BRCA1 and BRCA2 genes mutations among high risk breast cancer patients in Jordan

Sci Rep. 2020 Oct 16;10(1):17573. doi: 10.1038/s41598-020-74250-2.

Abstract

Familial breast cancer is estimated to account for 15-20% of all cases of breast cancer. Surveillance for familial breast cancer is well-established world-wide. However, this service does not exist in Jordan, due to the scarcity of information with regard to the genetic profiling of these patients, and therefore lack of recommendations for policy-makers. As such, patients with very strong family history of breast or ovarian cancers are not screened routinely; leading to preventable delay in diagnosis. Whole coding sequencing for BCRA1/BCRA2 using next-generation sequencing (NGS)/Ion PGM System was performed. Sanger sequencing were then used to confirm the pathogenic variants detected by NGS. In this study, 192 breast cancer patients (and 8 ovarian cancer cases) were included. The prevalence of recurrent pathogenic mutations was 14.5%, while the prevalence of newly detected mutations was 3.5%. Two novel pathogenic mutations were identified in BRCA2 genes. The common mutations in the Ashkenazi population used for screening may not apply in the Jordanian population, as previously reported mutations were not prevalent, and other new mutations were identified. These data will aid to establish a specific screening test for BRCA 1/BRCA2 in the Jordanian population.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Age of Onset
  • Aged
  • BRCA1 Protein / genetics*
  • BRCA2 Protein / genetics*
  • Breast Neoplasms / epidemiology
  • Breast Neoplasms / genetics*
  • Breast Neoplasms, Male / epidemiology
  • Breast Neoplasms, Male / genetics
  • DNA, Neoplasm / genetics
  • Early Detection of Cancer
  • Female
  • Genes, BRCA2*
  • Genetic Predisposition to Disease
  • High-Throughput Nucleotide Sequencing
  • Humans
  • Jordan / epidemiology
  • Male
  • Middle Aged
  • Mutation*
  • Neoplasms, Multiple Primary / epidemiology
  • Neoplasms, Multiple Primary / genetics
  • Ovarian Neoplasms / epidemiology
  • Ovarian Neoplasms / genetics*
  • Young Adult

Substances

  • BRCA1 Protein
  • BRCA1 protein, human
  • BRCA2 Protein
  • BRCA2 protein, human
  • DNA, Neoplasm