Gaitanis, G, Magiatis, P, Mexia, N et al. (4 more authors) (2019) Antifungal activity of selected Malassezia indolic compounds detected in culture. Mycoses, 62 (7). pp. 597-603. ISSN 0933-7407
Abstract
Background: Malassezia yeasts produce bioactive indolic substances when grown on L‐tryptophan agar. A panel of these substances was tested against commensal and opportunistic fungi, the Minimum Inhibitory Concentration (MIC) was determined and the potential for in loco antifungal activity on the skin was assessed.
Materials and Methods: Eight indoles were included (malassezin, pityriacitrin, indirubin, indolo[3,2‐b]carbazole, 6‐formylindolo[3,2‐b]carbazole, tryptanthrin, 6‐hydroxymethylindolo[3,2‐b]carbazole and 6‐methylindolo[3,2‐b]carbazole) and were tested against 40 fungal strains [yeasts: Malassezia spp.(N = 9); Cryptococcus spp.(N = 10); Candida spp.(N = 7); Yarrowia lipolytica(N = 1); Exophialla dermatitidis (N = 2); moulds: Aspergillus spp.(N = 7); Fusarium spp.(N = 2); Rhizopus oryzae(N = 2)]. The concentration of 5/8 of the tested indoles on diseased skin was calculated from published data. Kruskal‐Wallis and Mann‐Whitney U tests were employed for group susceptibility evaluation in 33 strains.
Results: The MIC range was 0.125‐32 μg/mL, and the median log2MIC was four. Indirubin was the most potent antifungal agent and differed significantly from the others. The highest median MIC was found for FICZ.
Malassezia with Candida strains were more susceptible compared to Cryptococcus and Aspergillus, and this inhibitory activity was predicted to be valid also on human skin.
Conclusions: Malassezia yeasts produce indolic species that inhibit an array of clinically significant yeasts and moulds.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2019 Blackwell Verlag Gmb. This is the peer reviewed version of the following article:Gaitanis, G, Magiatis, P, Mexia, N, et al. Antifungal activity of selected Malassezia indolic compounds detected in culture. Mycoses. 2019; 62: 597– 603, which has been published in final form at https://doi.org/10.1111/myc.12893. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | antifungal; indirubin; indoles; Malassezia; tryptophan |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Arts, Humanities and Cultures (Leeds) > School of Design (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 06 Mar 2019 15:52 |
Last Modified: | 12 Jan 2020 01:38 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1111/myc.12893 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:143331 |