Morphological Analysis of Reticuloendothelial System in Capuchin Monkeys (Sapajus spp.) after Meso-2,3-Dimercaptosuccinic Acid (DMSA) Coated Magnetic Nanoparticles Administration

• Published in: PloS one 2015-11, Vol.10 (11), p.e0140233-e0140233
• Main Authors: Vasconcelos Braz, Shélida, Monge-Fuentes, Victoria, Rodrigues da Silva, Jaqueline, Tomaz, Carlos, Tavares, Maria Clotilde, Pereira Garcia, Monica, Nair Báo, Sônia, Paulino Lozzi, Silene, Bentes de Azevedo, Ricardo
• Format: Article
• Language: English
• Subjects: 2,3-Dimercaptosuccinic acid; Acids; Animals; Biocompatibility; Biology; Cebus; Coating; Coatings; Diagnostic systems; Dimercaptosuccinic acid; Drug metabolism; Electron microscopy; Gene expression; Genetic aspects; Genetics; Health aspects; Immune response; Laboratory animals; Life assessment; Liver; Liver - anatomy & histology; Liver - ultrastructure; Lymph nodes; Lymph Nodes - anatomy & histology; Lymph Nodes - ultrastructure; Lymphatic system; Magnetic materials; Magnetics; meso-2,3-dimercaptosuccinic acid; Microscopy, Electron, Transmission; Mitochondria; Mitochondria, Liver; Monkeys; Mononuclear Phagocyte System - anatomy & histology; Mononuclear Phagocyte System - ultrastructure; Morphology; Nanoparticles; Neurosciences; NMR; Nuclear magnetic resonance; Organs; Particle size; Phagocytes; Physiology; Reticuloendothelial system; Spleen; Spleen - anatomy & histology; Spleen - ultrastructure; Succimer - administration & dosage; Transmission electron microscopy
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0140233

Magnetic nanoparticles can be used for numerous in vitro and in vivo applications. However, since uptake by the reticuloendothelial system represents an obstacle for the achievement of nanoparticle diagnostic and therapeutic goals, the aim of the present study was to evaluate the uptake of dimercaptosuccinic acid coated magnetic nanoparticles by reticuloendothelial system phagocytic cells present in lymph nodes, spleen, and liver tissue and how the presence of these particles could have an impact on the morphology of these organs in capuchin monkeys (Sapajus spp.). Animals were intravenously injected with dimercaptosuccinic acid coated magnetic nanoparticles and euthanized 12 hours and 90 days post-injection. Organs were processed by transmission electron microscopy and histological techniques. Samples of spleen and lymph nodes showed no morphological changes. Nevertheless, liver samples collected 90 days post-administration showed slight morphological alteration in space of Disse. Moreover, morphometrical analysis of hepatic mitochondria was performed, suggesting a clear positive correlation between mitochondrial area and dimercaptosuccinic acid coated magnetic nanoparticles administration time. The present results are directly relevant to current safety considerations in clinical diagnostic and therapeutic uses of magnetic nanoparticles.