Abstract
Objective: To select a target molecule associated with invasive potential in PC-3M cell. Methods: Cell subclones were isolated from PC-3M cell line with the method of limited dilution and their invasive ability characterized by monolayer invasion assay. The expression of u-PAR in the cell subclones at mRNA and protein levels was assayed respectively by non-competitive quantitative RT-PCR and immunohistochemical assay. Results: The expression level of u-PAR in highly invasive cell subclones was higher than that of lower invasive subclones. Conclusion: The higher expression level of u-PAR is associated with the relative strong invasive ability of PC-3M subclones. It is indicated that the u-PAR might be a promising target molecule for inhibiting invasion of highly invasive PC-3M cell subclones.
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