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Effect of cyclodextrins on the solubility and antimycotic activity of sertaconazole: experimental and computational studies. 2002

I Perdomo-López, and A I Rodríguez-Pérez, and J M Yzquierdo-Peiró, and A White, and E G Estrada, and T G Villa, and J J Torres-Labandeira
Departamento de Farmacia e Tecnoloxía Farmacéutica, Facultade de Farmacia, Universidade de Santiago de Compostela, Campus Sur, E-15782 Santiago de Compostela, Spain.

This study investigated the effects of the complexation of sertaconazole nitrate with different cyclodextrin (CD) derivatives (alpha-CD, beta-CD, gamma-CD, hydroxypropyl-beta-CD, and hydroxypropyl-gamma-CD) on the aqueous solubility and antimycotic activity of the drug. Phase solubility studies indicated that the solubility of sertaconazole in enzyme-free simulated gastric- and enzyme-free simulated enteric fluids was significantly increased in the presence of cyclodextrins. The observed order of solubility increasing effect was: gamma-CD > HPgamma-CD > HPbeta-CD > beta-CD > alpha-CD. Solid-state sertaconazole-cyclodextrin complexes were prepared by freeze drying, and characterized by X-ray powder difractometry, differential scanning calorimetry (DSC), and infrared spectroscopy (FTIR). Freeze-dried complexes showed markedly higher solubility than both physical mixtures and sertaconazole alone. The antimycotic activities of sertaconazole-cyclodextrin complexes in solution were evaluated by inhibition zone assays with Candida albicans. The activity ranking agrees with the solubility ranking observed for these complexes, with the gamma-CD-sertaconazole complex showing the strongest antimycotic activity. Finally, molecular modeling studies were carried out using the MM2 force field method, for complexes in vacuum and in water. This enable indentification of the preferred orientation of sertaconazole in the gamma-CD cavity and of the main structural features responsible for the enhancement of its solubility and antimycotic activity.

UI MeSH Term Description Entries
D007093 Imidazoles Compounds containing 1,3-diazole, a five membered aromatic ring containing two nitrogen atoms separated by one of the carbons. Chemically reduced ones include IMIDAZOLINES and IMIDAZOLIDINES. Distinguish from 1,2-diazole (PYRAZOLES).
D008958 Models, Molecular Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures. Molecular Models,Model, Molecular,Molecular Model
D002176 Candida albicans A unicellular budding fungus which is the principal pathogenic species causing CANDIDIASIS (moniliasis). Candida albicans var. stellatoidea,Candida stellatoidea,Dematium albicans,Monilia albicans,Myceloblastanon albicans,Mycotorula albicans,Parasaccharomyces albicans,Procandida albicans,Procandida stellatoidea,Saccharomyces albicans,Syringospora albicans
D003505 Cyclodextrins A homologous group of cyclic GLUCANS consisting of alpha-1,4 bound glucose units obtained by the action of cyclodextrin glucanotransferase on starch or similar substrates. The enzyme is produced by certain species of Bacillus. Cyclodextrins form inclusion complexes with a wide variety of substances. Cycloamylose,Cyclodextrin,Cyclodextrin Derivatives,Cyclomaltooligosaccharides,Derivatives, Cyclodextrin
D000935 Antifungal Agents Substances that destroy fungi by suppressing their ability to grow or reproduce. They differ from FUNGICIDES, INDUSTRIAL because they defend against fungi present in human or animal tissues. Anti-Fungal Agents,Antifungal Agent,Fungicides, Therapeutic,Antibiotics, Antifungal,Therapeutic Fungicides,Agent, Antifungal,Anti Fungal Agents,Antifungal Antibiotics
D012995 Solubility The ability of a substance to be dissolved, i.e. to form a solution with another substance. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed) Solubilities
D013876 Thiophenes A monocyclic heteroarene furan in which the oxygen atom is replaced by a sulfur. Thiophene

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