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Li J, He P, Cai Q, Chen L, Wang Y, Cai W, Qiu Y, Liu S, Guo W, Chen M, Lin Y, Wang C, Fu F. Spectrum and characteristics of germline PALB2 pathogenic variants in 1556 early-onset breast cancer patients in China. J Cancer Res Clin Oncol 2024; 150:322. [PMID: 38914840 PMCID: PMC11196361 DOI: 10.1007/s00432-024-05758-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Accepted: 04/22/2024] [Indexed: 06/26/2024]
Abstract
PURPOSE Limited data are available regarding the partner and localizer of BRCA2 (PALB2) in Chinese patients with early breast cancer. This study aimed to assess the spectrum and characteristics of germline PALB2 pathogenic variants in this population. METHODS Peripheral blood samples were collected from 1556 patients diagnosed with BRCA1/2-negative early-onset breast cancer. All coding regions and exon‒intron boundaries of the PALB2 genes were screened through next-generation sequencing. RESULTS The prevalence of PALB2 pathogenic variants was approximately 0.77% in the cohort. Eleven PALB2 pathogenic variants were identified in twelve participants, including five frameshift mutations and six nonsense mutations. All other variants were detected once, except for PALB2 c.1056_1057del (detected twice). Two PALB2 carriers (2/12, 16.7%) have documented family history of breast cancer and/or ovarian cancer. Patients with a positive family history exhibited a threefold higher possibility of being identified as PALB2 carriers than those without a family history (2% vs. 0.69%), although the difference was not statistically significant (p = 0.178). Compared to non-carriers, PALB2 carriers has a tendency to appear in younger age (≤ 30 years) (25% vs 14.4%), human epidermal growth factor receptor-2 (HER2)-negative status (83.3% vs. 70.2%), and diagnosed with invasive micropapillary carcinoma (16.7% vs 3.1%). CONCLUSION The prevalence of the germline PALB2 pathogenic variants was approximately 0.77% in Chinese patients with BRCA1/2-negative early-onset breast cancer. Our findings is crucial for understanding population-specific genetic risks and offering insights that can enhance genetic counseling and genetic testing strategies in this population.
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Affiliation(s)
- Jing Li
- Department of Breast Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Breast Cancer Institute, Fujian Medical University, Fuzhou, 350001, Fujian Province, China
| | - Peng He
- Department of Breast Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Breast Cancer Institute, Fujian Medical University, Fuzhou, 350001, Fujian Province, China
| | - Qindong Cai
- Department of Breast Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Breast Cancer Institute, Fujian Medical University, Fuzhou, 350001, Fujian Province, China
| | - Lili Chen
- Department of Breast Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Breast Cancer Institute, Fujian Medical University, Fuzhou, 350001, Fujian Province, China
| | - Yali Wang
- Department of Breast Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Breast Cancer Institute, Fujian Medical University, Fuzhou, 350001, Fujian Province, China
| | - Weifeng Cai
- Department of Breast Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Breast Cancer Institute, Fujian Medical University, Fuzhou, 350001, Fujian Province, China
| | - Yibin Qiu
- Department of Breast Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Breast Cancer Institute, Fujian Medical University, Fuzhou, 350001, Fujian Province, China
| | - Shunyi Liu
- Department of Breast Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Breast Cancer Institute, Fujian Medical University, Fuzhou, 350001, Fujian Province, China
| | - Wenhui Guo
- Department of Breast Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Breast Cancer Institute, Fujian Medical University, Fuzhou, 350001, Fujian Province, China
| | - Minyan Chen
- Department of Breast Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Breast Cancer Institute, Fujian Medical University, Fuzhou, 350001, Fujian Province, China
| | - Yuxiang Lin
- Department of Breast Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Breast Cancer Institute, Fujian Medical University, Fuzhou, 350001, Fujian Province, China
| | - Chuan Wang
- Department of Breast Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China.
- Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China.
