Long-term toxicological effects of persistent luminescence nanoparticles after intravenous injection in mice

Publication date: 5 November 2017 Source:International Journal of Pharmaceutics, Volume 532, Issue 2 Author(s): Gonzalo Ramírez-García, Silvia Gutiérrez-Granados, Marco A. Gallegos-Corona, Lourdes Palma-Tirado, Fanny d’Orlyé, Anne Varenne, Nathalie Mignet, Cyrille Richard, Minerva Martínez-Alfaro The ZnGa1.995Cr0.005O4 persistent luminescence nanoparticles offer the promise of revolutionary tools for biological imaging with applications such as cell tracking or tumor detection. They can be re-excited through living tissues by visible photons, allowing observations without any time constraints and avoiding the undesirable auto-fluorescence signals observed when fluorescent probes are used. Despite all these advantages, their uses demand extensive toxicological evaluation and control. With this purpose, mice were injected with a single intravenous administration of hydroxylated or PEGylated persistent luminescence nanoparticles at different concentrations and then a set of standard tests were carried out 1day, 1 month and 6 months after the administration. High concentrations of hydroxylated nanoparticles generate structural alterations at histology level, endoplasmic reticulum damage and oxidative stress in liver, as well as rising in white blood cells counts. A mechanism involving the endoplasmic reticulum damage could be the responsible of the observed injuries in case of ZGO-OH. On the contrary, no toxicological effects related to PEGylated nanoprobes trea...
Source: International Journal of Pharmaceutics - Category: Drugs & Pharmacology Source Type: research