Expression of Noncoding Vault RNA in Human Malignant Cells and Its Importance in Mitoxantrone Resistance

被引:48
作者
Gopinath, Subash C. B. [1 ]
Wadhwa, Renu [1 ]
Kumar, Penmetcha K. R. [1 ]
机构
[1] Natl Inst Adv Ind Sci & Technol, RNA Proc Grp, Biomed Res Inst, Tsukuba, Ibaraki 3058566, Japan
关键词
BREAST-CANCER; UP-REGULATION; PROTEIN; TRANSCRIPTION; ASSOCIATION; SUFFICIENT; ACTIVATION; PARTICLES; TEP1;
D O I
10.1158/1541-7786.MCR-10-0242
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Several noncoding RNAs do vital cellular functions, including gene regulation and cell differentiation. Previously, we reported that vault RNA (vRNA) has the ability to recognize chemotherapeutic compounds, such as mitoxantrone, based on biophysical and biochemical analyses. In the present study, we show that human glioblastoma-, leukemia-, and osteocarcinoma-derived cell lines overexpress vRNA and exhibit higher resistance toward mitoxantrone. Interestingly, when vRNA expression was suppressed by RNA interference in these cells, the resistance progressively decreased. In agreement with these findings, overexpression of vRNA-1 caused resistance to mitoxantrone. These results suggest a role of vRNA in mitoxantrone resistance in malignant cells and justify further studies on the importance and application of noncoding RNAs in cancer chemotherapeutics. Mol Cancer Res; 8(11); 1536-46. (C) 2010 AACR.
引用
收藏
页码:1536 / 1546
页数:11
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