Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Expression profiling of Hyperoxia-Tolerant Drosophila melanogaster

ABSTRACT: One of the critical substances that mammals highly regulate via the respiratory, cardiovascular and neurologic systems is O2. Both low and high O2 levels can induce major morbidities as well as mortality. Indeed, O2 has been often considered as both an elixir and a poison in humans. In current study, we have used an experimental selection approach to generate Drosophila strains that are tolerant to severe hyperoxic environment. Gene expression profiling is then applied to investigate the mechanisms underlying hyperoxia tolerance in the newly generated strains. 27 isogenic D. melanogaster Lines were pooled and following long-term selection over generations with increased oxygen level in the culture environment. The differences in gene expression were compared between adapted flies and generation matched naive controls by microarray.

ORGANISM(S): Drosophila melanogaster

SUBMITTER: Dan Zhou

PROVIDER: E-GEOD-12160 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Experimental selection for Drosophila survival in extremely high O2 environments.

Zhao Huiwen W HW Zhou Dan D Nizet Victor V Haddad Gabriel G GG

PloS one 20100723 7

Although oxidative stress is deleterious to mammals, the mechanisms underlying oxidant susceptibility or tolerance remain to be elucidated. In this study, through a long-term laboratory selection over many generations, we generated a Drosophila melanogaster strain that can live and reproduce in very high O(2) environments (90% O(2)), a lethal condition to naïve flies. We demonstrated that tolerance to hyperoxia was heritable in these flies and that these hyperoxia-selected flies exhibited phenot ...[more]

PMID: 20668515

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Project description:Background. In experimental setting the concept of myocardial preconditioning-by hyperoxia has been introduced and different intracellular protective mechanisms and their effects have been described. To study whether similar protective phenotype can be induced by hyperoxia also in humans, gene expression profile after hyperoxic exposure was analyzed. Methods and Findings. Adult patients were randomized to be ventilated with either FiO2 0.4 (n=14) or 1.0 (n=10) for 60 minutes before coronary artery bypass grafting. A tissue sample from the right atrial appendage was taken for gene analysis and expression profile analysis on genome wide level by gene chip analysis was applied. Exposure to > 96% oxygen for 60 minutes significantly changed the expression of 20 different genes, including upregulation of two different humanins - MTRNR2L2 and MTRNR2L8, and activated a “cell survival” network as detected by Ingenuity Pathway Analyses. Conclusions. Administration of > 96% oxygen for 1 hour changes gene expression in the myocardium of the patients with coronary artery disease and may enhance cell survival capability. Background. In experimental setting the concept of myocardial preconditioning-by hyperoxia has been introduced and different intracellular protective mechanisms and their effects have been described. To study whether similar protective phenotype can be induced by hyperoxia also in humans, gene expression profile after hyperoxic exposure was analyzed. Methods and Findings. Adult patients were randomized to be ventilated with either FiO2 0.4 (n=14) or 1.0 (n=10) for 60 minutes before coronary artery bypass grafting. A tissue sample from the right atrial appendage was taken for gene analysis and expression profile analysis on genome wide level by gene chip analysis was applied. Exposure to > 96% oxygen for 60 minutes significantly changed the expression of 20 different genes, including upregulation of two different humanins - MTRNR2L2 and MTRNR2L8, and activated a “cell survival” network as detected by Ingenuity Pathway Analyses. Conclusions. Administration of > 96% oxygen for 1 hour changes gene expression in the myocardium of the patients with coronary artery disease and may enhance cell survival capability. 24 samples, 14 controls and 10 with intervention

Dataset Information

Expression profiling of Hyperoxia-Tolerant Drosophila melanogaster

Publications

Experimental selection for Drosophila survival in extremely high O2 environments.

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