Abstract
Background: The evidence based supports that multifactorial and complex immune interactions play a role in autism spectrum disorders (ASD), but contradictory findings are also reported.
Objective: The aim of this selective review was to identify trends in the research literature on this topic, focusing on immunology and other aberrations with respect to the different ASD subtypes.
Methods: This selective review is based on original and review articles written in English and identified in literature searches of PubMed.
Results: Several studies have found that the risk of ASD is greater among children whose mothers suffered from autoimmune diseases while pregnant. Moreover, individuals with ASD show increased levels of antibodies that are specific for several specific proteins. Studies also show that mothers of children with ASD have antibodies against fetal brain proteins. There are also reports on the associations between increased levels of proinflammatory cytokines and ASD. Finally, infections in mothers during pregnancy are linked to an increased risk of ASD.
Conclusion: We propose that the large inconsistencies in findings among studies in the field are due to differences in subdiagnoses among the included children with ASD. Well-phenotyped ASD samples are needed to understand the biological and immunological mechanisms underpinning ASD and its subdiagnoses. Future research should apply new strategies to scrutinize the link between ASD and changes in immune responsivity. Important new research avenues are to investigate the associations (a) between different ASD phenotypes and aberrations in (auto)immune pathways and (b) between reduced natural regulatory autoimmune responses during pregnancy, which are in turn associated with increased oxidative and nitrosative stress in maternal blood and putative detrimental effects in the offspring.
Keywords: Autism spectrum disorders, immunology, autoimmunity, prenatal infections, cytokines, neurodevelopment.
CNS & Neurological Disorders - Drug Targets
Title:Role of the Immune System in Autism Spectrum Disorders (ASD)
Volume: 17 Issue: 7
Author(s): Heidi Ormstad*, Vesna Bryn, Ola Didrik Saugstad, Ola Skjeldal and Michael Maes
Affiliation:
- Faculty of Health and Social Sciences, University of Southeast Norway, P.O. Box 7053, NO-3007 Drammen,Norway
Keywords: Autism spectrum disorders, immunology, autoimmunity, prenatal infections, cytokines, neurodevelopment.
Abstract: Background: The evidence based supports that multifactorial and complex immune interactions play a role in autism spectrum disorders (ASD), but contradictory findings are also reported.
Objective: The aim of this selective review was to identify trends in the research literature on this topic, focusing on immunology and other aberrations with respect to the different ASD subtypes.
Methods: This selective review is based on original and review articles written in English and identified in literature searches of PubMed.
Results: Several studies have found that the risk of ASD is greater among children whose mothers suffered from autoimmune diseases while pregnant. Moreover, individuals with ASD show increased levels of antibodies that are specific for several specific proteins. Studies also show that mothers of children with ASD have antibodies against fetal brain proteins. There are also reports on the associations between increased levels of proinflammatory cytokines and ASD. Finally, infections in mothers during pregnancy are linked to an increased risk of ASD.
Conclusion: We propose that the large inconsistencies in findings among studies in the field are due to differences in subdiagnoses among the included children with ASD. Well-phenotyped ASD samples are needed to understand the biological and immunological mechanisms underpinning ASD and its subdiagnoses. Future research should apply new strategies to scrutinize the link between ASD and changes in immune responsivity. Important new research avenues are to investigate the associations (a) between different ASD phenotypes and aberrations in (auto)immune pathways and (b) between reduced natural regulatory autoimmune responses during pregnancy, which are in turn associated with increased oxidative and nitrosative stress in maternal blood and putative detrimental effects in the offspring.
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Cite this article as:
Ormstad Heidi *, Bryn Vesna , Saugstad Didrik Ola, Skjeldal Ola and Maes Michael , Role of the Immune System in Autism Spectrum Disorders (ASD), CNS & Neurological Disorders - Drug Targets 2018; 17 (7) . https://dx.doi.org/10.2174/1871527317666180706123229
DOI https://dx.doi.org/10.2174/1871527317666180706123229 |
Print ISSN 1871-5273 |
Publisher Name Bentham Science Publisher |
Online ISSN 1996-3181 |
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