Qiao SF, Zhu LW. Laminin-integrin α6 interaction affects phenotypes of hepatocellular carcinoma cells during the process of adherence.
Shijie Huaren Xiaohua Zazhi 2008;
16:2708-2712. [DOI:
10.11569/wcjd.v16.i24.2708]
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Abstract
AIM: To investigate the effect of laminin (LN)-integrin α6 interaction on the phenotype changes after adherent junctions between hepatocellular carcinoma (HCC) cell line BEL-7402 and extracellular matrix.
METHODS: BEL-7402 cells were routinely cultured on LN or bovine serum albumin (BSA) matrix. The effect of anti-integrin α6 monoclonal antibody on cell phenotypes after adherent junctions was examined. The expression of integrin α6 was detected by immunocytochemistry. Acid phosphatase analysis was used to examine the adhesion rate. Cell proliferation was examined by BrdU kit. Galatin zymography was use to measure the matrix metalloproteinases secreted by BEL-7402 cells, and Boyden Chambers to cell invasive ability.
RESULTS: Cultured BEL-7402 cells had positive staining of anti-integrin α6 monoclonal antibody. The adhesion rate of BEL-7402 cells was increased markedly, but was significantly decreased after treatment with anti-integrin α6 antibody (104.4% vs 187.2%, P < 0.05); meanwhile, the invasive ability of BEL-7402 cells was obviously lowered (transmembrane cell number: 88.7 ± 9.9 vs 103.2 ± 16.5, P < 0.01). Galatin zymography found that the types and amount of the secreted matrix metalloproteinases were remarkably increased after adherent junctions, but were notably decreased after anti-integrin α6 antibody was added.
CONCLUSION: Interaction between LN and integrin α6 may regulate human HCC cell phenotypes of proliferation and invasion, which may lower the metastatic potency of tumor cells.
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