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Brain Behav Immun. 2015 Aug;48:258-64. doi: 10.1016/j.bbi.2015.04.003. Epub 2015 Apr 7.

A randomized controlled trial to test the effect of multispecies probiotics on cognitive reactivity to sad mood.

Author information

  • 1Leiden University, Institute for Psychological Research, Cognitive Psychology, Wassenaarseweg 52, 2333 AK Leiden, The Netherlands; Leiden Institute for Brain and Cognition, P.O. Box 9600, 2300 RC Leiden, The Netherlands. Electronic address: L.Steenbergen@fsw.leidenuniv.nl.
  • 2Leiden University, Institute for Psychological Research, Cognitive Psychology, Wassenaarseweg 52, 2333 AK Leiden, The Netherlands; Leiden Institute for Brain and Cognition, P.O. Box 9600, 2300 RC Leiden, The Netherlands. Electronic address: R.Sellaro@fsw.leidenuniv.nl.
  • 3Winclove Probiotics, Hulstweg 11, 1032 LB Amsterdam, The Netherlands. Electronic address: S.vanHemert@winclove.nl.
  • 4University of Amsterdam, Psychology Department, Clinical Psychology, Weesperplein 4, 1018 XA Amsterdam, The Netherlands. Electronic address: J.A.Bosch@uva.nl.
  • 5Leiden University, Institute for Psychological Research, Cognitive Psychology, Wassenaarseweg 52, 2333 AK Leiden, The Netherlands; Leiden Institute for Brain and Cognition, P.O. Box 9600, 2300 RC Leiden, The Netherlands. Electronic address: Colzato@fsw.leidenuniv.nl.

Abstract

BACKGROUND:

Recent insights into the role of the human microbiota in cognitive and affective functioning have led to the hypothesis that probiotic supplementation may act as an adjuvant strategy to ameliorate or prevent depression.

OBJECTIVE:

Heightened cognitive reactivity to normal, transient changes in sad mood is an established marker of vulnerability to depression and is considered an important target for interventions. The present study aimed to test if a multispecies probiotic containing Bifidobacterium bifidum W23, Bifidobacterium lactis W52, Lactobacillus acidophilus W37, Lactobacillus brevis W63, Lactobacillus casei W56, Lactobacillus salivarius W24, and Lactococcus lactis (W19 and W58) may reduce cognitive reactivity in non-depressed individuals.

DESIGN:

In a triple-blind, placebo-controlled, randomized, pre- and post-intervention assessment design, 20 healthy participants without current mood disorder received a 4-week probiotic food-supplement intervention with the multispecies probiotics, while 20 control participants received an inert placebo for the same period. In the pre- and post-intervention assessment, cognitive reactivity to sad mood was assessed using the revised Leiden index of depression sensitivity scale.

RESULTS:

Compared to participants who received the placebo intervention, participants who received the 4-week multispecies probiotics intervention showed a significantly reduced overall cognitive reactivity to sad mood, which was largely accounted for by reduced rumination and aggressive thoughts.

CONCLUSION:

These results provide the first evidence that the intake of probiotics may help reduce negative thoughts associated with sad mood. Probiotics supplementation warrants further research as a potential preventive strategy for depression.

Copyright © 2015 The Authors. Published by Elsevier Inc. All rights reserved.

KEYWORDS:

Cognitive reactivity; Depression; Probiotics

PMID:
25862297
[PubMed - indexed for MEDLINE]
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