title: CapsMorph® technology for oral delivery--theory, preparation and characterization.
abstract: The CapsMorph(®) technology prepares amorphous drugs for oral delivery by encapsulating them into porous materials. Hesperidin as model compound was loaded onto AEROPERL(®) 300 Pharma using the wetness impregnation method. Hesperidin was dissolved in dimethyl sulfoxide (DMSO) and alternatively in DMSO with addition of Tween 80. The drug solutions were added dropwise to the porous material and subsequently DMSO was evaporated. The AEROPERL(®) 300 Pharma could be loaded with about 30% hesperidin in the amorphous form. Amorphous state was verified by X-ray diffraction and differential scanning calorimetry. The CapsMorph(®) formulation was compared regarding properties determining oral bioavailability, i.e., kinetic saturation solubility and dissolution rate to raw drug powder and hesperidin nanocrystals. The saturation solubility of CapsMorph(®) without Tween 80 was 654 μg/ml, which is 36-fold higher than the raw drug powder (18 μg/ml) and about 20 times higher than nanocrystals (30 μg/ml). In vitro release was faster (100% in 10 min at pH 6.8) compared to dissolution of nanocrystals with about 15%. Addition of Tween 80 to CapsMorph(®) lowered the solubility (168 μg/ml) and slowed down the release, but provided longer times of supersaturation without precipitation of drug. Based on these data, it appears that drug loaded porous materials provide better formulations compared to nanocrystals for poorly soluble drugs.
authors.affiliation: Institute of Pharmacy, Department of Pharmaceutics, Biopharmaceutics & NutriCosmetics, Freie Universität Berlin, Kelchstr. 31, 12169 Berlin, Germany.
authors.forename: Qionghua
authors.initials: Q
authors.lastname: Wei
authors.affiliation: Institute of Pharmacy, Department of Pharmaceutics, Biopharmaceutics & NutriCosmetics, Freie Universität Berlin, Kelchstr. 31, 12169 Berlin, Germany; Fachhochschule/University of Applied Sciences Kaiserslautern, Carl-Schurz-Str. 10-16, 66953 Pirmasens, Germany.
authors.forename: Cornelia M
authors.initials: CM
authors.lastname: Keck
authors.affiliation: Institute of Pharmacy, Department of Pharmaceutics, Biopharmaceutics & NutriCosmetics, Freie Universität Berlin, Kelchstr. 31, 12169 Berlin, Germany. Electronic address: nanoteam@gmx.com.
authors.forename: Rainer H
authors.initials: RH
authors.lastname: Müller
mesh_terms: D000284:Administration, Oral; D002626:Chemistry, Pharmaceutical; D004337:Drug Carriers / Q000008:administration & dosage* / Q000737:chemistry*; D006569:Hesperidin / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D011136:Polysorbates / Q000737:chemistry; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*; D012995:Solubility
chemical_list: D004337:Drug Carriers; D011136:Polysorbates; D012822:Silicon Dioxide; D006569:Hesperidin
keywords: AEROPERL(®) 300 Pharma; Amorphous; CapsMorph(®); Dimethyl sulfoxide (PubChem CID: 679); Hesperidin; Hesperidin (PubChem CID: 10621); Impregnation; Oral bioavailability; Poorly soluble drugs; Saturation solubility; Tween 80 (PubChem CID: 5281955)