Abstract: 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.

Abstract: The present invention aims to provide an assessment method of corpus uteri cancer susceptibility, in which a human chromosomal region consisting of a nucleotide sequence of approximately 100 bps that exhibits a DNA copy number polymorphism associated with corpus uteri cancer susceptibility is identified and assessment is made based on an increase or decrease in the DNA copy number polymorphism.

Abstract: 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.

Abstract: The present invention provides a method of detecting oral carcinoma cells with high accuracy, and a method of making possible early detection of oral carcinoma or discrimination between a precancerous lesion and an early cancer in diagnosis of oral carcinoma. The methods are achieved by screening cells for oral carcinoma or precancerous lesion by measuring a DNA copy number in whole chromosomes or a part thereof in a sample, wherein chromosomal regions for which said copy number is measured comprise at least one region selected from the group consisting of: a 22-23 region in the q arm of Chromosome 8, a 14-21 region in the p arm of Chromosome 3 and a 12-22 region in the p arm of Chromosome 5.

Abstract: A solid-state device for carrying out continuous detection or simultaneous detection of a subject for assay in plural cells, including a substrate and an array of spatially-separated plural sections formed on the substrate, each of the sections having an area enough to immobilize plural independent cells; a method for continuous detection or simultaneous detection of a subject for assay in plural cells using the device; and a cell assay system using the device.

Abstract: A reagent and method for detecting SNPs of DNA nucleotide sequences by using a single kind of beads of the same grain size are provided. Beads on which a probe is immobilized that hybridizes with a DNA nucleotide sequence having no SNP is mixed with beads on which another probe is immobilized that hybridizes with a DNA nucleotide sequence having SNP to make a reagent. The reagent is added to a sample solution containing a fluorescence-labeled DNA nucleotide sequence under investigation and hybridized. The beads after the reaction are flown in a flow cytometer to obtain a fluorescence intensity histogram pattern, based on which SNP of the DNA nucleotide sequence under investigation is determined.