Trichophyton tonsurans
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA20579 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| Other | ||||
| SRR30861329_subreads.fastq.gz | Fastqsanger.gz |
Items per page: 5 1 - 2 of 2 |
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Project description:Purpose: The dermatophyte Trichophyton rubrum is an anthropophilic filamentous fungus that infects keratinized tissues and is the most common etiologic agent isolated in cases of human dermatophytoses. To better understand the molecular effects of stress responses and fungal adaptability, we evaluated the effects of acriflavine, a cytoxic drug, on T. rubrum transcriptome in a time-course assay using high-throughput RNA-seq technology. Results: RNA-seq generated approximately 200 million short reads that were mapped to the Broad Institute’s Dermatophyte Comparative Database before differential gene expression analysis. A subset of 490 genes modulated in response to stress caused T. rubrum exposure to acriflavine were identified. These genes are involved in various cellular processes such as oxidation-reduction reactions, transmembrane transport, metal ion binding, and pathogenicity. The genes involved in pathogenicity were down-regulated, suggesting that this drug interferes with virulence factors that allow the establishment and maintenance of host infection. Conclusion: The results obtained in this large-scale analysis provide insights into the molecular events underlying the stress responses of T. rubrum Acriflavine.
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Project description:A cDNA microarray was constructed from the expressed sequence tags (ESTs) of different developmental stages, and comparative genome hybridization based on microarray procedures were carried out. Dermatophyte species are classified into three genera: Epidermophyton, Microsporum, and Trichophyton. To determine the relationship between these three groups comparative genome hybridization were used in our experiment. Trichophyton rubrum genmic DNA was reference DNA and labelled by Cy3 while the other dermatophytes genomic DNA were test DNA and labelled by CY5. Test and reference DNA were co-hybridized with the T. rubrum cDNA microarray and the numbers of genes shared between each species and T. rubrum were determined. Keywords: Comparative Genomic Hybridization We used a Trichophyton rubrum cDNA microarray prepared in our lab through comparative genome hybridization of genomic DNA of 21 dermatophyte strains (belonging to 20 species) to elucidate the taxonomy and evolution profiles of 20 dermatophyte species. The numbers of genes shared between each species and T. rubrum were determined. Each strain DNA hybridized for 3 times. The slides were separated into three groups base on different datasets.
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Project description:Dermatophytes are highly specialized filamentous fungi which cause the majority of superficial mycoses in humans and animals. The high secreted proteolytic activity of these microorganisms during growth on proteins is assumed to be linked with their particular ability to exclusively infect keratinized host structures such as skin stratum corneum, hair and nails. Individual secreted dermatophyte proteases were recently described and linked with the in vitro digestion of keratin. However, the overall adaptation and transcriptional response of dermatophytes during protein degradation is largely unknown. To address this question, we constructed a cDNA microarray for the human pathogenic dermatophyte Trichophyton rubrum, which is based on transcripts of the fungus grown on proteins. Gene expression profiling during growth of T. rubrum on soy and keratin displayed the activation of a large set of genes encoding endo- and exoproteases. In addition, other specifically induced factors with potential implication in protein utilization were identified, including heat shock proteins, transporters, metabolic enzymes, transcription factors and hypothetical proteins with unknown function. This broad-scale transcriptional analysis of dermatophytes during growth on proteins reveals new putative pathogenicity related host adaptation mechanism of these human pathogenic fungi. Keywords: Two-condition experiment, strong proteolytic activity in the supernatant versus no proteolytic activity
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