Abstract：【Objective】To study the expression of chemokine CCL5 and MMP-9 in serum of human non-small cell lung cancer and their relationship with the postoperative recurrence. 【Methods】A prospective cohort study was conducted to investigate the serum levels of CCL5 and MMP-9 in 103 patients with NSCLC. Serum samples of all patients were collected at 3 months after operation. Serum samples of 20 healthy subjects were collected to detect the levels of CCL5 and MMP-9 as well. The patients were divided into the high level group and low level group of CCL5 and MMP-9 based on the median level of serum CCL5 and MMP-9 at 3 months postoperation. After two years of follow-up, the difference in recurrence rates between high-level group and low-level group was observed, and the correlation between level of CCL5 and MMP-9 and postoperative recurrence rate was analyzed. 【Results】The recurrence rate of CCL5 high-level group was 53.12% (17/32), which was significantly higher than that of CCL5 low-level group (29.58%, 21/71). The difference was statistically significant (P<0.05). The recurrence rate of MMP-9 high-level group was 46.67% (14/30), which was higher than that of MMP-9 low level group (32.88%, 24/73). The difference was statistically significant (P<0.05).The Cox regression analysis showed that the high levels of serum CCL5 and MMP-9 after three months of operation were correlated to the recurrence of NSCLC (P<0.05). No other indexes were not associated with postoperative recurrence (P>0.05). 【Conclusion】The abnormal elevated levels of serum chemokine CCL5 and MMP-9 may play an important role in the occurrence and development of NSCLC. Detecting the changes of serum CCL5 and MMP-9 levels after operation may be helpful for early warning of tumor recurrence.
2019, Vol. 36 
