Objective:To investigate the expressions of matrix metalloproteinase 9 (MMP-9), matrix metalloproteinase 2 (MMP-2), migration-inducing protein 7 (MIG-7) and filamin A (FLNa) in colon cancer tissues and their effects on prognosis.Methods:The tumor specimens and corresponding adjacent normal tissues of 899 colon cancer patients undergoing surgical resection in the Affiliated Huai'an No. 1 People's Hospital of Nanjing Medical University from January 2013 to December 2015 were collected. The expression levels of MMP-9, MMP-2, MIG-7 and FLNa in colon cancer tissues and adjacent normal tissues were measured by using enzyme-linked immunosorbent assay (ELISA), and the relationship between their expression levels and clinicopathological characteristics as well as prognosis of colon cancer was analyzed.Results:The expression levels of MMP-2, MMP-9 and MIG-7 in colon cancer tissues were (481±69) ng/ml, (262±85) ng/ml,(156±23) ng/ml, respectively, which were higher than those in adjacent normal tissues [(136±33) ng/ml, (191±21) ng/ml, (98±18) ng/ml], and the differences were statistically significant ( t was 41.591, 120.224, 59.896, all P < 0.01); the expression level of FLNa in colon cancer tissues was (19.5±3.2) ng/ml, which was lower than that in adjacent normal tissues [(65.4±8.3) ng/ml], and the difference was statistically significant ( t = 154.902, P < 0.05). The expression levels of MMP-9, MMP-2, MIG-7 and FLNa in colon cancer tissues were correlated with tumor diameter, Dukes stage, lymph node metastasis and degree of differentiation (all P < 0.05). Cox multivariate analysis showed that the high expressions of MMP-9, MMP-2, and MIG-7 and the low expression of FLNa were independent factors affecting the prognosis of patients (all P < 0.05). Kaplan-Meier analysis showed that the median overall survival time of patients with low expression of MMP-9, MMP-2 and MIG-7 was 55 months (95% CI 25-78 months), 56 months (95% CI 26-79 months) and 54 months (95% CI 25-78 months), respectively, which were longer than those with high expression, while the median overall survival time of patients with high expression of FLNa was 58 months (95% CI 27-80 months), which was longer than those with low expression, and the difference was statistically significant ( P < 0.05). Conclusions:MMP-9, MMP-2, MIG-7 and FLNa are closely related to the occurrence and progression of colon cancer. The high expression levels of MMP-9, MMP-2 and MIG-7 and the low expression level of FLNa have influences on the prognosis of colon cancer patients, and it can be used as important indicators for clinical prognosis judgement.