Transcriptome analysis of Aspergillus fumigatus exposed to voriconazole.

Current Genetics
Márcia Eliana da Silva FerreiraGustavo H Goldman

Abstract

For a comprehensive evaluation of genes that have their expression modulated during exposure of the mycelia to voriconazole, we performed a large-scale analysis of gene expression in Aspergillus fumigatus using a microarray hybridization approach. By comparing the expression of genes between the reference time and after addition of voriconazole (30, 60, 120, and 240 min), we identified 2,271 genes differentially expressed in the wild-type strain. To validate the expression of some of these genes during exposure to voriconazole, we analyzed 13 genes showing higher expression in the presence of voriconazole by real-time RT-PCR. Although the magnitudes of induction differed between the two experimental systems, in about 85% of the cases they were in good agreement with the microarray data. To our knowledge this is the first study of microarray hybridization analysis for a filamentous fungus exposed to an antifungal agent. In our study, we have observed: (i) a decreased mRNA expression of various ergosterol biosynthesis genes; (ii) increased mRNA levels of genes involved in a variety of cell functions, such as transporters, transcription factors, proteins involved in cell metabolism, and hypothetical proteins; and (iii) the involve...Continue Reading

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Aspergillosis (ASM)

Aspergillosis is the name given to a wide variety of diseases caused by infection by fungi of the genus Aspergillus. Aspergillosis occurs in chronic or acute forms which are clinically very distinct. Most cases of acute aspergillosis occur in patients with severely compromised immune systems. Chronic colonization or infection can cause complications in people with underlying respiratory illnesses. Discover the latest research on aspergillosis here.

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An antifungal, also known as an antimycotic medication, is a pharmaceutical fungicide or fungistatic used to treat and prevent mycosis such as athlete's foot, ringworm, candidiasis, cryptococcal meningitis, and others. Discover the latest research on antifungals here.