Aging-related alterations of subtelomeric methylation in sarcoidosis patients

Toyoki Maeda, Zhi Guan Jing, Yoshihiro Higuchi, Jun Ichi Oyama, Naoki Makino

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


Telomeres in somatic cells become shorter with aging, and the shortening is accelerated by pathophysiological conditions. Telomere shortening can be influenced by subtelomeric DNA methylation. The telomere length and subtelomeric methylation status in peripheral leukocytes were compared in healthy controls and sarcoidosis patients. The sarcoidosis patients revealed shorter telomeres and a faster attrition of telomere shortening in comparison with healthy controls. Both healthy controls and sarcoidosis patients showed that long telomeres (>9.4 kb) decrease and short telomeres (<4.4 kb) increase with aging, accompanying relative increases of long telomeres with subtelomeric hypermethylation and short telomeres with subtelomeric hypomethylation. This suggested that the aging-related telomere shortening is associated with the surrounding subtelomeric hypomethylation. Furthermore, sarcoidosis patients showed this alteration of the subtelomeric methylation earlier than controls (in their 60s or later). This altered subtelomeric hypomethylation may correspond to the accelerated telomere shortening in sarcoidosis. This also means that the subtelomeric hypomethylation can be also influenced by certain disease conditions.

Original languageEnglish
Pages (from-to)752-760
Number of pages9
JournalJournals of Gerontology - Series A Biological Sciences and Medical Sciences
Issue number7
Publication statusPublished - Jul 2009

All Science Journal Classification (ASJC) codes

  • Ageing
  • Geriatrics and Gerontology


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