Casadei S.,University of Washington |
Heikkinen T.,University of Helsinki |
Pylkas K.,University of Oulu |
Roberts J.,University of Cambridge |
And 43 more authors.
New England Journal of Medicine | Year: 2014
BACKGROUND: Germline loss-of-function mutations in PALB2 are known to confer a predisposition to breast cancer. However, the lifetime risk of breast cancer that is conferred by such mutations remains unknown. METHODS: We analyzed the risk of breast cancer among 362 members of 154 families who had deleterious truncating, splice, or deletion mutations in PALB2. The age-specific breast-cancer risk for mutation carriers was estimated with the use of a modified segregation-analysis approach that allowed for the effects of PALB2 genotype and residual familial aggregation. RESULTS: The risk of breast cancer for female PALB2 mutation carriers, as compared with the general population, was eight to nine times as high among those younger than 40 years of age, six to eight times as high among those 40 to 60 years of age, and five times as high among those older than 60 years of age. The estimated cumulative risk of breast cancer among female mutation carriers was 14% (95% confidence interval [CI], 9 to 20) by 50 years of age and 35% (95% CI, 26 to 46) by 70 years of age. Breast-cancer risk was also significantly influenced by birth cohort (P < 0.001) and by other familial factors (P = 0.04). The absolute breast-cancer risk for PALB2 female mutation carriers by 70 years of age ranged from 33% (95% CI, 25 to 44) for those with no family history of breast cancer to 58% (95% CI, 50 to 66) for those with two or more first-degree relatives with breast cancer at 50 years of age. CONCLUSIONS: Loss-of-function mutations in PALB2 are an important cause of hereditary breast cancer, with respect both to the frequency of cancer-predisposing mutations and to the risk associated with them. Our data suggest the breast-cancer risk for PALB2 mutation carriers may overlap with that for BRCA2 mutation carriers. Copyright © 2014 Massachusetts Medical Society.
PubMed | University of New South Wales, University of Queensland, Familial Cancer Center, Royal Melbourne Hospital and 4 more.
Type: Journal Article | Journal: Familial cancer | Year: 2016
Recent research has shown that aspirin reduces the risk of cancers associated with Lynch Syndrome. However, uncertainty exists around the optimal dosage, treatment duration and whether the benefits of aspirin as a risk-reducing medication (RRM) outweigh adverse medication related side-effects. Little is known about clinicians attitudes, current practice, and perceived barriers to recommending aspirin as a RRM. To explore the attitudes of clinicians who discuss risk management options with patients with Lynch Syndrome towards using aspirin as a RRM. Clinicians were invited through professional organisations to complete an online survey. Topics included their clinical experience with Lynch Syndrome, views and practice of recommending aspirin as a RRM, and knowledge about clinical risk management guidelines for Lynch Syndrome. Comparison of attitudes was made between three professional groups. 181 respondents were included in the analysis: 59 genetics professionals (genetic counsellors and clinical geneticists, medical oncologists with specialist training in familial cancer), 49 gastroenterologists and 73 colorectal surgeons. Most clinicians (76%) considered aspirin to be an effective RRM and most (72%) were confident about discussing it. In all professional categories, those who were confident about discussing aspirin with patients perceived it to be an effective RRM (OR=2.8 [95%CI=1.8-4.2], p<0.001). Eighty percent (47/59) of genetics professionals reported having discussed the use of aspirin with Lynch Syndrome patients compared to 69% of gastroenterologists and 68% of colorectal surgeons. Those who considered aspirin as an effective RRM or who felt confident in their knowledge of the aspirin literature were more likely (OR=10 [95%CI=1.5-65], p=0.010, OR=6 [95%CI=2.2-16], p<0.001, respectively) to discuss it with their patients than other professionals in the study. Similarly health professionals who felt confident in their knowledge of literature of aspirin/confident in discussing with the patients were more likely (OR=6 [95%CI=2.2-16], p<0.001) to discuss with their patients. Health professionals who saw more than ten patients with Lynch Syndrome per year were more likely to be confident in their knowledge of the aspirin literature and discussing it with patients (OR=4.1 [95% CI=1.6-10.2], p=0.003). Explicit recommendations to take aspirin, was reported by 65/83 (78%) of health professionals. Eighty-seven percent of health professionals reported a need for patient educational materials about aspirin. Continuing training is needed to increase clinicians confidence in their knowledge of the literature on the use of aspirin as a RRM. Patient education materials may be helpful in improving consistency in patient care and facilitate communication between clinicians and people living with Lynch Syndrome.
PubMed | Civic Mp Arezzo Hospital, Karolinska Institutet, Cancer Research Initiatives Foundation, University of Cologne and 116 more.
