کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2487226 | 1114409 | 2009 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High-Throughput Phase-Distribution Method to Determine Drug-Cyclodextrin Binding Constants
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کلمات کلیدی
موضوعات مرتبط
علوم پزشکی و سلامت
داروسازی، سم شناسی و علوم دارویی
اکتشاف دارویی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: High-Throughput Phase-Distribution Method to Determine Drug-Cyclodextrin Binding Constants High-Throughput Phase-Distribution Method to Determine Drug-Cyclodextrin Binding Constants](/preview/png/2487226.png)
چکیده انگلیسی
A high-throughput method has been developed to measure drug-cyclodextrin binding constants. It measures the distribution ratio of a drug between a polymer film [polyvinyl chloride (PVC) with 67% (w/w) dioctyl sebacate (DOS)] and a cyclodextrin-containing buffer in a 96-well format. Measurements of distribution ratios at several cyclodextrin concentrations lead to binding constants. Binding constants for econazole with six CDs have been determined in one 96-well microplate with four replications of each condition in 10 h. The K1:1/103 Mâ1 values are 3.98â±â0.13, 3.90â±â0.22, 29.3â±â2.2, 0.66â±â0.04, 1.78â±â0.30, 4.08â±â0.50, with (2-hydroxyethyl)-β-cyclodextrin, (2-hydroxypropyl)-β-cyclodextrin, 2,6-di-O-methyl-β-cyclodextrin, heptakis(2,3,6-tri-O-methyl)-β-cyclodextrin, α-cyclodextrin, β-cyclodextrin, respectively. It is likely that 1:2 complexes are also formed in some cases. This method has also been applied to study the binding behavior as a function of the drug concentration and pH. Binding weakens at higher drug concentration which may be due to the self-association of the drug. An acidic environment decreases the binding constant of CD with the basic econazole. The formation of the 1:2 complexes is completely suppressed in acid as well. This protocol is faster than the phase-solubility method. Moreover, the material requirement is up to four orders of magnitude lower. © 2008 Wiley-Liss, Inc. and the American Pharmacists Association J Pharm Sci 98:229-238, 2009
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Pharmaceutical Sciences - Volume 98, Issue 1, January 2009, Pages 229-238
Journal: Journal of Pharmaceutical Sciences - Volume 98, Issue 1, January 2009, Pages 229-238
نویسندگان
Zhi Chen, Dujuan Lu, Stephen G. Weber,