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Reference type: Journal
Authors: Çetin K, Denizli A
Article Title: 5-Fluorouracil delivery from metal-ion mediated molecularly imprinted cryogel discs.
Publication date: 2015
Journal: Colloids and Surfaces B: Biointerfaces
Volume: 126
Page numbers: 401-406.
DOI: 10.1016/j.colsurfb.2014.12.038
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0927776514007255

Abstract: The objective of this study is to prepare imprinted cryogel discs for delivery of 5-fluorouracil. The coordinate bond interactions are utilized to accomplish a coordination complex between metal-chelate monomer N-methacryloyl-L-histidine and 5-FU with the assistance of Cu2+ ion. The complex is copolymerized with hydroxyethyl methacrylate to produce poly(hydroxyethyl methacrylate-N-methacryloyl-(L)-histidine methyl ester) cryogel discs. The cryogel discs are characterized thoroughly by performing swelling tests, scanning electron microscopy, differential scanning calorimetry and X-ray diffraction studies. In vitro delivery studies are performed to investigate the effects of cross-linker ratio, medium pH and drug concentration. 5-FU imprinted cryogel discs have highly macroporous structures. Drug molecules are homogeneously dispersed in the 5-FU imprinted cryogel matrix. The cumulative release of 5-FU decreased by increasing the cross-linker density in the polymer matrix. Delivery rate of 5-FU varied with different pH values in a coordination complex since metal ion acts as a Lewis acid, and the ligand, i.e. 5-FU acts as a Lewis base. The cumulative release of 5-FU increased with increasing drug concentration in polymer matrix. The nature of the 5-FU transport mechanism is non-Fickian
Template and target information: 5-fluorouracil, 5-FU
Author keywords: coordinate bonding, Cryogels, 5-fluorouracil delivery, molecular imprinting

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