Kumar M, Singh A, Kumari S, Kumar P, Wasi M, Mondal AK, Rudramurthy SM, Chakrabarti A, Gaur NA, Gow NAR, Prasad R. Sphingolipidomics of drug resistant Candida auris clinical isolates reveal distinct sphingolipid species signatures.
Biochim Biophys Acta Mol Cell Biol Lipids 2021;
1866:158815. [PMID:
32942047 DOI:
10.1016/j.bbalip.2020.158815]
[Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 08/26/2020] [Accepted: 09/10/2020] [Indexed: 12/16/2022]
Abstract
Independent studies from our group and others have provided evidence that sphingolipids (SLs) influence the antimycotic susceptibility of Candida species. We analyzed the molecular SL signatures of drug-resistant clinical isolates of Candida auris, which have emerged as a global threat over the last decade. This included Indian hospital isolates of C. auris, which were either resistant to fluconazole (FLCR) or amphotericin B (AmBR) or both drugs. Relative to Candida glabrata and Candida albicans strains, these C. auris isolates were susceptible to SL pathway inhibitors such as myriocin and aureobasidin A, suggesting that SL content may influence azole and AmB susceptibilities. Our analysis of SLs confirmed the presence of 140 SL species within nine major SL classes, namely the sphingoid bases, Cer, αOH-Cer, dhCer, PCer, αOH-PCer, αOH-GlcCer, GlcCer, and IPC. Other than for αOH-GlcCer, most of the SLs were found at higher concentrations in FLCR isolates as compared to the AmBR isolates. SLs were at intermediate levels in FLCR + AmBR isolates. The observed diversity of molecular species of SL classes based on fatty acyl composition was further reflected in their distinct specific imprint, suggesting their influence in drug resistance. Together, the presented data improves our understanding of the dynamics of SL structures, their synthesis, and link to the drug resistance in C. auris.
Candida auris isolates are susceptible to sphingolipid inhibitors myriocin and aureobasidin A.
The distribution of sphingolipid species is distinct among C. auris isolates resistant to different antifungals.
Phytoceramides are the most abundant class of sphingolipid.
Cer(d18:1/18:1) is the major of ceramide species in C. auris.
d19:2 glucosylceramide backbone is typically in abundance in AmB resistant C. auris isolates.
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