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Screening for Functional Non-coding Genetic Variants Using Electrophoretic Mobility Shift Assay EMSA and DNA-affinity Precipitation Assay DAPA
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Decoding the non-coding genome: elucidating genetic risk outside the coding genome.

C L Barr1,2, V L Misener1

  • 1Toronto Western Research Institute, University Health Network.

Genes, Brain, and Behavior
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PubMed
Summary
This summary is machine-generated.

Genetic variation impacting gene expression, not just protein sequences, is key for complex traits and psychiatric disorders. Research faces challenges in studying brain gene regulation and its role in psychiatric risk.

Keywords:
5-Hydroxymethylationadolescent brainenhancersepigeneticsgene expressiongene regulationmethylationnon-CG methylationnon-coding RNApsychiatric disorderstranscriptome

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Area of Science:

  • Neurogenetics
  • Molecular Psychiatry
  • Epigenetics

Background:

  • Genome-wide association studies (GWAS) suggest genetic variation influencing gene expression is crucial for complex traits, including psychiatric disorders.
  • Genetic changes in regulatory regions may alter responses to developmental and environmental factors, impacting psychiatric risk.
  • The connection between transcriptional regulation and psychiatric genetic risk is understudied due to research obstacles.

Purpose of the Study:

  • To review knowledge gaps and obstacles in understanding the role of gene-regulatory variants in psychiatric disorders.
  • To highlight challenges in identifying regulatory elements and their target genes.
  • To address limitations in brain tissue availability for epigenetic and transcriptome profiling.

Main Methods:

  • Review of current evidence on genetic variation, gene expression, and psychiatric disorders.
  • Discussion of challenges in studying distal regulatory elements (enhancers) and their target genes.
  • Examination of difficulties in predicting the functional impact of DNA variation on transcriptional control.

Main Results:

  • Obstacles include identifying remote regulatory elements, underrepresentation of neural tissues in epigenome projects, and limited brain tissue availability.
  • Predicting functional impacts of DNA variation on enhancer-promoter interactions, transcription factor binding, and DNA methylation presents further challenges.
  • The brain exhibits unique DNA methylation patterns, including non-CG methylation and 5-hydroxymethylation, with roles in neurodevelopment that require further investigation.

Conclusions:

  • Overcoming technological and resource limitations is essential to understand how brain-specific gene-regulatory variants contribute to psychiatric disorder risk.
  • Further research is needed to elucidate the complex interplay between epigenetics, gene regulation, and neurodevelopment in psychiatric conditions.
  • Integrating epigenomic and transcriptomic data from diverse neural cell types and developmental stages is critical for advancing the field.