- Breast Cancer Institute, Fujian Medical University, Fuzhou, 350001, Fujian Province, China.
| | - Fangmeng Fu
- Department of Breast Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, China
- Breast Cancer Institute, Fujian Medical University, Fuzhou, 350001, Fujian Province, China
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Zou W, Zhang Q, Sun R, Li X, He S. Study on TFF1 and PALB2 gene variants associated with gastric carcinoma risk in the Chinese Han population. Cancer Epidemiol 2023; 83:102333. [PMID: 36758349 DOI: 10.1016/j.canep.2023.102333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 01/09/2023] [Accepted: 01/14/2023] [Indexed: 02/10/2023]
Abstract
OBJECTIVE Gastric carcinoma (GC) has received extensive attention due to its complex pathogenesis. Studies have shown that the expression of Trefoil factor 1 (TFF1) and Partner and localiser of BRCA2 (PALB2) genes promotes the occurrence of GC. Therefore, we investigated whether TFF1 and PALB2 gene polymorphisms are associated with GC risk in the Chinese Han population. METHODS A total of 509 GC cases and 505 controls were recruited, and single nucleotide polymorphisms (SNPs) of TFF1 and PALB2 in these subjects were genotyped. The association between each candidate polymorphism and GC risk was assessed by calculating odds ratios (ORs) and 95% confidence intervals (CIs). The visualization of gene-gene interactions and functional enrichment analysis were then performed using Cytoscape software and the R package "cluster profile". RESULTS The TFF1 rs2156310 polymorphism significantly reduced the predisposition to GC in people under 60 years of age (AA vs. AG - GG, OR = 0.58, 95% CI = 0.35-0.97, p = 0.036). The gender-stratified analysis found that PALB2 rs513313 was significantly associated with the risk of GC in males (CT vs. TT, OR = 1.51, 95% CI = 1.06-2.15, p = 0.022). Besides, PALB2 rs249954 significantly reduced the susceptibility to GC in females (AA vs GG, OR = 0.42, 95% CI = 0.19-0.94, p = 0.034). CONCLUSION Our results revealed that TFF1 and PALB2 gene polymorphisms were correlated with the genetic susceptibility to GC, providing certain data support for researchers to further study the mechanism of GC.
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Affiliation(s)
- Wenjing Zou
- Department of Digestive Internal Medicine, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China; Department of Digestive Internal Medicine, Xi'an Fifth Hospital, Xi'an 710082, China
| | - Qian Zhang
- Department of First Internal Medicine, Shaanxi Province Cancer Hospital, Xi'an 710061, China
| | - Ruifang Sun
- Department of Pathology, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - Xu Li
- Department of Sixth Internal Medicine, Shaanxi Province Cancer Hospital, Xi'an 710061, China.
| | - Shuixiang He
- Department of Digestive Internal Medicine, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China.
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Courant F, Bougras-Cartron G, Abadie C, Frenel JS, Cartron PF. Modulation of DNA Methylation/Demethylation Reactions Induced by Nutraceuticals and Pollutants of Exposome Can Promote a C > T Mutation in the Breast Cancer Predisposing Gene PALB2. EPIGENOMES 2022; 6:epigenomes6040032. [PMID: 36278678 PMCID: PMC9590087 DOI: 10.3390/epigenomes6040032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 09/15/2022] [Accepted: 09/21/2022] [Indexed: 11/26/2022] Open
Abstract
Background: Deregulation of DNA methylation/demethylation reactions may be the source of C > T mutation via active deamination of 5-methylcytosine to thymine. Exposome, that is to say, the totality of exposures to which an individual is subjected during their life, can deregulate these reactions. Thus, one may wonder whether the exposome can induce C > T mutations in the breast cancer-predisposing gene PALB2. Methods: Our work is based on the exposure of MCF10A mammary epithelial cells to seven compounds of our exposome (folate, Diuron, glyphosate, PFOA, iron, zinc, and ascorbic acid) alone or in cocktail. The qMSRE and RMS techniques were used to study the impact of these exposures on the level of methylation and mutation of the PALB2 gene. Results: Here, we have found that exposome compounds (nutriments, ions, pollutants) promoting the cytosine methylation and the 5-methylcytosine deamination have the ability to promote a specific C > T mutation in the PALB2 gene. Interestingly, we also noted that the addition of exposome compounds promoting the TET-mediated conversion of 5-methylcytosine (Ascorbic acid and iron) abrogates the presence of C > T mutation in the PALB2 gene. Conclusions: Our study provides a proof of concept supporting the idea that exposomes can generate genetic mutation by affecting DNA methylation/demethylation.
