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Gut Feeling: Understanding the Mechanisms Underlying the Antidepressant Properties of Probiotics

NCT03893162 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 50

Last updated 2022-06-30

No results posted yet for this study

Summary

Previous research has suggested that probiotics can improve depressive symptoms in patients with Major Depressive Disorder (MDD), particularly when used in addition to antidepressants. The aim of this exploratory pilot study is to improve the investigator's understanding of the mechanisms underlying these effects. This study will assess the effects of an 8-week double-blind placebo-controlled probiotic intervention on the gut microbiome, inflammatory marker levels, brain activity and neurotransmitter levels in patients with MDD and their relationship to changes in mood. This study will also recruit a group of demographically-matched healthy controls for gut microbiome comparison with the MDD group (non-interventional).

Conditions

Interventions

DIETARY_SUPPLEMENT

Multi-strain probiotic

The intervention in this study is a multi-strain probiotic which contains: Bacillus subtilis, Bifidobacterium bifidum, Bifidobacterium breve, Bifidobacterium infantis, Bifidobacterium longum, Lactobacillus acidophilus, Lactobacillus delbrueckii ssp. bulgaricus, Lactobacillus casei, Lactobacillus plantarum, Lactobacillus rhamnosus, Lactobacillus helveticus, Lactobacillus salivarius, Lactococcus lactis ssp. lactis, Streptococcus thermophilus. Each capsule contains minimum 2 billion live microorganisms per capsule, equivalent to 10 billion live microorganisms per gram.

OTHER

Placebo

Visually identical capsules in identical packaging containing no active bacteria.

Sponsors & Collaborators

Principal Investigators

  • James M Stone, MBBS PhD FRCPsych · Institute of Psychiatry Psychology and Neuroscience, King's College London

Study Design

Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
TRIPLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
55 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2019-07-01
Primary Completion
2022-06-29
Completion
2022-06-30

Countries

  • United Kingdom

Study Locations

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Entities

Diseases
Companies

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT03893162 on ClinicalTrials.gov