Right Anterior Theta Hypersynchrony as a Quantitative Measure Associated with Autistic Traits and K-Cl Cotransporter KCC2 Polymorphism

J Autism Dev Disord. 2022 Jan;52(1):61-72. doi: 10.1007/s10803-021-04924-x. Epub 2021 Feb 26.

Abstract

Our aim was to use theta coherence as a quantitative trait to investigate the relation of the polymorphisms in NKCC1 (rs3087889) and KCC2 (rs9074) channel protein genes to autistic traits (AQ) in neurotypicals. Coherence values for candidate connection regions were calculated from eyes-closed resting EEGs in two independent groups. Hypersynchrony within the right anterior region was related to AQ in both groups (p < 0.05), and variability in this hypersynchrony was related to the rs9074 polymorphism in the total group (p < 0.05). In conclusion, theta hypersynchrony within the right anterior region during eyes-closed rest can be considered a quantitative measure for autistic traits. Replicating our findings in two independent populations with different backgrounds strengthens the validity of the current study.

Keywords: Autistic traits; Coherence; Excitation/inhibition imbalance; KCC2; Quantitative traits; Theta oscillations.

MeSH terms

  • Autism Spectrum Disorder* / genetics
  • Autistic Disorder* / genetics
  • Electroencephalography
  • Humans
  • K Cl- Cotransporters
  • Solute Carrier Family 12, Member 2
  • Symporters* / genetics

Substances

  • SLC12A2 protein, human
  • SLC12A5 protein, human
  • Solute Carrier Family 12, Member 2
  • Symporters