Complex genotype-phenotype relationships in neurodevelopmental disorders

Area of Science:

• Genetics
• Neuroscience
• Developmental Biology

Background:

• Hundreds of high-confidence risk genes linked to neurodevelopmental disorders (NDDs) identified via sequencing.
• Significant clinical presentation heterogeneity observed in individuals with pathogenic variants in the same NDD gene.

Purpose of the Study:

• To propose that interacting factors modulate phenotypic outcomes of pathogenic variants in NDDs.
• To highlight the need for integrative approaches to resolve these modulating factors.

Main Methods:

• Integrative approaches combining population-scale genetics and functional genomics.
• Environmental monitoring and quantitative assessments of stochastic developmental variation.

Main Results:

• Heterogeneity in NDDs is attributed to variant-level features, genomic modifying variation, environmental exposures, and developmental noise.
• These factors interact to influence phenotypic outcomes.

Conclusions:

• Elucidating the etiology of NDDs requires understanding these complex interacting factors.
• Improved understanding is critical for advancing diagnostic and personalized therapeutic strategies for NDDs.