title: Isolation of transcripts overexpressed in the human pathogen Trichophyton rubrum grown in lipid as carbon source.
abstract: Trichophyton rubrum is the most common etiological agent of human dermatophytosis. Despite the incidence and medical importance of this dermatophyte, little is known about the mechanisms of host invasion and pathogenicity. Host invasion depends on the adaptive cellular responses of the pathogen that allow it to penetrate the skin layers, which are mainly composed of proteins and lipids. In this study, we used suppression subtractive hybridization to identify transcripts overexpressed in T. rubrum cultured in lipid as carbon source. Among the subtractive cDNA clones isolated, 85 clones were positively screened by cDNA array dot blotting and were sequenced. The putative proteins encoded by the isolated transcripts showed similarities to fungal proteins involved in metabolism, signaling, defense, and virulence, such as the MDR/ABC transporter, glucan 1,3-β-glucosidase, chitin synthase B, copper-sulfate-regulated protein, and serine/threonine phosphatase (calcineurin A). These results provide the first molecular insight into the genes differentially expressed during the adaptation of T. rubrum to a lipidic carbon source.
authors.affiliation: Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Brazil.
authors.forename: Fernanda C A
authors.initials: FC
authors.lastname: Maranhão
authors.forename: Henrique C S
authors.initials: HC
authors.lastname: Silveira
authors.forename: Antonio
authors.initials: A
authors.lastname: Rossi
authors.forename: Nilce M
authors.initials: NM
authors.lastname: Martinez-Rossi
mesh_terms: D002244:Carbon / Q000378:metabolism; D018076:DNA, Complementary / Q000235:genetics / Q000378:metabolism; D020224:Expressed Sequence Tags; D005656:Fungal Proteins / Q000235:genetics / Q000378:metabolism; D020869:Gene Expression Profiling; D015966:Gene Expression Regulation, Fungal; D006801:Humans; D006863:Hydrogen-Ion Concentration; D009693:Nucleic Acid Hybridization / Q000235:genetics; D020411:Oligonucleotide Array Sequence Analysis; D000069463:Olive Oil; D010938:Plant Oils / Q000378:metabolism*; D014249:Trichophyton / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism*
chemical_list: D018076:DNA, Complementary; D005656:Fungal Proteins; D000069463:Olive Oil; D010938:Plant Oils; D002244:Carbon