Expression of Bcl-2, PD-L1 and Its Clinical Significance in Colorectal Cancer

【Abstract】 Objective To study the expression of Bcl-2 and PD-L1 in colon cancer and its relationship with metastasis. Methods Tumor samples were collected from 57 cases of colon cancer, and tumor adjacent normal mucous tissue were obtained as normal control. The expressions of Bcl-2 and PD-L1 were assayed by immunohistochemical staining, and its correlations with patients’ clinical pathological indexes were analyzed. Results The positive rate of Bcl-2 protein was 75.43% and 52.63% in colon cancer tissues and tumor adjacent colon mucous tissue respectively, with statistically significant difference (P<0.05). While the positive rate of PD-L1 was 45.61% and 15.79% in colon cancer tissues and tumor adjacent colon mucous tissue respectively, also with signficant difference (P<0.01). The positive rate of Bcl-2 was correlated with cellular differentiation, and the positive rate of PD-L1 protein was correlated with lymph node metastasis (P<0.05). Conclusion The expression of Bcl-2 may be associated with colon cancer pathologic differentiation, and the expression of PD-L1 may be associated with colon cancer metastasis.