RESUMO
Introduction: Autism spectrum disorder (ASD) is a heterogeneous group of neurodevelopmental Q8 conditions characterized by deficits in social interaction/communication and restrictive/repetitive behaviors. Recent studies highlight the role of immune system dysfunction and inflammation in ASD pathophysiology. Indeed, elevated levels of pro-inflammatory cytokines were described in the brain and peripheral blood of ASD individuals. Despite this, how this pro-inflammatory profile evolves with aging and whether it may be associated with behavioral deficits is unknown. In this work, we explored the impact of aging on motor behavior and inflammation using Shank3b mutant mice, a model for syndromic ASD. Methods: Using RT-qPCR and flow cytometry, we examined the expression of key pro-inflammatory molecules in the cerebellum, bone marrow, spleen, and peripheral blood, comparing adult and old Shank3b +/+, Shank3b +/-, and Shank3b -/- mice. Results and discussion: Our findings revealed genotype- and age-related differences in inflammation and motor behavior, with Shank3b-/- mice exhibiting accelerated aging and motor impairments. Correlations between pro-inflammatory molecules and behavioral deficits suggest that a link may be present between systemic inflammation and ASD-related behaviors, underscoring the potential role of age-related inflammation ("inflammaging") in exacerbating ASD symptoms.
Assuntos
Envelhecimento , Transtorno do Espectro Autista , Modelos Animais de Doenças , Inflamação , Proteínas dos Microfilamentos , Proteínas do Tecido Nervoso , Animais , Transtorno do Espectro Autista/genética , Transtorno do Espectro Autista/imunologia , Proteínas do Tecido Nervoso/genética , Camundongos , Envelhecimento/imunologia , Envelhecimento/genética , Inflamação/imunologia , Inflamação/genética , Proteínas dos Microfilamentos/genética , Camundongos Knockout , Masculino , Camundongos Endogâmicos C57BL , Sistema Imunitário/imunologia , Sistema Imunitário/metabolismo , Citocinas/metabolismo , Comportamento AnimalRESUMO
Immune system dysfunction has been described in autism spectrum disorder. Here we tested the hypothesis that cerebellar defects are accompanied by immune dysfunction in adult mice lacking the autism-candidate gene Engrailed 2 (En2). Gene ontology analyses revealed that biological processes related to immune function were over-represented in the cerebellar transcriptome of En2-/- mice. Pro-inflammatory molecules and chemokines were reduced in the En2-/- cerebellum compared to controls. Conversely, pro-inflammatory molecules were increased in the peripheral blood of mutant mice. Our results suggest a link between immune dysfunction and cerebellar defects detected in En2-/- mice.