Innate Immunity Associated with Inflammatory Responses and Cytokine Production against Common Dietary Proteins in Patients with Autism Spectrum DisorderJyonouchi H. · Sun S. · Itokazu N.
Department of Pediatrics, University of Minnesota, Minneapolis, Minn., USA
Objectives: Children with autism spectrum disorder (ASD) frequently reveal various gastrointestinal (GI) symptoms that may resolve with an elimination diet along with apparent improvement of some of the behavioral symptoms. Evidence suggests that ASD may be accompanied by aberrant (inflammatory) innate immune responses. This may predispose ASD children to sensitization to common dietary proteins (DP), leading to GI inflammation and aggravation of some behavioral symptoms. Methods: We measured IFN-γ, IL-5, and TNF-α production against representative DPs [gliadin, cow’s milk protein (CMP), and soy] by peripheral blood mononuclear cells (PBMCs) from ASD and control children [those with DP intolerance (DPI), ASD siblings, and healthy unrelated children]. We evaluated the results in association with proinflammatory and counter-regulatory cytokine production with endotoxin (LPS), a microbial product of intestinal flora and a surrogate stimulant for innate immune responses. Results: ASD PBMCs produced elevated IFN-γ and TNF-α, but not IL-5 with common DPs at high frequency as observed in DPI PBMCs. ASD PBMCs revealed increased proinflammatory cytokine responses with LPS at high frequency with positive correlation between proinflammatory cytokine production with LPS and IFN-γ and TNF-α production against DPs. Such correlation was less evident in DPI PBMCs. Conclusion: Immune reactivity to DPs may be associated with apparent DPI and GI inflammation in ASD children that may be partly associated with aberrant innate immune response against endotoxin, a product of the gut bacteria.
© 2002 S. Karger AG, Basel
Number of Print Pages : 9
Number of Figures : 3, Number of Tables : 4, Number of References : 30
Neuropsychobiology (International Journal of Experimental and Clinical Research in Biological Psychiatry, Pharmacopsychiatry, Biological Psychology/Pharmacopsychology and Pharmacoelectroencephalography)
Founded 1975 by J. Mendlewicz (Brussels)
Official Journal of the International Pharmaco-EEG Society (IPEG)
Vol. 46, No. 2, Year 2002 (Cover Date: Released October 2002)
Journal Editor: J. Mendlewicz, Brussels; B. Saletu, Vienna; P. Netter, Giessen; W.M. Herrmann, Berlin
ISSN: 0302–282X (print), 1423–0224 (Online)
For additional information: http://www.karger.com/journals/nps