Functional genomic profiling of Aspergillus fumigatus biofilm reveals enhanced production of the mycotoxin gliotoxin
The opportunistic pathogenic mold Aspergillus fumigatus is an increasing cause of morbidity and mortality in immunocompromized and in part immunocompetent patients. A. fumigatus can grow in multicellular communities by the formation of a hyphal network encased in an extracellular matrix. Here, we de...
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| Main Authors: | , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
25 August 2010
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| In: |
Proteomics
Year: 2010, Volume: 10, Issue: 17, Pages: 3097-3107 |
| ISSN: | 1615-9861 |
| DOI: | 10.1002/pmic.201000129 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1002/pmic.201000129 Verlag, lizenzpflichtig, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/pmic.201000129 
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| Author Notes: | Sandra Bruns, Marc Seidler, Daniela Albrecht, Stefanie Salvenmoser, Nicole Remme, Christian Hertweck, Axel A. Brakhage, Olaf Kniemeyer and Frank-Michael C. Müller |
| Summary: | The opportunistic pathogenic mold Aspergillus fumigatus is an increasing cause of morbidity and mortality in immunocompromized and in part immunocompetent patients. A. fumigatus can grow in multicellular communities by the formation of a hyphal network encased in an extracellular matrix. Here, we describe the proteome and transcriptome of planktonic- and biofilm-grown A. fumigatus mycelium after 24 and 48 h. A biofilm- and time-dependent regulation of many proteins and genes of the primary metabolism indicates a developmental stage of the young biofilm at 24 h, which demands energy. At a matured biofilm phase, metabolic activity seems to be reduced. However, genes, which code for hydrophobins, and proteins involved in the biosynthesis of secondary metabolites were significantly upregulated. In particular, proteins of the gliotoxin secondary metabolite gene cluster were induced in biofilm cultures. This was confirmed by real-time PCR and by detection of this immunologically active mycotoxin in culture supernatants using HPLC analysis. The enhanced production of gliotoxin by in vitro formed biofilms reported here may also play a significant role under in vivo conditions. It may confer A. fumigatus protection from the host immune system and also enable its survival and persistence in chronic lung infections such as aspergilloma. |
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| Item Description: | Gesehen am 09.03.2023 |
| Physical Description: | Online Resource |
| ISSN: | 1615-9861 |
| DOI: | 10.1002/pmic.201000129 |