The Journal of Experimental Medicine
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Published online 28 April 2003 doi:10.1084/jem.20021890
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© Rockefeller University Press, 0022-1007/2003/5/1119 $5.00
The Journal of Experimental Medicine, Volume 197, Number 9, 1119-1124

Dectin-1 Mediates the Biological Effects of ß-Glucans

Gordon D. Brown1, Jurgen Herre1, David L. Williams2, Janet A. Willment1, Andrew S. J. Marshall1 and Siamon Gordon1

1 Sir William Dunn School of Pathology, Oxford OX1 3RE, United Kingdom
2 Department of Surgery, James H. Quillen College of Medicine, Johnson City, TN 37614

Address correspondence to Gordon D. Brown, Sir William Dunn School of Pathology, South Parks Road, Oxford OX1 3RE, United Kingdom. Phone: 44-1865-27-5522; Fax: 44-1865-27-5515; E-mail: gbrown{at}molbiol.ox.ac.uk

The ability of fungal-derived ß-glucan particles to induce leukocyte activation and the production of inflammatory mediators, such as tumor necrosis factor (TNF)-{alpha}, is a well characterized phenomenon. Although efforts have been made to understand how these carbohydrate polymers exert their immunomodulatory effects, the receptors involved in generating these responses are unknown. Here we show that Dectin-1 mediates the production of TNF-{alpha} in response to zymosan and live fungal pathogens, an activity that occurs at the cell surface and requires the cytoplasmic tail and immunoreceptor tyrosine activation motif of Dectin-1 as well as Toll-like receptor (TLR)-2 and Myd88. This is the first demonstration that the inflammatory response to pathogens requires recognition by a specific receptor in addition to the TLRs. Furthermore, these studies implicate Dectin-1 in the production of TNF-{alpha} in response to fungi, a critical step required for the successful control of these pathogens.

Key Words: ß-glucan receptor • macrophages • inflammation • tumor necrosis factor • Candida


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