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Transcription profiling of human peripheral blood mononuclear cells, or whole blood were isolated 0, 30 min, 6 h, 24 h, and 7 day after intravenous endotoxin challenge vs controls


ABSTRACT: Peripheral blood mononuclear cells were isolated 0, 30 min, 6 h, 24 h, and 7 day after intravenous endotoxin challenge using cell preparation tubes (Vacutainer® CPT). The PBMC layer was lysed with RLT buffer, homogenized, and then stored at –80°C. Total RNA was extracted as per RNeasy‚ Midi protocol (Qiagen). Double stranded cDNA was synthesized from total RNA (5 to 20 µg) using 7-d(T)24 primer and SuperScript‰ Double-Stranded cDNA Synthesis Kit and purified by phase lock gel-phenol/chloroform extraction followed by ethanol precipitation. Biotin-labeled cRNA was prepared by in vitro transcription using HighYield‰ RNA Transcript Labeling Kit followed by fragmentation with 5X fragmentation buffer. Fragmented cRNA (10 µg) was hybridized to Affymetrix Hu95Av2 oligonucleotide probe arrays for 16 h at 45?C. After removal of hybridization fluid, the arrays were washed, stained with streptavidin phycoerythrin (SAPE), and signal amplified by anti-streptavidin antibody using Affymetrix Fluidics Station 400. Probe set signals were measured using Agilent GeneArray Scanner (Affymetrix‚, Santa Clara, CA).

ORGANISM(S): Homo sapiens

SUBMITTER: Anthony Suffredini 

PROVIDER: E-GEOD-3026 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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To define gene expression profiles that occur during the initial activation of human innate immunity, we administered intravenous endotoxin (n = 8) or saline (n = 4) to healthy subjects and hybridized RNA from blood mononuclear cells (0, 0.5, 6, 24, 168 h) or whole blood (0, 3, 6, 24, 168 h) to oligonucleotide probe arrays. The greatest change in mononuclear cell gene expression occurred at 6 h (439 induced and 428 repressed genes, 1% false discovery rate, and 50% fold change) including increase  ...[more]

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