Abstract
This study aimed to investigate the expression level and clinical significance of serum NT5E protein (ecto-5'-nucleotidase) in patients with colorectal cancer. The expression level of serum NT5E protein in 232 patients with colorectal cancer and 158 normal controls was detected using enzyme-linked immunosorbent assay. Moreover, the relationship between the expression level of serum NT5E and the clinicopathological features of colorectal cancer was analyzed. The expression level of serum NT5E in patients with colorectal cancer was significantly higher compared with that in normal controls (P< 0.05). The expression level of serum NT5E in patients with colorectal cancer closely correlated with the family history of tumors (P= 0.001), expression level of CA19-9 (P= 0.031), lymph node metastasis (P= 0.001), distant metastasis (P= 0.010), nerve invasion (P= 0.049), degree of differentiation (P= 0.013), and TNM staging (P= 0.001), but not with gender, age, smoking and drinking histories, expression level of carcinoembryonic antigen (CEA), tumor locations, vascular tumor thrombus, cancer nodules, and pathological type (P> 0.05). Moreover, the overall survival rate of patients with colorectal cancer was significantly lower in the NT5E high-expression group, with statistical significance (χ2= 11.184, P= 0.001). The expression level of serum NT5E increased in patients with colorectal cancer, and closely correlated with the malignant evolution and clinical prognosis of colorectal cancer. NT5E might serve as a serological indicator for molecular diagnosis and prognosis of colorectal cancer clinically.
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