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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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P-selectin and MAC-1 mediate monocyte rolling and adhesion to ECM-bound platelets under flow conditions.

Accumulation of monocyte-derived foam cells in focal areas of the atherosclerotic (A.S.-) lesion is one of the key events in early atherogenesis. Using a flow model for the damaged vessel wall, we examined the ability of ECM-bound platelets to induce monocyte tethering and adhesion. Whereas ECM-proteins alone induced monocyte adhesion only at low shear stresses (< 100 mPa), ECM-bound platelets induced monocyte rolling and adhesion at shear stresses up to 240 mPa. Studies with specific antibodies showed that monocyte adhesion to platelets was mainly mediated by P-selectin and monocyte PSGL-1 (maximum inhibition 90%). beta2-Integrin blocking CD18 and CD11b antibodies partly inhibited the arrest of rolling cells. Antibodies against other adhesion molecules such as LFA-1, PECAM-1, and beta1-integrins had no effect. Even sparsely adhered platelets (approximately 10% coverage of the surface) already strongly supported monocyte tethering. In conclusion, activated platelets present on ECM are a powerful adhesive substrate for monocyte recruitment under flow conditions.[1]

References

  1. P-selectin and MAC-1 mediate monocyte rolling and adhesion to ECM-bound platelets under flow conditions. Kuijper, P.H., Gallardo Torres, H.I., Houben, L.A., Lammers, J.W., Zwaginga, J.J., Koenderman, L. J. Leukoc. Biol. (1998) [Pubmed]
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