• 1.Fuzong Medical College of Fujian Medical University, Fuzhou 350025, China;;
  • 2.Research Institute of General Surgery, Fuzhou General Hospital of Nanjing Military Region, Fuzhou 350025, China;
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Objective  According to heparanase’s gene sequence of GenBank, to construct heparanase gene-targeted small interfering RNA (siRNA) and its expression vector and to observe its interference effect on the expression of heparanase gene in human malignant breast cancer MDA-MB-231 cell.
Methods  Heparanase gene-targeted hairpin siRNA was designed, two complementary oligonucleotide strands were synthesized and inserted into pGPU6/GFP/Neo vector, which was identified by sequence identify. Human malignant breast cancer MDA-MB-231 cell was transfected with the constructed vector with lipofectamine method. Fluorescence photograph was taken. Real-time PCR (RT-PCR) was performed to evaluate the level of heparanase mRNA expression.
Results  Four kinds of heparanase gene-targeted hairpin siRNA were designed, then were inserted into pGPU6/GFP/Neo vector after annealing. Sequencing indicated the construction was successful. Fluorescence photographs showed MDA-MB-231 cells were transfected successfully. RT-PCR showed that heparanase mRNA expression levels were inhibited significantly (P lt;0.05).
Conclusion  The heparanase gene-targeted siRNA and its vector are successfully constructed and MDA-MB-231 cells are transfected successfully. Heparanase mRNA expression levels are significantly inhibited by siRNA vector, which provide a new method for the treatment of cancer.

Citation: LIU Qizhi ,WANG Lie. Silencing of Heparanase Gene-Targeted by Small Interfering RNA. CHINESE JOURNAL OF BASES AND CLINICS IN GENERAL SURGERY, 2010, 17(2): 142-146. doi: Copy