The Value of BRCA 1 Gene Mutation in Patients with Breast Cancer

Document Type : Original Article

Authors

1 Department, of Clinical Pathology, Faculty of Medicine, Sohag University.

2 Department of Clinical Pathology,Faculty of Medicine, Sohag University.

Abstract

Introduction: Breast cancer (BC) is the most common malignant tumor in females in almost all of countries with highest age-adjusted incidence in developed countries (73%) and includes the 23% of all types of cancers. World Health Organization (WHO) report shows that this prevalence rising 2% per year. As a matter of fact, BC is responsible for most of deaths due to cancer in women all over the world. According to surveys which were globally conducted, the overall rate of BC is higher in American and European women compared to the Asian, and it may be related to the life style of Asian population.
Aim of the work: Aim of this work was to determine the diagnostic value of BRCA1 gene mutations in female patients with breast cancer, also to correlate them with the presence or absence of family history of breast cancer and to allow identification of individuals at high risk.
Patients and Methods: The study was carried on fifty women, included twenty-five female patients with   breast cancer presented to Medical Oncology Department at Sohag University Hospital from 2015 to 2017, their age ranged from (25-70 years). Patients were diagnosed by clinical examination and confirmed by mammography and surgical biopsies; fine needle aspiration cytology (FNAC) or core needle biopsy (CNB) and CA15-3. Other twenty-five women were healthy control not relatives to the patients.
Results: Our study suggested that the prevalence of BRCA 1 mutations is lower in Sohag
Conclusion: Also, the low percentage of the 185delAG mutation in BRCA1 in BC suggested that is insufficient to justify screening in the Egyptian population. Our study suggested that the prevalence of BRCA 1 mutations is lower in Sohag. So, complete BRCA 1 genes sequence analysis might be required for identification of specific mutation in Egyptian.

Keywords


1. Parkin DM, Bray F, Ferlay J, Pisani P. Global cancer statistics, 2002. CA: a cancer journal for clinicians. 2005;55(2):74-108.
2. Silva SN, Tomar M, Paulo C, Gomes BC, Azevedo AP, Teixeira V, et al. Breast cancer risk and common single nucleotide polymorphisms in homologous recombination DNA repair pathway genes XRCC2, XRCC3, NBS1 and RAD51. Cancer epidemiology. 2010;34(1):85-92.
3. Kirchhoff T, Gaudet MM, Antoniou AC, McGuffog L, Humphreys MK, Dunning AM, et al. Breast cancer risk and 6q22.33: combined results from Breast Cancer Association Consortium and Consortium of Investigators on Modifiers of BRCA1/2. PloS one. 2012;7(6):e35706.
4. Jeyasekharan AD, Liu Y, Hattori H, Pisupati V, Jonsdottir AB, Rajendra E, et al. A cancer-associated BRCA2 mutation reveals masked nuclear export signals controlling localization. Nature structural & molecular biology. 2013;20(10):1191-8.
5. Knudson AG. Two genetic hits (more or less) to cancer. Nature reviews Cancer. 2001;1(2):157-62.
6. Jalkh N, Nassar-Slaba J, Chouery E, Salem N, Uhrchammer N, Golmard L, et al. Prevalance of BRCA1 and BRCA2 mutations in familial breast cancer patients in Lebanon. Hereditary cancer in clinical practice. 2012;10(1):7.
7. Peto J, Collins N, Barfoot R, Seal S, Warren W, Rahman N, et al. Prevalence of BRCA1 and BRCA2 gene mutations in patients with early-onset breast cancer. Journal of the National Cancer Institute. 1999;91(11):943-9.
8. Hall MJ, Reid JE, Burbidge LA, Pruss D, Deffenbaugh AM, Frye C, et al. BRCA1 and BRCA2 mutations in women of different ethnicities undergoing testing for hereditary breast-ovarian cancer. Cancer. 2009;115(10):2222-33.
9. Uhrhammer N, Abdelouahab A, Lafarge L, Feillel V, Ben Dib A, Bignon YJ. BRCA1 mutations in Algerian breast cancer patients: high frequency in young, sporadic cases. International journal of medical sciences. 2008;5(4):197-202.
10. Liede A, Malik IA, Aziz Z, Rios Pd Pde L, Kwan E, Narod SA. Contribution of BRCA1 and BRCA2 mutations to breast and ovarian cancer in Pakistan. American journal of human genetics. 2002;71(3):595-606.
11. Bener A, Ayoubi HR, Ali AI, Al-Kubaisi A, Al-Sulaiti H. Does consanguinity lead to decreased incidence of breast cancer? Cancer epidemiology. 2010;34(4):413-8.
12. Fattahi MJ, Mojtahedi Z, Karimaghaee N, Talei AR, Banani SJ, Ghaderi A. Analysis of BRCA1 and BRCA2 mutations in southern Iranian Breast cancer patients. Archives of Iranian medicine. 2009;12(6):584-7.
13. Gomes MC, Costa MM, Borojevic R, Monteiro AN, Vieira R, Koifman S, et al. Prevalence of BRCA1 and BRCA2 mutations in breast cancer patients from Brazil. Breast cancer research and treatment. 2007;103(3):349-53.
14. Juwle A, Saranath D. BRCA1/BRCA2 gene mutations/SNPs and BRCA1 haplotypes in early-onset breast cancer patients of Indian ethnicity. Medical oncology. 2012;29(5):3272-81.
15. Saxena S, Chakraborty A, Kaushal M, Kotwal S, Bhatanager D, Mohil RS, et al. Contribution of germline BRCA1 and BRCA2 sequence alterations to breast cancer in Northern India. BMC medical genetics. 2006;7:75.
16. Vaidyanathan K, Lakhotia S, Ravishankar HM, Tabassum U, Mukherjee G, Somasundaram K. BRCA1 and BRCA2 germline mutation analysis among Indian women from south India: identification of four novel mutations and high-frequency occurrence of 185delAG mutation. Journal of biosciences. 2009;34(3):415-22.
17. Ahn SH, Hwang UK, Kwak BS, Yoon HS, Ku BK, Kang HJ, et al. Prevalence of BRCA1 and BRCA2 mutations in Korean breast cancer patients. Journal of Korean medical science. 2004;19(2):269-74.
18. Malone KE, Daling JR, Neal C, Suter NM, O'Brien C, Cushing-Haugen K, et al. Frequency of BRCA1/BRCA2 mutations in a population-based sample of young breast carcinoma cases. Cancer. 2000;88(6):1393-402.
19. Frank TS, Deffenbaugh AM, Reid JE, Hulick M, Ward BE, Lingenfelter B, et al. Clinical characteristics of individuals with germline mutations in BRCA1 and BRCA2: analysis of 10,000 individuals. Journal of clinical oncology : official journal of the American Society of Clinical Oncology. 2002;20(6):1480-90.