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Affiliation(s)
- Florestan Courant
- Nantes Université, Inserm, CNRS, Université d’Angers, CRCI2NA, 44000 Nantes, France
- SIRIC ILIAD, 44000 Nantes, France
| | - Gwenola Bougras-Cartron
- Nantes Université, Inserm, CNRS, Université d’Angers, CRCI2NA, 44000 Nantes, France
- SIRIC ILIAD, 44000 Nantes, France
- Institut de Cancérologie de l’Ouest, 44800 Saint-Herblain, France
| | - Caroline Abadie
- Institut de Cancérologie de l’Ouest, 44800 Saint-Herblain, France
| | - Jean-Sébastien Frenel
- Nantes Université, Inserm, CNRS, Université d’Angers, CRCI2NA, 44000 Nantes, France
- SIRIC ILIAD, 44000 Nantes, France
- Institut de Cancérologie de l’Ouest, 44800 Saint-Herblain, France
| | - Pierre-François Cartron
- Nantes Université, Inserm, CNRS, Université d’Angers, CRCI2NA, 44000 Nantes, France
- SIRIC ILIAD, 44000 Nantes, France
- Institut de Cancérologie de l’Ouest, 44800 Saint-Herblain, France
- Correspondence:
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Lehrer S, Rheinstein PH. EARS2 significantly coexpresses with PALB2 in breast and pancreatic cancer. Cancer Treat Res Commun 2022; 32:100595. [PMID: 35779338 PMCID: PMC9427692 DOI: 10.1016/j.ctarc.2022.100595] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 06/14/2022] [Accepted: 06/20/2022] [Indexed: 11/23/2022]
Abstract
BACKGROUND PALB2 (BRCA2 partner and localizer) is a BRCA2-interacting protein that is required for BRCA2 genome caretaker tasks and interacts with BRCA1. Women with PALB2 mutation have a 40% to 60% higher risk of breast cancer, almost equivalent to women who have BRCA mutations. PALB2 mutation may also increase the risk of pancreatic cancer. New guidelines for PALB2 mutation in breast cancer advise pancreatic cancer screening, which includes M.R.I.s of the pancreas as well as endoscopic ultrasonography, for women who have a family history of pancreatic cancer. Using the Cancer Genome Atlas (TCGA) and The Human Protein Atlas we examined genes that co-express with PALB2 in breast and pancreatic cancer. METHODS We used cBioPortal for Cancer Genomics to analyze data in TCGA. cBioPortal provides visualization, analysis and download of large-scale cancer genomics data sets. We used the UCSC Xena Browser to additionally analyze gene expression in TCGA. RESULTS Six genes, EARS2, ARL6IP1, DNAJA3, KNOP1, RPUSD1, and TMEM186, significantly coexpressed with PALB2 in both breast and pancreatic cancer. Glutamyl-tRNA synthetase 2 (EARS2) was the only gene coexpressing with PALB2 in the breast and pancreatic cancer subjects that was significantly related to pancreatic cancer survival. Elevated PALB2 and EARS2 gene expression are both significantly associated with the PAM50 Luminal B subtype and high risk of recurrence, suggesting why these women may need active intervention, such as prophylactic mastectomy. CONCLUSIONS EARS2 expression might be a risk factor for pancreatic cancer in breast cancer patients with PALB2 mutations. By assessing EARS2 expression in breast tumors, the clinician might obtain a second piece of information that, with family history of pancreatic cancer, could inform the decision to perform pancreatic cancer screening.
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Affiliation(s)
- Steven Lehrer
- Department of Radiation Oncology, Icahn School of Medicine at Mount Sinai, New York, US.
