کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5821239 | 1557438 | 2011 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Use of cyclodextrins as solubilizing agents for simvastatin: Effect of hydroxypropyl-β-cyclodextrin on lactone/hydroxyacid aqueous equilibrium
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کلمات کلیدی
موضوعات مرتبط
علوم پزشکی و سلامت
داروسازی، سم شناسی و علوم دارویی
علوم دارویی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Use of cyclodextrins as solubilizing agents for simvastatin: Effect of hydroxypropyl-β-cyclodextrin on lactone/hydroxyacid aqueous equilibrium Use of cyclodextrins as solubilizing agents for simvastatin: Effect of hydroxypropyl-β-cyclodextrin on lactone/hydroxyacid aqueous equilibrium](/preview/png/5821239.png)
چکیده انگلیسی
The chemical conversion of simvastatin from the lactone (SVL) to the hydroxyacid (SVA) form is becoming an intriguing issue associated with the pharmacological use of SVL. On this matter, recent findings suggest that SVL complexation with cyclodextrins (CDs) may be a useful strategy to affect its aqueous solubility and chemical stability. In this work, a reverse-phase high-performance liquid chromatography (RP-HPLC) method able to selectively identify and quantify SVL and SVA has been set up, validated and applied to follow SVL hydrolysis in the presence of HPβCD. The combination of stability results with simvastatin/HPβCD stability constants achieved from UV-vis measurements and solubility/dissolution studies allowed to get an insight into SVL/HPβCD, SVA/HPβCD and SVL/SVA equilibria taking place in aqueous solution. Results show that in the presence of HPβCD the aqueous SVL/SVA equilibrium is shifted versus the hydroxyacid form. UV-vis results, showing that the lactone and the open-ring form of simvastatin interact with HPβCD in a similar extent, suggest that hydrolysis occurs also on SVL/HPβCD complex, thus supporting a mode of interaction that does not involve the lactone ring. This hypothesis is strengthened by NMR analysis performed on SVA, HPβCD and their inclusion complex, which indicates that the lactone ring is not included in HPβCD hydrophobic cavity. Finally, results suggest that particular attention must be paid to SVL lactonization in aqueous solution when using CD-based formulations and in demonstrating their effective benefit for a specific therapeutic use.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Pharmaceutics - Volume 404, Issues 1â2, 14 February 2011, Pages 49-56
Journal: International Journal of Pharmaceutics - Volume 404, Issues 1â2, 14 February 2011, Pages 49-56
نویسندگان
Francesca Ungaro, Concetta Giovino, Ovidio Catanzano, Agnese Miro, Andrea Mele, Fabiana Quaglia, Maria Immacolata La Rotonda,