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Review
.2024 Apr 3;14(4):437.
doi: 10.3390/biom14040437.

Roles of Epigenetics and Glial Cells in Drug-Induced Autism Spectrum Disorder

Affiliations
Review

Roles of Epigenetics and Glial Cells in Drug-Induced Autism Spectrum Disorder

Antonei B Csoka et al. Biomolecules..

Abstract

Autism spectrum disorder (ASD) is a neurodevelopmental disorder characterized by severe deficits in social communication and interaction, repetitive movements, abnormal focusing on objects, or activity that can significantly affect the quality of life of the afflicted. Neuronal and glial cells have been implicated. It has a genetic component but can also be triggered by environmental factors or drugs. For example, prenatal exposure to valproic acid or acetaminophen, or ingestion of propionic acid, can increase the risk of ASD. Recently, epigenetic influences on ASD have come to the forefront of investigations on the etiology, prevention, and treatment of this disorder. Epigenetics refers to DNA modifications that alter gene expression without making any changes to the DNA sequence. Although an increasing number of pharmaceuticals and environmental chemicals are being implicated in the etiology of ASD, here, we specifically focus on the molecular influences of the abovementioned chemicals on epigenetic alterations in neuronal and glial cells and their potential connection to ASD. We conclude that a better understanding of these phenomena can lead to more effective interventions in ASD.

Keywords: acetaminophen; autism spectrum disorder; epigenetics; gliosis; neuroinflammation; propionic acid; teratogen; valproic acid.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Schematic diagram depicting the direct influence of the drugs on epigenetics, leading to ASD. The two prominent epigenetic mechanisms, which affect gene expression without changing the genetic sequence, involve histone deacetylation, which results in chromatin remodeling, or DNA methylation. Interestingly, VPA may exert its epigenetic effects via histone deacetylation, whereas acetaminophen and propionic acid affect DNA methylation. Regardless of the epigenetic mechanism, however, the drug may increase the chance of ASD development [160].
Figure 2
Figure 2
Schematic diagram depicting how environmental triggers, such as drugs, heavy metals, or dysbiosis in the gut microbiota, may result in autism spectrum disorder (ASD). This can be due to the individual’s genetic predisposition or may be brought about indirectly via epigenetic effects. The outcome is a disturbance in the homeostasis, which can also involve glial dysregulation.
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