Subtelomeric DNA methylation and telomere length in human cancer cells

Myung Eun Lee, Sun Young Rha, Hei Cheul Jeung, Hyun Cheol Chung, Bong Kyeong Oh

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Subtelomeric epigenetic modifications are known to be associated with telomere length. We examined subtelomeric DNA methylation at seven sites for five chromosomes by methylation-specific PCR (MSP) and two sites for two chromosomes by bisulfite genomic sequencing (BGS) in 20 human cancer cell lines and subsequently analyzed their association with telomere length. Full-methylation (55/140) was more frequently found compared to un-methylation (35/140) (p = 0.01). Subtelomeric-methylation patterns varied from region to region; full-methylation and un-methylation were dominant at one of 9q sites (20/20) and 9p (18/20), respectively. MSP and BGS data exhibited no apparent correlation between methylation status and telomere length. In addition, Hep3B subclones that possessed different telomere lengths exhibited no changes in methylation status according to telomeres. In summary, subtelomeres might form distinct chromatin structures from region to region and effect of subtelomeric DNA methylation on telomere regulation might be little.

Original languageEnglish
Pages (from-to)82-91
Number of pages10
JournalCancer Letters
Volume281
Issue number1
DOIs
Publication statusPublished - 2009 Aug 18

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Oncology
  • Cancer Research

Cite this