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Expression of matrix metalloproteinase-9 (MMP-9) in different degrees of chronic hepatitis B (CHB) and the correlation of MMP-9 with inflammation was investigated. A total of 96 CHB patients (observation group) admitted and treated in Dongying People's Hospital from December 2016 to November 2017 were selected, and they were compared with 60 healthy individuals (control group) selected in the physical examination center during the same time period. Enzyme-linked immunosorbent assay (ELISA) was used to detect the expression of MMP-9, tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6), MMP-9 expression in different inflammation grades and fibrosis stages, and the relationship between MMP-9 and inflammation was analyzed. The levels of MMP-9, TNF-α and IL-6 in serum in the observation group were obviously higher than those in the control group (P&lt;0.05). The rank sum test indicated that there were statistically significant differences in the expression levels of MMP-9 among the inflammation grades G0, G1, G2, G3 and G4 (P&lt;0.05). The expression levels of MMP-9 in fibrosis stages S0, S1, S2, S3 and S4 were detected via the rank sum test, and it suggested that the differences among the 5 stages were statistically significant (P&lt;0.05). Pearsons correlation analysis showed that the MMP-9 expression level was positively correlated with TNF-α and IL-6 (P&lt;0.05). In conclusion, the MMP-9 level is elevated remarkably in patients with varying degrees of CHB, it may play an important role in the pathological progress of liver, and it has a close correlation with inflammation, which can provide a theoretical basis for clinical treatment.

Expression of MMP-9 in different degrees of chronic hepatitis B and its correlation with inflammation