Functional DyspepsiaNCT00693407
Study of Endogenous Inhibitory Modulation During Gastric and Somatic Stimulation
A study testing gastric capsaicin with heterotopic stimulation/ distraction in people with Functional Dyspepsia, run by National University Hospital, Singapore at 2 sites in Singapore.
Trial summary
Visceral hypersensitivity as evidence of central sensory sensitization is evident in many patients with functional disorders such as functional dyspepsia (FD) and irritable bowel syndrome (IBS). Read more about this study
- Who is it for?
- Ages 18 to 70 yearsHealthy volunteers can take part
- Conditions the study is for
- Functional Dyspepsia
- What is being tested?
- gastric capsaicin with heterotopic stimulation/ distraction
- Type of treatment
- Pill or oral medicine, Surgery or procedure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 80 participants
- Where
- 2 sitesSingapore
- Study dates
- Sep 2008to Sep 2012
- Phase
- Interventional
- 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
Who may be able to join
- FD patients:
- Eighty male and female FD patients according to Rome III criteria (Drossman, 2006), aged 18 to 70 years, will be recruited from primary and secondary care via advertisements and our referral networks.
- FD discomfort or pain should be the most prominent symptom.
- Patients must have been off all FD and analgesic medication and any drugs potentially influencing sensory function for at least two weeks before study start and be able to remain off such medication for the duration of the study period.
- Healthy controls:
- Forty male and female healthy volunteers, aged 18 to 70 years without any gastrointestinal pathology or history of significant abdominal pain, bowel disorders, bloating or discomfort during the last 3 months will be recruited.
Who cannot join
- Exclusion criteria for both FD patients and healthy controls:
- Organic gastrointestinal or other significant systemic disease, including cardiovascular, dermatological, psychiatric, neurological and endocrine diseases. Patients with peptic ulcer scars are also excluded.
- Chronic or acute pain, except related to other functional syndromes (irritable bowel syndrome, chronic pelvic pain, fibromyalgia, migraine).
- H. pylori positive.
- Abdominal surgery, including gastric resection or cholecystectomy (except appendectomy)
- History of brain disease or brain surgery.
Show all 11Show fewer
- Ongoing treatment with any drugs or need for drugs (or complementary medication) within last 14 days.
- Treatment with any investigational drug during the preceding 30 days.
- Ingestion of spicy, chilli pepper containing meal, or use of capsaicin skin cream in last 48 hours before start of study or any study day.
- Pregnancy or lactation.
- No written informed consent obtained from subject.
Trial locations and contacts
2 sites in 1 country.
Singapore2 sites
National University Hospital
Singapore, Singapore, 119074
National University of Singapore
Singapore, Singapore, 119742
About this study
Official title: Activation of Endogenous Inhibitory Modulation During Gastric and Somatic Stimulation in Functional Dyspepsia Patients and Healthy Controls
Visceral hypersensitivity as evidence of central sensory sensitization is evident in many patients with functional disorders such as functional dyspepsia (FD) and irritable bowel syndrome (IBS). We recently demonstrated both somatic hypersensitivity and abnormal endogenous pain modulation in IBS, both of which indicate central sensitization as a crucial mechanism in IBS. Endogenous pain mechanisms regulate, fine-tune and integrate sensory and homeostatic, including neuroendocrine, immune, motor and autonomic nervous system processes. Hitherto, no studies have investigated the role endogenous pain modulation in FD. Abnormal modulation could explain several of the symptom complexes associated with FD and provide a rationale for exploration of new treatments.
The current study was designed to
- investigate the gastric sensitivity in FD patients and healthy controls during gastric capsaicin stimulation
- assess the endogenous pain inhibitory modulation system in FD patients and healthy controls during heterotopic stimulation
- Conditions
- Functional Dyspepsia
- Being tested
- gastric capsaicin with heterotopic stimulation/ distraction
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
gastric capsaicin with heterotopic stimulation/ distractionProcedure or surgery
The subjects are randomized to swallow either a capsaicin 0.50mg capsule or an identical placebo capsule with 100ml of water If after 15 minutes pain scores do not reach a minimum level of 30, a further double-blinded capsule of the same content will be swallowed with 100ml of water. This is repeated to a maximum of 8 capusles until pain with VAS >30 is reported.
| Study group | Role | What they receive |
|---|---|---|
| 1, FD patients | Experimental | Eighty male and female FD patients according to Rome III criteria (Drossman, 2006), aged 18 to 70 years, will be recruited from primary and secondary care via advertisements and our referral networks Receives: Procedure: gastric capsaicin with heterotopic stimulation/ distraction |
| 2,Healthy controls | Experimental | Forty male and female healthy volunteers, aged 18 to 70 years without any gastrointestinal pathology or history of significant abdominal pain, bowel disorders, bloating or discomfort during the last 3 months will be recruited. Receives: Procedure: gastric capsaicin with heterotopic stimulation/ distraction |
What is being measured
The primary outcome is the main question the study is designed to answer.
Differences between healthy controls and FD subjects in visceral pain scores.
Measured: within 2 hours of Capsaicin challenge
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted9 Jun 2008 (estimated)
- Study startSep 2008
- Primary completionSep 2011
- Study completionSep 2012
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Functional DyspepsiaStudies of the same condition, open and under way.
