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Novel germline mutations in BRCA2 gene among 96 hereditary breast and breast–ovarian cancer families from Kerala, South India

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Abstract

Purpose

Aim of the present study was to identify the genetic heterogeneity, prevalence and frequency of germline mutations of BRCA2 gene in Hereditary Breast/Ovarian cancer patients from Kerala, South India.

Methods

We analyzed 102 Breast/Ovarian cancer patients from 96 breast and/ovarian cancer families for BRCA2 gene mutations using Conformation-Sensitive Gel Electrophoresis (CSGE) followed by sequencing.

Results

Sequence variations in BRCA2 gene were detected in 27 (26.4%) patients. Sixteen distinct sequence variants were detected of which 11 were (69%) in exon 11. We have identified two novel disease-causing frameshift mutations (c.4642delAA and c.4926insGACC) in two unrelated patients. Apart from this, fourteen distinct sequence variants were detected in 25 breast/ovarian cancer patients of which 8 (57%) were also novel. These include nine missense mutations, one silent mutation, one-nonsense mutation and three intronic variants.

Conclusions

The results of this study suggest that germline mutations of BRCA2 gene account for rather small proportion of Hereditary Breast/Ovarian cancer in Kerala, South India.

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Acknowledgments

We are deeply indebted to the patients who accepted to participate in this study. The first author is a recipient of Senior Research Fellowship from Indian Council of Medical Research (ICMR).

Author information

Correspondence to Ravindran Ankathil.

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Syamala, V., Sreeja, L., Syamala, V.S. et al. Novel germline mutations in BRCA2 gene among 96 hereditary breast and breast–ovarian cancer families from Kerala, South India. J Cancer Res Clin Oncol 133, 867–874 (2007). https://doi.org/10.1007/s00432-007-0229-6

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Keywords

  • BRCA2
  • Breast cancer
  • Ovarian cancer
  • Germline mutations
  • CSGE
  • HBOC Families