Pain, Sleep & Gut Microbiota

Status Recruiting

Clinical Trial Summary

The objective of this study in healthy volunteers is to evaluate whether the composition of the gut microbiota and sleep quality influence the susceptibility to develop peripheral and central sensitization of pain pathways. In two different experimental sessions, the following factors will be tested: the influence of the composition of the gut microbiota on the susceptibility to develop peripheral sensitization of nociceptors, and the susceptibility to develop central sensitization of pain pathways. To assess susceptibility to peripheral sensitization, a solution of capsaicin (the active component of chili pepper) will be applied to the skin to induce neurogenic inflammation produced by the release of substances from nociceptors at the peripheral level. This neurogenic inflammation is characterized by a transient redness of the skin that will be measured with an infrared camera. To evaluate the susceptibility to sensitization at the central level, a high frequency electrical stimulation will be applied to the skin. This stimulation induces an increase in sensitivity to mechanical stimulation secondary to central sensitization. The intensity, extent and duration of this mechanical hyperalgesia will therefore be used as a measure of susceptibility to central sensitization. A stool sample and a blood sample will be taken. These samples will be used to characterize the composition of the intestinal microbiota, as well as the metabolites produced by this microbiota. These analyses will allow a comparison of the composition of the microbiota and the metabolites in subjects with a tendency to develop low vs. high sensitization at the peripheral and central levels. Similarly, sleep quality and average sleep duration will be assessed using questionnaires and a measurement of the participant's activity using a wrist movement sensitive bracelet. This information will be used to assess whether some of the interindividual variability in developing peripheral or central sensitization might be related to differences in sleep quality. Finally, systemic inflammation could be a factor modulated by sleep and gut microbiota, influencing pain perception and susceptibility to sensitization. For this reason, systemic pro- and anti-inflammatory cytokines will be measured in the blood sample.

Clinical Trial Description

n/a

Study Design

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT05494983
Study type	Interventional
Source	Université Catholique de Louvain
Contact	Gwenaëlle Mievis, PhD Student
Phone	+32488451915
Email	gwenaelle.mievis@uclouvain.be
Status	Recruiting
Phase	N/A
Start date	July 4, 2022
Completion date	January 4, 2026

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

Pain, Sleep and Gut Microbiota

Clinical Trial Summary

Clinical Trial Description

Study Design

Related Conditions & MeSH terms