The lipid profile of three Malassezia species assessed by Raman spectroscopy and discriminant analysis - PubMed (original) (raw)
The lipid profile of three Malassezia species assessed by Raman spectroscopy and discriminant analysis
Chrysoula Petrokilidou et al. Mol Cell Probes. 2019 Aug.
Abstract
Malassezia yeasts constitute the major eukaryotic cutaneous flora of homoeothermic vertebrates. These lipophilic yeasts are able to cause, trigger, or aggravate common skin diseases under favorable conditions. Species identification and subspecies differentiation is currently based on morphological characteristics, lipid assimilation profile, and molecular tests. Mass spectrometry has been also reported as a reliable, yet costly and labor-intensive, method to classify Malassezia yeasts. Here, we introduce Raman spectroscopy as a new molecular technique able to differentiate three phylogenetically close Malassezia species (M.globosa, M.pachydermatis, and M.sympodialis) by examining their lipid metabolic profile. Using Raman spectroscopy, lipid fingerprints of Malassezia cultures on Leeming-Notman agar, were analyzed by spectral bands assignment and partial least squares discriminant analysis. Our results demonstrate differential utilization of lipid supplements among these three species and the ability of Raman spectroscopy to rapidly and accurately discriminate them by predictive modelling.
Keywords: Fatty acids; Lipids; Malassezia; Multivariate analysis; PLS-DA; Raman spectroscopy.
Copyright © 2019 Elsevier Ltd. All rights reserved.
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