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  • 1
    Keywords: CANCER ; MODEL ; RISK ; FAMILY ; SUSCEPTIBILITY ; breast cancer ; BREAST-CANCER ; BRCA1 ; WOMEN ; MUTATIONS ; MANAGEMENT ; VARIANT ; CHEK2 ; ALLELES ; ATM ; GENOME-WIDE ASSOCIATION ; BOADICEA MODEL ; PALB2
    Abstract: If breast cancers arise independently in each breast the odds ratio (OR) for bilateral breast cancer for carriers of CHEK2*11.00delC should be similar to 5.5, the square of the reported OR for a first primary (OR, 2.34). In the subset of bilateral cases with one or more affected relatives, the predicted carrier OR should be similar to 9. We have tested these predictions in a pooled set of 1,828 cases with 2 primaries and 7,030 controls from 8 studies. The second primary OR for CHEK2*1100delC carriers was 6.43 (95% confidence interval, 4.339.56; P 〈 0.0001), significantly greater than the published estimate for a first primary (P 〈 0.001) but consistent with its square. The predicted increase in carrier OR with increasing numbers of affected relatives was seen using bilateral cases from the UK (P-trend = 0.0003) and Finland (P-trend = 0.37), although not using those from the Netherlands and Russia (P = 0.001 for heterogeneity between countries). Based on a standard genetic model, we predict lifetime risks for CHEK2*1100delC carrier and noncarrier daughters of bilateral breast cancer cases of 37% and 18%, respectively. Our results imply that clinical management of the daughter of a woman with bilateral breast cancer should depend on her CHEK2*1100delC carrier status. This and other moderate penetrance breast cancer susceptibility alleles, together with family history data, will thus identify increasing numbers of women at potentially very high risk. Before such predictions are accepted by clinical geneticists, however, further population-based evidence is needed on the effect of CHEK2*1100delC and other moderate penetrance alleles in women with a family history of breast cancer. (Cancer Epidemiol Biomarkers Prev 2009;18(1):230-4)
    Type of Publication: Journal article published
    PubMed ID: 19124502
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  • 2
    Keywords: CANCER ; COMMON ; DISEASE ; RISK ; RISKS ; GENE ; GENES ; primary ; ASSOCIATION ; polymorphism ; POLYMORPHISMS ; single nucleotide polymorphism ; SUSCEPTIBILITY ; VARIANTS ; BREAST ; breast cancer ; BREAST-CANCER ; STAGE ; PATTERNS ; OVARIAN-CANCER ; SNP ; DATABASE ; Jun ; POPULATIONS ; familial risk ; BRCA2 MUTATIONS ; SUSCEPTIBILITY GENE ; SINGLE ; AGGREGATION ; VARIANT ; ALLELE ; SINGLE NUCLEOTIDE POLYMORPHISMS ; SNPs ; CANCER SUSCEPTIBILITY ; ALLELES ; LEVEL ; familial aggregation ; single-nucleotide ; UNIT ; ENGLAND ; LOCI ; CHEK2-ASTERISK-1100DELC ; breast cancer susceptibility ; GENOME-WIDE ASSOCIATION ; association study ; GENETIC-SUSCEPTIBILITY ; GROWTH-FACTOR RECEPTOR-2
    Abstract: Breast cancer exhibits familial aggregation, consistent with variation in genetic susceptibility to the disease. Known susceptibility genes account for less than 25% of the familial risk of breast cancer, and the residual genetic variance is likely to be due to variants conferring more moderate risks. To identify further susceptibility alleles, we conducted a two-stage genome-wide association study in 4,398 breast cancer cases and 4,316 controls, followed by a third stage in which 30 single nucleotide polymorphisms (SNPs) were tested for confirmation in 21,860 cases and 22,578 controls from 22 studies. We used 227,876 SNPs that were estimated to correlate with 77% of known common SNPs in Europeans at r(2) 〉 0.5. SNPs in five novel independent loci exhibited strong and consistent evidence of association with breast cancer (P 〈 10(-7)). Four of these contain plausible causative genes (FGFR2, TNRC9, MAP3K1 and LSP1). At the second stage, 1,792 SNPs were significant at the P 〈 0.05 level compared with an estimated 1,343 that would be expected by chance, indicating that many additional common susceptibility alleles may be identifiable by this approach
