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Preparation and Properties of Cyclodextrin Inclusion Complexes of

Overview
Journal Molecules
Publisher MDPI
Specialty Biology
Date 2022 May 14
PMID 35566111
Authors
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Abstract

In order to improve the aqueous solubility and enhance the bioavailability of (Hyp), three inclusion complexes (ICs) of Hyp with 2-hydroxypropyl-β-cyclodextrin (2H-β-CD), β-cyclodextrin (β-CD), and methyl-β-cyclodextrin (M-β-CD) were prepared using the ultrasonic method. The characterization of the inclusion complexes (ICs) was achieved using Fourier-transform infrared spectroscopy (FTIR), scanning electronic microscopy (SEM), X-ray powder diffraction (XRPD), thin-layer chromatography (TLC), and H nuclear magnetic resonance (H NMR). The effects of the ICs on the solubility and antioxidant activity of Hyp were investigated. A Job's plot revealed that the Hyp formed ICs with three kinds of cyclodextrin (CD), all at a 1:1 stoichiometric ratio. The FTIR, SEM, XRPD, TLC, and H NMR results confirmed the formation of inclusion complexes. The water solubility of the IC of Hyp with 2-hydroxypropyl-β-cyclodextrin was enhanced 9-fold compared to the solubility of the original Hyp. The antioxidant activity tests showed that the inclusion complexes had higher antioxidant activities compared to free Hyp in vitro and the HO-RAW264.7 cell model. Therefore, encapsulation with CDs can not only improve Hyp's water solubility but can also enhance its biological activity, which provides useful information for the potential application of complexation with Hyp in a clinical context.

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