ABSTRACT
Abstract Objective: The prognostic importance of Tumor-Infiltrating Lymphocytes (TILs) in the tumor microenvironment of various cancers is increasingly recognized. In the present study, we aimed to investigate the prognostic value of CD3+, CD4+, CD8+, and CD45RO + TILs and their relation to histopathological features in larynx squamous cell carcinoma. Methods: Formalin-Fixed and Paraffin-Embedded (FFPE) samples from 63 primary larynx squamous cell carcinoma patients were immunostained for CD3, CD4, CD8, and CD45RO expression. Positive cells in micrographs from Invasive Margin (IM) and Tumor Center (CT) of tissue specimens counted by ImageJ software and their correlation with disease outcome were analyzed. Results: The expression level of TILs subpopulations was associated with clinicopathological markers as well as Overall Survival (OS) and Disease-Free Survival (DFS). In multivariate analysis, high frequency of CD45RO + cells in IM were confirmed as an independent prognostic marker for DFS (p = 0.007, HR = 4.968) and OS (p = 0.007, HR = 4.957). Similar findings were observed in the multivariate analysis of the combined frequency of CD45RO+cells in IM and CT. Conclusion: TILs are associated with patients clinicopathological features. Also, our findings indicate that CD45RO + TILs are a valuable marker for risk prediction in larynx SCC and could predict patients' outcomes.
ABSTRACT
Introduction: Despite the advances in the understanding and treatment of the Larynx squamous cell carcinoma (LSCC), the survival has not changed in the last 30 years. Objective: In this study, we search for a better understanding of the pattern of genic expression of LSCC. Methods: Thirty-two tumor samples were collected from patients submitted to LSCC resection. The samples were submitted to cDNA microarray analysis to identify LSCC target. Results: The comparison of gene expression between early and advanced stages revealed 30 genes with significant differential expression. RT-qPCR validation experiments confirmed significant expression of only two genes (TMEM56 and SEC14L2) from eight selected. Comparing adjacent normal and tumor tissues, 69 genes showed statistically significant expression (mean ratio of 5.5), and 30 of them were up-regulated in tumor tissues. Gene expression validation by RT-qPCR showed SPRR2G and S100A7A as the most expressed in tumor tissue. Conclusion: The results demonstrate different pattern of expression, specially among tumor and non neoplastic tissue. The limitations to improve survival in larynx cancer justify studies focusing on search for molecular markers of prognosis and possible targeted therapy on LSCC.