Epigenetic silencing of a long non-coding RNA KIAA0495 in multiple myeloma

Mol Cancer. 2015 Sep 26:14:175. doi: 10.1186/s12943-015-0444-8.

Abstract

In multiple myeloma, a long non-coding RNA, KIAA0495 (alias PDAM/TP73-AS1), had been found progressively downregulated from normal plasma cell to benign monoclonal gammopathy of undetermined significance to symptomatic myeloma. Herein, by methylation-specific PCR, the putative KIAA0495 promoter was found unmethylated in all healthy controls (N = 14) but methylated in 50 % of myeloma cell lines (N = 10). KIAA0495 methylation was shown inversely correlated with KIAA0495 expression. However, KIAA0495 methylation was detected in none of both primary myeloma samples at diagnosis (N = 61) and at relapse/progression (N = 16). Collectively, despite frequently methylated in cell lines, KIAA0495 methylation appeared unimportant in the pathogenesis or progression of myeloma.

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • DNA Methylation / genetics*
  • Disease Progression
  • Epigenesis, Genetic*
  • Female
  • Gene Expression Regulation, Neoplastic
  • Gene Silencing
  • Humans
  • Male
  • Middle Aged
  • Multiple Myeloma / genetics*
  • Multiple Myeloma / pathology
  • RNA, Long Noncoding / antagonists & inhibitors
  • RNA, Long Noncoding / genetics*

Substances

  • RNA, Long Noncoding
  • long non-coding RNA KIAA0495, human