Molecular & Cellular Toxicology

, Volume 12, Issue 4, pp 345–357

Identification of aberrant DNA methylation involved in chemoradiation-resistant HCT116 cells via methylation-specific microarray

  • Wei Xiong
  • Yun-Feng Li
  • Shan Liu
  • Ting Chen
  • Hong-Tao Zhang
  • Zhi-Bin Yang
  • Ying-Ying Ding
  • De-Pei Gao
  • Guan-Shun Wang
  • Jian Dong
Original Paper

DOI: 10.1007/s13273-016-0039-5

Cite this article as:
Xiong, W., Li, YF., Liu, S. et al. Mol. Cell. Toxicol. (2016) 12: 345. doi:10.1007/s13273-016-0039-5
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Abstract

Preoperative 5-fluorouracil (5-FU) based chemoradiation is regarded as the standard treatment for locally advanced colorectal cancer (CRC). However, advances in using 5-FU in chemoradiotherapy treatment of CRC are limited by the resistant to the chemoradiotherapy. It has been demonstrated that aberrant methylation contributes to radioresistance in a human colorectal tumor cell line. So we analyzed the differential DNA methylation patterns by methylationspecific microarray in a 5-FU-based concurrent chemoradiotherapy resistance cell model which was established by using human CRC cell line HCT116. As a result, we detected a total of 3719 hypomethylated sites and 27940 hypermethylated sites in CRR cells compared to the control. Furthermore, we analyzed top 10 GO terms involved in significantly differential DNA methylation patterns resulted from the 5-FU-based CRR through GO analyses. To further explore the molecular basis of 5-FU-based CRR in CRC cells, CYP1B1 and CYP2C9 genes expression level were shown down regulated by qRT-PCR. These findings might provide a novel insight for chemoradiation resistance in CRC and provide a potential therapy method in CRC patients.

Keywords

DNA methylation Chemoradiation-resistant Colorectal cancer HCT116 cells 

Supplementary material

13273_2016_39_MOESM1_ESM.pdf (286 kb)
Identification of aberrant DNA methylation involved in chemoradiation-resistant HCT116 cells via methylation-specific microarray

Copyright information

© The Korean Society of Toxicogenomics and Toxicoproteomics and Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  • Wei Xiong
    • 1
  • Yun-Feng Li
    • 2
  • Shan Liu
    • 3
  • Ting Chen
    • 1
  • Hong-Tao Zhang
    • 2
  • Zhi-Bin Yang
    • 2
  • Ying-Ying Ding
    • 4
  • De-Pei Gao
    • 4
  • Guan-Shun Wang
    • 4
  • Jian Dong
    • 5
  1. 1.Department of Radiation Oncology, Yunnan Cancer HospitalThe Third Affiliated Hospital of Kunming Medical UniversityKunmingChina
  2. 2.Department of Colorectal Surgery, Yunnan Cancer HospitalThe Third Affiliated Hospital of Kunming Medical UniversityKunmingChina
  3. 3.Department of Integrated Chinese and Western Medicine, Yunnan Cancer HospitalThe Third Affiliated Hospital of Kunming Medical UniversityKunmingChina
  4. 4.Department of Medical Imaging, Yunnan Cancer HospitalThe Third Affiliated Hospital of Kunming Medical UniversityKunmingChina
  5. 5.Department of Medical Oncology, Yunnan Cancer HospitalThe Third Affiliated Hospital of Kunming Medical UniversityKunmingChina

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