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Research Article Free access | 10.1172/JCI119092

DNA aptamers block L-selectin function in vivo. Inhibition of human lymphocyte trafficking in SCID mice.

B J Hicke, S R Watson, A Koenig, C K Lynott, R F Bargatze, Y F Chang, S Ringquist, L Moon-McDermott, S Jennings, T Fitzwater, H L Han, N Varki, I Albinana, M C Willis, A Varki, and D Parma

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Published December 15, 1996 - More info

Published in Volume 98, Issue 12 on December 15, 1996
J Clin Invest. 1996;98(12):2688–2692. https://doi.org/10.1172/JCI119092.
© 1996 The American Society for Clinical Investigation
Published December 15, 1996 - Version history
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Abstract

Selectins participate in the initial events leading to leukocyte extravasation from the blood into tissues. Thus the selectins have generated much interest as targets for antiinflammatory agents. Therapeutic molecules based on the monomeric carbohydrate ligand sialyl Lewis X (SLe(X)) have low affinities and are not specific for a given selectin. Using SELEX (Systematic Evolution of Ligands by EXponential Enrichment) technology, we have generated aptamers specific for L-selectin that require divalent cations for binding and have low nanomolar affinity. In vitro, the deoxyoligonucleotides inhibit L-selectin binding to immobilized SLe(X) in static assays and inhibit L-selectin-mediated rolling of human lymphocytes and neutrophils on cytokine-activated endothelial cells in flow-based assays. These aptamers also block L-selectin-dependent lymphocyte trafficking in vivo, indicating their potential utility as therapeutics.

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