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- W2022922468 abstract "Background: Tumor infiltrating lymphocytes (TILs), stem cell phenotype and epithelial-mesenchymal transition (EMT) are known to be associated with response to primary systemic therapy (PST) in breast cancer. However, these markers are strongly correlated with triple negative breast cancer, which shows high pathologic complete response (pCR) to PST. This study was conducted to evaluate clinical implication of these markers as predictive factor for pCR after PST in breast cancer and to find independent predictive factors, irrespective of breast cancer subtype. Methods: The pre-chemotherapeutic biopsy specimens of 153 breast cancer patients who underwent surgical resection after anthracycline-or anthracycline/taxane-based PST were enrolled. TILs (CD4, CD8, and FOXP3), breast cancer stem cell phenotype (CD44+/CD24-, and ALDH1), expression of EMT markers [vimentin, smooth muscle actin (SMA), osteonectin, E-cadherin, and N-cadherin] were evaluated by immunohistochemistry and were correlated with pCR after PST. Results: High infiltration of TILs (CD4+, CD8+, and FOXP3+), expression of stem cell markers (CD44+/CD24-, ALDH1+) and expression of EMT markers (expression of vimentin, SMA and osteonectin; loss of E-cadherin) were significantly associated with high histologic grade and triple negative breast cancer. Of them, high TILs (CD4+, CD8+, and FOXP3+) and expression of ALDH1, vimentin and osteonectin were associated with pCR. In multivariate analysis, CD8+ TILs and a conventional predictive marker, Ki67 were found to be independent predictors for pCR. In subgroup analyses, high CD8+ TILs was remained as a predictive factor for pCR, irrespective of PST regimen and tumor subtype. Conclusion: CD8+ TILs could therefore be used as a reliable predictor of response to PST in breast cancer. Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P1-08-39." @default.
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- W2022922468 date "2013-12-15" @default.
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- W2022922468 title "Abstract P1-08-39: Tumor-infiltrating CD8+ lymphocytes as an independent predictive factor for pathologic complete response to primary systemic therapy in breast cancer" @default.
- W2022922468 doi "https://doi.org/10.1158/0008-5472.sabcs13-p1-08-39" @default.
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