Cell Counts, rather than Proportion, of CD8/PD-1 Tumor-Infiltrating Lymphocytes in a Tumor Microenvironment Associated with Pathological Characteristics of Chinese Invasive Ductal Breast Cancer. (31st March 2019)

• Record Type: Journal Article
• Authors: Song, Qingkun; Shi, Feng; Adair, Maya; Chang, Hong; Guan, Xiudong; Zhao, Yanjie; Li, Yuchen; Wu, Guangjiang; Wu, Jiangping
• Other Names: Wu Ning Guest Editor.
• Is Part Of: Journal of immunology research. Volume 2019(2019)
• Publication Date: 2019-03-31
• Subjects: Immunology -- Periodicals; Immunology -- Research -- Periodicals; 616.07905
• DOI: 10.1155/2019/8505021
• Languages: English
• ISSNs: 2314-8861

Abstract

Abstract : Objective . This study is aimed at investigating the association of exhausted CD8 + tumor-infiltrating lymphocytes with clinic-pathological factors. Methods . 133 patients diagnosed with primary invasive ductal breast cancer were recruited into the cross-sectional study consecutively. Immunohistochemistry was used to detect biomarker expression on formalin-fixed and paraffin-embedded sections. Double staining of CD8 and PD-1 was conducted on lymphocytes. Results . The proportion of CD8 + /PD-1 - TILs was 16% among patients with axillary lymph node metastasis, significantly lower than those without metastasis (24%). The expression of CK7, CK20, or Ki-67 was not related with the proportion of phenotypes of CD8/PD-1 TILs. Younger patients had more cell counts of CD8 + /PD-1 - TILs than elderly patients (18/HPF vs. 9/HPF, p < 0.05 ). Patients with axillary lymph node metastasis had less CD8 + /PD-1 - TILs than those without metastasis (11/HPF vs. 27/HPF, p < 0.05 ). Median counts of CD8 + /PD-1 - TILs among patients with CK20 and E-Cad expression were 33/HPF and 14/HPF, significantly higher than those among patients with negative CK20 (16/HPF) and E-Cad expression (6/HPF). Ki-67 index had a significant correlation with cell counts of CD8 + /PD-1 + TILs and CD8 + /PD-1 - TILs, and the correlation coefficients were 0.19 and 0.21 (p < 0.05 ), respectively. Conclusion . The proportion of CD8 + /PD-1 - TILs was related with metastatic status of the axillary lymph node but cell counts of CD8 + /PD-1 - TILs were related with metastatic status of the axillary lymph node and expression of CK7, CK20, E-Cad, and Ki-67. Absolute cell counts, not proportion of CD8/PD-1 TILs, were more likely to distinguish clinic and pathologic characteristics of breast cancer.