    Type of Publication: Journal article published
    PubMed ID: 17529967
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  • 3
    Keywords: CANCER ; EXPRESSION ; DISEASE ; RISK ; GENE ; GENES ; ASSOCIATION ; SUSCEPTIBILITY ; BREAST ; breast cancer ; BREAST-CANCER ; genetics ; familial risk ; USA ; LOCI ; GENOME-WIDE ASSOCIATION ; CONFER SUSCEPTIBILITY ; Genetic ; 33 ; COMMON VARIANTS ; Genome-wide association studies
    Abstract: Genome-wide association studies (GWAS) have identified seven breast cancer susceptibility loci, but these explain only a small fraction of the familial risk of the disease. Five of these loci were identified through a two-stage GWAS involving 390 familial cases and 364 controls in the first stage, and 3,990 cases and 3,916 controls in the second stage(1). To identify additional loci, we tested over 800 promising associations from this GWAS in a further two stages involving 37,012 cases and 40,069 controls from 33 studies in the CGEMS collaboration and Breast Cancer Association Consortium. We found strong evidence for additional susceptibility loci on 3p (rs4973768: per-allele OR 1.11, 95% CI = 1.08-1.13, P = 4.1 x 10(-23)) and 17q (rs6504950: per-allele OR 0.95, 95% CI = 0.92-0.97, P = 1.4 x 10(-8)). Potential causative genes include SLC4A7 and NEK10 on 3p and COX11 on 17q
    Type of Publication: Journal article published
    PubMed ID: 19330027
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  • 4
    Keywords: RECEPTOR ; APOPTOSIS ; CANCER ; HISTORY ; RISK ; SAMPLE ; TUMOR-NECROSIS-FACTOR ; FAMILY ; BIOMARKERS ; ASSOCIATION ; polymorphism ; POLYMORPHISMS ; single nucleotide polymorphism ; FREQUENCIES ; BREAST ; breast cancer ; BREAST-CANCER ; HEALTH ; AGE ; WOMEN ; SNP ; cancer risk ; GENOTYPES ; HETEROGENEITY ; FAMILIES ; VARIANT ; SINGLE NUCLEOTIDE POLYMORPHISMS ; ESTROGEN ; SINGLE-NUCLEOTIDE POLYMORPHISMS ; ALLELES ; biomarker ; GENOTYPE ; FAMILY-HISTORY ; USA ; CANCER-RISK ; Sample Size ; CONSORTIUM ; ERCC4 ; RECEPTOR STATUS ; PROGESTERONE-RECEPTOR GENE ; CASP8
    Abstract: Previous studies have suggested that minor alleles for ERCC4 rs744154, TNF rs361525, CASP10 rs13010627, PGR rs1042838, and BID rs8190315 may influence breast cancer risk, but the evidence is inconclusive due to their small sample size. These polymorphisms were genotyped in more than 30,000 breast cancer cases and 30,000 controls, primarily of European descent, from 30 studies in the Breast Cancer Association Consortium. We calculated odds ratios (OR) and 95% confidence intervals (95% CI) as a measure of association. We found that the minor alleles for these polymorphisms were not related to invasive breast cancer risk overall in women of European descent: ECCR4 per-allele OR (95% CI) = 0.99 (0.97-1.02), minor allele frequency = 27.5%; TNF 1.00 (0.95-1.06), 5.0%; CASP10 1.02 (0.98-1.07), 6.5%; PGR 1.02 (0.99-1.06), 15.3%; and BID 0.98 (0.86-1.12), 1.7%. However, we observed significant between-study heterogeneity for associations with risk for single-nucleotide polymorphisms (SNP) in CASP10, PGR, and BID. Estimates were imprecise for women of Asian and African descent due to small numbers and lower minor allele frequencies (with the exception of BID SNP). The ORs for each copy of the minor allele were not significantly different by estrogen or progesterone receptor status, nor were any significant interactions found between the polymorphisms and age or family history of breast cancer. In conclusion, our data provide persuasive evidence against an overall association between invasive breast cancer risk and ERCC4 rs744154, TNF rs361525, CASPIO rs13010627, PGR rs1042838, and BID rs8190315 genotypes among women of European descent. (Cancer Epidemiol Biomarkers Prev 2009;18(5):1610-6)
