study coordinator, other study staff, or sponsor member.
- Previous abdominal or colorectal surgery except appendectomy, cholecystectomy, or hysterectomy.
- Participant has had iron therapy in the 12 months prior to enrollment.
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Observational Models: Cohort
- Time Perspectives: Prospective
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
Oral iron
These patients will have diagnosed with iron deficiency anaemia and been prescribed oral iron supplements as part of their treatment from their doctor.
This will be in accordance with the NICE guidelines; 200mg capsules containing 65mg elemental iron, 2-3 times a day for a period of atleast 1 month.
|
Will be completed pre and post iron therapy
Will be completed pre and post iron therapy
Monitoring stool form, consistency and frequency on a daily basis for 4 weeks
Completed pre and post iron therapy for a subset of patients enrolled in the study
|
Intravenous iron
These patients will have diagnosed with iron deficiency anaemia and been prescribed intravenous iron as part of their treatment from their doctor.
Participants will receive an infusion of either 1000mg or 1500mg
|
Will be completed pre and post iron therapy
Will be completed pre and post iron therapy
Monitoring stool form, consistency and frequency on a daily basis for 4 weeks
Completed pre and post iron therapy for a subset of patients enrolled in the study
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Breath
Time Frame: 4 weeks apart
|
Difference in methane levels in breath samples from baseline and 4-weeks since commencing iron therapy.
This will be measured in parts per million (ppm).
|
4 weeks apart
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Irritable Bowel Syndrome Symptom Severity Score (IBS-SSS)
Time Frame: 4 weeks apart
|
Comparison in change of IBS-SSS score from baseline to 4 weeks since commencing iron therapy.
The minimum score is 0 and maximum score is 500.
The greater the score, the worse the severity and frequency of symptoms of abdominal pain and distention, and increased dissatisfaction of overall bowel functioning.
|
4 weeks apart
|
Stool consistency
Time Frame: 4 weeks apart
|
Change in stool frequency and form according to the bristol stool chart and abdominal symptoms during the 4 weeks since commencing iron therapy.
|
4 weeks apart
|
Other Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Exploratory
Time Frame: 4 weeks apart
|
Qualitative and Quantitative data for faecal microorganisms at baseline and 4-weeks since commencing iron therapy.
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4 weeks apart
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Anticipated)
March 9, 2023
Primary Completion (Anticipated)
September 1, 2024
Study Completion (Anticipated)
December 1, 2024
Study Registration Dates
First Submitted
January 31, 2020
First Submitted That Met QC Criteria
February 3, 2020
First Posted (Actual)
February 5, 2020
Study Record Updates
Last Update Posted (Actual)
October 19, 2022
Last Update Submitted That Met QC Criteria
October 18, 2022
Last Verified
October 1, 2022
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- FGC19002
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
No
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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