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Impact of polysialylated CD56 on natural killer cell cytotoxicity

Moebius, J. M., Widera, D., Schmitz, J., Kaltschmidt, C. and Piechaczek, C. (2007) Impact of polysialylated CD56 on natural killer cell cytotoxicity. BMC immunology, 8 (1). 13. ISSN 1471-2172

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To link to this item DOI: 10.1186/1471-2172-8-13

Abstract/Summary

Background Siglec-7, a sialic acid binding inhibitory receptor expressed by NK cells is masked in vivo by a so far unknown ligand. It shows a strong binding prevalence for α-2,8-linked disialic acids in vitro. Results Here we describe the expression of PSA-NCAM (α-2,8-linked polysialic acid modified NCAM) on functional adult peripheral blood natural killer cells and examine its possible role in masking Siglec-7. Unmasking of Siglec-7 using Clostridium perfringens neuraminidase massively reduces NK cell cytotoxicity. By contrast a specific removal of PSA using Endo-NF does not lead to a reduction of NK cell cytotoxicity. Conclusion The results presented here therefore indicate that PSA-NCAM is not involved in masking Siglec-7.

Item Type:Article
Refereed:Yes
Divisions:No Reading authors. Back catalogue items
Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > School of Pharmacy > Division of Pharmacology
ID Code:39500
Publisher:BioMed Central

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