Diagenode

Extensive promoter hypermethylation and hypomethylation is associated with aberrant microRNA expression in chronic lymphocytic leukemia.


Baer C, Claus R, Frenzel LP, Zucknick M, Park YJ, Gu L, Weichenhan D, Fischer M, Pallasch CP, Herpel E, Rehli M, Byrd JC, Wendtner CM, Plass C

Dysregulated microRNA (miRNA) expression contributes to the pathogenesis of hematopoietic malignancies, including chronic lymphocytic leukemia (CLL). However, an understanding of the mechanisms that cause aberrant miRNA transcriptional control is lacking. In this study, we comprehensively investigated the role and extent of miRNA epigenetic regulation in CLL. Genome-wide profiling performed on 24 CLL and 10 healthy B cell samples revealed global DNA methylation patterns upstream of miRNA sequences that distinguished malignant from healthy cells and identified putative miRNA promoters. Integration of DNA methylation and miRNA promoter data led to the identification of 128 recurrent miRNA targets for aberrant promoter DNA methylation. DNA hypomethylation accounted for over 60% of all aberrant promoter-associated DNA methylation in CLL, and promoter DNA hypomethylation was restricted to well-defined regions. Individual hyper- and hypomethylated promoters allowed discrimination of CLL samples from healthy controls. Promoter DNA methylation patterns were confirmed in an independent patient cohort, with eleven miRNAs consistently demonstrating an inverse correlation between DNA methylation status and expression level. Together, our findings characterize the role of epigenetic changes in the regulation of miRNA transcription and create a repository of disease-specific promoter regions that may provide additional insights into the pathogenesis of CLL.

Tags
Bioruptor
Chromatin Shearing
ChIP-qPCR
IP-Star
Antibody
H3K4me3 (C15410003)
Bioruptor Plus

Share this article

Published
June, 2012

Source

Products used in this publication

  • cut and tag antibody icon
    C15410003-50
    H3K4me3 Antibody - ChIP-seq Grade

活动

  • IHEC Annual meeting 2022
    Quebec, Canada
    Oct 4-Oct 7, 2022
  • Danish RNA Society's 7th Annual Meeting on RNA
    Aarhus, Denmark
    Oct 11, 2022
  • ASHG 2022
    Los Angeles, California, USA
    Oct 25-Oct 29, 2022
  • International Conference on Epigenetics and Bioengineering 2022
    Houston, Texas, USA
    Oct 27-Oct 29, 2022
  • Long-Read Sequencing Meeting Uppsala LRUA22 Meeting
    Uppsala, Sweden
    Oct 31-Nov 2, 2022
  • Association for Molecular Pathology 2022
    Phoenix, Arizona, USA
    Nov 1-Nov 5, 2022
 查看所有活动

新闻

 查看所有新闻


The European Regional Development Fund and Wallonia are investing in your future.

Extension of industrial buildings and new laboratories.


       Site map   |   Contact us   |   Conditions of sales   |   Conditions of purchase   |   Privacy policy   |   Diagenode Diagnostics