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Clinical utility of testing for PALB2 and CHEK2 c.1100delC in breast and ovarian cancer. Genet Med 2021; 23:1969-1976. [PMID: 34113003 PMCID: PMC8486655 DOI: 10.1038/s41436-021-01234-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 02/17/2021] [Accepted: 05/17/2021] [Indexed: 12/24/2022] Open
Abstract
Purpose To investigate the contribution of PALB2 pathogenic gene variants (PGVs, PALB2_PGV) and the CHEK2 c.1100delC (CHEK2_1100delC) PGV to familial breast and ovarian cancer, and PALB2_PGV associated breast cancer pathology. Methods Outcomes of germline PALB2_PGV and CHEK2_1100delC testing were recorded in 3,127 women with histologically confirmed diagnoses of invasive breast cancer, carcinoma in situ, or epithelial nonmucinous ovarian cancer, and 1,567 female controls. Breast cancer pathology was recorded in PALB2_PGV cases from extended families. Results Thirty-five PALB2 and 44 CHEK2_1100delC PGVs were detected in patients (odds ratio [OR] PALB2 breast–ovarian = 5.90 [95% CI: 1.92–18.36], CHEK2 breast–ovarian = 4.46 [95% CI: 1.86–10.46], PALB2 breast = 6.16 [95% CI: 1.98–19.21], CHEK2 breast = 4.89 [95% CI: 2.01–11.34]). Grade 3 ER-positive HER2-negative, grade 3 and triple negative (TN) tumors were enriched in cases with PALB2 PGVs compared with all breast cancers known to our service (respectively: 15/43, 254/1,843, P = 0.0005; 28/37, 562/1,381, P = 0.0001; 12/43, 204/1,639, P < 0.0001). PALB2_PGV likelihood increased with increasing Manchester score (MS) (MS < 15 = 17/1,763, MS 20–39 = 11/520, P = 0.04) but not for CHEK2_1100delC (MS < 15 = 29/1,762, MS 20–39 = 4/520). PALB2 PGVs showed perfect segregation in 20/20 first-degree relatives with breast cancer, compared with 7/13 for CHEK2_1100delC (P = 0.002). Conclusion PALB2 PGVs and CHEK2_1100delC together account for ~2.5% of familial breast/ovarian cancer risk. PALB2 PGVs are associated with grade 3, TN, and grade 3 ER-positive HER2-negative breast tumors.
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Doddato G, Valentino F, Giliberti A, Papa FT, Tita R, Bruno LP, Resciniti S, Fallerini C, Benetti E, Palmieri M, Mencarelli MA, Fabbiani A, Bruttini M, Orrico A, Baldassarri M, Fava F, Lopergolo D, Lo Rizzo C, Lamacchia V, Mannucci S, Pinto AM, Curr A, Mancini V, Mari F, Renieri A, Ariani F. Whole Exome Sequencing in BRCA1-2 Candidate Families: The Contribution of Other Cancer Susceptibility Genes. Front Oncol 2021; 11:649435. [PMID: 34026625 PMCID: PMC8139251 DOI: 10.3389/fonc.2021.649435] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 04/06/2021] [Indexed: 12/14/2022] Open
Abstract
Hereditary Breast and Ovarian Cancer (HBOC) syndrome is a condition in which the risk of breast and ovarian cancer is higher than in the general population. The prevalent pathogenesis is attributable to inactivating variants of the BRCA1-2 highly penetrant genes, however, other cancer susceptibility genes may also be involved. By Exome Sequencing (ES) we analyzed a series of 200 individuals selected for genetic testing in BRCA1-2 genes according to the updated National Comprehensive Cancer Network (NCCN) guidelines. Analysis by MLPA was performed to detect large BRCA1-2 deletions/duplications. Focusing on BRCA1-2 genes, data analysis identified 11 cases with pathogenic variants (4 in BRCA1 and 7 in BRCA1-2) and 12 with uncertain variants (7 in BRCA1 and 5 in BRCA2). Only one case was found with a large BRCA1 deletion. Exome analysis allowed to characterize pathogenic variants in 21 additional genes: 10 genes more traditionally associated to breast and ovarian cancer (ATM, BRIP1, CDH1, PALB2, PTEN, RAD51C, and TP53) (5% diagnostic yield) and 11 in candidate cancer susceptibility genes (DPYD, ERBB3, ERCC2, MUTYH, NQO2, NTHL1, PARK2, RAD54L, and RNASEL). In conclusion, this study allowed a personalized risk assessment and clinical surveillance in an increased number of HBOC families and to broaden the spectrum of causative variants also to candidate “non-canonical” genes.
