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Your journey
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More info
You can access this
clinical trial
if you have
Esophageal Sensitivity
and you are
between 18 and 60
years old
The phase for this study is not defined.
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The purpose

Esophageal hypersensitivity is considered an important pathophysiological mechanism in patients suffering form non-erosive gastro-esophageal reflux disease. Serotonin (5-HT) is predominantly found in the central nervous system and in the gastro-intestinal (GI) tract. 5-HT plays a major role in the regulation of GI secretion, motility and sensitivity, and has been associated with emotion regulation. Acute tryptophan depletion (ATD) temporarily reduces the availability of tryptophan (TRP), thereby decreasing central and peripheral 5-HT synthesis. From previous studies, ATD is known to affect GI physiology and enhance visceral pain perception in the colon. The aim of the study was to investigate the effect of ATD on esophageal sensitivity in healthy volunteers (HV). Esophageal multimodal sensitivity was assessed after intragastric infusion of an amino-acid mixture (AA-mix) containing 15 AAs with TRP (control condition) or without TRP (ATD condition). After an incubation period of 5 hours, a probe with a polyurethane bag was positioned in the distal esophagus. Thermal (recirculating a heated saline solution through the bag), mechanical (increasing bag volume), electrical (2 stimulation electrodes) and chemical sensitivity (modified Bernstein) were tested and at 3 time points blood samples were collected for biochemical analysis. General mood was assessed by the Positive and Negative Affect Schedule (PANAS) and the State-Trait Anxiety Inventory (STAI) questionnaires.

Provided treatments

  • : Acute tryptophan depletion
  • : Placebo
  • Device: Multimodal stimulation probe

Locations near you

Unfortunately, there are no recruiting locations near you. Please check the list with all locations below.
Tris trial is registered with FDA with number: NCT03017768. The sponsor of the trial is Universitaire Ziekenhuizen Leuven and it is looking for 15 volunteers for the current phase.
Official trial title:
The Effect of Acute Tryptophan Depletion (ATD) on Esophageal Sensitivity in Healthy Volunteers: a Randomized, Single-blind, Placebo-controlled Study