Type: | Journal: Nature communications | Year: 2016
Common variants in 94 loci have been associated with breast cancer including 15 loci with genome-wide significant associations (P<5 10(-8)) with oestrogen receptor (ER)-negative breast cancer and BRCA1-associated breast cancer risk. In this study, to identify new ER-negative susceptibility loci, we performed a meta-analysis of 11 genome-wide association studies (GWAS) consisting of 4,939 ER-negative cases and 14,352 controls, combined with 7,333 ER-negative cases and 42,468 controls and 15,252 BRCA1 mutation carriers genotyped on the iCOGS array. We identify four previously unidentified loci including two loci at 13q22 near KLF5, a 2p23.2 locus near WDR43 and a 2q33 locus near PPIL3 that display genome-wide significant associations with ER-negative breast cancer. In addition, 19 known breast cancer risk loci have genome-wide significant associations and 40 had moderate associations (P<0.05) with ER-negative disease. Using functional and eQTL studies we implicate TRMT61B and WDR43 at 2p23.2 and PPIL3 at 2q33 in ER-negative breast cancer aetiology. All ER-negative loci combined account for 11% of familial relative risk for ER-negative disease and may contribute to improved ER-negative and BRCA1 breast cancer risk prediction.
PubMed | Karolinska Institutet, University of Cologne, Breast Cancer Research, University of Houston and 115 more.
Type: Journal Article | Journal: Nature genetics | Year: 2016
We analyzed 3,872 common genetic variants across the ESR1 locus (encoding estrogen receptor ) in 118,816 subjects from three international consortia. We found evidence for at least five independent causal variants, each associated with different phenotype sets, including estrogen receptor (ER(+) or ER(-)) and human ERBB2 (HER2(+) or HER2(-)) tumor subtypes, mammographic density and tumor grade. The best candidate causal variants for ER(-) tumors lie in four separate enhancer elements, and their risk alleles reduce expression of ESR1, RMND1 and CCDC170, whereas the risk alleles of the strongest candidates for the remaining independent causal variant disrupt a silencer element and putatively increase ESR1 and RMND1 expression.
Thompson E.R.,Victorian Breast Cancer Research Consortium Cancer Genetics Laboratory |
Doyle M.A.,Peter MacCallum Cancer Center |
Ryland G.L.,Victorian Breast Cancer Research Consortium Cancer Genetics Laboratory |
Ryland G.L.,Monash Institute of Medical Research |
And 17 more authors.
PLoS Genetics | Year: 2012
Despite intensive efforts using linkage and candidate gene approaches, the genetic etiology for the majority of families with a multi-generational breast cancer predisposition is unknown. In this study, we used whole-exome sequencing of thirty-three individuals from 15 breast cancer families to identify potential predisposing genes. Our analysis identified families with heterozygous, deleterious mutations in the DNA repair genes FANCC and BLM, which are responsible for the autosomal recessive disorders Fanconi Anemia and Bloom syndrome. In total, screening of all exons in these genes in 438 breast cancer families identified three with truncating mutations in FANCC and two with truncating mutations in BLM. Additional screening of FANCC mutation hotspot exons identified one pathogenic mutation among an additional 957 breast cancer families. Importantly, none of the deleterious mutations were identified among 464 healthy controls and are not reported in the 1,000 Genomes data. Given the rarity of Fanconi Anemia and Bloom syndrome disorders among Caucasian populations, the finding of multiple deleterious mutations in these critical DNA repair genes among high-risk breast cancer families is intriguing and suggestive of a predisposing role. Our data demonstrate the utility of intra-family exome-sequencing approaches to uncover cancer predisposition genes, but highlight the major challenge of definitively validating candidates where the incidence of sporadic disease is high, germline mutations are not fully penetrant, and individual predisposition genes may only account for a tiny proportion of breast cancer families. © 2012 Thompson et al.
Thorne H.,Peter MacCallum Cancer Center |
Willems A.J.,Peter MacCallum Cancer Center |
Niedermayr E.,Peter MacCallum Cancer Center |
Hoh I.M.Y.,Peter MacCallum Cancer Center |
And 6 more authors.
Cancer Prevention Research | Year: 2011
The role of a germ-line BRCA2 mutation in the development of prostate cancer is established, but the clinical presentation linked to outcome for this group of men has not been well described. A total of 148 men from 1,423 families were ascertained from the kConFab consortium. Each participant met the following criteria: (i) a verified case of prostate cancer; (ii) confirmed as either a carrier or noncarrier of a family-specific BRCA pathogenicmutation; (iii) comprehensive clinical and treatment data were available. Clinical data were linked to treatment received and overall survival was analyzed by Kaplan-Meier. Prostate cancer in men from breast cancer-prone families has a high risk of disease progression, irrespective of mutation status. BRCA2 mutation carriers have an increased risk of death and prostate cancer-related death [HR (95% CI) 4.5 (2.12-9.52), P = 8.9 × 10-5] by comparison with noncarriers. Serum PSA readings taken prior to diagnosis in 90% of all men, age adjusted, were above clinical significance. Following D'Amico risk stratification, 77.5% of BRCA2 mutation carriers and 58.7% of noncarriers had high-risk disease. BRCA2 mutation status was also an independent prognostic indicator of overall survival. Furthermore, there was a poor overall survival outcome for both the BRCA2 mutation carriers and noncarriers given curative-intent treatment. All men in breast cancer-prone families are at risk of developing aggressive prostate cancer. This information is significant and should be included in discussions with genetic counselors and medical professionals when discussing prostate cancer treatment options for men in these families, irrespective of mutation status. ©2011 AACR.