Expression of chemokine CXCL5 and programme death ligand 1 in colorectal cancer tissues are associated with prognosis of patients

Abstract

Objective To analyze the expression of CXCL5 (C-X-C motif ligand 5) and programme death ligand 1 (PD-L1) in colorectal cancer tissues and explore two chemokines associated with clinical characteristics and prognosis. Methods The specimens of tumor tissues and adjacent normal tissues were collected from 78 patients with colorectal cancer who had laparoscopic resection from 2010 to 2011. The clinical data were gotten and follow-up were done for prognosis. Tissue microarrays were made from all specimens and immunohistochemical staining was performed. Expression of CXCL5 and PD-L1 was evaluated using immune risk scoring and analyzed with the association of clinical pathological parameters and prognosis of patients. Results Expression of CXCL5 and PD-L1 was associated with tumor size and TNM stage, and was higher in colorectal cancer tissues than in adjacent normal tissues. Cox univariate regression analysis showed that TNM stage, high expression of both CXCL5 and PD-L1 were the prognostic risk factors for overall survival of colorectal patients. It was shown with multivariate regression analysis that TNM stage and high expression of PD-L1 were the independent prognostic risk factors for overall survival rate. Patients with higher expression of both CXCL5 and PD-L1 had the worst prognosis. Conclusions CXCL5 combined with PD-L1 could stratify the risk of patients with colorectal cancer and predict the prognosis of patients.

Keywords

• |colorectal cancer|cxcl5|programmed death ligand 1