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Kim S.-Y.,Cancer Genomics Branch | Yoo J.-Y.,Cancer Genomics Branch | Shin A.,Molecular Epidemiology Branch | Kim Y.,Cancer Early Detection Branch | And 3 more authors.
Asian Pacific Journal of Cancer Prevention | Year: 2012

Introduction: Breast cancer is the second leading cancer in Korean women. To assess potential genetic associations between the prostate stem cell antigen (PSCA) gene in the chromosome 8q24 locus and breast cancer risk in Korean women, 13 SNPs were selected and associations with breast cancer risk were analyzed with reference to hormone receptor (HR) and menopausal status. Methods:We analyzed DNA extracted from buffy coat from 456 patients and 461 control samples, using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) based upon region-specific PCR followed by allele-specific single base primer extension reactions. Risks associated with PSCA genotypes and haplotypes were estimated with chi-square test (χ2 -test), and polytomous logistic regression models using odds ratios (OR) and 95% confidence intervals (CIs), by HR and menopausal status. Results: In case-control analysis, odds ratios (OR) of rs2294009, rs2294008, rs2978981, rs2920298, rs2976395, and rs2976396 were statistically significant only among women with estrogen receptor (ER) negative cancers, and those of rs2294008, rs2978981, rs2294010, rs2920298, rs2976394, rs10216533, and rs2976396 were statistically significant only in pre-menopausal women, and not in postmenopausal women. Risk with the TTGGCAA haplotype was significantly elevated in ER (-) status (OR= 1.48, 95% CI= 1.03~2.12, p<0.05). Especially risk of allele T of rs2294008 is significantly low in pre-menopausal breast cancer patients and AA genotype of rs2976395 in ER (-) status represents the increase of OR value. Conclusion: This report indicated for the first time that associations exist between PSCA SNPs and breast cancer susceptibility in Korean women, particularly those who are pre-menopausal with an estrogen receptor negative tumor status. Source

Oh D.K.,Cancer Early Detection Branch | Shim J.I.,Cancer Early Detection Branch | Han M.,Cancer Early Detection Branch | Kim Y.,Cancer Early Detection Branch | And 4 more authors.
Journal of Breast Cancer | Year: 2010

Purpose: The Korean National Cancer Screening Program began in 1999. To provide essential evidence related to breast cancer screening in Korean women, we analyzed data from the KNCSP in 2008. Methods: Using data obtained from the National Cancer Screening Information System, breast cancer screening participation rates were calculated. Recall rates were estimated with 95% confidence intervals (CI). Results: The target population of breast cancer screening in 2008 included 3,706,062 women, 1,294,060 of whom utilized mammography as a screening tool (participation rate, 34.9%). Compared to the participation rate of women covered by the National Health Insurance Program (37.3%), women covered by the Medical Aid Program was lower (21.3%). The overall recall rate of breast cancer screening was 6.4% (95% CI, 6.39-6.47). Conclusion: According to our study, efforts to facilitate the participation and to reduce disparities in breast cancer screening among Korean women are needed. These results will provide essential data for evidence-based strategies in breast cancer control in Korea. Source

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