- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT06326918
Duodenal Microbiota in Functional Dyspepsia
The Difference of Duodenal Microbiota Between Patients With Functional Dyspepsia and Control: a Pilot Study
The goal of this observational study is to assess the type of duodenal microbiota and duodenal microbiome in in FD patients compared to control group. The main questions it aims to answer are:
- What are the differences in the type of duodenal microbiota and is there a difference in duodenal microbiome diversity between patients diagnosed with functional dyspepsia (FD) and the control group?
- Are there any significant variations in the composition and diversity of gut microbiota between patients with FD and the control group, considering the method of sample collection (duodenal brushing vs. duodenal biopsy)?
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Dyspepsia, a common GI disorder, affects a significant portion of the global population, with a prevalence as high as 66% in Thailand. Functional dyspepsia (FD) is characterized by no detectable structural abnormalities during endoscopic examinations and significantly impacts health-related quality of life. Dysregulation of the gut-brain axis is hypothesized to contribute to motility disorders, visceral hypersensitivity, and mucosal/immune function changes in FD.
Recent studies have characterized the microbiota of the duodenal mucosal-associated microbiome (MAM) in patients with functional dyspepsia (FD). However, duodenal microbiota in FD patients compared to healthy control remains unclear with conflicting results. The number of studies evaluating this is limited, and a well-designed study comparing the duodenal microbiota of patients with functional dyspepsia to control group will advance our understanding of the potential role of the microbiome in FD. Therefore, the aim of this study is to compare the duodenal microbiota of patients with FD and those without upper GI symptoms.
This study is pilot phase, cross-sectional and case-control study that aims to evaluate microbiota profile in patients with functional dyspepsia, compared to those without functional dyspepsia by using mucosal brush sampling and mucosal biopsy sampling.
Study protocol include Age, gender, BMI, smoking history, history of PPI use within 2 weeks, history of antibiotic use within 4 weeks, history of probiotic use within 4 weeks will be recorded in case record form.
After consent, standard EGD will be performed. The duodenal mucosa using mucosal brushing with sterile sheathed brush, duodenal mucosal biopsy by standard forceps biopsy will be done respectively. ㆍ The duodenal mucosal specimen will be keep in sterile tube and immediate keep in freezing at -80C (allow room temperature <2 hr) for 16sRNA sequencing analysis.
Study Type
Enrollment (Estimated)
Contacts and Locations
Study Contact
- Name: Chatpol Samuthpongtorn, MD
- Phone Number: +66813462108
- Email: csamuthpongtorn@gmail.com
Study Locations
-
-
-
Bangkok, Thailand, 10330
- Recruiting
- King Chulalongkorn Memorial Hospital
-
Contact:
- Rapat Pittayanon, MD
- Phone Number: +66813132112
- Email: rapat125@gmail.com
-
Contact:
- Chatpol Samuthpongtorn, MD
- Phone Number: +66813462108
- Email: csamuthpongtorn@gmail.com
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
- Adult
- Older Adult
Accepts Healthy Volunteers
Sampling Method
Study Population
Description
Inclusion Criteria:
Functional dyspepsia group 1.1 Patients who are 18 years old or more and exhibit at least one of the following four symptoms for the last 3 months, with symptom onset occurring at least 6 months prior to diagnosis.
1.1.1 Postprandial distress syndrome (symptoms occurring at least 3 days per week), including:
- Postprandial fullness and/or
- Early satiation 1.1.2 Epigastric pain syndrome (symptoms occurring at least 1 day per week), including:
- Epigastric pain and/or
- Epigastric burning 1.2 Participants undergo esophago-gastro duodenoscopy (EGD) to confirm the absence of any structural abnormalities.
Control group
- Patients with no or minimal upper GI symptoms (not match the criteria of FD) and current EGD appear normal or insignificant gastritis
- Age- and sex-matched to the functional dyspepsia (FD) patient group.
Exclusion Criteria:
- Participants with known organic causes of dyspepsia, including peptic ulcers, gastrointestinal malignancies, or inflammatory bowel disease
- Participants with a history of gastric or hepatobiliary surgery
- Participants who have taken antibiotics and probiotics (as supplements) within 4 weeks before the study
- Participants with significant systemic illnesses, including severe liver or kidney disease, immunodeficiency disorders, or autoimmune diseases
- Pregnant or breastfeeding participants
- Participants who are unable or unwilling to undergo endoscopic procedures for duodenal mucosa collection
- Participants who have taken PPI within 2 weeks before the study
Study Plan
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
Functional dyspepsia
|
Duodenal mucosal brushing will be performed at duodenal bulb.
Duodenal mucosal biopsy will be performed at duodenal bulb.
|
Control
|
Duodenal mucosal brushing will be performed at duodenal bulb.
Duodenal mucosal biopsy will be performed at duodenal bulb.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Specific microbial genus using mucosal brushing
Time Frame: Through study completion, estimated 1.5 years
|
The difference of specific duodenal microbiota between patients with functional dyspepsia (FD) and control.
|
Through study completion, estimated 1.5 years
|
Microbiome diversity using mucosal brushing
Time Frame: Through study completion, estimated 1.5 years
|
The difference of specific duodenal microbiome diversity between patients with functional dyspepsia (FD) and control.
|
Through study completion, estimated 1.5 years
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Specific microbial genus using mucosal biopsy
Time Frame: Through study completion, estimated 1.5 years
|
The difference of specific duodenal microbiota between patients with functional dyspepsia (FD) and control.
|
Through study completion, estimated 1.5 years
|
Microbiome diversity using mucosal biopsy
Time Frame: Through study completion, estimated 1.5 years
|
The difference of specific duodenal microbiome diversity between patients with functional dyspepsia (FD) and control.
|
Through study completion, estimated 1.5 years
|
Collaborators and Investigators
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- RP026
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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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