Germline variants in hereditary breast cancer genes are associated with early age at diagnosis and family history in Guatemalan breast cancer

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Megan Ren
  • Anali Orozco
  • Kang Shao
  • Anaseidy Albanez
  • Jeremy Ortiz
  • Boyang Cao
  • Lilian Barreda
  • Christian S. Alvarez
  • Lisa Garland
  • Dongjing Wu
  • Charles C. Chung
  • Jiahui Wang
  • Megan Frone
  • Sergio Ralon
  • Victor Argueta
  • Roberto Orozco
  • Eduardo Gharzouzi
  • Michael Dean

Detail(s)

Original languageEnglish
Journal / PublicationBreast Cancer Research and Treatment
Volume189
Issue number2
Online published1 Jul 2021
Publication statusPublished - Sep 2021

Link(s)

Abstract

Purpose Mutations in hereditary breast cancer genes play an important role in the risk for cancer. 
Methods Cancer susceptibility genes were sequenced in 664 unselected breast cancer cases from Guatemala. Variants were annotated with ClinVar and VarSome. 
Results A total of 73 out of 664 subjects (11%) had a pathogenic variant in a high or moderate penetrance gene. The most frequently mutated genes were BRCA1 (37/664, 5.6%) followed by BRCA2 (15/664, 2.3%), PALB2 (5/664, 0.8%), and TP53 (5/664, 0.8%). Pathogenic variants were also detected in the moderate penetrance genes ATM, BARD1, CHEK2, and MSH6. The high ratio of BRCA1/BRCA2 mutations is due to two potential founder mutations: BRCA1 c.212 + 1G > A splice mutation (15 cases) and BRCA1 c.799delT (9 cases). Cases with pathogenic mutations had a significantly earlier age at diagnosis (45 vs 51 years, P < 0.001), are more likely to have had diagnosis before menopause, and a higher percentage had a relative with any cancer (51% vs 37%, P = 0.038) or breast cancer (33% vs 15%, P < 0.001). 
Conclusions Hereditary breast cancer mutations were observed among Guatemalan women, and these women are more likely to have early age at diagnosis and family history of cancer. These data suggest the use of genetic testing in breast cancer patients and those at high risk as part of a strategy to reduce breast cancer mortality in Guatemala.

Research Area(s)

  • BRCA1 gene, BRCA2 gene, Health disparities, Hispanic, Latin America, Pathogenic mutation

Citation Format(s)

Germline variants in hereditary breast cancer genes are associated with early age at diagnosis and family history in Guatemalan breast cancer. / Ren, Megan; Orozco, Anali; Shao, Kang; Albanez, Anaseidy; Ortiz, Jeremy; Cao, Boyang; Wang, Lusheng; Barreda, Lilian; Alvarez, Christian S.; Garland, Lisa; Wu, Dongjing; Chung, Charles C.; Wang, Jiahui; Frone, Megan; Ralon, Sergio; Argueta, Victor; Orozco, Roberto; Gharzouzi, Eduardo; Dean, Michael.

In: Breast Cancer Research and Treatment, Vol. 189, No. 2, 09.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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