    Type of Publication: Journal article published
    PubMed ID: 19423537
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  • 5
    Keywords: CANCER ; EXPRESSION ; RISK ; GENE ; SUSCEPTIBILITY ; breast cancer ; PATTERNS ; risk factors ; ESTROGEN-RECEPTOR ; ALLELES ; GENOME-WIDE ASSOCIATION ; CONFER SUSCEPTIBILITY ; COMMON VARIANTS ; PROGESTERONE-RECEPTOR ; BRCA2 MUTATION CARRIERS ; Risk prediction
    Abstract: Breast cancers demonstrate substantial biological, clinical and etiological heterogeneity. We investigated breast cancer risk associations of eight susceptibility loci identified in GWAS and two putative susceptibility loci in candidate genes in relation to specific breast tumor subtypes. Subtypes were defined by five markers (ER, PR, HER2, CK5/6, EGFR) and other pathological and clinical features. Analyses included up to 30 040 invasive breast cancer cases and 53 692 controls from 31 studies within the Breast Cancer Association Consortium. We confirmed previous reports of stronger associations with ER+ than ER- tumors for six of the eight loci identified in GWAS: rs2981582 (10q26) (P-heterogeneity = 6.1 x 10(-18)), rs3803662 (16q12) (P = 3.7 x 10(-5)), rs13281615 (8q24) (P = 0.002), rs13387042 (2q35) (P = 0.006), rs4973768 (3p24) (P = 0.003) and rs6504950 (17q23) (P = 0.002). The two candidate loci, CASP8 (rs1045485, rs17468277) and TGFB1 (rs1982073), were most strongly related with the risk of PR negative tumors (P = 5.1 x 10(-6) and P = 4.1 x 10(-4), respectively), as previously suggested. Four of the eight loci identified in GWAS were associated with triple negative tumors (P 〈= 0.016): rs3803662 (16q12), rs889312 (5q11), rs3817198 (11p15) and rs13387042 (2q35); however, only two of them (16q12 and 2q35) were associated with tumors with the core basal phenotype (P 〈= 0.002). These analyses are consistent with different biological origins of breast cancers, and indicate that tumor stratification might help in the identification and characterization of novel risk factors for breast cancer subtypes. This may eventually result in further improvements in prevention, early detection and treatment
    Type of Publication: Journal article published
    PubMed ID: 21596841
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  • 6
    Keywords: CANCER ; RISK ; ASSOCIATION ; SUSCEPTIBILITY ; BREAST ; breast cancer ; BREAST-CANCER ; VARIANT ; SNPs
    Abstract: The Breast Cancer Association Consortium (BCAC) has been established to conduct combined case-control analyses with augmented statistical power to try to confirm putative genetic associations with breast cancer. We genotyped nine SNPs for which there was some prior evidence of an association with breast cancer: CASP8 D302H (rs1045485), IGFBP3 -202 C --〉 A (rs2854744), SOD2 V16A (rs1799725), TGFB1 L10P (rs1982073), ATM S49C (rs1800054), ADH1B 3' UTR A --〉 G (rs1042026), CDKN1A S31R (rs1801270), ICAM5 V301I (rs1056538) and NUMA1 A794G (rs3750913). We included data from 9-15 studies, comprising 11,391-18,290 cases and 14,753-22,670 controls. We found evidence of an association with breast cancer for CASP8 D302H (with odds ratios (OR) of 0.89 (95% confidence interval (c.i.): 0.85-0.94) and 0.74 (95% c.i.: 0.62-0.87) for heterozygotes and rare homozygotes, respectively, compared with common homozygotes; P(trend) = 1.1 x 10(-7)) and weaker evidence for TGFB1 L10P (OR = 1.07 (95% c.i.: 1.02-1.13) and 1.16 (95% c.i.: 1.08-1.25), respectively; P(trend) = 2.8 x 10(-5)). These results demonstrate that common breast cancer susceptibility alleles with small effects on risk can be identified, given sufficiently powerful studies
