Elobixibat Colonic Motor Function Study

Study Overview
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Brief Summary
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This is a randomized trial of 36 otherwise healthy patients with chronic idiopathic constipation. The purpose of the study is to compare the effects of daily single-dose oral elobixibat and placebo for 7 days on colonic motor effects.

Official Title
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A Single Center, Placebo-controlled Trial to Evaluate the Effects of Elobixibat in Colonic Motor Functions in Patients With Chronic Idiopathic Constipation

Conditions
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Chronic Idiopathic Constipation

Intervention / Treatment
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* Drug: elobixibat
* Drug: placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male or female 18-65 years of age Body Mass Index of 18-40 kg/m2 Diagnosis of constipation for 12 or more weeks with symptom onset at least 6 months prior to the diagnosis and insufficient criteria to fulfill a diagnosis of irritable bowel syndrome (IBS), as defined by the Rome III criteria for Functional Constipation Stable concomitant medications defined as no changes in regimen for at least 2 weeks prior to the trial period Exclusion Criteria: Structural or metabolic diseases/conditions that affect the gastrointestinal system, or functional gastrointestinal (GI) disorders. Use of drugs or agents within the past 2 weeks that alter GI transit including laxatives, magnesium or aluminum-containing antacids, prokinetics, erythromycin, narcotics, anticholinergics, tricyclic antidepressants, selective serotonin reuptake inhibitor and newer antidepressants Use of drugs or agents within the past 2 weeks that may add drowsiness and central nervous system (CNS) depression such as barbiturates, benzodiazepines, ethanol, lithium, opioids, buspirone, antihistamines, muscle relaxants, and other CNS depressants The patient has a history of bariatric surgery for treatment of obesity; surgery to remove a segment of the GI tract; or surgery of the abdomen, pelvic or retroperitoneal area during the 6 months prior to Screening; or appendectomy or cholecystectomy 3 months prior to screening; or other major surgery 1 month prior to Screening Clinical evidence (including physical exam) of clinically significant cardiovascular, respiratory, renal, hepatic, gastrointestinal, hematological, neurological, psychiatric, or other disease that interfere with the objectives of the trial. Any candidate participants with such disorder mentioned will be referred to their general physician The Hospital Anxiety and Depression Scale (HADS) will be used to exclude patients with significant affective disorders

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Basic Science
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Elobixibat 10 mg<br>elobixibat | Drug: elobixibat<br> <br> |
| Experimental: Elobixibat 15 mg<br>elobixibat | Drug: elobixibat<br> <br> |
| Experimental: Elobixibat 20 mg<br>elobixibat | Drug: elobixibat<br> <br> |
| Placebo Comparator: Placebo<br>placebo | Drug: placebo<br> <br> |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of postprandial High Amplitude Propagated Contractions (HAPCs) |  | At Day 7 | 
| Postprandial Colonic Tone |  | At Day 7 | 
| Change in postprandial tone relative to fasting |  | At Day 7 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Fasting colonic tone |  | At Day 7 | 
| Colonic sensation threshold for first sensation |  | At Day 7 | 
| Colonic sensation threshold for gas |  | At Day 7 | 
| Colonic sensation threshold for pain |  | At Day 7 | 
| Total 48h fecal bile acid excretion |  | At Day 4-6 |