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Genetic characterization of the Dyscalc locus
Veronica V Colinayo1, Jian-Hua Qiao, Peter Demant
1Department of Microbiology, Immunology and Molecular Genetics, University of California Los Angeles, 90095, USA.
Summary
Genetic factors influence aortic calcification. The Dyscalc locus on mouse Chromosome 7 is a key contributor to vascular calcification, enabling finer genetic mapping and characterization.
Area of Science:
- Genetics
- Cardiovascular Biology
- Atherosclerosis Research
Background:
- Calcification is common in atherosclerosis.
- Genetic factors contribute to calcification in mouse models.
- The Dyscalc locus is implicated in myocardial calcification.
Purpose of the Study:
- To identify genetic factors contributing to aortic calcification.
- To further characterize the Dyscalc locus.
- To enable detailed genetic and biochemical analysis of Dyscalc.
Main Methods:
- Crossbreeding susceptible (DBA/2J) and resistant (C57BL/6J) mouse strains.
- Analyzing recombinant inbred strains.
- Developing congenic strains (C57BL/10 on C3H/DiSnA background) to isolate the Dyscalc locus.
Main Results:
- The Dyscalc locus on mouse Chromosome 7 segregated with vascular calcification.
- Congenic strains showed significantly reduced myocardial and vascular calcification compared to the background strain.
- Calcification in congenic strains segregated as a Mendelian factor.
Conclusions:
- The Dyscalc locus is a significant genetic factor influencing aortic calcification.
- The development of congenic strains facilitates the fine mapping of Dyscalc.
- Dyscalc plays a role in both myocardial and vascular calcification.