- More trials run by National University Hospital, SingaporeThe sponsor's other registered studies.
- 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
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Diagnosis
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Quadruple blind
- Who is masked
- Participant, Care provider, Investigator, Outcomes assessor
- Enrolment
- 80 participants (actual)
Sponsor and investigators
- Lead sponsor
- National University Hospital, Singapore
- Sponsor type
- University, hospital or other
- Collaborators
- NMRC, Singapore
- Responsible party
- Principal investigator, Medicine, National University Hospital, Singapore
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00693407
- Sponsor's protocol ID
- D/07/088
- Status last verified
- Jan 2014
- First submitted
- 5 Jun 2008
- Last updated
- 7 Jan 2014
- Results posted
- No
- Data monitoring committee
- Yes
Study at a glance
From the registry record, last updated by the sponsor on 7 Jan 2014. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Activation of Endogenous Inhibitory Modulation During Gastric and Somatic Stimulation in Functional Dyspepsia Patients and Healthy Controls
- ClinicalTrials.gov ID
- NCT00693407
- Acronym / sponsor ID
- D/07/088
- Conditions
- Functional Dyspepsia
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 80 participants (actual)
- Lead sponsor
- National University Hospital, SingaporeUniversity, hospital or other
- Collaborators
- NMRC, Singapore
- Study start
- Sep 2008
- Primary completion
- Sep 2011 (actual)
- Study completion
- Sep 2012 (actual)
- First posted
- 9 Jun 2008 (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.
Visceral hypersensitivity as evidence of central sensory sensitization is evident in many patients with functional disorders such as functional dyspepsia (FD) and irritable bowel syndrome (IBS). We recently demonstrated both somatic hypersensitivity and abnormal endogenous pain modulation in IBS, both of which indicate central sensitization as a crucial mechanism in IBS. Endogenous pain mechanisms regulate, fine-tune and integrate sensory and homeostatic, including neuroendocrine, immune, motor and autonomic nervous system processes. Hitherto, no studies have investigated the role endogenous pain modulation in FD. Abnormal modulation could explain several of the symptom complexes associated with FD and provide a rationale for exploration of new treatments.
The current study was designed to
- investigate the gastric sensitivity in FD patients and healthy controls during gastric capsaicin stimulation
- assess the endogenous pain inhibitory modulation system in FD patients and healthy controls during heterotopic stimulation
Study design
- Primary purpose
- Diagnosis
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Quadruple blind (participant, care provider, investigator, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| 1, FD patients | Experimental | Procedure: gastric capsaicin with heterotopic stimulation/ distractionEighty male and female FD patients according to Rome III criteria (Drossman, 2006), aged 18 to 70 years, will be recruited from primary and secondary care via advertisements and our referral networks |
| 2,Healthy controls | Experimental | Procedure: gastric capsaicin with heterotopic stimulation/ distractionForty male and female healthy volunteers, aged 18 to 70 years without any gastrointestinal pathology or history of significant abdominal pain, bowel disorders, bloating or discomfort during the last 3 months will be recruited. |
Who may qualify
- Ages
- 18 to 70 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (6 listed)
- Eighty male and female FD patients according to Rome III criteria (Drossman, 2006), aged 18 to 70 years, will be recruited from primary and secondary care via advertisements and our referral networks.
- FD discomfort or pain should be the most prominent symptom.
- Patients must have been off all FD and analgesic medication and any drugs potentially influencing sensory function for at least two weeks before study start and be able to remain off such medication for the duration of the study period.
- Forty male and female healthy volunteers, aged 18 to 70 years without any gastrointestinal pathology or history of significant abdominal pain, bowel disorders, bloating or discomfort during the last 3 months will be recruited.
Key exclusion criteria (11 listed)
- Organic gastrointestinal or other significant systemic disease, including cardiovascular, dermatological, psychiatric, neurological and endocrine diseases. Patients with peptic ulcer scars are also excluded.
- Chronic or acute pain, except related to other functional syndromes (irritable bowel syndrome, chronic pelvic pain, fibromyalgia, migraine).
- H. pylori positive.
- Abdominal surgery, including gastric resection or cholecystectomy (except appendectomy)
- History of brain disease or brain surgery.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| gastric capsaicin with heterotopic stimulation/ distractionThe subjects are randomized to swallow either a capsaicin 0.50mg capsule or an identical placebo capsule with 100ml of water If after 15 minutes pain scores do not reach a minimum level of 30, a further double-blinded capsule of the same content will be swallowed with 100ml of water. This is repeated to a maximum of 8 capusles until pain with VAS >30 is reported. | Procedure or surgery | 1, FD patients, 2,Healthy controls |
Primary outcome
Differences between healthy controls and FD subjects in visceral pain scores.
Time frame: within 2 hours of Capsaicin challenge
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 7 Jan 2014.
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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.
The record lists no contact. Use the official record to reach the sponsor.
2 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing gastric capsaicin with heterotopic stimulation/ distraction in people with Functional Dyspepsia, run by National University Hospital, Singapore at 2 sites in Singapore.
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 6 inclusion and 11 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 7 Jan 2014. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 2 sites in Singapore. 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?
Differences between healthy controls and FD subjects in visceral pain scores. (time frame: within 2 hours of Capsaicin challenge). 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 7 Jan 2014.