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- W2024111238 abstract "Integrin alpha(D)beta(2) (CD11d/CD18) is a multiligand macrophage receptor with recognition specificity identical to that of the major myeloid cell-specific integrin alpha(M)beta(2) (CD11b/CD18, Mac-1). Despite its prominent upregulation on inflammatory macrophages, the role of alpha(D)beta(2) in monocyte and macrophage migration is unknown. In this study, we have generated model and natural cell lines expressing different densities of alpha(D)beta(2) and examined their migration to various extracellular matrix proteins. When expressed at a low density, alpha(D)beta(2) on the surface of recombinant HEK293 cells and murine IC-21 macrophages cooperates with beta(1)/beta(3) integrins to support cell migration. However, its increased expression on the alpha(D)beta(2)-expressing HEK293 cells and its upregulation by PMA on the IC-21 macrophages result in increased cell adhesiveness and inhibition of cell migration. Furthermore, ligation of alpha(D)beta(2) with anti-alpha(D) blocking antibodies restores beta(1)/beta(3)-driven cell migration by removing the excess alpha(D)beta(2)-mediated adhesive bonds. Consistent with in vitro data, increased numbers of inflammatory macrophages were recovered from the inflamed peritoneum of mice after the administration of anti-alpha(D) antibody. These results demonstrate that the density of alpha(D)beta(2) is critically involved in modulating macrophage adhesiveness and their migration, and suggest that low levels of alpha(D)beta(2) contribute to monocyte migration while alpha(D)beta(2) upregulation on differentiated macrophages may facilitate their retention at sites of inflammation." @default.
- W2024111238 created "2016-06-24" @default.
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- W2024111238 date "2008-08-01" @default.
- W2024111238 modified "2023-09-27" @default.
- W2024111238 title "The role of integrin αDβ2 (CD11d/CD18) in monocyte/macrophage migration" @default.
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- W2024111238 doi "https://doi.org/10.1016/j.yexcr.2008.05.016" @default.
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