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SIDRA

GXB

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Description

The Monocyte Advantage-GSE12838

Hypothesis

The informational content of circulating leukocytes differs, thereby allowing one to rank leukocyte populations on their potential to contribute to RNA diagnostics for pneumonia.

Experimental Design

Four patients over several timepoints measured three different cell types for VAP signal

Methods

Sixteen patients (10 male, 6 female) at risk for VAP were entered into our IRB-approved study that collects blood and clinical data every 48 hours for up to 21 days. Four of the sixteen patients developed VAP as diagnosed and treated by the attending ICU physician. Previously reported blood protocols were used to isolate buffy coat, enriched neutrophil, and enriched monocyte populations by using negative selection. Cellular purity was assessed by FACS for one of the 4 VAP patients. Genome-wide expression analysis was performed on RMA-normalized signal from Affymetrix U133 2.0 Plus GeneChips. EDGE software (FDR=0.10) was used to determine changes in mRNA abundance over time for each cell population.

Additional Information

Cobb JP, Schierding W, Dixon D, Ruan J, Oppedal D, MacMillan S, Brownstein B, Zhang W

Platform Affymetrix HG-U133_Plus_2
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sampleset4000088_sampleannotations.csv

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