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- W2088896144 abstract "The purpose of the study was to evaluate the effect of cyclodextrin (CD) complexation on the chemical and physical stability of a polypeptide hormone glucagon and to study the interactions between glucagon and γ-cyclodextrin molecules in inclusion complexes. The chemical stability of glucagon at pH 2.0 was studied with HPLC–UV and HPLC–MS/MS. The physical stability of glucagon at pH 2.5 was studied by measuring the turbidity (A405nm) and viscosity (Ostwald capillary viscosimeter) of the samples. The structure of glucagon/γ-CD complexes at pH 2.5 was studied with 2D-NMR. The presence of various CDs increased the chemical half-life of glucagon at pH 2.0 (37°C, 0.01 M HCl, ionic strength 0.15) and prolonged the lag-time before aggregation at pH 2.5 (0.9% (w/v) NaCl in 3.2 mM HCl). The NMR studies showed that the side chains of all the aromatic amino acid residues (Phe6, Tyr10, Tyr13, Phe22, Trp25) and leucines (Leu14 and Leu26) of glucagon interacted with the cavities of the γ-CD molecules. The present study shows that glucagon forms inclusion complexes with cyclodextrins in acidic solution, resulting in an improvement in its chemical and physical stability." @default.
- W2088896144 created "2016-06-24" @default.
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- W2088896144 date "2008-07-01" @default.
- W2088896144 modified "2023-10-11" @default.
- W2088896144 title "The Effect of Cyclodextrins on Chemical and Physical Stability of Glucagon and Characterization of Glucagon/γ-CD Inclusion Complexes" @default.
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- W2088896144 doi "https://doi.org/10.1002/jps.21209" @default.
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