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Article

Development of recurrence risk score using 95‑gene classifier and its application to formalin‑fixed paraffin‑embedded tissues in ER‑positive, HER2‑negative and node‑negative breast cancer

  • Authors:
    • Yasuto Naoi
    • Yuria Saito
    • Kazuki Kishi
    • Masafumi Shimoda
    • Naofumi Kagara
    • Tomohiro Miyake
    • Tomonori Tanei
    • Kenzo Shimazu
    • Seung Jin Kim
    • Shinzaburo Noguchi
  • View Affiliations / Copyright

    Affiliations: Department of Breast and Endocrine Surgery, Osaka University Graduate School of Medicine, Suita, Osaka 565‑0871, Japan, Sysmex Corporation, Kobe, Hyogo 651‑0073, Japan
  • Pages: 2680-2685
    |
    Published online on: October 7, 2019
       https://doi.org/10.3892/or.2019.7358
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Abstract

We previously developed a 95‑gene classifier (95GC) to classify ER‑positive/HER2‑negative/node‑negative (ER+/HER2‑/N0) breast cancer as high‑ and low‑risk. The present study aimed to devise a 95GC recurrence score (95GCRS) to estimate recurrence risk more precisely and, although the 95GC was originally developed using fresh‑frozen (FF) tissues, this was applied to formalin‑fixed paraffin‑embedded (FFPE) tissues. 95GCRS was calculated using between‑group analysis and denominated as a value from 0 to 100. Correlation of 95GCRS with distant recurrence rate and response to neoadjuvant chemotherapy (NAC) was evaluated in 257 patients with ER+/HER2−/N0 breast cancer treated with adjuvant hormonal therapy at Osaka University Hospital and in 425 patients with ER+ breast cancer treated with NAC at Osaka University Hospital and the University of Texas MD Anderson Cancer Center (GSE25066 dataset). Correlation of 95GCRS between FF and FFPE tissues was evaluated in paired tissues from 56 ER+/HER2‑/N0 breast cancer types obtained from patients without NAC treatment. Distant recurrence rates were remarkably low in patients with 95GCRS ≤50 and increased proportionally in patients with 95GCRS >50. Pathological complete response (pCR) rates to NAC were increased in proportion to 95GCRS, indicating a greater sensitivity of breast cancers with high 95GCRS to chemotherapy. 95GCRS was highly correlated (R=0.92) between FF and FFPE tissues, and the concordance rate (94.6%) of high‑ and low‑risk groups was also considerably high. Overall, the present study developed a 95GCRS that correlated with distant recurrence rate and pCR rate to NAC. The 95GC was applicable to FFPE tissues with a high concordance rate in FF tissues.
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Copy and paste a formatted citation
Spandidos Publications style
Naoi Y, Saito Y, Kishi K, Shimoda M, Kagara N, Miyake T, Tanei T, Shimazu K, Kim SJ, Noguchi S, Noguchi S, et al: Development of recurrence risk score using 95‑gene classifier and its application to formalin‑fixed paraffin‑embedded tissues in ER‑positive, HER2‑negative and node‑negative breast cancer. Oncol Rep 42: 2680-2685, 2019.
APA
Naoi, Y., Saito, Y., Kishi, K., Shimoda, M., Kagara, N., Miyake, T. ... Noguchi, S. (2019). Development of recurrence risk score using 95‑gene classifier and its application to formalin‑fixed paraffin‑embedded tissues in ER‑positive, HER2‑negative and node‑negative breast cancer. Oncology Reports, 42, 2680-2685. https://doi.org/10.3892/or.2019.7358
MLA
Naoi, Y., Saito, Y., Kishi, K., Shimoda, M., Kagara, N., Miyake, T., Tanei, T., Shimazu, K., Kim, S. J., Noguchi, S."Development of recurrence risk score using 95‑gene classifier and its application to formalin‑fixed paraffin‑embedded tissues in ER‑positive, HER2‑negative and node‑negative breast cancer". Oncology Reports 42.6 (2019): 2680-2685.
Chicago
Naoi, Y., Saito, Y., Kishi, K., Shimoda, M., Kagara, N., Miyake, T., Tanei, T., Shimazu, K., Kim, S. J., Noguchi, S."Development of recurrence risk score using 95‑gene classifier and its application to formalin‑fixed paraffin‑embedded tissues in ER‑positive, HER2‑negative and node‑negative breast cancer". Oncology Reports 42, no. 6 (2019): 2680-2685. https://doi.org/10.3892/or.2019.7358
Copy and paste a formatted citation
x
Spandidos Publications style
Naoi Y, Saito Y, Kishi K, Shimoda M, Kagara N, Miyake T, Tanei T, Shimazu K, Kim SJ, Noguchi S, Noguchi S, et al: Development of recurrence risk score using 95‑gene classifier and its application to formalin‑fixed paraffin‑embedded tissues in ER‑positive, HER2‑negative and node‑negative breast cancer. Oncol Rep 42: 2680-2685, 2019.
APA
Naoi, Y., Saito, Y., Kishi, K., Shimoda, M., Kagara, N., Miyake, T. ... Noguchi, S. (2019). Development of recurrence risk score using 95‑gene classifier and its application to formalin‑fixed paraffin‑embedded tissues in ER‑positive, HER2‑negative and node‑negative breast cancer. Oncology Reports, 42, 2680-2685. https://doi.org/10.3892/or.2019.7358
MLA
Naoi, Y., Saito, Y., Kishi, K., Shimoda, M., Kagara, N., Miyake, T., Tanei, T., Shimazu, K., Kim, S. J., Noguchi, S."Development of recurrence risk score using 95‑gene classifier and its application to formalin‑fixed paraffin‑embedded tissues in ER‑positive, HER2‑negative and node‑negative breast cancer". Oncology Reports 42.6 (2019): 2680-2685.
Chicago
Naoi, Y., Saito, Y., Kishi, K., Shimoda, M., Kagara, N., Miyake, T., Tanei, T., Shimazu, K., Kim, S. J., Noguchi, S."Development of recurrence risk score using 95‑gene classifier and its application to formalin‑fixed paraffin‑embedded tissues in ER‑positive, HER2‑negative and node‑negative breast cancer". Oncology Reports 42, no. 6 (2019): 2680-2685. https://doi.org/10.3892/or.2019.7358
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