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dc.contributor.authorFiel, Luana Almeidapt_BR
dc.contributor.authorContri, Renata Vidorpt_BR
dc.contributor.authorBica, Juliane Freitaspt_BR
dc.contributor.authorFigueiró, Fabríciopt_BR
dc.contributor.authorBattastini, Ana Maria Oliveirapt_BR
dc.contributor.authorGuterres, Silvia Stanisçuaskipt_BR
dc.contributor.authorPohlmann, Adriana Raffinpt_BR
dc.date.accessioned2015-02-14T02:19:07Zpt_BR
dc.date.issued2014pt_BR
dc.identifier.issn1556-276Xpt_BR
dc.identifier.urihttp://hdl.handle.net/10183/110153pt_BR
dc.description.abstractThe synthesis of novel fluorescent materials represents a very important step to obtain labeled nanoformulations in order to evaluate their biological behavior. The strategy of conjugating a fluorescent dye with triacylglycerol allows that either particles differing regarding supramolecular structure, i.e., nanoemulsions, nanocapsules, lipid-core nanocapsules, or surface charge, i.e., cationic nanocapsules and anionic nanocapsules, can be tracked using the same labeled material. In this way, a rhodamine B-conjugated triglyceride was obtained to prepare fluorescent polymeric nanocapsules. Different formulations were obtained, nanocapsules (NC) or lipid-core nanocapsules (LNC), using the labeled oil and Eudragit RS100, Eudragit S100, or poly(caprolactone) (PCL), respectively. The rhodamine B was coupled with the ricinolein by activating the carboxylic function using a carbodiimide derivative. Thin layer chromatography, proton nuclear magnetic resonance (¹H-NMR), Fourier transform infrared spectroscopy (FTIR), UV-vis, and fluorescence spectroscopy were used to identify the new product. Fluorescent nanocapsule aqueous suspensions were prepared by the solvent displacement method. Their pH values were 4.6 (NC-RS100), 3.5 (NC-S100), and 5.0 (LNC-PCL). The volume-weighted mean diameter (D₄.₃) and polydispersity values were 150 nm and 1.05 (NC-RS100), 350 nm and 2.28 (NC-S100), and 270 nm and 1.67 (LNC-PCL). The mean diameters determined by photon correlation spectroscopy (PCS) (z-average) were around 200 nm. The zeta potential values were +5.85 mV (NC-RS100), −21.12 mV (NC-S100), and −19.25 mV (LNC-PCL). The wavelengths of maximum fluorescence emission were 567 nm (NC-RS100 and LNC-PCL) and 574 nm (NC-S100). Fluorescence microscopy was used to evaluate the cell uptake (human macrophage cell line) of the fluorescent nanocapsules in order to show the applicability of the approach. When the cells were treated with the fluorescent nanocapsules, red emission was detected around the cell nucleus. We demonstrated that the rhodamine B-conjugated triglyceride is a promising new material to obtain versatile dye-labeled nanocarriers presenting different chemical nature in their surfaces.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofNanoscale Research Letters. New York. Vol. 9 (May 2014), 11 p.pt_BR
dc.rightsOpen Accessen
dc.subjectFluorescent triglycerideen
dc.subjectNanocápsulaspt_BR
dc.subjectFluorescent polymeric nanocapsulesen
dc.subjectLipid-core nanocapsulesen
dc.subjectFluorescenceen
dc.subjectCell uptakeen
dc.titleLabeling the oily core of nanocapsules and lipid-core nanocapsules with a triglyceride conjugated to a fluorescent dye as a strategy to particle tracking in biological studiespt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000920761pt_BR
dc.type.originEstrangeiropt_BR


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