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Affiliation(s)
- Gabriella Doddato
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Floriana Valentino
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Annarita Giliberti
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Filomena Tiziana Papa
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Rossella Tita
- Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Lucia Pia Bruno
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Sara Resciniti
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Chiara Fallerini
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Elisa Benetti
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Maria Palmieri
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | | | - Alessandra Fabbiani
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy.,Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Mirella Bruttini
- Medical Genetics, University of Siena, Siena, Italy.,Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Alfredo Orrico
- Molecular Diagnosis and Characterization of Pathogenic Mechanisms of Rare Genetic Diseases, Azienda Ospedaliera Universitaria Senese and Clinical Genetics, ASL Toscana SudEst. Ospedale della Misericordia, Grosseto, Italy
| | - Margherita Baldassarri
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Francesca Fava
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy.,Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Diego Lopergolo
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy.,Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Caterina Lo Rizzo
- Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Vittoria Lamacchia
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy.,Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Sara Mannucci
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy.,Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Anna Maria Pinto
- Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Aurora Curr
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy.,Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Virginia Mancini
- Unit of Pathology, Department of Medical Biotechnology, University of Siena, Siena, Italy
| | | | | | - Francesca Mari
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy.,Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Alessandra Renieri
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy.,Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Francesca Ariani
- Medical Genetics, University of Siena, Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy.,Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
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7
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Alter BP, Best AF. Frequency of heterozygous germline pathogenic variants in genes for Fanconi anemia in patients with non-BRCA1/BRCA2 breast cancer: a meta-analysis. Breast Cancer Res Treat 2020; 182:465-476. [PMID: 32488392 DOI: 10.1007/s10549-020-05710-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 05/26/2020] [Indexed: 01/24/2023]
Abstract
PURPOSE Germline pathogenic variants in BRCA1 (FANCD1) and BRCA2 (FANCS) do not explain all familial or sporadic cases with breast cancer. Several reports indicate a role for pathogenic variants in other genes in the Fanconi anemia/breast cancer DNA repair pathway; the strengths of these associations vary widely. Publications from 2006 through 2017 were reviewed to provide a better estimate of the role of pathogenic variants in genes in this pathway in breast cancer. METHODS We identified cohorts and case-control reports describing heterozygous pathogenic variants in Fanconi anemia genes in breast cancer cases with high risk of a germline pathogenic variant in a non-BRCA1/2 breast cancer susceptibility gene ("familial"), and cases unselected for family history ("unselected"). Meta-analysis and meta-regression were used to estimate the frequencies of pathogenic variants in cohorts and the odds ratios (OR) in case-control studies. RESULTS Meta-analysis of more than 100 reports of FANCN/PALB2 in familial breast cancer cases provided an overall pathogenic variant prevalence of 1.29% and an OR of 8.45. The prevalence in unselected cohorts was 0.64%, and the OR was 4.76. Pathogenic variants in FANCJ/BRIP1 had a prevalence of 0.5% in familial cases, and an OR of 1.62; their prevalence in unselected cases was 0.39%. FANCO/RAD51C, FANCP/SLX4, FANCU/XRCC2, FANCD2, and other FA-related genes all had prevalences of ≤ 0.5% among familial cases, and even lower in unselected cases. CONCLUSIONS Heterozygous pathogenic variants in FANCN/PALB2 and possibly FANCJ/BRIP1 may account for 1-2% of familial non-BRCA1/2 breast cancer cases and 0.5-1% of unselected cases. Genetic counseling and testing may be suggested for unaffected relatives.
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Affiliation(s)
- Blanche P Alter
- Clinical Genetics Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, 9609 Medical Center Drive, Room 6E452, Rockville, MD, 20850-9772, USA.
| | - Ana F Best
- Biostatistics Branch, Biometric Research Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, Bethesda, MD, USA
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8
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Germline pathogenic variants in BRCA1, BRCA2, PALB2 and RAD51C in breast cancer women from Argentina. Breast Cancer Res Treat 2019; 178:629-636. [PMID: 31446535 DOI: 10.1007/s10549-019-05411-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 08/13/2019] [Indexed: 01/30/2023]
Abstract
PURPOSE Each year, 17,000 new breast cancer cases are diagnosed in Argentina, and 5400 women die of breast cancer. The contribution of cancer-related mutations to the incidence of breast cancer in Argentina has not yet been explored. METHODS We sequenced the entire coding regions of BRCA1, BRCA2, PALB2 and RAD51C in 112 unselected Argentinian breast cancer patients. RESULTS A pathogenic genetic variant was found in 12 of 112 (10.7%) patients; two in BRCA1 (1.8%), five in BRCA2 (4.5%), four in PALB2 (3.6%) and one in RAD51C (0.9%). Three of four (75%) PALB2 mutation carriers carried the same variant (c.1653T > A). CONCLUSIONS A founder mutation in PALB2 accounts for up to 4% of breast cancer patients in Argentina. BRCA1, BRCA2, PALB2 and RAD51C should be included in the genetic testing panel of breast cancer patients in Argentina.
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