Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Comparison of Fusobacterium Nucleatum stimulated and unstimulated neutrophils

ABSTRACT: Neutrophils are known to be stimulated by different periodontal bacteria to produce reactive oxygen species and cytokines. It is inportant to investigate the gene changes made by bacteria of importance, of which, for periodontal disease, fusobaterium nucleatum is one. we used microarrays to investigate gene experssion changes in peripheral blood neutrophils werwhich e stimulated with or with out Fusobacterium Nucleatum (10953). Neutrophils from periodonatlly healthy individuals (n=4) were isolated and stimulated for 3hrs with or without fusobaterium nucleatum (10953). RNA was then extracted from these and pooled before hybridization on Affymetrix microarrays

ORGANISM(S): Homo sapiens

SUBMITTER: Helen Wright

PROVIDER: E-GEOD-20151 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Fusobacterium nucleatum regulation of neutrophil transcription.

Wright H J HJ Chapple I L C IL Matthews J B JB Cooper P R PR

Journal of periodontal research 20110201 1

<h4>Background and objective</h4>Abnormal neutrophil responses have been observed in periodontitis patients, including hyper-reactivity in terms of production of reactive oxygen species (ROS) following exposure to the key quorum-sensing plaque bacterium, Fusobacterium nucleatum. This study was designed to characterize the transcriptional response of neutrophils to F. nucleatum.<h4>Material and methods</h4>Peripheral blood neutrophils were exposed to F. nucleatum, and gene expression was analysed ...[more]

PMID: 20663022

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Project description:Although the accumulation of neutrophils in the lungs and airways is common to many inflammatory lung diseases, including acute lung injury, the alterations that neutrophils undergo as they leave the peripheral circulation and migrate into the lungs have not been well characterized. Human volunteers were exposed to endotoxin by bronchoscopic instillation. The resulting air space neutrophil accumulation and peripheral blood neutrophils were isolated 16 h later, compared with circulating neutrophils isolated before or after to the pulmonary endotoxin exposure, and compared with circulating neutrophils exposed to endotoxin in vitro. Microarray analysis was performed on air space, circulatory, and in vitro endotoxin-stimulated neutrophils. Functional analysis included the determination of neutrophil apoptosis, chemotaxis, release of cytokines and growth factors, and superoxide anion release. Dramatic gene expression differences were apparent between air space and circulating neutrophils: approximately 15% of expressed genes have altered expression levels, including broad increases in inflammatory- and chemotaxis-related genes, as well as antiapoptotic and IKK-activating pathways. Functional analysis of air space compared with circulating neutrophils showed increased superoxide release, diminished apoptosis, decreased IL-8-induced chemotaxis, and a pattern of IL-8, macrophage inflammatory protein-1beta, monocyte chemoattractant protein-1, and tumor necrosis factor-alpha release different from either unstimulated or LPS-stimulated circulating neutrophils. Many of these changes are not elicited by in vitro treatment with endotoxin. Limited differences were detected between circulating neutrophils isolated before and 16 h after pulmonary endotoxin instillation. These results suggest that neutrophils sequestered in the lung become fundamentally different from those resident in the circulation, and this difference is distinct from in vitro activation with endotoxin.

Dataset Information

Comparison of Fusobacterium Nucleatum stimulated and unstimulated neutrophils

Publications

Fusobacterium nucleatum regulation of neutrophil transcription.

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