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OBJECTIVE To investigate the significance and relationship between matrix metaloproteinase 9(MMP-9)and infiltration of macrophages in the process of invasion and metastasis in oral squamous cel carcinoma(OSCC). METHODS The immunohistochemical SABC method was used to detect the expression of MMP-9 and CD68(for labeling macrophages)in 42 cases of OSCC and in 10 normal tissues. RESULTS The expression of MMP-9 and macrophage counts in the OSCC cases were significantly higher compared to normal tissues(P<0.05). The expression of MMP-9 and macrophage counts were related to lymphnode metastasis and the TNM stage(P<0.05),showing that there was a positive correlation among these parameters(γ=0.443,P<0.01). CONCLUSION Both MMP-9 and macrophages may play an important role in the process of invasion and metastasis in OSCC,and this cel ular activity may relate to the macrophages which affect the tumor cells and upregulate the expression of MMP-9.
OBJECTIVE To investigate the significance and relationship between matrix metaloproteinase 9 (MMP-9) and infiltration of macrophages in the process of invasion and metastasis in oral squamous cel carcinoma (OSCC). METHODS The immunohistochemical SABC method was used to detect the expression of MMP- RESULTS The MMP-9 and macrophage counts in the OSCC cases were significantly higher than normal tissues (P <0.05). The expression of MMPs and macrophages in 42 cases of OSCC and in 10 normal tissues. -9 and macrophage counts were related to lymphnode metastasis and the TNM stage (P <0.05), showing that there was a positive correlation among these parameters (γ = 0.443, P <0.01). CONCLUSION Both MMP-9 and macrophages may play an important role in the process of invasion and metastasis in OSCC, and this cel ular activity may relate to the macrophages which affect the tumor cells and upregulate the expression of MMP-9.