Neuregulin 2 Is a Candidate Gene for Autism Spectrum Disorder.

Area of Science:

• Neuroscience
• Genetics
• Developmental Biology

Background:

• Autism spectrum disorder (ASD) is a complex neurodevelopmental disorder with intricate genetic factors.
• Previous studies indicated altered neuregulin-2 gene (NRG2) expression in ASD patients.

Purpose of the Study:

• To investigate the association between the NRG2 gene and ASD.
• To confirm differential NRG2 expression and identify potential causative variants in ASD.

Main Methods:

• Real-time quantitative PCR was used to validate NRG2 gene expression differences between 20 ASD patients and 20 controls.
• Exome resequencing of NRG2 was performed on 349 individuals with ASD to identify genetic variants.
• Allele and genotype frequencies of identified variants were compared between ASD cases and controls from the Taiwan Biobank.

Main Results:

• NRG2 expression was significantly lower in ASD patients compared to controls (p < 0.001).
• Two single nucleotide variants (rs889022, rs182642591) showed no significant frequency differences between groups.
• A small deletion in exon 11 (rs933769137) exhibited a significant difference in genotype and allele frequencies between ASD cases and controls (p < 0.0001).

Conclusions:

• The NRG2 gene, particularly the identified deletion variant, may play a role in ASD susceptibility.
• NRG2 warrants further investigation as a potential genetic factor contributing to autism spectrum disorder.