Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Expression data from FDFT1 overexpression lung cancer cell lines.

ABSTRACT: FDFT1 catalyzes the first reaction in the mevalonate/isoprenoid pathway, we demonstrated that FDFT1 down-regulation by two shRNAs significantly reduced cell migration and invasion in highly invasive lung cancer cell lines in vitro, as well as in lung metastases in vivo. We used microarrays to detail the FDFT1 regulated gene expression underlying invasion-metastasis cascade and identified distinct classes of up-regulated genes during this process. Lung adenocarcinoma cells with FDFT1 overexpression were selected for RNA extraction and hybridization on Affymetrix microarrays.

ORGANISM(S): Homo sapiens

SUBMITTER: Michael Hsiao

PROVIDER: E-GEOD-37868 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:Isoprenoids are a class of ubiquitous organic molecules synthesized from the five-carbon starter unit isopentenyl pyrophosphate (IPP). Comprising more than 30,000 known natural products, isoprenoids serve various important biological functions in many organisms. In bacteria, undecaprenyl pyrophosphate is absolutely required for the formation of cell wall peptidoglycan and other cell surface structures, while ubiquinones and menaquinones, both containing an essential prenyl moiety, are key electron carriers in respiratory energy generation. There is scant knowledge on the nature and regulation of bacterial isoprenoid pathways. In order to explore the cellular responses to perturbations in the mevalonate pathway, responsible for producing the isoprenoid precursor IPP in many Gram-positive bacteria and eukaryotes, we constructed three strains of Staphylococcus aureus in which each of the mevalonate pathway genes is regulated by an IPTG inducible promoter. We used DNA microarrays to profile the transcriptional effects of downregulating the components of the mevalonate pathway in S. aureus and demonstrate that decreased expression of the mevalonate pathway leads to widespread downregulation of primary metabolism genes, an upregulation in virulence factors and cell wall biosynthetic determinants, and surprisingly little compensatory expression in other isoprenoid biosynthetic genes. We subsequently correlate these transcriptional changes with downstream metabolic consequences. We used microarrays to profile the transcriptional changes incurred when downregulating mvaS, mvaA, or mvaK in S. aureus. Keywords: stress response S. aureus mutants were generated in which mvaS, mvaA, or mvaK were placed under control of the IPTG-inducible Pspac promoter. These mutants, as well as wildtype RN4220 S. aureus, were grown with or without 1 mM IPTG, harvested in exponential phase, and their total RNA was extracted and hybridized to Affymetrix GeneChips. Experiments were done in triplicate.

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Expression data from FDFT1 overexpression lung cancer cell lines.

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