Mapping Complex Traits in a Diversity Outbred F1 Mouse Population Identifies Germline Modifiers of Metastasis in...

Area of Science:

• Genetics
• Oncology
• Systems Biology

Background:

• The impact of standing genetic variation on prostate cancer prognosis remains largely unknown.
• Understanding these genetic factors is crucial for improving patient outcomes.

Purpose of the Study:

• To investigate how genetic variation affects prostate cancer progression and patient prognosis.
• To identify specific genes and genetic loci that modify prostate cancer metastasis.

Main Methods:

• Crossed a prostate cancer mouse model with Diversity Outbred mice carrying millions of single nucleotide polymorphisms (SNPs).
• Integrated phenotype and SNP data from 493 F1 male mice to identify modifier loci.
• Analyzed over 5,300 human prostate cancer patient samples for genetic variant correlations.

Main Results:

• Identified a metastasis modifier locus on Chromosome 8 in mice, implicating RWDD4, CENPU, and CASP3 genes.
• Found correlations between genetic variants in these loci, gene expression, cancer aggressiveness, and survival in human prostate cancer patients.
• Demonstrated that RWDD4 and CENPU overexpression enhances the aggressiveness of human prostate cancer cell lines.

Conclusions:

• Systems genetics in mice can identify germline modifiers of human diseases.
• Genetic variants at RWDD4, CENPU, and CASP3 loci are associated with prostate cancer aggressiveness and patient survival.
• This study provides a framework for using mouse genetic variation to understand human disease mechanisms.