FIGURE 5. Loss of Rap1a affects macrophage haptotaxis, adhesion and phagocytosis.
A. Adhesion of wild-type and Rap1a−/− macrophages to the (α4β1 integrin binding) fibronectin H296 peptide or vitronectin-coated cell culture wells was determined 90 min post plating following fixing and staining of adherent cells.
B. Haptotaxis of wild-type and Rap1a−/− macrophages through fibronectin H296 peptide-coated Transwell filters was measured at indicated time points.
C. Phagocytosis of IgG-coated sheep red blood cells by bone marrow-derived macrophages was measured at the indicated time points after exposure.
D. Phagocytosis of C3bi-opsonized sheep RBCs by macrophages was measured 30 min after exposure.
All data are mean +/− SD for cells derived from 3 mice/genotype and are representative of at least 4 independent experiments (2 experiments using a total of 4 mice were pooled for 5D).