Involvement of intestinal dysbiosis in the etiopathogenesis and treatment of autism spectrum disorder: a bibliographic review
*Correspondencia: Dr. Matias Real López. Unidad Predepartamental de Medicina. Facultad de Ciencias de la Salud. Universitat Jaume I. Av. de Vicent Sos Baynat, s/n. E-12071 Castelló de la Plana. E-mail: mreal@uji.es
Introduction: Autism spectrum disorder is a neurodevelopmental disorder with phenotypic heterogeneity and variable symptomatic course of partly unknown etiology. The prevalence of gastrointestinal disorders in autism leads to investigate the role that intestinal microbiota may have as a causal factor and to propose specific therapeutic interventions. The role of microbiota in brain development and function, demonstrated in animal models, justifies its investigation in this neuropsychiatric disorder.
Objective: The aim was to investigate the relationship between altered microbiota composition and autism spectrum disorder, and to assess the therapeutic role of prebiotics, probiotics and fecal transplantation in this neurodevelopmental disorder.
Development: A literature review was conducted in PubMed, Cochrane Library and Google Scholar to select relevant articles related to the topic that were published between January 2012 and April 2020. Thirty-five relevant articles were selected. In 23 of them, significant differences were found in the composition and diversity of the microbiota in children with ASD, as well as in the biomolecules involved in certain metabolic pathways. The other 12 investigations reported gastrointestinal and behavioral improvements after therapeutic intervention.
Conclusions: It is reasonable to state that there is enough evidence to support the existence of a relationship between intestinal microbiota and autism spectrum disorders. This fact should be explored in depth to assess the etiopathogenic burden of dysbiosis and the possible therapeutic tools.
Objetivo Investigar la relación entre la alteración en la composición de la microbiota y el trastorno del espectro autista, y evaluar el papel terapéutico de prebióticos, probióticos y trasplante fecal en este trastorno del neurodesarrollo.
Desarrollo Se realizó una revisión bibliográfica en PubMed, Cochrane Library y Google Scholar con el fin de seleccionar los artículos relevantes relacionados con el tema que se publicaron entre enero de 2012 y abril de 2020. Se seleccionaron 35 artículos relevantes. En 23 de ellos se encontraron diferencias significativas en la composición y la diversidad de la microbiota en niños con TEA, así como en biomoléculas involucradas en determinadas rutas metabólicas. Las otras 12 investigaciones describieron mejorías gastrointestinales y comportamentales tras la intervención terapéutica.
Conclusiones Resulta razonable afirmar que existe evidencia suficiente para apoyar la existencia de una relación entre la microbiota intestinal y los trastornos del espectro autista. Esta vinculación ha de ser explorada en profundidad para perfilar el peso etiopatogénico de la disbiosis y las posibles herramientas terapéuticas.