What question did this study set out to answer?

To identify genetic mechanisms governing transcriptional regulation and complex physiological traits by mapping expression and splicing quantitative trait loci across diverse rat brain regions.

October 6, 2022Nucleic Acids ResearchOpen Access

The regulatory landscape of multiple brain regions in outbred heterogeneous stock rats

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Authors

DMDaniel MunroSeattle Children's Hospital TWTengfei WangBinzhou Medical University ACApurva S. ChitreUniversity of California, San Diego

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Implication

Transcriptomic analysis reveals extensive brain expression quantitative trait loci in outbred rats, highlighting shared regulatory mechanisms with human complex traits.

Key Points

To identify genetic mechanisms governing transcriptional regulation and complex physiological traits by mapping expression and splicing quantitative trait loci across diverse rat brain regions.
Generated matched genotype and transcriptome profiling data across five distinct brain regions from N=88 Heterogeneous Stock (HS) rats.
Identified cis-QTLs associated with gene expression and splicing variation, followed by validation using allele-specific expression assays.
Colocalized regulatory loci with GWAS signals for nine physiological traits and compared regulatory effects against human Genotype-Tissue Expression (GTEx) data.
Identified 21,392 cis-QTLs regulating gene expression and splicing across five brain regions, including 80 eQTLs that colocalized with GWAS loci from nine physiological traits.
Yielded twice as many significant eQTLs compared to a similarly sized human GTEx dataset, revealing a modest but highly significant correlation in regulatory variation between orthologous genes.
Demonstrated lower overall genetic regulatory variation in HS rats compared to humans while successfully identifying eQTLs for orthologs of human genes lacking known human eQTLs.

Cite This Study

Munro et al. (2022) studied this question.

synapsesocial.com/papers/6a1613827fedbd43eb9495c6 https://doi.org/10.1093/nar/gkac912

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Implication

Transcriptomic analysis reveals extensive brain expression quantitative trait loci in outbred rats, highlighting shared regulatory mechanisms with human complex traits.

The regulatory landscape of multiple brain regions in outbred heterogeneous stock rats

Discussion

Member takes

Implication

Key Points

Cite This Study

The regulatory landscape of multiple brain regions in outbred heterogeneous stock rats

Discussion

Member takes

Implication

Key Points

Cite This Study

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