Species-conserved SYNGAP1 phenotypes associated with neurodevelopmental disorders.

Area of Science:

• Neurobiology
• Genetics
• Developmental Biology

Background:

• Loss-of-function variants in the SYNGAP1 gene are causally associated with neurodevelopmental disorders (NDDs) such as intellectual disability, epilepsy, autism spectrum disorder, and schizophrenia.
• SYNGAP1 is unique due to the frequency and penetrance of its loss-of-function variants and the range of brain disorders linked to its pathogenicity.
• These findings suggest SYNGAP1 regulates fundamental neurodevelopmental processes essential for brain development.

Purpose of the Study:

• To describe four phenotypic domains controlled by Syngap1 expression across vertebrate species.
• To integrate current literature with new data to define these domains.
• To explore how understanding Syngap1 functions can generalize to other NDDs.

Main Methods:

• Literature review to define cognitive function maturation and excitatory-inhibitory balance domains.
• Integration of literature with new data to define innate survival behaviors and brain structure domains.
• Analysis of molecular and cellular functions of Syngap1 in relation to disease phenotypes.

Main Results:

• Four phenotypic domains regulated by Syngap1 have been identified: cognitive function maturation, excitatory-inhibitory balance, innate survival behaviors, and brain structure.
• These domains are commonly disrupted in neurodevelopmental disorders.
• Syngap1's molecular and cellular functions are discussed in the context of disease-relevant phenotypes.

Conclusions:

• A deeper understanding of Syngap1's developmental functions can provide insights generalizable to various NDDs, regardless of their specific etiology.
• Exploring Syngap1 neurobiology may uncover fundamental principles of NDD pathobiology.
• Further research into unexplored areas of Syngap1 neurobiology is warranted.