In order to study the role of bone sialoprotein(BSP) in the metastasis of breast cancer cells to bones,a breast cancer cell line stably expressing BSP should be established.

• 为进一步研究骨唾液蛋白(BSP)在乳腺癌细胞骨转移的整个过程中的作用,首先要建立稳定高效表达BSP的乳腺癌细胞系。