Abstract
CX3CL1 exhibits chemoattraction for T-cells, monocytes, and CD57+ natural killer cells mediating antitumor immunity. The role of CX3CL1 has been studied in tumors of the breast, lung, colon, pancreas, prostate, etc. The current study was undertaken to understand the importance of CX3CL1 and its correlation with CD57+ cells in oral squamous cell carcinoma (OSCC). Seventy-five primary OSCC were staged and histopathologically graded, followed by immunohistochemistry for CX3CL1 and CD57. Mann-Whitney U-test, Kruskal-Wallis test, Post hoc Bonferroni test, and Pearson's correlation coefficient were applied. CX3CL1 assessment within the tumor cells was high in 62.66% of cases, and the CD57 Labeling Index (LI) varied over a wide range of 8.2-111.6. A statistically significant reduction in expression of both CX3CL1 and CD57 was observed with an increase in histologic grade (p = 0.021 and 0.038, respectively). It is concluded that CX3CL1 and CD57 may be important players in the immune surveillance of OSCC. Further studies with detailed follow-up for the overall survival of patients will help in studying the diagnostic, prognostic, and therapeutic roles of CX3CL1 in OSCC.
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