Patent attributes
The present invention aims to provide a method for determining breast cancer susceptibility, in which a DNA copy number polymorphism associated with breast cancer susceptibility is identified and determination is made based on an increase or decrease in the DNA copy number polymorphism. The present invention attempts to achieve this by performing microarray assay using the peripheral blood of sporadic breast cancer patients, identifying a DNA copy number polymorphism associated with breast cancer susceptibility in a chromosomal region, detecting the number of copies of the above DNA copy number polymorphism by quantitative PCR, and then determining breast cancer susceptibility based on an increase or decrease in the DNA copy number polymorphism. Furthermore, the precision of the determination of breast cancer susceptibility can be improved by detecting a DNA copy number polymorphism by the aforementioned quantitative PCR by selecting two or more chromosomal regions and then performing a discriminant analysis based on the results thus obtained.
