Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
6724840
Reference Type
Journal Article
Title
DNA methylation inhibition increases T cell KIR expression through effects on both promoter methylation and transcription factors
Author(s)
Liu, Y; Kuick, R; Hanash, S; Richardson, B; ,
Year
2009
Is Peer Reviewed?
Yes
Journal
Clinical Immunology
ISSN:
1521-6616
EISSN:
1521-7035
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Location
SAN DIEGO
Page Numbers
213-224
PMID
18945643
DOI
10.1016/j.clim.2008.08.009
Web of Science Id
WOS:000262882800010
Abstract
Killer-cell immunoglobulin-like receptor (KIR) genes are a polymorphic family expressed on NK cells, and "senescent" CD28-T cells implicated in cardiovascular disease. KIR promoters are highly homologous, and NK expression is regulated by DNA methylation. T cell. KIR regulation is poorly understood. We asked if epigenetic mechanisms and/or transcription factor alterations determine T cell KIR expression. DNA methylation inhibition activated multiple KIR genes in normal T cells. KIR2DL2 and KIR2DL4 were selected for further study. Expression of both was associated with promoter demethylation, and methylation of the promoters in reporter constructs suppressed expression. KIR reporter construct expression also increased in demethylated T cells and required Ets1, Sp1 and AML sites, implying effects on transcription factors. This was confirmed for Sp1. These results indicate that KIR genes are suppressed by DNA methylation in most T cells, and DNA demethylation promotes their expression through effects on both chromatin structure and transcription factors. Published by Elsevier Inc.
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity