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Hydroxypropyl-β-cyclodextrin functionalized calcium carbonate microparticles as a potential carrier for enhancing oral delivery of water-insoluble drugs

Authors Zhang L, Zhu W, Lin Q, Han J, Jiang L, Zhang Y

Received 6 December 2014

Accepted for publication 22 January 2015

Published 30 April 2015 Volume 2015:10(1) Pages 3291—3302

DOI https://doi.org/10.2147/IJN.S78814

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Editor who approved publication: Dr Lei Yang

Lihua Zhang,1 Wufu Zhu,2 Qisi Lin,1 Jin Han,1 Liqun Jiang,1 Yanzhuo Zhang1,3

1Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical College, Xuzhou, People’s Republic of China; 2School of Pharmacy, Jiangxi Science and Technology Normal University, Nanchang, People’s Republic of China; 3Department of Pharmaceutics, School of Pharmacy, Xuzhou Medical College, Xuzhou, People’s Republic of China

Abstract: The objective of the present study was to demonstrate that a novel hydroxypropyl-β-cyclodextrin functionalized calcium carbonate (HP-β-CD/CC) based amorphous solid dispersion (ASD) can be used to increase the solubility and oral bioavailability of water-insoluble drugs. Irbesartan (IRB) was selected as a model compound and loaded into the nanoporous HP-β-CD/CC matrix using an immersion method. The IRB-loaded HP-β-CD/CC formulation was characterized by various analytical techniques, such as specific surface area analysis, scanning electron microscopy (SEM), dynamic light scattering (DLS), powder X-ray diffraction (PXRD), and differential scanning calorimetry (DSC). Analyses with PXRD and DSC confirmed that IRB was fully converted into the amorphous form in the nanopores of HP-β-CD/CC. From the solubility and dissolution tests, it was observed that the aqueous solubility and dissolution rate of IRB-loaded HP-β-CD/CC were increased significantly compared with those of pure IRB and IRB-loaded mesoporous silica. Likewise, the IRB-loaded HP-β-CD/CC formulation exhibited better absorption compared with that of the commercially available IRB capsules in beagle dogs. The mean peak plasma concentration (Cmax) and the area under the mean plasma concentration–time curve (AUC[0→48]) of IRB-loaded HP-β-CD/CC were 1.56- and 1.52-fold higher than that of the commercial product, respectively. Furthermore, the IRB-loaded HP-β-CD/CC formulation exhibited excellent stability against re-crystallization. These results clearly demonstrate that HP-β-CD/CC based porous ASD is a promising formulation approach to improve the aqueous solubility and the in vivo absorption performance of a water-insoluble compound like IRB.

Keywords:
nanopore, solid dispersion, solubility, dissolution rate, bioavailability

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