Understanding Abdominal Pain in IBD and IBS

Inflammatory Bowel Diseases Clinical Trial

Official title: Exploring Biopsychosocial Mechanisms of Abdominal Pain in Inflammatory Bowel Disease and Irritable Bowel Syndrome

Status Recruiting

Clinical Trial Summary

Abdominal pain is a central symptom of Inflammatory Bowel Disease (IBD) and Irritable Bowel Syndrome (IBS). IBD is an autoimmune disease characterized by inflammation of the gastrointestinal tract. IBS does not have clear biomarkers and is diagnosed based on symptom reports. The aim of this study is to explore biopsychosocial factors which may perpetuate and/or increase the severity of pain in these conditions. The main focus will be on the role of top-down brain processes in the experience of abdominal pain.

Clinical Trial Description

It remains unclear why a large proportion of people with inflammatory bowel disease (IBD) report ongoing abdominal pain during remission or why people with irritable bowel syndrome (IBS) develop abdominal pain. One theory is that people with chronic pain have somehow grown more sensitive.

It is assumed that such heightened sensitivity depends both on bottom-up processing and top-down processing. Bottom-up processing refers to information that is relayed to the brain along so-called afferent fibres. Top-down processing refers to feedback provided by the brain to lower areas along efferent fibres.

The investigators will (1) measure the capacity of people to inhibit pain through top-down processing, (2) test if the human pain experience is enhanced due to sustained activation of certain afferents, and (3) assess to what extent people are impacted by psychosocial inhibition and activation factors. Results of people with IBS in remission will be compared with the results of two groups of people with IBD (those with pain and those without) and the investigators will explore if their measurements differentiate between groups.

It is hypothesized that (1) IBS patients and IBD patients with abdominal pain will be less able to inhibit their pain compared to IBD patients without abdominal pain (2) IBS patients and IBD patients with abdominal pain will score higher on psychosocial inhibition factors and lower on psychosocial activation factors when compared to IBD patients without abdominal pain. (3) In the total cohort, laboratory measures of pain inhibition will correlate with self-reported psychosocial inhibition and activation factors. (4) IBS patients and IBD patients with abdominal pain will show more temporal summation compared to IBD patients without abdominal pain. ;

Related Conditions & MeSH terms

• Abdominal Pain
• Inflammatory Bowel Diseases
• Intestinal Diseases
• Irritable Bowel Syndrome
• Syndrome

• NCT number: NCT04020835
• Study type: Observational
• Source: Guy's and St Thomas' NHS Foundation Trust
• Contact: Danielle Huisman
• Phone: +442071880188
• Email: danielle.huisman@kcl.ac.uk
• Status: Recruiting
• Start date: May 20, 2019
• Completion date: March 31, 2020