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Trends Immunol. 2001 Jun;22(6):337-42.

Siglecs, sialic acids and innate immunity.

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  • 1The Wellcome Trust Biocentre, School of Life Sciences, University of Dundee, DD1 5EH, Dundee, UK.


Siglecs are members of the Ig superfamily that bind to sialic acid (Sia) and are mainly expressed by cells of the hematopoietic system. Until three years ago, only four Siglecs were known, namely sialoadhesin, CD22, myelin-associated glycoprotein and CD33. Since then, a further six human CD33-related Siglecs with features of inhibitory receptors have been identified and shown to be expressed by discrete subsets of leukocytes. Recognition of Sia by these Siglecs could play a role in the regulation of the innate immune system.

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