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Sökning: WFRF:(Barrdahl Myrto) > (2015)

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  • Barrdahl, Myrto, et al. (författare)
  • Association of breast cancer risk loci with breast cancer survival
  • 2015
  • Ingår i: International Journal of Cancer. - Wiley-Blackwell. - 0020-7136 .- 1097-0215. ; 137:12, s. 2837-2845
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>The survival of breast cancer patients is largely influenced by tumor characteristics, such as TNM stage, tumor grade and hormone receptor status. However, there is growing evidence that inherited genetic variation might affect the disease prognosis and response to treatment. Several lines of evidence suggest that alleles influencing breast cancer risk might also be associated with breast cancer survival. We examined the associations between 35 breast cancer susceptibility loci and the disease over-all survival (OS) in 10,255 breast cancer patients from the National Cancer Institute Breast and Prostate Cancer Cohort Consortium (BPC3) of which 1,379 died, including 754 of breast cancer. We also conducted a meta-analysis of almost 35,000 patients and 5,000 deaths, combining results from BPC3 and the Breast Cancer Association Consortium (BCAC) and performed <em>in silico</em> analyses of SNPs with significant associations. In BPC3, the C allele of <em>LSP1</em>-rs3817198 was significantly associated with improved OS (HR<sub>per-allele</sub>=0.70; 95% CI: 0.58-0.85; <em>p</em><sub>trend</sub>=2.84 x 10<sup>-4</sup>; HR<sub>heterozygotes</sub>=0.71; 95% CI: 0.55-0.92; HR<sub>homozygotes</sub>=0.48; 95% CI: 0.31-0.76; <em>p</em><sub>2DF</sub>=1.45 x 10<sup>-3</sup>). <em>In silico</em>, the C allele of <em>LSP1</em>-rs3817198 was predicted to increase expression of the tumor suppressor cyclin-dependent kinase inhibitor 1C (<em>CDKN1C</em>). In the meta-analysis, <em>TNRC9</em>-rs3803662 was significantly associated with increased death hazard (HR<sub>META</sub> =1.09; 95% CI: 1.04-1.15; <em>p</em><sub>trend</sub>=6.6 x 10<sup>-4</sup>; HR<sub>heterozygotes</sub>=0.96 95% CI: 0.90-1.03; HR<sub>homozygotes</sub>=1.21; 95% CI: 1.09-1.35; <em>p</em><sub>2DF</sub>=1.25 x 10<sup>-4</sup>). In conclusion, we show that there is little overlap between the breast cancer risk single nucleotide polymorphisms (SNPs) identified so far and the SNPs associated with breast cancer prognosis, with the possible exceptions of <em>LSP1</em>-rs3817198 and <em>TNRC9</em>-rs3803662.</p><p>What's new? Genetic factors are known to influence the risk of breast cancer, but inherited genetic variation may also affect disease prognosis and response to treatment. In this study, the we investigated whether single nucleotide polymorphisms (SNPs) that are known to be associated with breast cancer risk might also influence the survival of breast-cancer patients. While two of the investigated SNPs may influence survival, there was otherwise no indication that SNP alleles related to breast cancer risk also play a role in the survival of breast cancer patients.</p>
  • Campa, Daniele, et al. (författare)
  • Genetic risk variants associated with in situ breast cancer
  • 2015
  • Ingår i: Breast Cancer Research. - 1465-5411 .- 1465-542X. ; 17
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>Introduction: Breast cancer in situ (BCIS) diagnoses, a precursor lesion for invasive breast cancer, comprise about 20 % of all breast cancers (BC) in countries with screening programs. Family history of BC is considered one of the strongest risk factors for BCIS.</p><p>Methods: To evaluate the association of BC susceptibility loci with BCIS risk, we genotyped 39 single nucleotide polymorphisms (SNPs), associated with risk of invasive BC, in 1317 BCIS cases, 10,645 invasive BC cases, and 14,006 healthy controls in the National Cancer Institute's Breast and Prostate Cancer Cohort Consortium (BPC3). Using unconditional logistic regression models adjusted for age and study, we estimated the association of SNPs with BCIS using two different comparison groups: healthy controls and invasive BC subjects to investigate whether BCIS and BC share a common genetic profile.</p><p>Results: We found that five SNPs (CDKN2BAS-rs1011970, FGFR2-rs3750817, FGFR2-rs2981582, TNRC9-rs3803662, 5p12-rs10941679) were significantly associated with BCIS risk (P value adjusted for multiple comparisons &lt;0.0016). Comparing invasive BC and BCIS, the largest difference was for CDKN2BAS-rs1011970, which showed a positive association with BCIS (OR = 1.24, 95 % CI: 1.11-1.38, P = 1.27 x 10(-4)) and no association with invasive BC (OR = 1.03, 95 % CI: 0.99-1.07, P = 0.06), with a P value for case-case comparison of 0.006. Subgroup analyses investigating associations with ductal carcinoma in situ (DCIS) found similar associations, albeit less significant (OR = 1.25, 95 % CI: 1.09-1.42, P = 1.07 x 10(-3)). Additional risk analyses showed significant associations with invasive disease at the 0.05 level for 28 of the alleles and the OR estimates were consistent with those reported by other studies.</p><p>Conclusions: Our study adds to the knowledge that several of the known BC susceptibility loci are risk factors for both BCIS and invasive BC, with the possible exception of rs1011970, a putatively functional SNP situated in the CDKN2BAS gene that may be a specific BCIS susceptibility locus.</p>
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