Artículos de revistas
Computational and experimental approaches for development of methotrexate nanosuspensions by bottom-up nanoprecipitation
Fecha
2017-05-30Registro en:
International Journal of Pharmaceutics, v. 524, n. 1-2, p. 330-338, 2017.
1873-3476
0378-5173
10.1016/j.ijpharm.2017.03.068
2-s2.0-85017399633
2-s2.0-85017399633.pdf
9129780536724256
Autor
Universidade Estadual Paulista (Unesp)
Federal University of Alfenas-UNIFAL
Federal Institute of Mato Grosso-IFMT
Institute of Physical—University of Brasília-UnB
Institución
Resumen
Development of nanosuspensions offers a promising tool for formulations involving poorly water-soluble drugs. In this study, methotrexate (MTX) nanosuspensions were prepared using a bottom-up process based on acid-base neutralization reactions. Computational studies were performed to determine structural and electronic properties for isolated molecules and molecular clusters in order to evaluate the mechanism of MTX nanoparticle formation. Computational results indicated that the clusters in zwitterionic and cationic states presented larger dimensions and higher energies of interaction between MTX molecules, which favored aggregation. In contrast, the clusters in the anionic state exhibited lower energies of interaction, indicating aggregation was less likely to occur. Experimental results indicated that the higher the HCl proportion during drug precipitation, the greater the particle size, resulting in micrometric particles (2874–7308 nm) (cationic and zwitterionic forms). However, MTX nanoparticles ranging in size from 132 to 186 nm were formed using the lowest HCl proportion during drug precipitation (anionic form). In vitro release profiles indicated that the drug release rate from nanosuspension was increased (approximately 2.6 times) over that of the raw material. Overall, computational modeling and experimental analysis were complementary and assisted in the rational design of the nanosuspension based on acid-base reactions.