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Title: Extracellular vesicles from Paracoccidioides pathogenic species transport polysaccharide and expose ligands for DC-SIGN receptors

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep14213· OSTI ID:1324971
 [1];  [2];  [2];  [2];  [3];  [1];  [3];  [4];  [1]
  1. Escola Paulista de Medicina-Univ. Federal de Sao Paulo, Sao Paulo (Brazil)
  2. Univ. of Georgia, Athens, GA (United States)
  3. National Centre for Biomedical Engineering Science, NUI Galway (Ireland)
  4. National Centre for Biomedical Engineering Science, NUI Galway (Ireland); National Univ. of Ireland, Galway (Ireland)

Extracellular vesicles (EVs) mediate non-conventional transport of molecules across the fungal cell wall. We aimed at describing the carbohydrate composition and surface carbohydrate epitopes of EVs isolated from the pathogenic fungi Paracoccidioides brasiliensis and P. lutzii using standard procedures. Total EV carbohydrates were ethanol-precipitated from preparations depleted of lipids and proteins, then analyzed by chemical degradation, gas chromatography-mass spectrometry, nuclear magnetic resonance and size-exclusion chromatography. EV glycosyl residues of Glc, Man, and Gal comprised most probably two major components: a high molecular mass 4,6-α-glucan and a galactofuranosylmannan, possibly an oligomer, bearing a 2-α-Manp main chain linked to β-Galf (1,3) and α-Manp (1,6) end units. The results also suggested the presence of small amounts of a (1→6)- Manp polymer, (1→3)-glucan and (1→6)-glucan. Glycan microarrays allowed identification of EV surface lectin(s), while plant lectin microarray profiling revealed terminal Man and GlcNAc residues exposed at the EVs surface. Mammalian lectin microarray profiling showed that DC-SIGN receptors recognized surface carbohydrate in Paracoccidioides EVs. Our results suggest that oligosaccharides, cytoplasmic storage, and cell wall polysaccharides can be exported in fungal EVs, which also expose surface PAMPs and lectins. As a result, the role of these newly identified components in the interaction with the host remains to be unraveled.

Research Organization:
Univ. of Georgia, Athens, GA (United States). Analytical Services & Training Lab. Complex Carbohydrate Research Center
Sponsoring Organization:
USDOE
Grant/Contract Number:
FG02-93ER20097
OSTI ID:
1324971
Journal Information:
Scientific Reports, Vol. 5; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 49 works
Citation information provided by
Web of Science

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Anti-Immune Strategies of Pathogenic Fungi journal November 2016
Pathogen-Derived Extracellular Vesicle-Associated Molecules That Affect the Host Immune System: An Overview journal September 2018
REG3β modifies cell tumor function by impairing extracellular vesicle uptake journal June 2017
Fungal Extracellular Vesicles as Potential Targets for Immune Interventions journal October 2019
Assessing Bacterial Interactions Using Carbohydrate-Based Microarrays journal December 2015
Down-regulation of TUFM impairs host cell interaction and virulence by Paracoccidioides brasiliensis journal November 2019
Extracellular vesicles secreted by Saccharomyces cerevisiae are involved in cell wall remodelling journal August 2019
A Novel Protocol for the Isolation of Fungal Extracellular Vesicles Reveals the Participation of a Putative Scramblase in Polysaccharide Export and Capsule Construction in Cryptococcus gattii journal March 2019
Comparison of the RNA Content of Extracellular Vesicles Derived from Paracoccidioides brasiliensis and Paracoccidioides lutzii journal July 2019
Extracellular Vesicles in Fungi: Composition and Functions book January 2018
Synthesis of oligosaccharides related to galactomannans from Aspergillus fumigatus and their NMR spectral data journal January 2018
Evaluation of (1 → 3)‐β‐D‐glucan assay for diagnosing paracoccidioidomycosis journal November 2019
Extracellular Vesicles from the Protozoa Acanthamoeba castellanii: Their Role in Pathogenesis, Environmental Adaptation and Potential Applications journal February 2019
Extracellular Vesicle-Associated Transitory Cell Wall Components and Their Impact on the Interaction of Fungi with Host Cells journal July 2016
Potential Roles of Fungal Extracellular Vesicles during Infection journal June 2016
DC-SIGN and VDR polymorphisms are associated with chronic form of paracoccidioidomycosis with oral manifestations journal November 2018
Extracellular vesicles from Paracoccidioides brasiliensis induced M1 polarization in vitro journal October 2016
Biotoxic Effect of Chromium (VI) on Plant Growth-Promoting Traits of Novel Cellulosimicrobium funkei Strain AR8 Isolated from Phaseolus vulgaris Rhizosphere journal October 2016