Kinetic analysis of nanoparticulate polyelectrolyte complex interactions with endothelial cells.

Hartig SM, Greene RR, Carlesso G, Higginbotham JN, Khan WN, Prokop A, Davidson JM
Biomaterials. 2007 28 (26): 3843-55

PMID: 17560645 · PMCID: PMC2000344 · DOI:10.1016/j.biomaterials.2007.04.027

A non-toxic, nanoparticulate polyelectrolyte complex (PEC) drug delivery system was formulated to maintain suitable physicochemical properties at physiological pH. Toxicity, binding, and internalization were evaluated in relevant microvascular endothelial cells. PEC were non-toxic, as indicated by cell proliferation studies and propidium iodide staining. Inhibitor studies revealed that PEC were bound, in part, via heparan sulfate proteoglycans and internalized through macropinocytosis. A novel, flow cytometric, Scatchard protocol was established and showed that PEC, in the absence of surface modification, bind cells non-specifically with positive cooperativity, as seen by graphical transformations.

MeSH Terms (10)

Cell Line Cell Proliferation Cell Survival Drug Carriers Electrolytes Endothelial Cells Humans Kinetics Metabolic Clearance Rate Nanoparticles

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