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Histidine-rich glycoprotein protects from systemic Candida infection
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2008 (English)In: PLoS pathogens, ISSN 1553-7374, Vol. 4, no 8, e1000116- p.Article in journal (Refereed) Published
Abstract [en]

Fungi, such as Candida spp., are commonly found on the skin and at mucosal surfaces. Yet, they rarely cause invasive infections in immunocompetent individuals, an observation reflecting the ability of our innate immune system to control potentially invasive microbes found at biological boundaries. Antimicrobial proteins and peptides are becoming increasingly recognized as important effectors of innate immunity. This is illustrated further by the present investigation, demonstrating a novel antifungal role of histidine-rich glycoprotein (HRG), an abundant and multimodular plasma protein. HRG bound to Candida cells, and induced breaks in the cell walls of the organisms. Correspondingly, HRG preferentially lysed ergosterol-containing liposomes but not cholesterol-containing ones, indicating a specificity for fungal versus other types of eukaryotic membranes. Both antifungal and membrane-rupturing activities of HRG were enhanced at low pH, and mapped to the histidine-rich region of the protein. Ex vivo, HRG-containing plasma as well as fibrin clots exerted antifungal effects. In vivo, Hrg(-/-) mice were susceptible to infection by C. albicans, in contrast to wild-type mice, which were highly resistant to infection. The results demonstrate a key and previously unknown antifungal role of HRG in innate immunity.

Place, publisher, year, edition, pages
2008. Vol. 4, no 8, e1000116- p.
National Category
Medical and Health Sciences
URN: urn:nbn:se:uu:diva-98935DOI: 10.1371/journal.ppat.1000116ISI: 000259783100004PubMedID: 18797515OAI: oai:DiVA.org:uu-98935DiVA: diva2:201673
Available from: 2009-03-05 Created: 2009-03-05 Last updated: 2013-04-11Bibliographically approved

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Olsson, Anna-Karin
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Department of Medical Biochemistry and MicrobiologyDepartment of Pharmacy
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