Cited by 69Autism Spectrum Disorder ResearchProbiotics and Fermented FoodsGut microbiota and health

A Randomized Controlled Trial into the Effects of Probiotics on Electroencephalography in Preschoolers with Autism

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Billeci, Lucia, Callara, Alejandro Luis, Guiducci, Letizia, Prosperi, Margherita, Morales, Maria Aurora, Calderoni, Sara, Muratori, Filippo, Santocchi, Elisa·2023·Autism

Abstract

Previous studies suggest that autism spectrum disorders are characterized by alterations in the microbiota–gut–brain axis. Probiotics may modify the composition and the functionality of the gut microbiota of autism spectrum disorder individuals, with possible cascading effects on brain function. In this study, we analyzed possible brain modifications induced by the administration of probiotics in 46 children with autism spectrum disorder using electroencephalography. A randomized 6-month controlled trial was performed. In subjects treated with probiotics, we observed a decrease of power in frontopolar regions in beta and gamma bands, and increased coherence in the same bands together with a shift in frontal asymmetry, which suggests a modification toward a typical brain activity. Electroencephalography measures were significantly correlated with clinical and biochemical measures. These findings support the importance of further investigations on probiotics’ benefits in autism spectrum disorder to better elucidate mechanistic links between probiotics supplementation and changes in brain activity. Lay abstract This study investigates the effects of a probiotic on preschoolers’ brain electrical activity with autism spectrum disorder. Autism is a disorder with an increasing prevalence characterized by an enormous individual, family, and social cost. Although the etiology of autism spectrum disorder is unknown, an interaction between genetic and environmental factors is implicated, converging in altered brain synaptogenesis and, therefore, connectivity. Besides deepening the knowledge on the resting brain electrical activity that characterizes this disorder, this study allows analyzing the positive central effects of a 6-month therapy with a probiotic through a randomized, double-blind placebo-controlled study and the correlations between electroencephalography activity and biochemical and clinical parameters. In subjects treated with probiotics, we observed a decrease of power in frontopolar regions in beta and gamma bands, and increased coherence in the same bands together with a shift in frontal asymmetry, which suggests a modification toward a typical brain activity. Electroencephalography measures were significantly correlated with clinical and biochemical measures. These findings support the importance of further investigations on probiotics’ benefits in autism spectrum disorder to better elucidate mechanistic links between probiotics supplementation and changes in brain activity.

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  • In the six-month probiotic trial in children with ASD, EEG changes were significantly correlated with both clinical and biochemical improvements.

    “These EEG changes were significantly correlated with both clinical and biochemical improvements, supporting the potential of probiotics to influence brain activity in ASD.”

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  1. Hotel A. C. P. Cordoba A. (2001). Health and nutritional properties of probiotics in food including powder milk with live lactic acid bacteria. Prevention, 5(1), 1– 10.
  2. Parracho H. M. R. T. Gibson G. R. Knott F. J. Bosscher D. Kleerebezem M. McCartney A. L. (2010). A double-blind, placebo-controlled, crossover-designed probiotic feeding study in children diagnosed with autistic spectrum disorders. International Journal of Probiotics and Prebiotics, 2, 69– 74.
  3. West R. Roberts E. Sichel L. Sichel J. (2013). Improvements in gastrointestinal symptoms among children with autism spectrum disorder receiving the Delpro® probiotic and immunomodulator formulation. Journal of Probiotics & Health, 1(2), 1– 6.

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Authors
Billeci, L., Callara, A. L., Guiducci, L., Prosperi, M., Morales, M. A., Calderoni, S., Muratori, F., & Santocchi, E.
Affiliations
  • Istituto di Fisiologia Clinica (IT)
  • University of Pisa (IT)
  • Fondazione Stella Maris (IT)
  • Azienda USL Toscana Nord Ovest (IT)
Corresponding author
Prosperi, Margherita
Venue
Autism
Published
2022-04-01
Volume
27
Issue
1
Pages
117-132
ISSN
  • 1362-3613 (ISSN-L)
  • 1461-7005
OpenAlex
W4220984359
Cited by
69
References
92
Citations by year
2026: 19 · 2025: 14 · 2024: 27 · 2023: 9
FWCI
6.45
Type
journal article
Language
en
Open access
Locations
  • Autism (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • CINECA IRIS Institutial research information system (University of Pisa) (submittedVersion, cc-by-nc)
Funders
  • IRCCS Fondazione Stella Maris (Ricerca Corrente, “5×1000” voluntary contributions)
  • Ministero della Salute (GR-2011-02348280)
  • Regione Toscana (GR-2011-02348280)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
Keywords
probiotics, autism spectrum disorder, preschool children, microbiota-gut-brain axis, EEG, brain electrical activity, beta band, gamma band, frontal alpha asymmetry, brain coherence, gut microbiota
MeSH terms
Autism Spectrum Disorder, Autistic Disorder, Brain, Electroencephalography, Humans, Probiotics

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