Abstract
Autism is a neurodevelopmental disorder manifested by impaired social interaction, deficits in communication skills, restricted interests, and repetitive behaviors. In neurodevelopmental, neurodegenerative, and psychiatric disorders, glial cells undergo morphological, biochemical, and functional rearrangements, which are critical for neuronal development, neurotransmission, and synaptic connectivity. Cerebellar function is not limited to motor coordination but also contributes to cognition and may be affected in autism. Oligodendrocytes and specifically oligodendroglial precursors are highly susceptible to oxidative stress and excitotoxic insult. In the present study, we searched for evidence for developmental oligodendropathy in the context of autism by performing a network analysis of gene expression of cerebellar tissue. We created an in silico network model (OLIGO) showing the landscape of interactions between oligodendrocyte markers and demonstrated that more than 50 % (16 out of 30) of the genes within this model displayed significant changes of expression (corrected p value <0.05) in the cerebellum of autistic patients. In particular, we found up-regulation of OLIG2-, MBP-, OLIG1-, and MAG-specific oligodendrocyte markers. We postulate that aberrant expression of oligodendrocyte-specific genes, potentially related to changes in oligodendrogenesis, may contribute to abnormal cerebellar development, impaired myelination, and anomalous synaptic connectivity in autism spectrum disorders (ASD).
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Abbreviations
- APP:
-
amyloid protein precursor
- ASD:
-
autism spectrum disorders
- CNS:
-
central nervous system
- FDR:
-
false discovery rate
- OL:
-
oligodendrocyte
- OPCs:
-
oligodendroglial precursors.
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Acknowledgements
FZC holds a PNPD postdoctoral position (Programa de Pós Graduação em Ciências Biológicas: Bioquímica, Universidade Federal do Rio Grande do Sul) funded by CAPES. AV was supported in part by the grant (agreement from 27 August 2013 No. 02.B.49.21.0003) between The Ministry of Education and Science of the Russian Federation and Lobachevsky State University of Nizhny Novgorod and by the grant of the Russian Scientific Foundation No.14-15-00633.
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Zeidán-Chuliá, F., de Oliveira, BH.N., Casanova, M.F. et al. Up-Regulation of Oligodendrocyte Lineage Markers in the Cerebellum of Autistic Patients: Evidence from Network Analysis of Gene Expression. Mol Neurobiol 53, 4019–4025 (2016). https://doi.org/10.1007/s12035-015-9351-7
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DOI: https://doi.org/10.1007/s12035-015-9351-7