(Methods )mRNA interfering double-stranded DNA vector pRNAH- VEGF and control vector pRNA- Ctr were constructed respectively,and then were transfected into MCF-7 cells.

• 方法构建针对人VEGF mRNA干扰质粒载体pRNAH-VEGF和对照载体pRNA-Ctr并转染人乳腺癌的MCF-7细胞株。