Ponente
Descripción
Conjugation of iron oxide nanoparticles (IONPs) to drugs and antibodies increases contrast during Magnetic Resonance Imaging (MRI). Some IONPs are approved by the Food and Drug Administration for use in vivo as MRI contrast agents. The Cuban Neuroscience Center has a family of compounds derived from naphthalene, called Amylovis®, to be used in the diagnosis and treatment of Alzheimer's disease. In this work, IONPs with different coatings conjugated with Amylovis® derivatives were synthesized for their potential use as contrast agents to obtain MRI. The coprecipitation method was used to obtain the magnetic nuclei and two methodologies were performed to coat the IONPs (post-synthesis or in situ). The different coatings used were: polyacrylic acid, gallic acid, sodium citrate, PEG-diCOOH600 and APTES. The carbodiimide method was used as the synthetic protocol to conjugate the Amylovis® derivative to the different coatings. The presence of the different coatings was verified by means of signals corresponding to the functional groups present in them with the use of FT-IR. The saturation magnetization values and the magnetic behavior of the Amylovis-2®-conjugated nanoparticles were determined by VSM. The DLS profiles made it possible to identify the systems with the smallest hydrodynamic diameter and taking into account the Pot ζ values and the sedimentation study using UV-Vis spectroscopy, it was possible to select the most stable systems over time.
