Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcription profiling of mouse lungs of C57BL6 mice following aerosol infection with Mycobacterium tuberculosis for 30 and 70 days

ABSTRACT: B6 mice have been infected via the aerosol route with a low-dose (100 CFUs)of Mycobacterium tuberculosis for 30 days and 70 days.

Uninfected mice have been used as experimental controls.

ORGANISM(S): Mus musculus

SUBMITTER: Jean-François Marquis

PROVIDER: E-MEXP-1899 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Disseminated and rapidly fatal tuberculosis in mice bearing a defective allele at IFN regulatory factor 8.

Marquis Jean-François JF LaCourse Ronald R Ryan Lynn L North Robert J RJ Gros Philippe P

Journal of immunology (Baltimore, Md. : 1950) 20090301 5

The interferon regulatory factor (IRF) family member IRF-8 participates in IFN-gamma-dependent transcriptional activation of genes containing in their promoter regions IFN-stimulated response element or IFN-gamma activation site elements. To test the role of IRF-8 in host defenses against tuberculosis, BXH-2 mice, which bear a defective IRF-8(R294C) allele, were challenged with low doses of virulent Mycobacterium tuberculosis via the i.v. and aerosol routes. BXH-2 mice were found to be extremely ...[more]

PMID: 19234196

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Project description:Phenotypic plasticity, the ability of one genotype to express different phenotypes in response to changing environmental conditions, is one of the most common phenomena characterising the living world and is not only relevant for the ecology but also for the evolution of species. Daphnia, the waterflea, is a textbook example for predator induced phenotypic plastic defences including changes in life-history, behaviour and morphology. However, the analysis of molecular mechanisms underlying these inducible defences is still in its early stages. We exposed Daphnia magna to chemical cues of the predator Triops cancriformis to identify key processes underlying plastic defensive trait formation. D. magna is known to develop an array of morphological changes in the presence of T. cancriformis including changes of carapace morphology and cuticle hardening. To get a more comprehensive idea of this phenomenon, we studied four different genotypes originating from habitats with different predation history, reaching from predator-free to temporary habitats containing T. cancriformis. We analysed the morphologies as well as proteomes of predator-exposed and control animals. Three genotypes showed morphological changes when the predator was present. Using a high-throughput proteomics approach, we found 294 proteins which were significantly altered in their abundance after predator exposure in a general or genotype dependant manner. Proteins connected to genotype dependant responses were related to the cuticle, protein synthesis and calcium binding whereas the yolk protein vitellogenin increased in abundance in all genotypes, indicating their involvement in a more general response. Furthermore, genotype dependant responses at the proteome level correlated well with local adaptation to Triops predation. Altogether, our study provides new insights concerning genotype dependant and general molecular processes involved in predator-induced phenotypic plasticity in D. magna.

Dataset Information

Transcription profiling of mouse lungs of C57BL6 mice following aerosol infection with Mycobacterium tuberculosis for 30 and 70 days

Publications

Disseminated and rapidly fatal tuberculosis in mice bearing a defective allele at IFN regulatory factor 8.

Similar Datasets

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