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Gene expression profile changes in PKC-inhibitor-pretreated HT1080 cells cells after TLR3 stimulation

ABSTRACT: TLR3 stimulation by extracellular dsRNA (e.g. polyIC) induces expression of numerous genes. The inhibition of PKC by Go6976 prior to TLR3 stimulation leads to an ablation of expression of IRF-3-dependent genes.

ORGANISM(S): Homo sapiens

PROVIDER: GSE43217 | GEO | 2013/04/03

SECONDARY ACCESSION(S): PRJNA184996

REPOSITORIES: GEO

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Gene expression profile changes in PKC-inhibitor-pretreated HT1080 cells cells after TLR3 stimulation

Project description:TLR3 stimulation by extracellular dsRNA (e.g. polyIC) induces expression of numerous genes. The inhibition of PKC by Go6976 prior to TLR3 stimulation leads to an ablation of expression of IRF-3-dependent genes. Total RNA extracted from HT1080 cells with or without 1 h pretreatment with 5 uM Go6976, after 6 h of treatment with dsRNA (polyIC), compared to untreated controls

2013-04-03 | E-GEOD-43217 | biostudies-arrayexpress

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PKC Activation Induces Inflammatory Response and Cell Death in Human Bronchial Epithelial Cells

Project description:A variety of airborne pathogens can induce inflammatory responses in airway epithelial cells, which is a crucial component of host defence. However, excessive inflammatory responses and chronic inflammation also contribute to different diseases in the respiratory system. We hypothesized that the activation of protein kinase C (PKC) is one of the essential mechanisms of inflammatory responses in airway epithelial cells. In the present study, we stimulated human bronchial lung epithelial (BEAS-2B) cells with phorbol ester Phorbol 12, 13-dibutyrate (PDBu), and examined gene expression profile with microarray analysis. Bioinformatics suggested that PKC activation induced dramatic changes in gene expression related to multiple cellular functions. The top two functional networks of genes were centered on NFM-NM-:B and TNF-M-NM-1, which are two commonly known pathways for cell death and inflammation. Subsequent tests confirmed the decrease in cell viability and increase in the production of various cytokines. Interestingly, each of the increased cytokines was differentially regulated at mRNA and/or protein levels by different sub-class of PKC isozymes. We conclude that many pathogen-induced cell death and cytokine production in airway epithelial cells may be mediated through PKC related signaling pathways. These findings suggest that PKCs can be new targets for treatments of lung diseases. Three groups of BEAS-2B cells were prepared: control, 0.5 hour of PDBu stimulation, and 4 hours of PDBu stimulation. Each group consisted of three biological replicates.

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