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Title: Age-associated Changes in Basal NF-κB Function in Human CD4+ T Lymphocytes via Dysregulation of PI3 Kinase (dataset 1)      
availability:
available
aggregation:
instance of dataset
privacy:
not applicable
refinement:
curated
dateReleased:
01-09-2015
ID:
E-GEOD-62331
description:
Immune impairment and high circulating level of pro-inflammatory cytokines are landmarks of human aging. However, the molecular basis of immune dysregulation and the source of inflammatory markers remain unclear. Here we demonstrate that in the absence of overt cell stimulation, gene expression mediated by the transcription factor NF-κB is higher in purified and rested human CD4+ T lymphocytes from older compared to younger individuals. This increase of NF-κB -associated transcription includes transcripts for pro-inflammatory cytokines such as IL-1 and chemokines such as CCL2 and CXCL10. We demonstrate that NF-κB up-regulation is cell-intrinsic and mediated in part by phosphatidylinositol 3-kinase (PI3K) activity induced in response to metabolic activity, which can be moderated by rapamycin treatment. Our observations provide direct evidence that dysregulated basal NF-κB activity may contribute to the mild pro-inflammatory state of aging. Peripheral blood mononuclear cells (PBMCs) were isolated from heparinized blood using Ficoll-Paque Plus density gradient centrifugation. CD4+ T cells were obtained by positive selection using anti-human CD4 microbeads. After a 4h incubation at 37ºC (5% CO2 incubator), cells were harvested and collected by centrifugation. Total cellular RNA was prepared using Qiagen RNeasy protocols. Labeling and amplification were done with the standard Illumina protocol, and the biotin-labeled cRNA was hybridized to Illumina's HumanRef-8 v2.0 Expression BeadChip. The arrays were washed, blocked and the biotin-labeled cRNA was detected by staining with streptavidin-Cy3. Samples were divided into 2 age groups, young and old, with the cut off at 65 years and above as old.
keywords:
transcription profiling by array
format:
HTML
storedIn:
Array Express
qualifier:
not compressed
accessType:
landing page
authorization:
none
authentication:
none
primary:
true
accessURL: https://www.ebi.ac.uk/arrayexpress/experiments/E-GEOD-62331
format:
JSON
storedIn:
OmicsDI
qualifier:
not compressed
accessType:
download
authorization:
none
authentication:
none
primary:
false
accessURL: www.omicsdi.org/ws/dataset/arrayexpress-repository/E-GEOD-62331.json
format:
XML
storedIn:
OmicsDI
qualifier:
not compressed
accessType:
download
authorization:
none
authentication:
none
primary:
false
accessURL: http://www.omicsdi.org/ws/dataset/arrayexpress-repository/E-GEOD-62331.xml
ID:
SCR:014747
name:
Omics Discovery Index
abbreviation:
OmicsDI
homePage: http://www.omicsdi.org/