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Transcriptome-wide association studies: recent advances in methods, applications and available databases.

Jialin Mai1,2,3, Mingming Lu1,2,3, Qianwen Gao1,2,3

  • 1National Genomics Data Center, Beijing Institute of Genomics, Chinese Academy of Sciences and China National Center for Bioinformation, Beijing, 100101, China.

Communications Biology
|September 1, 2023
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Summary
This summary is machine-generated.

Transcriptome-wide association studies (TWAS) help identify genes linked to traits by analyzing gene expression. This review covers TWAS methods, applications, and resources for understanding gene-trait links.

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Area of Science:

  • Genetics
  • Bioinformatics
  • Systems Biology

Background:

  • Genome-wide association studies (GWAS) identify genetic variants associated with heritable traits.
  • Pinpointing the specific genes influenced by these GWAS variants remains a significant challenge.

Purpose of the Study:

  • To provide a comprehensive review of Transcriptome-wide association studies (TWAS).
  • To summarize TWAS methodology, diverse applications, and available resources.
  • To highlight TWAS's role in linking genetic variants to functional genes and biological mechanisms.

Main Methods:

  • TWAS integrates genetic association data with gene expression data (eQTLs).
  • It models regulatory relationships between genetic variants and gene transcription levels.
  • Statistical methods are employed to detect significant gene-trait associations.

Main Results:

  • TWAS effectively identifies functional genes regulated by trait-associated variants.
  • It offers insights into the molecular mechanisms underlying diseases and other phenotypes.
  • Numerous advancements have been made in TWAS methodologies and applications.

Conclusions:

  • TWAS is a powerful approach for bridging the gap between genetic associations and biological function.
  • It enhances our understanding of the genetic architecture of complex traits.
  • This review serves as a valuable resource for researchers utilizing or exploring TWAS.