RT info:eu-repo/semantics/article
T1 Complexation of the interferon inducer, bropirimine, with hydroxypropyl-ß-cyclodextrin
A1 Echezarreta López, María Magdalena
A1 Torres-Labandeira, J.J.
A1 Castineiras-Seijo, L.
A1 Santana-Penín, L.
A1 Vila-Jato, J.L.
A2 Ingeniería Química y Tecnología Farmacéutica
K1 Bropirimine
K1 Cyclodextrin complexation
K1 Hydroxypropyl-b-cyclodextrin
K1 Inclusion complex
K1 Characterization
K1 Solubility
AB Bropirimine (ABPP) is an orally active immunomodulator that increases endogenous alpha-interferon and other cytokines used clinically against carcinoma in situ of the bladder. The oral absorption of ABPP is poor because its low solubility in water. The purpose of this study is to develop a technological procedure useful to increase the water solubility of ABPP. To this end, the interaction of ABPP with several cyclodextrin derivatives-a-, b-, g- and hydroxypropyl-b-cyclodextrin with a degree of substitution 2.7 (HPbCD) was studied and the effect of the complexation process on the water solubility of the drug was evaluated. The best results were obtained with the hydroxypropyl derivative, HPbCD, that interacts in a 1:1 drug:cyclodextrin molar ratio. The inclusion complex ABPP–HPbCD was 1 characterized in solution by nuclear magnetic resonance ( H-NMR). The solid inclusion complex was obtained by freeze-drying and characterized by differential scanning calorimetry (DSC), X-ray diffractometry and mass spectrometry. The dissolution rate of ABPP from the HPbCD solid inclusion complex was increased compared to the powdered drug but not differences were found between the complex and a physical mixture with a similar molar ratio. The increase of the dissolution rate of the drug can be attributed to the breakdown in solution of the drug dimers in the presence of the cyclodextrin and to the complex formation.
YR 2000
FD 2000
LK http://riull.ull.es/xmlui/handle/915/37310
UL http://riull.ull.es/xmlui/handle/915/37310
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NO Financiado por Xunta de Galicia (project PGIDT99-PXI20305B)
DS Repositorio institucional de la Universidad de La Laguna
RD 18-nov-2024