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A Phenotyping Regimen for Genetically Modified Mice Used to Study Genes Implicated in Human Diseases of Aging
Published on: July 14, 2016
Marker loci associated with life span in genetically heterogeneous mice
R A Miller1, C Chrisp, A U Jackson
1Department of Pathology, University of Michigan, 48109-0940, USA. miller@umich.edu
Summary
Genetic markers linked to longevity were identified in mice, with effects varying by sex. This study provides a foundation for understanding the genetic basis of a long life span in humans.
Area of Science:
- Genetics
- Longevity Research
- Animal Models
Background:
- The genetic underpinnings of exceptional longevity remain largely unknown.
- Investigating gene/life span associations in mice can inform human longevity studies.
Purpose of the Study:
- To identify genetic loci associated with differential longevity in mice.
- To explore sex-specific genetic influences on life span.
Main Methods:
- Genotyping of 144 genetically heterogeneous mice at 82 loci.
- Monitoring mice until natural death or severe illness, followed by necropsy.
- Statistical analysis (ANOVA) to correlate life span with sex and marker alleles.
Main Results:
- Seven genetic markers showed associations with longevity, with five in males and two in females.
- Longevity associations were predominantly sex-specific, affecting either males or females.
- The strongest associations indicated approximately a 20% difference in mean survival within the affected sex.
Conclusions:
- Genetic markers demonstrate significant associations with life span in this mouse model.
- These associations appear to be sex-specific, warranting further investigation.
- The findings support further analysis into the genetic basis of longevity.
