Cancer Research Journal

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Impact of Neoadjuvant Chemotherapy on Breast Cancer Biomarkers: A Guide for Further Adjuvant Treatment

Received: 22 January 2019    Accepted: 27 February 2019    Published: 20 March 2019
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Abstract

Introduction and objective: There is discrepancy in practice worldwide whether testing molecular profile on residual carcinoma is warranted and if treatment options should be modified according to final molecular profile of tumor. Therefore, the current study was conducted to evaluate potential changes in breast biomarkers; estrogen receptor, progesterone receptor, HER-2 and Ki67 expression before and after neoadjuvant chemotherapy in Egyptian patients with breast cancer. Patients and method: a hundred locally advanced (initial clinical stage IIB-IIIC) breast carcinoma patients were treated by one of two protocols of neoadjuvant chemotherapy. First protocol: 4 cycles of AC (adriamycin, cyclophosamide) repeated every 21 days, followed by 12 weeks of paclitaxel. Second protocol: FAC (fluorouracil, adriamycin, cyclophosamide) or FEC (fluorouracil, epirubicin, cyclophosamide) for 6 cycles to be repeated every 21 days. Immunohistochemisty of breast biomarkers were performed on both initial biopsies and also surgical resection specimens for each patient. Result: There was statistically significant change of ER (p=0.03). Fifty five tumors were initially negative and thirty nine became negative after neoadjuvant chemotherapy. The rate of conversion from negative to positive was 14%. Forty seven of tumors were initially negative progesterone receptors (PR) and sixty two became negative after neoadjuvant chemotherapy. PR status showed statistically significant change between before and after neoadjuvant chemotherapy (p=0.04). The rate of conversion of PR from positive to negative was 15%. There is no statistically significant change of HER-2 before and after neoadjuvant chemotherapy (p=0.98). There is statistically significant change from high to low Ki 67 index (p=0.006). Rate of conversion changes of Ki 67 from high to low was 20%. Conclusion: neoadjuvant chemotherapy change receptor status and reduce K i67 expression. This change in hormone receptor status from negative to positive offers new endocrine therapy to this group of patients. Accordingly, reevaluation of hormone receptors after neoadjuvant chemotherapy is required to guide further adjuvant treatment.

DOI 10.11648/j.crj.20190701.12
Published in Cancer Research Journal (Volume 7, Issue 1, March 2019)
Page(s) 8-17
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This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Breast Cancer, Neoadjuvant Chemotherapy, ER, PR, HER2, Ki67

References
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Author Information
  • Clinical Oncology & Nuclear Medicine Department, Mansoura University, Mansoura, Eygpt

  • Pathology Department, Mansoura University, Mansoura, Eygpt

  • Surgical Oncology Department, Oncology Centre, Mansoura University, Mansoura, Eygpt

  • Public Health & Community Medicine Department, Benha University, Benha, Eygpt

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    Ghada Ezzat Eladawei, Dina Abdallah Elnady, Ashraf Khater, Sheref Mohamed El-taher. (2019). Impact of Neoadjuvant Chemotherapy on Breast Cancer Biomarkers: A Guide for Further Adjuvant Treatment. Cancer Research Journal, 7(1), 8-17. https://doi.org/10.11648/j.crj.20190701.12

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    ACS Style

    Ghada Ezzat Eladawei; Dina Abdallah Elnady; Ashraf Khater; Sheref Mohamed El-taher. Impact of Neoadjuvant Chemotherapy on Breast Cancer Biomarkers: A Guide for Further Adjuvant Treatment. Cancer Res. J. 2019, 7(1), 8-17. doi: 10.11648/j.crj.20190701.12

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    AMA Style

    Ghada Ezzat Eladawei, Dina Abdallah Elnady, Ashraf Khater, Sheref Mohamed El-taher. Impact of Neoadjuvant Chemotherapy on Breast Cancer Biomarkers: A Guide for Further Adjuvant Treatment. Cancer Res J. 2019;7(1):8-17. doi: 10.11648/j.crj.20190701.12

