Abstract
In this work, metal-organic frameworks on the basis of γ-cyclodextrin (γCD-MOF) were proposed as carriers for methotrexate (MTX) which is widely used as chemotherapy agent and immune system suppressant. The synthesized γCD-MOF was loaded with MTX by impregnation and co-crystallization. The obtained composites were characterized using powder X-ray diffraction, N2 adsorption/desorption, FTIR spectroscopy, solid-state 13C MAS CP/TOSS NMR and scanning electron microscopy. Pharmaceutically relevant properties of MTX alone and loaded in γCD-MOF were investigated in vitro and in vivo. The faster dissolution of MTX incorporated in γCD-MOF was demonstrated in blank buffers and biorelevant media (FaSSGF, FaSSIF) simulating the gastrointestinal fluids. Inclusion complex formation of MTX with γ-CD enhances the drug dissolution rate and, at the same time, slightly decreases the drug permeability through the lipophilic membrane. The in vivo experiments showed the improved pharmacokinetic parameters of MTX loaded in γCD-MOF.
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