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Coccidioides immitis RS strain:RS

ABSTRACT: Coccidioides immitis RS strain:RS Transcriptome or Gene expression

PROVIDER: PRJNA169242 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR516231.fastq.gz	Fastqsanger.gz
	SRR516233.fastq.gz	Fastqsanger.gz
	SRR516236.fastq.gz	Fastqsanger.gz
	SRR516239.fastq.gz	Fastqsanger.gz
	SRR516240.fastq.gz	Fastqsanger.gz

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Gene expression in human fungal pathogen Coccidioides immitis changes as mycelia differentiate into spherules and mature

Project description:Coccidioides immitis (C. immitis) is a dimorphic fungus that causes disease in mammals including human beings. It grows as a mycelium in the soil but differentiates into a pathogenic structure called a spherule in the host. We compared the transcriptome of C. immitis mycelia and day 2 and day 8 spherules grown in vitro using a custom custom oligonucleotide microarray from Nimblegen. C. immitis RS strain isolated from infected mice was grown on agar. Arthroconidia was harvested and inoculated into mycelial spores. RNA was extracted from spores at different days post-inoculation and hybridized to a custom Nimblegen array, in order to identify differentially expressed genes between mycelia and spherules.

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Project description:Gene expression in human fungal pathogen Coccidioides immitis changes as mycelia differentiate into spherules and mature

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Gene expression in human fungal pathogen Coccidioides immitis changes as mycelia differentiate into spherules and mature

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Factors regulated by interferon gamma and hypoxia-inducible factor 1A contribute to responses that protect mice from Coccidioides immitis infection.

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Factors regulated by interferon gamma and hypoxia-inducible factor 1A contribute to responses that protect mice from Coccidioides immitis infection.

Project description:Mouse strains have been identified that are resistant (i.e. DBA/2) or susceptible (i.e. C57BL/6) to infection from pathogenic fungus Coccidioides immitis. However, the genetic and immunological basis for this difference has not been fully characterized. Microarray technology was used to identify genes that were differentially expressed in lung tissue between resistant DBA/2 and sensitive C57BL/6 mice after infection with C. immitis. C57BL/6 and DBA/2 mice were infected with arthoconidia of C. immitis and RNA was extracted at different days post-infection and hybridized to Affymetrix microarrays (MGU74Av2), in order to identify differentially expressed genes between the two strains.

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RNA-seq transcriptional analysis of mouse lung tissue with and without Coccidioides immitis lung infection

Project description:Our previous data suggested that CXC ELR+ chemokines might be involved in neutrophil recruitment to the lungs during Coccidioides infection. To test that hypothesis, we infected IL-8R2 (Cxcr2) KO mice on a BALB/c background. IL-8R2 KO mice had fewer neutrophils in infected lungs than BALB/c controls, but unexpectedly the IL-8R2 KO mice also had 10-fold fewer organisms in their lungs than did control mice. To better understand the differences in IL-8R2 KO mouse lungs during Coccidioides infection we performed RNA-seq on lung tissue from uninfected and Coccidioides immitis infected mouse lungs in control and IL-8R2 (Cxcr2) KO mice. IL-8R2 KO mouse lungs had higher expression of genes associated with lymphocyte activation, including Th1 and Th17-related genes Ifnγ and Il17a and transcription factors Stat1 and Rorc. Bronchial alveolar lavage (BAL) fluid from infected IL-8R2 KO mice similarly contained more IL-17A and IFNγ.

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Project description:Coccidioides immitis and posadasii are dimorphic fungi that transform from mycelia with internal arthroconidia in the soil to a tissue form known as a spherule. Genes that were highly up-regulated in young spherules include a spherule surface protein and iron and copper membrane transporters. Genes that are unique to Coccidioides spp. are also over-represented in this group, suggesting that they may be important for spherule differentiation. Enriched GO terms in up-regulated genes in young spherules include oxidation/reduction, response to stress and membrane proteins. Down-regulated genes are enriched for transcription factors, especially helix-loop-helix and C2H2 type zinc finger domain-containing proteins which is consistent with the dramatic change in transcriptional profile. Almost all genes that are up-regulated in young spherules remain up-regulated in mature spherules, but a small number of genes are differentially expressed in those two stages of spherule development. Mature spherules express more Hsp31, and amylase than young spherules and less tyrosinase. Some expression of transposons was detected and most of the differentially expressed transposons were up-regulated in spherules.

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