反义c—myc,增殖细胞核抗原基因片断抑制血管平滑细胞相关基因表达

目的 研究有效的防治血管术后狭窄的方法,以及应用反义ｃ－ｍｙｃ,增殖细胞核抗原（ＰＣＮＡ）基因片断来封闭其相应基因表达的可行性。方法 设计并合成ｃ－ｍｙｃ,ＰＣＮＡ正义,反义及四个碱基错配的反义寡核苷酸,经体外稳定性检测和细胞转染实验证实其有效性后,分别作用于体外培养的血管平滑肌细胞（ＶＳＭＣｓ）,应用逆转录ＰＣＲ半定量测定及计算机图像分析的方法,春对ｃ－ｍｙｃ、ＰＣＮＡ基因表达的影响。结果 设计

Antisense oligonucleotides inhibit c-myc and PCNA expression in the vascular smooth muscle cells

OBJECTIVE: To study the methods for prevention and treatment of vascular restenosis. METHODS: We used two factors which result in hyperplasia of vascular smooth muscle cells (VSMCs) and applied antisense c-myc, PCNA oligonucleotides to attenuate the expression of their related gene. The sense, antisense, and mismatched oligomers for c-myc or PCNA were designed and synthesized. They were individually delivered to the cultured VSMCs after the oligomers were stable in culture medium for 5 days and could cross the plasma membranes into the cells. Using RT-PCR and the image analysis system, we observed the changes of both c-myc and PCNA gene expression in the VSMCs. RESULTS: Antisense c-myc and PCNA at a concentration of 10 mumol/L were able to inhibit the expression of c-myc and PCNA gene in VSMCs (P < 0.05), whereas the sense and the mismatched ones couldn't inhibit the expression (P > 0.05). CONCLUSION: The antisense technique is an effective method for the inhibition of VSMCs proliferation.