RESUMEN
Interactions of two fluorescent probes 1-(trimethylammoniumphenyl)-6-phenyl-1,3,5 hexatriene p-toluenesulfonate (TMA-DPH) and 12-(9-anthroyloxy) stearic acid (12-AS) with polyamidoamine (PAMAM) dendrimers were studied. Changes in fluorescence intensity and steady-state fluorescence anisotropy of TMA-DPH and 12-AS were monitored. It was found that 12-AS molecules incorporated into dendrimer cavities whereas TMA-DPH molecules aggregated on the surface of polymer. Dendrimer size had not significant impact on its host properties.
Asunto(s)
Materiales Biocompatibles/química , Difenilhexatrieno/análogos & derivados , Difenilhexatrieno/química , Colorantes Fluorescentes/química , Poliaminas/química , Espectrometría de Fluorescencia/métodos , Ácidos Esteáricos/química , Adsorción , Difenilhexatrieno/análisis , Sustancias Macromoleculares , Conformación Molecular , Polímeros/química , Ácidos Esteáricos/análisisRESUMEN
Polyamidoamine (PAMAM) dendrimers with different concentrations (1 nM-1 mM) (generations 2, 3, and 4) impact on human red blood cell morphology, and membrane integrity is studied. Erythrocyte shape changes from biconcave to echinocytic in dendrimers. Cell aggregation occurs. Polymers cause also concentration- and generation-dependent haemolysis.