Journal
CARBOHYDRATE POLYMERS
Volume 153, Issue -, Pages 526-534Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.08.018
Keywords
Amidated pectin; NaCMC; Microspheres; Colon-targeting; Progesterone; Factorial design
Categories
Ask authors/readers for more resources
The colon is a promising site for drug targeting owing to its long transit time and mild proteolytic activity. The aim of this study was to prepare new low methoxy amidated pectin/NaCMC microspheres cross linked by a mixture of Zn2+ and Al3+ ions and test their potential for colonic targeting of progesterone. A 24 factorial design was carried out to optimize the preparation conditions. High drug entrapment efficiency (82-99%) was obtained and it increased with increasing drug concentration but decreased with increasing polymer concentration. Drug release rate was directly proportional to the microsphere drug content and inversely related to Al3+ ion concentration. Drug release was minimal during the first 3 h but was significantly improved in the presence of 1% rat caecal contents, confirming the microsphere potential for colonic delivery. The microspheres achieved >2.3-fold enhancement of colonic progesterone permeability. These results confirm the viability of the produced microspheres as colon-targeted drug delivery vehicle. (C) 2016 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available