Abstract
The ability of human dendritic cells (DC) to uptake synthetic micro- and nanosized particles was assessed by flow cytometry and fluorescent microscopy. DCs were differentiated in vitro from blood monocytes in the presence of recombinant cytokines. Further maturation of DC in culture after the addition of maturation factors resulted in the increased expression of HLA-DR and co-stimulatory molecules CD80, CD83, CD86, in comparison with immature DC. Active internalization of Fluoresbrite-YG fluorescent microbeads (0.2 µm) was noted for immature but not mature DCs. The decrease of endocytic activity after DC maturation correlated with the reduced expression of CD209, the surface membrane receptor participating in phagocytosis. Unlike microparticles, the uptake of nanoscale Quantum dots-655 did not depend on the stage of DC maturation and probably was mediated by a different endocytosis mechanism.
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Abbreviations
- DC:
-
dendritic cells
- APC:
-
antigen-presenting cells
- MHC:
-
major histocompatibility complex
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Original Russian Text © P.A. Karalkin, A.Yu. Lupatov, K.N. Yarygin, 2009, published in Biologicheskie Membrany, 2009, Vol. 26, No. 5, pp. 394–400.
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Karalkin, P.A., Lupatov, A.Y. & Yarygin, K.N. Endocytosis of micro- and nanosized particles in vitro by human dendritic cells. Biochem. Moscow Suppl. Ser. A 3, 410–416 (2009). https://doi.org/10.1134/S1990747809040072
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DOI: https://doi.org/10.1134/S1990747809040072