ABSTRACT
Objective To investigate the expressions of matrix metallopro-teinase-7 (MMP-7),basic fibroblast growth factor (bFGF)in NSCLC,and to elucidate the correlations among MMP-7,bFGF and MVD, as well as their relationships with cancer metastasis in NSCLC.Methods The expressions of MMP-7,bFGF and MVD were detected by immunohistochemical SP method in 80 cases of NSCLC and 40 cases of normal lung tissue,compare the expression of MMP-7 and bFGF in NSCLC and normal lung tissue,and then invest the rela-tionship between their expression and lymph node metastasis in NSCLC.The MVD was investigated within the CD34 positive slides,check the relationship between MVD and the expression of MMP-7 ,bFGF in NSCLC, and also its relationship with histology type,differentiation degree,lymph node metastasis and TNM stage. Results The positive ratesof MMP-7 and bFGF were significantly higher in NSCLC than those in normal lung tissue (70.0% vs 1 2.5%,χ2 =35.276,P =0.000;65.0% vs 1 0.0%,χ2 =32.41 1 ,P =0.000).The posi-tive rates of MMP-7 and bFGF were also significantly higher in group with lymph node metastasis compared to those group without lymph node metastasis (83.0% vs 51 .5%,χ2 =9.1 39,P =0.003;80.9% vs 42.4%,χ2 =1 2.584,P =0.000).The numbers of MVD were significantly higher in cases with MMP-7 and bFGF posi-tive expressions than those in cases with MMP-7 and bFGF negative expressions (46.78 ±1 1 .1 1 vs 31 .1 2 ± 7.62,t =5.831 ,P =0.000;45.05 ±1 0.97 vs 34.77 ±8.56,t =5.364,P =0.000).The number of MVD in group with lymph node metastasis was also significantly higher than that in group without lymph node metasta-sis (61 .32 ±21 .61 vs 40.52 ±1 8.31 ,t =3.865,P =0.008).The number of MVD in staging Ⅲ-Ⅳ group was significantly higher than that in stagingⅠ-Ⅱgroup (55.28 ±1 5.64 vs 41 .73 ±1 6.48,t =2.531 ,P =0.01 3).Conclusion The expression levels of MMP-7 and bFGF in NSCLC are high,and the positive rates of MMP-7 and bFGF are correlated with the lymphnode metastasis.The numbers of MVD are significantly higher in cases with MMP-7 and bFGF positive expressions than those in cases with MMP-7 and bFGF negative expre-ssions.MVD is correlated with lymph node metastasis and the TNM stage.It suggests that the expressions of MMP-7,bFGF and MVD may involve in the invasion and metastasis of NSCLC.