Comprehensive Genetic Study of a Monozygotic Triplet Discordant for Autism Spectrum Disorder

Area of Science:

• Genetics
• Neuroscience
• Developmental Biology

Background:

• Comprehensive genetic studies on autism spectrum disorders (ASD) in India are limited.
• Multiple birth children offer unique opportunities for genomic research in complex conditions like ASD.
• Investigating familial genetic factors is crucial for understanding ASD etiology.

Observation:

• Whole-exome sequencing (WES) was performed on a triplet family where only one individual was diagnosed with ASD.
• The study focused on identifying candidate genes associated with ASD in this unique case.
• Analysis revealed proband-specific de novo variants, including single nucleotide polymorphisms (SNPs) and indels.

Findings:

• Seven missense variations were identified within exonic regions.
• Seventeen identified variants have been previously associated with ASD in other studies.
• Genes with identified variants are implicated in central nervous system development and maintenance, particularly in cell adhesion processes.

Implications:

• This research provides novel insights into the genetic underpinnings of ASD in a familial context.
• The findings contribute to the limited genetic data on ASD within the Indian population.
• This study highlights the potential of studying monozygotic triplets for understanding complex genetic disorders like ASD.