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. 2001 Mar;80(3):1354–1358. doi: 10.1016/S0006-3495(01)76108-5

Ultraweak sugar-sugar interactions for transient cell adhesion.

F Pincet 1, T Le Bouar 1, Y Zhang 1, J Esnault 1, J M Mallet 1, E Perez 1, P Sinaÿ 1
PMCID: PMC1301327  PMID: 11222296

Abstract

Carbohydrate-carbohydrate interactions are rarely considered in biologically relevant situations such as cell recognition and adhesion. One Ca(2+)-mediated homotypic interaction between two Lewis(x) determinants (Le(x)) has been proposed to drive cell adhesion in murine embryogenesis. Here, we confirm the existence of this specific interaction by reporting the first direct quantitative measurements in an environment akin to that provided by membranes. The adhesion between giant vesicles functionalized with Le(x) was obtained by micropipette aspiration and contact angle measurements. This interaction is below the thermal energy, and cell-cell adhesion will require a large number of molecules, as illustrated by the Le(x) concentration peak observed at the cell membranes during the morula stage of the embryo. This adhesion is ultralow and therefore difficult to measure. Such small interactions explain why the concept of specific interactions between carbohydrates is often neglected.

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Selected References

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