Colon targeted Curcumin microspheres laden with ascorbic acid for bioavailability enhancement.
J Microencapsul. 2018 Jul 16:1-28. Epub 2018 Jul 16. PMID: 30010458
Preeti G Karade
An objective of the present study was to prepare colon specific microspheres of Curcumin (CUR) containing Ascorbic acid (AA) for improved oral bioavailability. 3factorial design was used to optimize Chitosan microspheres (CSMS) containing CUR and AA. Subsequently, optimized CSMS were coated with Eudragit S-100, for delivery to colon. In vitro drug release, in vivo pharmacokinetics and organ distribution studies were performed in Albino wistar rats. Stabilization of CUR in alkaline pH was successfully guarded by AA to the extent 98.5-100%. Results revealed complete amorphization/molecular dispersion of CUR. Bioavailability enhancement of CUR and 90% of MS in colon at the end of 8 hours in animals, deciphered successful design of colon specific CUR microspheres. It can be concluded that AA in MS shielded the degradation of CUR. The developed double coat MS could be considered as a promising colon targeted system for CUR aiming bioavailability enhancements.