Colon targeted bioadhesive pellets of curcumin and cyclosporine for improved management of inflammatory bowel disease
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ORIGINAL ARTICLE
Colon targeted bioadhesive pellets of curcumin and cyclosporine for improved management of inflammatory bowel disease Neha Desai 1 & Munira Momin 1
# Controlled Release Society 2020
Abstract The objective of the present work was to develop and optimize multiparticulate pH-dependent bioadhesive pellets of curcumin and cyclosporine for the management of intestinal bowel disease (IBD). The bioadhesive sustained release pellets were intended for targeting the affected site for an improved therapeutic effect. Bioadhesive pellet cores of curcumin and cyclosporine were formulated using Carbopol 940 (CP940) and hydroxypropyl cellulose (HPC-H) by the extrusion/spheronization method, and drug delivery to the colon was controlled by the pH-sensitive polymer Eudragit® S100. Microcrystalline cellulose (Avicel PH101) was found to be the best forming agent for pellet core. The ratio of CP940 to HPC-H was kept at 1:1 to achieve 100% bioadhesion. The in vitro dissolution profiles of coated pellets depicted that 12.327 ± 0.342% of curcumin and 14.751 ± 0.112% of cyclosporine were released at the end of 6 h (at pH 6.8), whereas 71.278 ± 0.100% of curcumin and 76.76 ± 0.195% of cyclosporine were released at the end of 24 h (at pH 7.4). The drug release profile was found to follow zero-order kinetics for both drugs. The selected formulation was evaluated on an acetic acid-induced ulcerative colitis in the rat model to evaluate the efficiency of drug-loaded pellets coated with Eudragit®S100. The pharmacodynamic study revealed the therapeutic efficacy of Eudragit®S100-coated pellets of curcumin and cyclosporine in alleviating the conditions of the acetic acid-induced colitis model as reflected by weight gain as well as improvement of clinical, macroscopic and microscopic parameters of induced colitis, as compared with free curcumin and cyclosporine. The combination of curcumin and cyclosporine has been proven to have a synergistic effect for the successful management of IBD when used in a low dose as compared with individual drugs with high doses. Hence, curcumin- and cyclosporine-loaded bioadhesive pellets may act as a promising targeted drug delivery system in the management of IBD. Keywords Extrusion . Spheronization . Curcumin . Cyclosporine . Colonic delivery
Introduction Oral colon targeted drug delivery is broadly utilized in the treatment of intestinal bowel disease (IBD) viz. Crohn’s disease and ulcerative colitis (UC) [1, 2]. The treatment strategies include the utilization of aminosalicylates, corticosteroids, immunosuppressants, antibiotics and biologics [3, 4]. The conventional drug delivery system of these therapeutic agents causes unfavourable adverse drug reactions and side effects to neighbour organs and furthermore limits the therapeutic * Neha Desai [email protected] 1
Department of Pharmaceutics, SVKM’s Dr. Bhanuben Nanavati College of Pharmacy, Gate No. 1, SVKM Campus, V. M. Road, Vile Parle (W), Mumbai 400 056, India
efficacy of the medications [3–5]. For this purpose, a colon targeted dru
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