Objective: To investigate the mRNA and protein expression of axin inhibitor (AXIN), β-chain protein (β-catenin), matrix metalloproteinase-7 (MMP-7) and matrix metalloproteinase-9 (MMP-9), and their relationship in lymphoma cells.
Methods: The expressions of MMP-7, MMP-9, β-catenin and AXIN in lymphoma cell lines were detected by Western blot and RT-PCR. Moreover, the lymphoma cells with relatively low expression of AXIN were grouped and were transiently transfected by using pcDNA5-His-β-catenin and pCMV5-HA-AXIN; the protein and mRNA expression of MMP-7, MMP-9 and β-catenin in lymphoma cells was detected by Western blot and RT-PCR, respectively; the cell infiltration and migration ability in group with stable ligh expression of AXIN, group of interfering stable high expression of AXIN and blank control group were analyzed by transwell experiment.
Results: The AXIN negatively correlated with MMP-7, MMP-9 and β-catenin expression in lymphoma cell lines. After the up-regulation of AXIN, the mRNA expression of MMP7, MMP-9 and β-catenin in Raji cells all not significantly changed, while the pratein expression of MMP-7, MMP-9 and β-catenin all significantly decreased (P<0.05); after the up-regulation of β-catenin, the mRNA and protein expression of MMP-7, MMP-9 was also up-regulated significantly (P<0.05). After interfering the AXIN, the mRNA expression of MMP-7, MMP-9 and β-catenin in group with stable high expression of AXIN all not changed significantly, while protein expression of MMP-7, MMP-9 and β-catenin was down-regulated significantly (P<0.05); after interfering the β-catenin, the protein and mRNA expression of MMP-7 and MMP-9 in group with stable high expression of AXIN all were down-regulated significantly(P<0.05).
Conclusion: The up-regulation of AXIN expression in lymphoma cells can lead to decrease of β-catenin expression and the resuts in significant decrease of MMP-7 and MMP-9 expression, there by plays a role to block the infiltration and migration of lymphoma cells.
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