β-Cyclodextrin Modified Hydrogels of Kappa-Carrageenan for Methotrexate Delivery

Abstract

This work is aimed at developing a kappa-carrageenan (kCR) gel with increased methotrexate (MTX) content. β-Cyclodextrin (βCD), which is able to inclusion complex formation with MTX, has been used to increase the drug concentration in the hydrogel. The rheological behavior of the designed gels was investigated and the influence of MTX and βCD on the viscoelastic properties of kCR gel was studied in detail. The effect of βCD and its concentration on the MTX-releasing rate from the kCR gels was examined. The properties of kappa- and iota-carrageenans loaded with MTX were compared and the differences observed were explained in terms of different binding affinities of MTX to these polymers. The obtained gels provided desirable viscoelastic properties useful for topical application.

Kappa-carrageenan and sodium alginate-based pH-responsive hydrogels for controlled release of methotrexate

“…Similarly, Zarbab et al reported guar gum/chitosan/PVA hydrogels cross-linked with tetra orthosilicate hydrogels; 96% MTX was released in 7 h and 25 min in PBS at pH 7.4 for the treatment of colon cancer [ 54 ]. Nikitina et al developed k-CG/MTX and k-CG/ β -cyclodextrin hydrogels which showed 65% and 100% MTX released in 6 h in PBS at pH 7.4, respectively [ 55 ]. Fe 3 O 4 -incorporated k-CG/chitosan hydrogels were reported by Mahdavinia et al .…”