betadex and ferulic-acid

An inclusion system of embedding ferulic acid into β-cyclodextrin (FACD) with different host-guest stoichiometries was prepared by a co-precipitation method. Then, the physicochemical properties and release kinetics of the FACD were evaluated. The results of thermal analysis, X-ray diffraction, scanning electron microscopy, and Fourier transform infrared spectroscopy (FTIR) proved the successful embedding of FA into the β-cyclodextrin matrix. Four mathematical models were applied to adjust the ferulic acid release profile and identify preferential kinetics. The results of physicochemical properties confirmed the successful formation of the complexes. The loading capacity (LC) and encapsulation efficiency (EE) of the inclusion complex (1 : 0.5) were 41.0 ± 3.28 mg g

Topics: beta-Cyclodextrins; Calorimetry, Differential Scanning; Chemistry, Physical; Coumaric Acids; Food Preservation; Humans; Microscopy, Electron, Scanning; Spectroscopy, Fourier Transform Infrared; X-Ray Diffraction

In this study, ferulic acid (FA) was covalently bound to one of the primary hydroxyls of β-cyclodextrin (β-CD) via an ester linkage to improve its stability and biological activity. Experiments using UV, FTIR, FS, NMR, MS and FE-SEM were performed to characterize the structure of the FA-β-CD conjugate. Physicochemical properties such as solubility, crystallinity, thermal stability and photo-stability of the conjugate were also investigated, and the results revealed that the conjugate was in an amorphous form with improved thermal stability and photostability compared with the FA/β-CD inclusion complex. Furthermore, in vitro cytotoxicity of the FA-β-CD conjugate against HepG2 cell was enhanced with effective growth inhibition. Taken together, the present study indicates that the FA-β-CD conjugate might be a novel and potential functional composition for application in food and medicine.

Topics: Antineoplastic Agents; beta-Cyclodextrins; Chemical Phenomena; Coumaric Acids; Hep G2 Cells; Humans; Solubility; X-Ray Diffraction

In this paper the presence of selected prenylated and unprenylated phenylpropanoids, namely ferulic acid 1, boropinic acid 2, 4'-geranyloxyferulic acid 3, umbelliferone 4, 7-isopentenyloxycoumarin 5, and auraptene 6, have been determined in Italian raw propolis after having been extracted with different methodologies. An aqueous solution of β-cyclodextrin was the best extraction method for ferulic acid 1, treatment with indifferently EtOH or aqueous β-cyclodextrin were the most effective one for umbelliferone 4, boropinic acid 2 gave the best yields either with H2O/β-cyclodextrin or olive oil treatment or in biphasic systems, maceration with biphasic mixtures of aqueous β-cyclodextrin and olive oil was seen to be the most effective procedure for 7-isopentenyloxycoumarin 5, the only method providing significant quantities of 4'-geranyloxyferulic acid 3 was the maceration of raw propolis with olive oil, and finally auraptene 4 was best extracted with absolute EtOH. "Classic" maceration in general performed better than ultrasound-assisted one.

Topics: beta-Cyclodextrins; Chromatography, High Pressure Liquid; Coumaric Acids; Coumarins; Italy; Propanols; Propolis; Umbelliferones

The complexes formed by two polyphenols, trans-Ferulic acid (FA) and Gallic acid (GA) with 2-hydroxypropyl-b-cyclodextrin (HPβCD), by the spray-drying method, were studied. Encapsulation-efficiencies (EE) of the complexes prepared were evaluated by HPLC. In the case of co-encapsulation, the EE of GA was lowered, whereas that of FA was almost stable, indicating a possible antagonistic relationship between the two phenols for the HPβCD cavity. The physicochemical characterization of the complexes was carried out by Fourier Transform Infrared Spectroscopy (FT-IR), Differential Scanning Calorimetry (DSC), and Scanning Electron Microscopy (SEM). SEM observations revealed that the coencapsulated phenolic complex resulted in a more rounded shape outer surfaces of HPβCD than when encapsulated separately. FT-IR and DSC data indicated that the two polyphenols exhibit a possible interaction in the coencapsulated complex. The complexes showed no loss of their ability to scavenge DPPH radical relatively to the single agent at the concentrations used.

Topics: 2-Hydroxypropyl-beta-cyclodextrin; beta-Cyclodextrins; Biphenyl Compounds; Calorimetry, Differential Scanning; Chemical Phenomena; Coumaric Acids; Drug Compounding; Gallic Acid; Microscopy, Electron, Scanning; Picrates; Spectroscopy, Fourier Transform Infrared