Arachidonic acid released from epithelial cells by Malassezia furfur phospholipase A2: A potential pathophysiologic mechanism

Lilian I. Plotkin, Irina Mathov, Luis Squiquera, Juliana Leoni

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

Malassezia furfur is a lipophilic yeast that has been related to inflammatory skin conditions such as seborrhoeic dermatitis and psoriasis. We have previously reported that this yeast secretes enzymes capable of metabolizing complex lipids. This lipolytic system is critical for M. furfur growth, since the yeast has a strict dependence on an exogenous source of fatty acids. In the present study we show that M. furfur can grow in cultures supplemented with either Hep-2 cell membranes or erythrocytes as the sole source of lipids. M. furfur secretes enzymes having phospholipase A2 activity, based upon the lysis of erythrocytes being inhibited by pretreatment with p-bromophenacyl-bromide. This enzyme liberates arachidonic acid from Hep-2 cells, as confirmed by High Performance Liquid Chromatography and High Performance Thin Layer Chromatography analysis. Arachidonic acid metabolites are well-known mediators of skin inflammation. Biopsies taken after topical inoculations of mice with M. furfur culture supernatant show evidence of an inflammatory response. As a result of our findings, we established that M. furfur can trigger an inflammatory response per se by releasing metabolic products.

Original languageEnglish (US)
Pages (from-to)163-169
Number of pages7
JournalMycologia
Volume90
Issue number2
DOIs
StatePublished - Jan 1 1998
Externally publishedYes

Keywords

  • Eicosanoids
  • Lipase
  • Skin inflammation
  • Yeast

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Physiology
  • Molecular Biology
  • Genetics
  • Cell Biology

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