Methylation profiling in promoter sequences of ATM and CDKN2A (p14ARF/p16INK4a) genes in blood and cfDNA from women with impalpable breast lesions

  • Authors:
    • Lucas Delmonico
    • Mauricio Augusto Silva Magalhães Costa
    • Romario José Gomes
    • Pâmella de Oliveira Vieira
    • Ana Beatriz Passos da Silva
    • Marcia V. Fournier
    • Luciano Rios Scherrer
    • Carolina Maria de Azevedo
    • Maria Helena Faria Ornellas
    • Gilda Alves
  • View Affiliations

  • Published online on: February 10, 2020     https://doi.org/10.3892/ol.2020.11382
  • Pages: 3003-3010
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Abstract

The objective of the present study was to evaluate the epigenetic changes occurring in early stages of breast cancer. The present study investigated the methylation profile of the ATM, p14ARF and p16INK4a promoters in total blood and plasma cell‑free DNA (cfDNA) from women with impalpable breast lesions compared with in total blood of a control cohort of women without breast lesions. The samples were evaluated using the methylation‑specific PCR method. The Fisher's exact test was used to evaluate statistical significance between the methylation and clinical variables. A total of 111 women were evaluated, including 56 women with impalpable breast cancer (39/56 also had paired plasma cfDNA) and 55 women in the control cohort (55 blood DNA). For blood DNA from women with malignant impalpable breast lesions, p16INK4a exhibited the greatest percentage of methylation (48%), followed by ATM (37.5%) and p14ARF (27%) promoters, regardless of age variation. For plasma cfDNA, the methylation rates for ATM, p14ARF and p16INK4a were 26, 26 and 10%, respectively. The methylation rates for the blood DNA of controls were the lowest for ATM (9%), p14ARF (7%) and p16INK4a (7%). The women with impalpable breast lesions (benign and malignant lesions) exhibited the highest methylation rate, regardless of age, compared with the paired plasma cfDNA and controls. This epigenetic change was statistically significant for the promoters of ATM (P=0.009) and p16INK4a (P=0.001) (impalpable breast lesions vs. control). The present study demonstrated that epigenetic changes occurring in the ATM and CDKN2A genes detectable in liquid biopsy were associated with the development of impalpable breast lesions.
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April-2020
Volume 19 Issue 4

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Spandidos Publications style
Delmonico L, Costa MA, Gomes RJ, Vieira Pd, da Silva AB, Fournier MV, Scherrer LR, de Azevedo CM, Ornellas MH, Alves G, Alves G, et al: Methylation profiling in promoter sequences of ATM and CDKN2A (p14ARF/p16INK4a) genes in blood and cfDNA from women with impalpable breast lesions. Oncol Lett 19: 3003-3010, 2020
APA
Delmonico, L., Costa, M.A., Gomes, R.J., Vieira, P.d., da Silva, A.B., Fournier, M.V. ... Alves, G. (2020). Methylation profiling in promoter sequences of ATM and CDKN2A (p14ARF/p16INK4a) genes in blood and cfDNA from women with impalpable breast lesions. Oncology Letters, 19, 3003-3010. https://doi.org/10.3892/ol.2020.11382
MLA
Delmonico, L., Costa, M. A., Gomes, R. J., Vieira, P. d., da Silva, A. B., Fournier, M. V., Scherrer, L. R., de Azevedo, C. M., Ornellas, M. H., Alves, G."Methylation profiling in promoter sequences of ATM and CDKN2A (p14ARF/p16INK4a) genes in blood and cfDNA from women with impalpable breast lesions". Oncology Letters 19.4 (2020): 3003-3010.
Chicago
Delmonico, L., Costa, M. A., Gomes, R. J., Vieira, P. d., da Silva, A. B., Fournier, M. V., Scherrer, L. R., de Azevedo, C. M., Ornellas, M. H., Alves, G."Methylation profiling in promoter sequences of ATM and CDKN2A (p14ARF/p16INK4a) genes in blood and cfDNA from women with impalpable breast lesions". Oncology Letters 19, no. 4 (2020): 3003-3010. https://doi.org/10.3892/ol.2020.11382