Hypermethylation of CpGs in the promoter of the COL1A1 gene in the aged periodontal ligament

T. Ohi, Y. Uehara, M. Takatsu, M. Watanabe, T. Ono

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


Although the human periodontal ligament shows age-associated histological alterations, the molecular mechanisms are not yet understood. We previously found that COL1A1 gene expression declines with age. In this study, we asked whether DNA methylation in the regulatory region of the gene alters in the aging process, as a possible cause of the decline. The method used was a bisulfite modification of cytosine and nucleotide sequencing of DNA. While the 1st intron region was kept demethylated at young and old ages, the levels of methylation at most CpG sites in the proximal and distal regions of the promoter showed elevation at older ages. Analysis of the data indicates the possible importance of DNA hypermethylation in the promoter region for the age-associated decrease of COL1A1 gene expression.

Original languageEnglish
Pages (from-to)245-250
Number of pages6
JournalJournal of dental research
Issue number3
Publication statusPublished - 2006 Mar


  • Aging
  • COL1A1
  • CpG islands
  • DNA methylation
  • Human
  • Periodontal ligament

ASJC Scopus subject areas

  • Dentistry(all)


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