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Usage Information

Memory B lymphocytes from secondary lymphoid organs interact with E-selectin through a novel glycoprotein ligand
María C. Montoya, … , Dietmar Vestweber, Manuel O. de Landázuri
María C. Montoya, … , Dietmar Vestweber, Manuel O. de Landázuri
Published May 1, 1999
Citation Information: J Clin Invest. 1999;103(9):1317-1327. https://doi.org/10.1172/JCI4705.
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Article

Memory B lymphocytes from secondary lymphoid organs interact with E-selectin through a novel glycoprotein ligand

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Abstract

Recirculation of B lymphocytes through the secondary lymphoid organs is key for recognition and response to foreign antigen. B lymphocytes within secondary lymphoid organs comprise a heterogeneous population of cells at distinct differentiation stages. To ascribe a particular adhesive behavior to discrete B-cell subsets within secondary lymphoid organs, we investigated their functional interaction with endothelial selectins under flow. We describe herein the characterization of a subset of human tonsillar B cells that interact with E-selectin but not P-selectin. E-selectin–interacting B cells had a phenotype of non–germinal center (CD10–, CD38–, CD44+), memory (IgD–) cells. Furthermore, FucT-VII was expressed selectively in CD44+ E-selectin–adherent B lymphocytes. B-cell rolling on E-selectin required sialic acid but was independent of previously described selectin ligands. A novel glycoprotein ligand of 240 kDa carrying N-linked glycans was isolated from B-cell membranes by an E-selectin immunoadhesin. Binding of this protein was strictly Ca2+ dependent, was inhibited by a cell adhesion–blocking mAb against E-selectin, and required the presence of sialic acid but not N-linked carbohydrates. Our results enable us to assign to resident memory B lymphocytes a novel adhesion function, the rolling on E-selectin, that provides insights on the adhesion pathways involved in homing of memory B cells to tertiary sites.

Authors

María C. Montoya, Karin Holtmann, Karen R. Snapp, Eric Borges, Francisco Sánchez-Madrid, Francis W. Luscinskas, Geoffrey Kansas, Dietmar Vestweber, Manuel O. de Landázuri

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