S3核糖体蛋白基因的过表达与K562/DOX细胞耐药性的关系  

Overexpression of S3 ribosomal protein gene is involved in drug resistance in K562/DOX cells

作　　者：朱宁希[1] 郑树[2] 徐荣臻[2] 虞荣喜[1] 

机构地区：[1]浙江省中医院血液科,杭州310006 [2]浙江大学肿瘤研究所

出　　处：《中华血液学杂志》2003年第3期141-143,共3页Chinese Journal of Hematology

基　　金：浙江省卫生厅科研基金资助项目 (2 0 0 0 0 3 )

摘　　要：目的　观察S3核糖体蛋白 (S3rp)基因表达的改变对白血病耐药性的影响。方法　通过RT PCR方法获得含S3rp基因完整开放阅读框架 (ORF)的cDNA ,并将其克隆到pGEM TEasy载体里 ,然后通过亚克隆方法将pGEM TEasy重组质粒里的S3rpcDNA片段克隆到真核表达载体pcDNA3.1(+)中 ,分别构建正向插入和反向插入的S3rpcDNA重组质粒 ,进行基因转染。将正义S3rpcDNA真核表达质粒转染K5 6 2细胞 ,使其S3rp基因表达增加 ,观察其对化疗药物敏感性的改变 ;将反义S3rpcDNA真核表达质粒转染具有多药耐药 (MDR)表型的K5 6 2 DOX细胞 ,阻碍其S3rp基因的表达 ,观察其对化疗药物耐药性的改变。结果　转染正义S3rpcDNA真核表达质粒后 ,K5 6 2细胞对阿霉素的耐药性比未转染的K5 6 2细胞增强 5 .8倍 ;转染反义S3rpcDNA真核表达质粒后 ,K5 6 2 DOX细胞对阿霉素的耐药性比未转染的K5 6 2 DOX细胞降低 6 9%。结论　S3rp基因过表达在K5 6 2 DOX细胞耐药性的形成中起重要作用。Objective To investigate the effect of overexpression of S3 ribosomal protein (S3rp) gene on the resistance of leukemia cell to antitumor drugs. Methods Both sense and antisense cDNA recombinants of S3rp gene were constructed with pcDNA3.1 expression vector. Subsequently, the sense S3rp cDNA recombinant was transfected into K562 cells while the antisense one into K562/DOX cells (a multidrug resistant cell line). In addi tion, empty pcDNA3.1 vector was transfected into the corresponding cells as negative controls. The chemosensitivity of cells was evaluated by MTT assay. Results Sense S3rp cDNA transfected K562 cells were 5.8 times more resistant to doxorubicin than control cells did, whereas antisense S3rp cDNA transfected K562/DOX cells were 3.2 times less resistant to doxorubicin than control cells did. Conclusion Overexpression of S3rp gene plays an important role in the development of drug resistance in K562/DOX cells.

关 键 词：S3核糖体蛋白基因 K562/DOX细胞 耐药性 基因过表达 白血病 

分 类 号：R733.7[医药卫生—肿瘤]