Study on the Relationship between MMP-2, MMP-9 Gene Polymorphisms, and the Risk of Colorectal Cancer

Objective. The aim of the study is to explore the relationship between matrix metalloproteinase 2 (MMP-2) and matrix metalloproteinase 9 (MMP-9) gene polymorphisms and the risk of colorectal cancer. Methods. From January 2019 to December 2021, 308 patients with colorectal cancer in our hospital were selected to be included in the colorectal cancer group and 300 normal healthy people were included in the control group. We perform genotyping, compare the genotype frequencies between the colorectal cancer group and the control group, calculate the relationship between MMP-2 and MMP-9 gene polymorphisms and disease risk, and analyze the genotype distribution characteristics of colorectal cancer patients with different pathological stages and lymph node metastasis status. The expression levels of serum MMP-2 and MMP-9 in patients with different genotypes were compared. Results. The frequency of CC genotype and C gene at the MMP-2 gene−735 (C/T) locus in the colorectal cancer group was higher than that of the control group, and the frequency of TT genotype and T gene at MMP-9 gene−1562 (C/T) locus was a higher control group (P0.05); MMP-2 gene−735 (C/T) locus CC genotype and MMP-9 gene−1562 (C/T) locus TT genotype are dangerous genotypes for colorectal cancer. OR values were 1.490 (95% CI: 1.085–2.047), 1.519 (95% CI: 1.061–2.174); TNM stage III-IV, the proportion of CC genotype and TT genotype at MMP-9 gene−1562 (C/T) locus in patients with lymph node metastasis is higher than that without lymph node metastasis of TNM stage I-II patients (P