The fungus Candida albicans can cause a wide classification of infections, ranging from mucosal infections in unspecifically healthy individuals to sentience-threatening infections in persons with impaired immunity. Beating this infection requires mononuclear immune cells such as neutrophils and macrophages to endorse the fungus, ingest it, and kill it by releasing proinflammatory cytokines that activate the immune response. In a turn over appearing online on May 18 in advance of print flyer in the June uncertain of the Journal of Clinical Investigation, Mihai Netea and colleagues from Radboud University Nijmegen Medical Center, The Netherlands, show how mononuclear cells salute the cell surface of C. albicans. They reveal that this handle involves multiple perception systems that distinguish various components within the layers of the fungal cell wall.

The authors examined mutant strains of C. albicans that had specified defects in the mannosylation of chamber lose everything proteins. They demonstrated that 3 components of the fungal stall wall are involved in the recognition by monocytes/macrophages and fit the resulting activation of proinflammatory cytokine release: (i) N-linked mannans; (ii) O-linked mannans; and (iii) beta-glucans. The N-linked and O-linked mannosyl groups of glycoproteins of the outer emerge of the cell protection were to blame for most of the cytokine-stimulating activity of the fungal cubicle. This was achieved by clear-cut interaction of the N-linked mannosyl residues with the mannose receptor, and of the O-linked mannosyl residues with Fee-like receptor 4. Residual cytokine stage was mediated by beta-glucans interacting with a protein called dectin-1, and most plausible in cooperation with Toll-like receptor 2. This study whim serve as a model for time to come studies of how the immune system recognizes other microorganisms.

TITLE: Safe sensing of Candida albicans requires cooperative recognition of mannans and glucans by lectin and Toll-like receptors

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Brooke Grindlinger
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Yearbook of Clinical Investigation
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