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DNA hypomethylation of interleukin 8 in clear cell renal cell carcinoma

Koo Han Yoo1, Yong-Koo Park, Sung-Goo Chang

  • 1Departments of Urology and.

Oncology Letters
|December 21, 2012
PubMed

Insights

DNA hypomethylation is linked to cancer. This study found the interleukin 8 (IL8) gene is significantly hypomethylated in clear cell renal cell carcinoma (CCRCC) tissues compared to normal tissues.

Area of Science:

  • Oncology
  • Epigenetics
  • Molecular Biology

Background:

  • DNA hypomethylation is a known hallmark of cancer, contributing to carcinogenesis.
  • Understanding specific gene methylation changes is crucial for cancer research.

Purpose of the Study:

  • To investigate the hypomethylation status of candidate genes in clear cell renal cell carcinoma (CCRCC).
  • To identify specific genes exhibiting significant hypomethylation in CCRCC tissues.

Main Methods:

  • Utilized large-scale, high-throughput DNA methylation profiling.
  • Analyzed candidate genes for hypomethylation in CCRCC and normal tissues.
  • Validated findings using sequencing analysis.

Main Results:

  • The interleukin 8 (IL8) gene showed the most prominent hypomethylation in CCRCC tissues (beta value difference of 0.406).
  • IL8 methylation rate was 2.4% in cancer vs. 14.7% in normal tissue; non-methylation rate was 82.9% in cancer vs. 52.9% in normal tissue.
  • IL8 hypomethylation did not correlate with Fuhrman's nuclear grade, TNM stage, or patient survival.

Conclusions:

  • The IL8 gene is significantly hypomethylated in clear cell renal cell carcinoma (CCRCC) tissue compared to normal tissue.
  • Despite significant hypomethylation, IL8 status does not appear to be a prognostic biomarker for CCRCC.

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