**Abbreviations**

ASD, autism spectrum disorders; FXS, Fragile X syndrome, GABA, gamma-aminobutyric acid; GSH, gamma-glutamylcysteinylglycine; IL-6, interleukin 6; NAC, N-Acetyl-L-Cysteine; PST, phenol sulfotransferase; ROS, reactive oxygen species; SOD, superoxide dismutases; VLCFA, very long chain fatty acids

### **Acknowledgements**

We thank for the grants from the Academy of Finland, the Arvo and Lea Ylppö Foundation, and the Finnish Brain Research Foundation.
