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Stachybotrys chartarum

ABSTRACT: Stachybotrys chartarum overview

PROVIDER: PRJNA186396 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	SRR628246.fastq.gz	Fastqsanger.gz
	SRR628246_1.fastq.gz	Fastqsanger.gz
	SRR628246_2.fastq.gz	Fastqsanger.gz
	SRR628247.fastq.gz	Fastqsanger.gz

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Expression data analysis in lungs from mice induced for pulmonary arterial hypertension (PAH) by inhalation of Stachybotrys chartarum spores

Project description:It has been reported that repeated intra-tracheal instillation of S. chartarum spores induced significant pulmonary arterial remodeling in mice, which resulted in pathological changes like human pulmonary arterial hypertension (PAH) and elevation right ventricle systolic pressure. Then, we used microarrays to know the complex molecular mechanisms that underlie pathogenesis of PAH. Isolates of Stachybotrys chartarum were used. Ddy mice were anesthetized and the spore suspension was intratracheally injected 12 times, i.e. 1×104 spores into each mouse at 4-5 day intervals for 8 weeks. Mice were sacrificed one week after the final injection and then examined. Lung tissue specimens from mice model of PAH (n=3) and normal controls (n=3) were obtained. RNA targets preparation were performed according to the manufacturer's protocol using GeneChip(R) 3' IVT Express Kit (Affymetrix). One hundred nanograms of total RNA was converted into double-stranded cDNA template for transcription. In vitro transcription synthesized amplified RNA (aRNA) and incorporated a biotin-conjugated nucleotide. After purification and fragmentation of aRNA, 12.5 ug of them was hybridized to GeneChip(R) Mouse Genome 430 2.0 Array (Affymetrix).The Probe Array was scanned using a GeneChip(R) Scanner 3000 7G.

2010-07-28 | E-GEOD-23178 | biostudies-arrayexpress

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Strain differences influence murine pulmonary responses to Stachybotrys chartarum.

Project description:When the fungus Stachybotrys chartarum is inhaled, its mycotoxins may cause lung injury and inflammation. The severity of human responses to S. chartarum in both occupational and home settings varies widely. To explore these differences, we intratracheally instilled C3H/HeJ, BALB/c, and C57BL/6J mice with S. chartarum spores suspended in saline. One day later, the mice were humanely killed, bronchoalveolar lavage (BAL) was performed, and biochemical and cellular indicators of lung injury and inflammation were measured. BALB/c mice showed the highest myeloperoxidase activity, albumin and hemoglobin levels, and neutrophil numbers in their BAL among the three strains. BALB/c was the only strain to show significant increases in keratinocyte-derived cytokine (KC), monocyte chemotactic protein (MCP)-1, MCP-3, macrophage inflammatory protein (MIP)-1alpha, MIP-1beta, MIP-1gamma, MIP-2, RANTES, IL-1alpha, IL-1beta, IL-3, IL-6, IL-18, leukemia inhibitory factor, macrophage colony-stimulating factor, and TNF-alpha. A model of allergen-induced airway inflammation was examined to assess whether underlying allergic inflammation might contribute to increased susceptibility to S. chartarum-induced pulmonary inflammation and injury. Surprisingly, in BALB/c mice, ovalbumin-induced airway inflammation produced a protective effect against some S. chartarum-induced pulmonary responses. This is the first report of mammalian strain differences affecting responses to S. chartarum. These responses differ from those reported for LPS and other fungi. Analogous underlying genetic differences may contribute to the wide range of sensitivity to Stachybotrys among humans.

| S-EPMC2643262 | biostudies-literature

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