Expression and clinical significance of MMP-9 and P53 in lung cancer

This study aimed to investigate the expression of MMP-9 (matrix metalloproteinases 9) and P53 (tumor suppressor proteins, tumor protein P53) in serum of patients with lung cancer. The relation between the two factors and their clinical pathological features were also explored.

150 patients were selected as the experimental group. They were diagnosed with lung cancer in Shandong Province Chest Hospital from January 2014 to January 2017. Meanwhile, 90 healthy subjects were selected as the control group. The expression levels of MMP-9 and P53 in serum were detected by fluorescence quantitative Real-Time Polymerase Chain Reaction (RT-PCR). The diagnostic value of MMP-9 and P53 in patients with lung cancer was analyzed by receiver operating characteristic curve (ROC). Pearson test was used to analyze the correlation between MMP-9 and P53 in the experimental group. The patients were divided into high expression and low expression groups according to the median of MMP-9 and P53 expressions.

The expressions of MMP-9 and P53 in patients with lung cancer were higher than the normal level (p<0.05). MMP-9 and P53 in serum of the experimental group were closely related to patients' TNM-stage, degree of differentiation, lymph node metastases, smoking history and pattern of organization (p<0.05). The expressions of MMP-9 and P53 were positively correlated (p<0.001).

The expressions of MMP-9 and P53 played important roles in lung cancer and were closely related to clinicopathology and three-year survival rate. They could provide help for the diagnosis and treatment of clinical lung cancer.