Formulation, Colloidal Characterization, and In Vitro Biological Effect of BMP-2 Loaded PLGA Nanoparticles for Bone Regeneration
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AuthorCastillo Santaella, Teresa del; Ortega-Oller, Inmaculada; Padial-Molina, Miguel; O'Valle Ravassa, Francisco Javier; Galindo Moreno, Pablo Antonio; Jódar Reyes, Ana Belén; Peula-García, José Manuel
BMP-2PLGA nanoparticlesPluronic F68
del Castillo-Santaella, T.; Ortega-Oller, I.; Padial-Molina, M.; O’Valle, F.; Galindo-Moreno, P.; Jódar-Reyes, A.B.; Peula-García, J.M. Formulation, Colloidal Characterization, and In Vitro Biological Effect of BMP-2 Loaded PLGA Nanoparticles for Bone Regeneration. Pharmaceutics 2019, 11, 388. [doi:10.3390/pharmaceutics11080388]
SponsorshipThis research was funded by the Consejería de Economía, Innovación, Ciencia y Empleo de la Junta de Andalucía (Spain) through research groups FQM-115 and CTS-1028, by the following research project: MAT2013-43922-R—European FEDER support included—(MICINN, Spain) and by MIS Ibérica S.L.
Nanoparticles (NPs) based on the polymer poly (lactide-co-glycolide) acid (PLGA) have been widely studied in developing delivery systems for drugs and therapeutic biomolecules, due to the biocompatible and biodegradable properties of the PLGA. In this work, a synthesis method for bone morphogenetic protein (BMP-2)-loaded PLGA NPs was developed and optimized, in order to carry out and control the release of BMP-2, based on the double-emulsion (water/oil/water, W/O/W) solvent evaporation technique. The polymeric surfactant Pluronic F68 was used in the synthesis procedure, as it is known to have an effect on the reduction of the size of the NPs, the enhancement of their stability, and the protection of the encapsulated biomolecule. Spherical solid polymeric NPs were synthesized, showing a reproducible multimodal size distribution, with diameters between 100 and 500 nm. This size range appears to allow the protein to act on the cell surface and at the cytoplasm level. The effect of carrying BMP-2 co-adsorbed with bovine serum albumin on the NP surface was analyzed. The colloidal properties of these systems (morphology by SEM, hydrodynamic size, electrophoretic mobility, temporal stability, protein encapsulation, and short-term release profile) were studied. The effect of both BMP2-loaded NPs on the proliferation, migration, and osteogenic differentiation of mesenchymal stromal cells from human alveolar bone (ABSC) was also analyzed in vitro.