Reversibility and Regioselectivity in Thiol/Disulfide Interchange of Tocinoic Acid with Glutathione in Lyophilized Solids

被引：5
|
作者：
Zhang, Lei [1 ]
Williams, Todd D. [2 ]
Topp, Elizabeth M. [1 ]
机构：
[1] Univ Kansas, Dept Pharmaceut Chem, Lawrence, KS 66047 USA
[2] Univ Kansas, Mass Spectrometry Lab, Lawrence, KS 66045 USA
来源：
JOURNAL OF PHARMACEUTICAL SCIENCES | 2009年 / 98卷 / 09期
关键词：
protein aggregation; peptides; solid state; lyophilization; thiol/disulfide interchange; equilibrium; kinetics; STABILITY; AGGREGATION; PROTEINS; REACTIVITY;
D O I：
10.1002/jps.21516
中图分类号：
R914 [药物化学];
学科分类号：
100701 ;
摘要：
Thiol/disulfide interchange is one of the most common routes of aggregation of lyophilized protein drug products, but the mechanisms of the reaction in the solid state have not been established. Here, we report perturbations in thiol/disulfide interchange upon lyophilization, using tocionic acid (cycloCYIQNC; TA(ox)) and glutathione (GSH) as model peptides. The results suggest that thiol/disulfide interchange reactions differ in aqueous solution and in dry lyophilized solids with regard to reversibility and regioselectivity. In solids, the reaction of TA(ox) with GSH is effectively irreversible and the less-hindered single mixed disulfide is formed exclusively. (C) 2008 Wiley-Liss, Inc. and the American Pharmacists Association J Pharm Sci 98:3312-3318, 2009
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页码：3312 / 3318
页数：7
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