Tandem repeats in human brain evolution and disease susceptibility

Area of Science:

• Genomics
• Neuroscience
• Molecular Biology

Background:

• Tandem repeats (TRs) are highly mutable genomic elements impacting gene regulation across multiple levels.
• TR expansions in humans are linked to brain evolution, with specific repeats near neurodevelopmental genes.
• TR plasticity, while driving innovation, also causes genomic instability, making the nervous system vulnerable.

Purpose of the Study:

• To explore the multifaceted roles of TRs in neural function and dysfunction.
• To understand TRs as key components of neural regulatory architecture.
• To provide a framework for interpreting the genetic basis of neurological and psychiatric disorders.

Main Methods:

• Review of recent studies on TRs in neurobiology.
• Analysis of TRs' impact on gene regulation (transcription, chromatin, splicing, protein function).
• Investigation of pathogenic mechanisms of TR instability in the nervous system.

Main Results:

• TRs significantly modulate gene regulation, affecting transcription, chromatin, splicing, and protein function.
• Human-specific TRs are enriched near neurodevelopmental genes and neural regulatory elements.
• TR instability contributes to neurological dysfunction through diverse pathogenic mechanisms.

Conclusions:

• TRs are integral to neural regulatory architecture and play a dual role in brain evolution and disease.
• Understanding TRs is crucial for deciphering the genetic underpinnings of neurological and psychiatric disorders.
• TRs represent a significant area for future research in neuroscience and genetics.