Discovering Genes for Mouse Brain Weight
Author Information
Author(s): Lu Lu, Wei Lai, Peirce Jeremy L, Wang Xusheng, Zhou Jianhua, Homayouni Ramin, Williams Robert W, Airey David C
Primary Institution: University of Tennessee Health Sciences Center
Hypothesis
Can gene expression data help identify candidate genes for quantitative trait loci (QTL) affecting mouse forebrain weight?
Conclusion
The study successfully identified two candidate genes, Tnni1 and Asb3, that are associated with increased mouse forebrain weight using a five-filter protocol combining gene expression data and QTL mapping.
Supporting Evidence
- The study identified significant QTLs on chromosomes 1 and 11 associated with forebrain weight.
- Tnni1 and Asb3 were confirmed to have increased expression in the C57BL/6J genotype compared to DBA/2J.
- A 273 bp indel polymorphism was discovered upstream of the Tnni1 transcription start site.
Takeaway
Scientists used a special method to find genes that might make mouse brains bigger. They found two important genes that help with this.
Methodology
The study used a five-filter protocol to identify candidate genes based on their proximity to QTLs, correlation with forebrain weight, and differences in expression between parental strains.
Limitations
The study is limited to two inbred strains and may miss gene variants that do not affect expression levels.
Participant Demographics
BXD recombinant inbred lines derived from C57BL/6J and DBA/2J strains.
Statistical Information
P-Value
p = 0.004 for Tnni1, p = 0.007 for Asb3
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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