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Current Alzheimer Research


ISSN (Print): 1567-2050
ISSN (Online): 1875-5828

Research Article

Probiotic Supplementation in Patients with Alzheimer’s Dementia - An Explorative Intervention Study

Author(s): Friedrich Leblhuber, Kostja Steiner, Burkhard Schuetz, Dietmar Fuchs* and Johanna M. Gostner

Volume 15, Issue 12, 2018

Page: [1106 - 1113] Pages: 8

DOI: 10.2174/1389200219666180813144834

open access plus


Background: Dysbiosis of intestinal microbiota in the elderly can cause a leaky gut, which may result in silent systemic inflammation and promote neuroinflammation - a relevant pathomechanism in the early course of Alzheimer’s disease.

Objective: The rebalancing of the microbiome could benefically impact on gut inflammation and immune activation.

Methods: In this study, routine laboratory tests in twenty outpatients (9 females, 11 males, aged 76.7 ± 9.6 years) with Alzheimer’s disease were investigated. The mean Mini Mental State Examination score was 18.5 ± 7.7. Biomarkers of immune activation – serum neopterin and tryptophan breakdown - as well as gut inflammation markers and microbiota composition in fecal specimens were analyzed in 18 patients before and after probiotic supplementation for 4 weeks.

Results: After treatment a decline of fecal zonulin concentrations and an increase in Faecalibacterium prausnitzii compared to baseline were observed. At the same time, serum kynurenine concentrations increased (p <0.05). Delta values (before - after) of neopterin and the kynurenine to tryptophan ratios (Kyn/Trp) correlated significantly (p <0.05).

Conclusion: Results show that the supplementation of Alzheimer’s disease patients with a multispecies probiotic influences gut bacteria composition as well as tryptophan metabolism in serum. The correlation between Kyn/Trp and neopterin concentrations points to the activation of macrophages and/or dendritic cells. Further studies are warranted to dissect the potential consequences of Probiotic supplementation in the course of Alzheimer’s disease.

Keywords: Gut microbiota, Faecalibacterium prausnitzii, probiotics, neopterin, brain-gut axis, neuroinflammation, Alzheimer`s disease, dementia.

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