    Type of Publication: Journal article published
    PubMed ID: 17293864
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  • 7
    Keywords: RECEPTOR ; CANCER ; EXPRESSION ; GROWTH ; SURVIVAL ; tumor ; KINASE ; DIAGNOSIS ; SUPPORT ; DISEASE ; RISK ; DISTINCT ; PROTEIN ; TUMORS ; PROTEIN-KINASE ; ASSOCIATION ; polymorphism ; POLYMORPHISMS ; SUSCEPTIBILITY ; BREAST ; breast cancer ; BREAST-CANCER ; prevention ; DIFFERENCE ; genetics ; COLORECTAL-CANCER ; PROSTATE-CANCER ; cancer risk ; PROGNOSTIC-FACTORS ; PROGNOSTIC FACTORS ; PROGNOSTIC FACTOR ; heredity ; KERATINOCYTE GROWTH-FACTOR ; HETEROGENEITY ; fibroblast ; SNPs ; overall survival ; GRADE ; PROGNOSTIC-FACTOR ; METAANALYSIS ; ESTROGEN ; USA ; CANCER-RISK ; comparison ; GENOME-WIDE ASSOCIATION ; LOW-GRADE ; FGFR2 ; NUCLEOTIDE ; genetic variants
    Abstract: A three-stage genome-wide association study recently identified single nucleotide polymorphisms ( SNPs) in five loci ( fibroblast growth receptor 2 ( FGFR2), trinucleotide repeat containing 9 ( TNRC9), mitogen-activated protein kinase 3 K1 (MAP3K1), 8q24, and lymphocyte- specific protein 1 ( LSP1)) associated with breast cancer risk. We investigated whether the associations between these SNPs and breast cancer risk varied by clinically important tumor characteristics in up to 23,039 invasive breast cancer cases and 26,273 controls from 20 studies. We also evaluated their influence on overall survival in 13,527 cases from 13 studies. All participants were of European or Asian origin. rs2981582 in FGFR2 was more strongly related to ER- positive ( per- allele OR ( 95%CI) = 1.31 (1.27-1.36)) than ER- negative (1.08 (1.03- 1.14)) disease ( P for heterogeneity = 10-(13)). This SNP was also more strongly related to PR-positive, low grade and node positive tumors (P = 10(-5), 10(-8), 0.013, respectively). The association for rs13281615 in 8q24 was stronger for ER- positive, PR-positive, and low grade tumors (P = 0.001, 0.011 and 10(-4), respectively). The differences in the associations between SNPs in FGFR2 and 8q24 and risk by ER and grade remained significant after permutation adjustment for multiple comparisons and after adjustment for other tumor characteristics. Three SNPs ( rs2981582, rs3803662, and rs889312) showed weak but significant associations with ER- negative disease, the strongest association being for rs3803662 in TNRC9 ( 1.14 ( 1.09-1.21)). rs13281615 in 8q24 was associated with an improvement in survival after diagnosis ( per- allele HR = 0.90 (0.83-0.97). The association was attenuated and non-significant after adjusting for known prognostic factors. Our findings show that common genetic variants influence the pathological subtype of breast cancer and provide further support for the hypothesis that ER- positive and ER- negative disease are biologically distinct. Understanding the etiologic heterogeneity of breast cancer may ultimately result in improvements in prevention, early detection, and treatment
    Type of Publication: Journal article published
    PubMed ID: 18437204
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