Unraveling the gut-brain connection: The association of microbiota-linked structural brain biomarkers with behavior and mental health

Oren Contreras-Rodriguez, Gerard Blasco, Carles Biarnés, Josep Puig, Maria Arnoriaga-Rodríguez, Clàudia Coll-Martinez, Jordi Gich, Lluís Ramió-Torrentà, Anna Motger-Albertí, Vicente Pérez-Brocal, Andrés Moya, Joaquim Radua*, José Manuel-Fernández-Real*

*Autor correspondiente de este trabajo

Producción científica: Contribución a una revistaArtículoInvestigaciónrevisión exhaustiva


Aim: The gut microbiota can influence human behavior. However, due to the massive multiple-testing problem, research into the relationship between microbiome ecosystems and the human brain faces drawbacks. This problem arises when attempting to correlate thousands of gut bacteria with thousands of brain voxels. Methods: We performed brain magnetic resonance imaging (MRI) scans on 133 participants and applied machine-learning algorithms (Ridge regressions) combined with permutation tests. Using this approach, we were able to correlate specific gut bacterial families with brain MRI signals, circumventing the difficulties of massive multiple testing while considering sex, age, and body mass index as confounding factors. Results: The relative abundance (RA) of the Selenomonadaceae, Clostridiaceae, and Veillonellaceae families in the gut was associated with altered cerebellar, visual, and frontal T2-mapping and diffusion tensor imaging measures. Conversely, decreased relative abundance of the Eubacteriaceae family was also linked to T2-mapping values in the cerebellum. Significantly, the brain regions associated with the gut microbiome were also correlated with depressive symptoms and attentional deficits. Conclusions: Our analytical strategy offers a promising approach for identifying potential brain biomarkers influenced by gut microbiota. By gathering a deeper understanding of the microbiota-brain connection, we can gain insights into the underlying mechanisms and potentially develop targeted interventions to mitigate the detrimental effects of dysbiosis on brain function and mental health.

Idioma originalInglés
Páginas (desde-hasta)339-346
Número de páginas8
PublicaciónPsychiatry and Clinical Neurosciences
Fecha en línea anticipada29 feb 2024
EstadoPublicada - jun 2024


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