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  • @article{10.11648/j.crj.20190701.12,
      author = {Ghada Ezzat Eladawei and Dina Abdallah Elnady and Ashraf Khater and Sheref Mohamed El-taher},
      title = {Impact of Neoadjuvant Chemotherapy on Breast Cancer Biomarkers: A Guide for Further Adjuvant Treatment},
      journal = {Cancer Research Journal},
      volume = {7},
      number = {1},
      pages = {8-17},
      doi = {10.11648/j.crj.20190701.12},
      url = {https://doi.org/10.11648/j.crj.20190701.12},
      eprint = {https://download.sciencepg.com/pdf/10.11648.j.crj.20190701.12},
      abstract = {Introduction and objective: There is discrepancy in practice worldwide whether testing molecular profile on residual carcinoma is warranted and if treatment options should be modified according to final molecular profile of tumor. Therefore, the current study was conducted to evaluate potential changes in breast biomarkers; estrogen receptor, progesterone receptor, HER-2 and Ki67 expression before and after neoadjuvant chemotherapy in Egyptian patients with breast cancer. Patients and method: a hundred locally advanced (initial clinical stage IIB-IIIC) breast carcinoma patients were treated by one of two protocols of neoadjuvant chemotherapy. First protocol: 4 cycles of AC (adriamycin, cyclophosamide) repeated every 21 days, followed by 12 weeks of paclitaxel. Second protocol: FAC (fluorouracil, adriamycin, cyclophosamide) or FEC (fluorouracil, epirubicin, cyclophosamide) for 6 cycles to be repeated every 21 days. Immunohistochemisty of breast biomarkers were performed on both initial biopsies and also surgical resection specimens for each patient. Result: There was statistically significant change of ER (p=0.03). Fifty five tumors were initially negative and thirty nine became negative after neoadjuvant chemotherapy. The rate of conversion from negative to positive was 14%. Forty seven of tumors were initially negative progesterone receptors (PR) and sixty two became negative after neoadjuvant chemotherapy. PR status showed statistically significant change between before and after neoadjuvant chemotherapy (p=0.04). The rate of conversion of PR from positive to negative was 15%. There is no statistically significant change of HER-2 before and after neoadjuvant chemotherapy (p=0.98). There is statistically significant change from high to low Ki 67 index (p=0.006). Rate of conversion changes of Ki 67 from high to low was 20%. Conclusion: neoadjuvant chemotherapy change receptor status and reduce K i67 expression. This change in hormone receptor status from negative to positive offers new endocrine therapy to this group of patients. Accordingly, reevaluation of hormone receptors after neoadjuvant chemotherapy is required to guide further adjuvant treatment.},
     year = {2019}
    }
    

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  • TY  - JOUR
    T1  - Impact of Neoadjuvant Chemotherapy on Breast Cancer Biomarkers: A Guide for Further Adjuvant Treatment
    AU  - Ghada Ezzat Eladawei
    AU  - Dina Abdallah Elnady
    AU  - Ashraf Khater
    AU  - Sheref Mohamed El-taher
    Y1  - 2019/03/20
    PY  - 2019
    N1  - https://doi.org/10.11648/j.crj.20190701.12
    DO  - 10.11648/j.crj.20190701.12
    T2  - Cancer Research Journal
    JF  - Cancer Research Journal
    JO  - Cancer Research Journal
    SP  - 8
    EP  - 17
    PB  - Science Publishing Group
    SN  - 2330-8214
    UR  - https://doi.org/10.11648/j.crj.20190701.12
    AB  - Introduction and objective: There is discrepancy in practice worldwide whether testing molecular profile on residual carcinoma is warranted and if treatment options should be modified according to final molecular profile of tumor. Therefore, the current study was conducted to evaluate potential changes in breast biomarkers; estrogen receptor, progesterone receptor, HER-2 and Ki67 expression before and after neoadjuvant chemotherapy in Egyptian patients with breast cancer. Patients and method: a hundred locally advanced (initial clinical stage IIB-IIIC) breast carcinoma patients were treated by one of two protocols of neoadjuvant chemotherapy. First protocol: 4 cycles of AC (adriamycin, cyclophosamide) repeated every 21 days, followed by 12 weeks of paclitaxel. Second protocol: FAC (fluorouracil, adriamycin, cyclophosamide) or FEC (fluorouracil, epirubicin, cyclophosamide) for 6 cycles to be repeated every 21 days. Immunohistochemisty of breast biomarkers were performed on both initial biopsies and also surgical resection specimens for each patient. Result: There was statistically significant change of ER (p=0.03). Fifty five tumors were initially negative and thirty nine became negative after neoadjuvant chemotherapy. The rate of conversion from negative to positive was 14%. Forty seven of tumors were initially negative progesterone receptors (PR) and sixty two became negative after neoadjuvant chemotherapy. PR status showed statistically significant change between before and after neoadjuvant chemotherapy (p=0.04). The rate of conversion of PR from positive to negative was 15%. There is no statistically significant change of HER-2 before and after neoadjuvant chemotherapy (p=0.98). There is statistically significant change from high to low Ki 67 index (p=0.006). Rate of conversion changes of Ki 67 from high to low was 20%. Conclusion: neoadjuvant chemotherapy change receptor status and reduce K i67 expression. This change in hormone receptor status from negative to positive offers new endocrine therapy to this group of patients. Accordingly, reevaluation of hormone receptors after neoadjuvant chemotherapy is required to guide further adjuvant treatment.
    VL  - 7
    IS  - 1
    ER  - 

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