Changes in DNA methylation are associated with the development of drug resistance in cervical cancer cells

被引:39
作者
Chen, Chih-Cheng [1 ,2 ]
Lee, Kuan-Der [1 ,2 ]
Pai, Mei-Yu [3 ,4 ]
Chu, Pei-Yi [5 ]
Hsu, Chia-Chen [3 ,4 ]
Chiu, Chia-Chen [1 ,2 ,3 ,4 ]
Chen, Li-Tzong [6 ]
Chang, Jang-Yang [7 ]
Hsiao, Shu-Huei [3 ,4 ]
Leu, Yu-Wei [3 ,4 ]
机构
[1] Chang Gung Univ, Coll Med, Dept Hematol & Oncol, Chang Gung Mem Hosp, Taoyuan, Taiwan
[2] Chang Gung Inst Technol, Taoyuan, Taiwan
[3] Natl Chung Cheng Univ, Dept Life Sci, Human Epigen Ctr, Chiayi 621, Taiwan
[4] Natl Chung Cheng Univ, Inst Biomed Sci, Chiayi 621, Taiwan
[5] Show Chwan Mem Hosp, Dept Pathol, Changhua, Taiwan
[6] Natl Inst Canc Res, Natl Hlth Res Inst, Zhunan 350, Miaoli County, Taiwan
[7] Natl Cheng Kung Univ, Natl Cheng Kung Univ Hosp, Div Hematol Oncol, Dept Internal Med,Coll Med, Tainan 704, Taiwan
关键词
DNA methylation; DRUG; Cancer; EPIGENETIC GENE-REGULATION; MESENCHYMAL STEM-CELLS; BREAST-CANCER; PROMOTER METHYLATION; TARGETED METHYLATION; COLORECTAL-CANCER; GASTRIC-CANCER; TUMOR-GROWTH; KINASE GENE; IN-VIVO;
D O I
10.1186/s12935-015-0248-3
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Background and propose: Changes in DNA methylation are associated with changes in somatic cell fate without the alteration of coding sequences. In addition to its use as a traceable biomarker, reversible DNA methylation could also serve as a therapeutic target. In particular, if the development of drug resistance is associated with changes in DNA methylation, then demethylation might reverse the resistance phenotype. The reversion of the drug-resistance might then be feasible if the association between abnormal DNA methylation and the development of drug-resistance could be identified. Methods: Methylation differences between the drug-resistance cervical cancer cell, SiHa, and its derived oxaliplatin-resistant S3 cells were detected by methylation specific microarray. The drug-resistance cells were treated with demethylation agent to see if the resistance phenotype were reversed. Targeted methylation of one of the identified locus in normal cell is expected to recapitulate the development of resistance and a two-component reporter system is adopted to monitor the increase of DNA methylation in live cells. Results: In this report, we identified methylation changes, both genome-wide and within individual loci, in the oxaliplatin-resistant cervical cancer cell S3 compared with its parental cell line SiHa. Treatment of S3 with a demethylation agent reversed increases in methylation and allowed the expression of methylation-silenced genes. Treatment with the demethylation agent also restored the sensitivity of S3 to cisplatin, taxol, and oxaliplatin to the same level as that of SiHa. Finally, we found that methylation of the target gene Casp8AP2 is sufficient to increase drug resistance in different cells. Conclusions: These results suggest that global methylation is associated with the development of drug resistance and could serve as a biomarker and therapeutic target for drug resistance in cervical cancer.
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页数:9
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