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The tumor promoting agent 12-O-tetradecanoylphorbol-13-acetate (TPA) stimulates cell migration of several tumor cells. Recently, we reported that loss of lysophosphatidic acid (LPA) receptor-3 (LPA(3)) enhanced cell migration of murine lung tumor LL/2 cells. In the present study, we investigated whether LPA(3) is involved in cell migration of mouse lung tumor cells stimulated by TPA. Exogenous LPA(3) gene (Lpar3)-expressing (LL/2-a3) cells and LL/2-AB cells as a vector control generated from LL/2 cells were used. In a cell migration assay, TPA treatment significantly stimulated cell migration of LL/2-AB and LL/2-a3 cells, while the cell migration abilities of LL/2-a3 were markedly lower than those of LL/2-AB cells. Using quantitative real-time reverse transcription (RT)-polymerase chain reaction (PCR) analysis, no effect of TPA treatment on the expression levels of LPA(1), LPA(2) and LPA(3) genes was detected in either type of cells. These results suggest that the LPA(3) may not be involved in the enhanced migration ability by TPA in mouse lung tumor cells.

No Involvement of Lysophosphatidic Acid Receptor-3 in Cell Migration of Mouse Lung Tumor Cells Stimulated by 12-O-Tetradecanoylphorbol-13-acetate