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The Role of Gut Microbiota-Brain Axis in Pathophysiology of Adhd: A Systematic Review Publisher Pubmed



Shirvanirad S1, 2 ; Ejtahed HS1 ; Ettehad Marvasti F1 ; Taghavi M1 ; Sharifi F1 ; Arzaghi SM1 ; Larijani B1
Authors

Source: Journal of Attention Disorders Published:2022


Abstract

Objective: The main goal of this systematic review is to summarize evidences regarding alterations of microbial composition in ADHD cases and uncover underlying mechanisms. Methods: A comprehensive search was conducted on PubMed, Web of Science, and Scopus databases up to March 2021. All the observational studies including case-control, cross-sectional, and cohorts investigating the correlations between the gut microbiota and ADHD in both adults and children were included. Results: We found eight eligible studies. Enterococcus, Bifidobacterium, and Odoribacter were increased which may lead to impaired dopamine related functions in CNS. Moreover, decrease of Faecalibacterium frequency in ADHD could result in higher permeability and crossing of inflammatory cytokines. Regarding the short chain fatty acids-producing bacteria, Ruminococcaceae family decreased and Bacteroides uniformis and Bacteroides ovatus species increased. Conclusion: Gut microbiota correlation with ADHD and its underlying mechanisms could open new windows for developing novel therapies of ADHD by manipulating microbiota. © ©The Author(s) 2022.
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