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- Title
Sterol Composition of Clinically Relevant Mucorales and Changes Resulting from Posaconazole Treatment.
- Authors
Müller, Christoph; Neugebauer, Thomas; Zill, Patrizia; Lass-Flörl, Cornelia; Bracher, Franz; Binder, Ulrike; Zhou, Wenxu; Guo, De-An
- Abstract
Mucorales are fungi with increasing importance in the clinics. Infections take a rapidly progressive course resulting in high mortality rates. The ergosterol biosynthesis pathway and sterol composition are of interest, since they are targeted by currently applied antifungal drugs. Nevertheless, Mucorales often exhibit resistance to these drugs, resulting in therapeutic failure. Here, sterol patterns of six clinically relevant Mucorales (<italic>Lichtheimia corymbifera</italic>, <italic>Lichtheimia ramosa</italic>, <italic>Mucor circinelloides</italic>, <italic>Rhizomucor pusillus</italic>, <italic>Rhizopus arrhizus</italic>, and <italic>Rhizopus microsporus</italic>) were analysed in a targeted metabolomics fashion after derivatization by gas chromatography-mass spectrometry. Additionally, the effect of posaconazole (POS) treatment on the sterol pattern of <italic>R. arrhizus</italic> was evaluated. Overall, fifteen different sterols were detected with species dependent variations in the total and relative sterol amount. Sterol analysis from <italic>R. arrhizus</italic> hyphae confronted with sublethal concentrations of posaconazole revealed the accumulation of 14-methylergosta-8,24-diene-3,6-diol, which is a toxic sterol that was previously only detected in yeasts. Sterol content and composition were further compared to the well-characterized pathogenic mold <italic>Aspergillus fumigatus</italic>. This work contributes to a better understanding of the ergosterol biosynthesis pathway of Mucorales, which is essential to improve antifungal efficacy, the identification of targets for novel drug design, and to investigate the combinatorial effects of drugs targeting this pathway.
- Subjects
MUCORALES; ZYGOMYCOSIS; GAS chromatography; FUNGI; MORTALITY
- Publication
Molecules, 2018, Vol 23, Issue 5, p1218
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules23051218