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Article

Preliminary results of targeted sequencing of BRCA1 and BRCA2 in a cohort of breast cancer families: New insight into pathogenic variants in patients and at‑risk relatives

  • Authors:
    • Marwa H. Saied
    • Dalal Elkaffash
    • Reham Fadl
    • Reham Abdel Haleem
    • Amal Refeat
    • Inas Ibrahim
    • Mona Tahoun
    • Alyaa Elkayal
    • Eman Tayae
  • View Affiliations / Copyright

    Affiliations: Department of Clinical Pathology, Faculty of Medicine, Alexandria University, Alexandria 21131, Egypt, Department of Pathology, Faculty of Medicine, Alexandria University, Alexandria 21131, Egypt
  • Article Number: 678
    |
    Published online on: July 23, 2021
       https://doi.org/10.3892/mmr.2021.12317
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Abstract

Breast cancer (BC) is the most commonly diagnosed cancer worldwide and a major health concern in Egypt. There is a known association between pathogenic variants identified in breast cancer susceptibility gene (BRCA)1 and 2 and the risk of developing BC. However, the number of studies investigating mutations in BRCA1 and BRCA2 in Egypt remains limited. Thus, the aim of the present study was to investigate the frequency of BRCA1 and BRCA2 variants in patients with BC and their relatives. For this purpose, 11 families (11 patients and 16 relatives) were included in the present study. BRCA1 and BRCA2 variants were investigated using the Ion S5 next‑generation sequencer. It was found that pathogenic variants were more frequent in patients with familial BC (FBC) than in those with sporadic BC, with 71% of variants in BRCA2, including the first reported identification of c.9089del, c.5583_5584dup, c.8243G>A and c.7976G>A pathogenic variants in Egyptian patients with BC. Pathogenic variants in relatives were confined to FBC c.1278delA, c.1960_1961del, and c.1224delT, with a higher incidence of variants of uncertain significance (VUS), such as BRCA2 intron 2 c.68‑16delT. Of note, two cold spot benign variants, c.3113A>G and c.4837A>G, were repeatedly found (67%) in patients and relatives. In conclusion, to the best of our knowledge, novel pathogenic variants and VUS in Egyptian patients with BC and their high‑risk relatives were identified for the first time in the present study. These findings should be integrated with other genomic data concerning Egyptian families and carefully interpreted during genetic counseling.
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Copy and paste a formatted citation
Spandidos Publications style
Saied MH, Elkaffash D, Fadl R, Haleem RA, Refeat A, Ibrahim I, Tahoun M, Elkayal A and Tayae E: Preliminary results of targeted sequencing of <em>BRCA1</em> and <em>BRCA2</em> in a cohort of breast cancer families: New insight into pathogenic variants in patients and at‑risk relatives. Mol Med Rep 24: 678, 2021.
APA
Saied, M.H., Elkaffash, D., Fadl, R., Haleem, R.A., Refeat, A., Ibrahim, I. ... Tayae, E. (2021). Preliminary results of targeted sequencing of <em>BRCA1</em> and <em>BRCA2</em> in a cohort of breast cancer families: New insight into pathogenic variants in patients and at‑risk relatives. Molecular Medicine Reports, 24, 678. https://doi.org/10.3892/mmr.2021.12317
MLA
Saied, M. H., Elkaffash, D., Fadl, R., Haleem, R. A., Refeat, A., Ibrahim, I., Tahoun, M., Elkayal, A., Tayae, E."Preliminary results of targeted sequencing of <em>BRCA1</em> and <em>BRCA2</em> in a cohort of breast cancer families: New insight into pathogenic variants in patients and at‑risk relatives". Molecular Medicine Reports 24.3 (2021): 678.
Chicago
Saied, M. H., Elkaffash, D., Fadl, R., Haleem, R. A., Refeat, A., Ibrahim, I., Tahoun, M., Elkayal, A., Tayae, E."Preliminary results of targeted sequencing of <em>BRCA1</em> and <em>BRCA2</em> in a cohort of breast cancer families: New insight into pathogenic variants in patients and at‑risk relatives". Molecular Medicine Reports 24, no. 3 (2021): 678. https://doi.org/10.3892/mmr.2021.12317
Copy and paste a formatted citation
x
Spandidos Publications style
Saied MH, Elkaffash D, Fadl R, Haleem RA, Refeat A, Ibrahim I, Tahoun M, Elkayal A and Tayae E: Preliminary results of targeted sequencing of <em>BRCA1</em> and <em>BRCA2</em> in a cohort of breast cancer families: New insight into pathogenic variants in patients and at‑risk relatives. Mol Med Rep 24: 678, 2021.
APA
Saied, M.H., Elkaffash, D., Fadl, R., Haleem, R.A., Refeat, A., Ibrahim, I. ... Tayae, E. (2021). Preliminary results of targeted sequencing of <em>BRCA1</em> and <em>BRCA2</em> in a cohort of breast cancer families: New insight into pathogenic variants in patients and at‑risk relatives. Molecular Medicine Reports, 24, 678. https://doi.org/10.3892/mmr.2021.12317
MLA
Saied, M. H., Elkaffash, D., Fadl, R., Haleem, R. A., Refeat, A., Ibrahim, I., Tahoun, M., Elkayal, A., Tayae, E."Preliminary results of targeted sequencing of <em>BRCA1</em> and <em>BRCA2</em> in a cohort of breast cancer families: New insight into pathogenic variants in patients and at‑risk relatives". Molecular Medicine Reports 24.3 (2021): 678.
Chicago
Saied, M. H., Elkaffash, D., Fadl, R., Haleem, R. A., Refeat, A., Ibrahim, I., Tahoun, M., Elkayal, A., Tayae, E."Preliminary results of targeted sequencing of <em>BRCA1</em> and <em>BRCA2</em> in a cohort of breast cancer families: New insight into pathogenic variants in patients and at‑risk relatives". Molecular Medicine Reports 24, no. 3 (2021): 678. https://doi.org/10.3892/mmr.2021.12317
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