Cette page a été traduite automatiquement et l'exactitude de la traduction n'est pas garantie. Veuillez vous référer au version anglaise pour un texte source.

Lactic Acid Bacteria in Functional Diarrheal Disorders

29 octobre 2026 mis à jour par: Szeged University

Efficacy of Lactic Acid Bacteria in Managing Diarrhea-Associated Functional Gastrointestinal Disorders: A Randomized Controlled Trial

The goal of this clinical trial is to learn whether a probiotic supplement can improve symptoms and quality of life in adults with diarrhea-predominant irritable bowel syndrome (IBS-D) or functional diarrhea (FD). These conditions can cause frequent loose stools, abdominal discomfort, and a lower quality of life.

The main questions this study aims to answer are:

  • Does the probiotic improve quality of life compared with a placebo (a look-alike capsule that contains no active bacteria)?
  • Does the probiotic help participants have more normal stool consistency and fewer bowel movements?
  • Is the probiotic safe and well tolerated in people with IBS-D or FD?

Researchers will compare the probiotic supplement with a placebo to see whether the probiotic improves symptoms and quality of life.

Participants will:

  • Take either the probiotic or placebo capsule once daily for 3 months.
  • Switch to the other study treatment for an additional 3 months.
  • Complete quality-of-life questionnaires at the start of the study, after 3 months, and after 6 months.
  • Record the number of bowel movements each day throughout the study.
  • Record stool consistency each day using the Bristol Stool Form Scale.
  • Record daily pain during bowel movements using a Visual Analog Scale (VAS).
  • Report any medications they take and any health problems that occur during the study.

The study will follow each participant for 6 months. Researchers hope the results will help determine whether this probiotic is a useful treatment option for people living with IBS-D or functional diarrhea.

Aperçu de l'étude

Statut

Recrutement

Les conditions

Intervention / Traitement

Type d'étude

Interventionnel

Inscription (Estimé)

100

Phase

  • N'est pas applicable

Contacts et emplacements

Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.

Coordonnées de l'étude

Lieux d'étude

Critères de participation

Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.

Critère d'éligibilité

Âges éligibles pour étudier

18 ans et plus (Adulte, Adulte plus âgé)

Accepte les volontaires sains

Non

Sexes éligibles pour l'étude

Tout

La description

Inclusion Criteria:

  • Adults aged 18 years or older.
  • Have diarrhea-predominant irritable bowel syndrome (IBS-D) or functional diarrhea (FD) diagnosed using Rome V criteria.
  • Have had symptoms for at least 6 months.
  • Have no warning signs that suggest another digestive disease.
  • Have been taking the same treatment for IBS-D, FD, and other medical conditions for at least 1 month before joining the study.
  • Are willing and able to provide written informed consent and follow study procedures.

Exclusion Criteria:

  • Took antibiotics or probiotic products within the past 4 weeks.
  • Had abdominal surgery in the past, except appendix removal (appendectomy).
  • Have another type of irritable bowel syndrome or another functional digestive disorder.
  • Have a known digestive disease that may explain their symptoms.
  • Plan to start a new medication or change the dose of an existing medication during the study (except antispasmodic medications).
  • Are unable or unwilling to complete study questionnaires and daily symptom records.

Plan d'étude

Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.

Comment l'étude est-elle conçue ?

Détails de conception

  • Objectif principal: Traitement
  • Répartition: Randomisé
  • Modèle interventionnel: Affectation croisée
  • Masquage: Tripler

Armes et Interventions

Groupe de participants / Bras
Intervention / Traitement
Expérimental: Experimental First Arm

Participants randomized to this arm will receive LL1500, a probiotic supplement containing Lactobacillus rhamnosus and Lactobacillus plantarum, once daily for 3 months, followed by crossover to matching placebo for an additional 3 months under double-blind conditions.
Complément alimentaire: LL1500

LL1500 is an oral probiotic supplement administered once daily as a gelatin capsule. Each capsule contains lyophilized Lactobacillus rhamnosus and Lactobacillus plantarum, providing at least 7.5 × 10⁹ colony-forming units (CFU) of each bacterial strain. Participants will receive LL1500 for a 3-month treatment period.

Autre: Placebo Capsule

Matching oral placebo administered once daily as a gelatin capsule containing inactive excipients and no live bacterial strains. Participants will receive placebo for a 3-month treatment period.
Comparateur placebo: Placebo First Arm

Participants randomized to this arm will receive matching placebo once daily for 3 months, followed by crossover to LL1500, a probiotic supplement containing Lactobacillus rhamnosus and Lactobacillus plantarum, for an additional 3 months under double-blind conditions.
Complément alimentaire: LL1500

LL1500 is an oral probiotic supplement administered once daily as a gelatin capsule. Each capsule contains lyophilized Lactobacillus rhamnosus and Lactobacillus plantarum, providing at least 7.5 × 10⁹ colony-forming units (CFU) of each bacterial strain. Participants will receive LL1500 for a 3-month treatment period.

