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Molecular Autism
Published in: Molecular Autism 1/2017

Open Access 01-12-2017 | Research

Serum and cerebrospinal fluid immune mediators in children with autistic disorder: a longitudinal study

Authors: Carlos A. Pardo, Cristan A. Farmer, Audrey Thurm, Fatma M. Shebl, Jorjetta Ilieva, Simran Kalra, Susan Swedo

Published in: Molecular Autism | Issue 1/2017

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Abstract

Background

The causes of autism likely involve genetic and environmental factors that influence neurobiological changes and the neurological and behavioral features of the disorder. Immune factors and inflammation are hypothesized pathogenic influences, but have not been examined longitudinally.

Methods

In a cohort of 104 participants with autism, we performed an assessment of immune mediators such as cytokines, chemokines, or growth factors in serum and cerebrospinal fluid (n = 67) to determine potential influences of such mediators in autism.

Results

As compared with 54 typically developing controls, we found no evidence of differences in the blood profile of immune mediators supportive of active systemic inflammation mechanisms in participants with autism. Some modulators of immune function (e.g., EGF and soluble CD40 ligand) were increased in the autism group; however, no evidence of group differences in traditional markers of active inflammation (e.g., IL-6, TNFα, IL-1β) were observed in the serum. Further, within-subject stability (measured by estimated intraclass correlations) of most analytes was low, indicating that a single measurement is not a reliable prospective indicator of concentration for most analytes. Additionally, in participants with autism, there was little correspondence between the blood and CSF profiles of cytokines, chemokines, and growth factors, suggesting that peripheral markers may not optimally reflect the immune status of the central nervous system. Although the relatively high fraction of intrathecal production of selected chemokines involved in monocyte/microglia function may suggest a possible relationship with the homeostatic role of microglia, control data are needed for further interpretation of its relevance in autism.

Conclusions

These longitudinal observations fail to provide support for the hypothesized role of disturbances in the expression of circulating cytokines and chemokines as an indicator of systemic inflammation in autism. ClinicalTrials.gov, NCT00298246.
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Metadata
Title
Serum and cerebrospinal fluid immune mediators in children with autistic disorder: a longitudinal study
Authors
Carlos A. Pardo
Cristan A. Farmer
Audrey Thurm
Fatma M. Shebl
Jorjetta Ilieva
Simran Kalra
Susan Swedo
Publication date
01-12-2017
Publisher
BioMed Central
Published in
Molecular Autism / Issue 1/2017
Electronic ISSN: 2040-2392
DOI
https://doi.org/10.1186/s13229-016-0115-7

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