Ontology highlight
ABSTRACT:
PROVIDER: PRJNA491310 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR7849281_1.fastq.gz | Fastqsanger.gz | |||
| SRR7849281_2.fastq.gz | Fastqsanger.gz | |||
| SRR7849282_1.fastq.gz | Fastqsanger.gz | |||
| SRR7849282_2.fastq.gz | Fastqsanger.gz | |||
| SRR7849283_1.fastq.gz | Fastqsanger.gz |
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Project description:Carbon monoxide (CO) abrogates TNF-alpha mediated inflammatory responses in endothelial cells, yet, the underlying mechanism hereof is still elusive. We sought to explore potential mechanisms by which CO down-regulates VCAM-1 expression on TNF-alpha stimulated human umbilical vein endothelial cells (HUVEC). By genome-wide gene expression profiling and pathway analysis we studied the relevance of particular pathways for the anti-inflammatory effect of CO. In CO-releasing molecules-3 (CORM-3) stimulated HUVEC, significant changes in gene expression were found for genes implicated in the proteasome and porphyrine pathways. Although proteasome activities were increased by CORM-3, proteasome inhibitors did not abolish CORM-3‘s effect. Likewise, HO-1 inhibitors did not abrogate the ability of CORM-3 to down-regulate VCAM-1 expression. MAPK p38 was inhibited by CORM-3. Accordingly, VCAM-1 expression was down-regulated by the p38 inhibitor SB203580. Down-regulation of VCAM-1 by CORM-3 only occurred at concentrations that partly inhibit ATP production. Sodium azide and oligomycin paralleled the effect of CORM-3 in this regard. In conclusion, down-regulation of VCAM-1 by CORM-3 seems to be mediated via inhibition of p38 and mitochondrial respiration. Although CORM-3 up-regulates several genes in the ubiquitin proteasome sytem (UPS) or porphyrin pathway, there is no evidence that these changes are involved in the anti-inflammatory properties of CORM-3.
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Project description:We recently reported that carbon monoxide (CO) has bactericidal activity. To understand its mode of action we analysed the gene expression changes occurring when Escherichia coli, grown aerobically and anaerobically, is treated with the carbon monoxide releasing molecule, CORM-2. The E. coli microarray analysis shows that E. coli CORM-2 response is multifaceted with a high number of differentially regulated genes spread through several functional categories, namely genes involved in inorganic ion transport and metabolism, regulators, and genes implicated in posttranslational modification, such as chaperones. CORM-2 has higher impact in E. coli cells grown anaerobically, as judged by the existence of repressed genes belonging to eight functional classes which are absent in aerobically CORM-2 treated cells. In spite of the relatively stable nature of the CO molecule, our results show that CO is able to trigger a significant alteration in the transcriptome of E. coli which necessarily has effects in several key metabolic pathways.
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