Autre: Placebo Capsule

Matching oral placebo administered once daily as a gelatin capsule containing inactive excipients and no live bacterial strains. Participants will receive placebo for a 3-month treatment period.

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
Irritable Bowel Syndrome Quality of Life (IBS-QOL) Total Score at 3 Months
Délai: Three months after enrollment

IBS-specific quality of life assessed using the Irritable Bowel Syndrome Quality of Life (IBS-QOL) questionnaire. The IBS-QOL contains 34 items and yields a total score ranging from 0 to 100, with higher scores indicating better quality of life. The outcome measure is the change in total IBS-QOL score from baseline to 3 months.
Three months after enrollment

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Irritable Bowel Syndrome Quality of Life (IBS-QOL) Total Score at 6 Months
Délai: Six months after enrollment

IBS-specific quality of life assessed using the Irritable Bowel Syndrome Quality of Life (IBS-QOL) questionnaire. The IBS-QOL contains 34 items and yields a total score ranging from 0 to 100, with higher scores indicating better quality of life. The outcome measure is the change in total IBS-QOL score from baseline to 6 months.
Six months after enrollment
Mean Daily Stool Frequency at 3 Months
Délai: Three months after enrollment

Mean number of bowel movements per day recorded by participants. The outcome measure is the change in average daily stool frequency from baseline to 3 months. Lower values indicate fewer bowel movements.
Three months after enrollment
Mean Daily Stool Frequency at 6 Months
Délai: Six months after enrollment

Mean number of bowel movements per day recorded by participants. The outcome measure is the change in average daily stool frequency from baseline to 6 months. Lower values indicate fewer bowel movements.
Six months after enrollment
Mean Bristol Stool Form Scale Score at 3 Months
Délai: Three months after enrollment

Stool consistency assessed using the Bristol Stool Form Scale, which ranges from Type 1 (hard stools) to Type 7 (watery stools). Types 3 to 5 are considered normal stool consistency. The outcome measure is the change in mean Bristol Stool Form Scale score from baseline to 3 months.
Three months after enrollment
Mean Bristol Stool Form Scale Score at 6 Months
Délai: Six months after enrollment

Stool consistency assessed using the Bristol Stool Form Scale, which ranges from Type 1 (hard stools) to Type 7 (watery stools). Types 3 to 5 are considered normal stool consistency. The outcome measure is the change in mean Bristol Stool Form Scale score from baseline to 6 months.
Six months after enrollment

Autres mesures de résultats

Mesure des résultats
Description de la mesure
Délai
Defecation Pain Visual Analog Scale (VAS) Score at 3 Months
Délai: Three months after enrollment

Pain during defecation assessed daily using a Visual Analog Scale (VAS). Scores range from 0 to 10, where 0 indicates no pain and 10 indicates the worst imaginable pain. The outcome measure is the change in mean daily VAS score from baseline to 3 months.
Three months after enrollment
Defecation Pain Visual Analog Scale (VAS) Score at 6 Months
Délai: Six months after enrollment

Pain during defecation assessed daily using a Visual Analog Scale (VAS). Scores range from 0 to 10, where 0 indicates no pain and 10 indicates the worst imaginable pain. The outcome measure is the change in mean daily VAS score from baseline to 6 months.
Six months after enrollment
Treatment-Emergent Adverse Events
Délai: From enrollment through 6 months

Number of participants experiencing any adverse event reported during treatment with either the probiotic supplement or placebo. Adverse events will be collected throughout study participation.
From enrollment through 6 months

Collaborateurs et enquêteurs

C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.

Parrainer

Szeged University

Dates d'enregistrement des études

Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.

Dates principales de l'étude

Début de l'étude (Estimé)

1 novembre 2026

Achèvement primaire (Estimé)

1 novembre 2028

Achèvement de l'étude (Estimé)

1 novembre 2029

Dates d'inscription aux études

Première soumission

29 octobre 2026

Première soumission répondant aux critères de contrôle qualité

29 octobre 2026

Première publication (Réel)

4 novembre 2026

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

4 novembre 2026

Dernière mise à jour soumise répondant aux critères de contrôle qualité

29 octobre 2026

Dernière vérification

1 octobre 2026

Plus d'information

Termes liés à cette étude

Mots clés

Termes MeSH pertinents supplémentaires

Autres numéros d'identification d'étude

  • NNGYK/09884-2/2026

Plan pour les données individuelles des participants (IPD)

Prévoyez-vous de partager les données individuelles des participants (DPI) ?

OUI

Informations sur les médicaments et les dispositifs, documents d'étude

Étudie un produit pharmaceutique réglementé par la FDA américaine

Non

Étudie un produit d'appareil réglementé par la FDA américaine

Non

Ces informations ont été extraites directement du site Web clinicaltrials.gov sans aucune modification. Si vous avez des demandes de modification, de suppression ou de mise à jour des détails de votre étude, veuillez contacter register@clinicaltrials.gov. Dès qu'un changement est mis en œuvre sur clinicaltrials.gov, il sera également mis à jour automatiquement sur notre site Web .

S'abonner