A Correlative Imaging Study of in vivo and ex vivo Biodistribution of Solid Lipid Nanoparticles
| Autor: | Barbara Cisterna, Manuela Malatesta, Claudio Nastruzzi, Federico Boschi, Andrea Sbarbati, Laura Calderan, Paolo Bernardi, Enrica Cappellozza, Silvia Mannucci, Rita Cortesi, Elisabetta Esposito |
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| Rok vydání: | 2020 |
| Předmět: |
Biodistribution
Biocompatibility Chemistry Organic Chemistry Biophysics Pharmaceutical Science Bioengineering 02 engineering and technology General Medicine 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences In vitro 0104 chemical sciences Biomaterials In vivo Drug Discovery Solid lipid nanoparticle Fluorescence microscope Nanocarriers 0210 nano-technology Ex vivo |
| Zdroj: | International Journal of Nanomedicine. 15:1745-1758 |
| ISSN: | 1178-2013 |
| DOI: | 10.2147/ijn.s236968 |
| Popis: | Purpose Solid lipid nanoparticles are largely used in biomedical research and are characterized by high stability and biocompatibility and are also able to improve the stability of various loaded molecules. In vitro studies demonstrated that these nanoparticles are low cytotoxic, while in vivo studies proved their efficiency as nanocarriers for molecules characterized by a low bioavailability. However, to our knowledge, no data on the systemic biodistribution and organ accumulation of solid lipid nanoparticles in itself are presently available. Methods In this view, we investigated the solid lipid nanoparticles biodistribution by a multimodal imaging approach correlating in vivo and ex vivo analyses. We loaded solid lipid nanoparticles with two different fluorophores (cardiogreen and rhodamine) to observe them with an optical imager in the whole organism and in the excised organs, and with fluorescence microscopy in tissue sections. Light and transmission electron microscopy analyses were also performed to evaluate possible structural modification or damage due to nanoparticle administration. Results Solid lipid nanoparticles loaded with the two fluorochromes showed good optic characteristics and stable polydispersity. After in vivo administration, they were clearly detectable in the organism. Four hours after the injection, the fluorescent signal occurred in anatomical districts corresponding to the liver and this was confirmed by the ex vivo acquisitions of excised organs. Brightfield, fluorescence and transmission electron microscopy confirmed solid lipid nanoparticles accumulation in hepatocytes without structural damage. Conclusion Our results support the systemic biocompatibility of solid lipid nanoparticles and demonstrate their detailed biodistribution from the whole organism to organs until the cells. |
| Databáze: | OpenAIRE |
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