Entrapment of cisplatin into biodegradable polyalkylcyanoacrylate nanoparticles.

The entrapment of cisplatin into biodegradable colloidal systems (polyalkylcyanoacrylates) was studied. Nanoparticles were characterized in terms of relevant parameters for organ distribution in vivo, such as particle diameter and particle size distribution, determined by correlation photon spectroscopy and transmission electron microscopy. Association efficiency was also evaluated by Plasma Emission Spectrophotometry. The ability of surfactants (sodium lauryl sulphate and poloxamer 188), and dextrans of various molecular weights, to improve the binding of the drug to polyalkylcyanoacrylates was also studied. The dextran content in nanoparticles, as determined by polarimetry, increases with the molecular weight of the polysaccharide. The highest value of association efficiency of cisplatin to nanoparticles was obtained in the presence of dextran 70 with sodium lauryl sulphate (0.08%) as stabiliser.