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Preparation and characterization of molecularly imprinted poly(hydroxyethyl methacrylate) microspheres for sustained release of gatifloxacin

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Abstract

Molecularly imprinted poly(hydroxyethyl methacrylate) microspheres (PHEMA MIPMs) were prepared via precipitation polymerization in this article, using gatifloxacin (GFLX), hydroxyethyl methacrylate (HEMA), and ethylene glycol dimethacrylate (EGDMA) as template molecule, functional monomer and cross-linker, respectively. The effects of reaction medium, initial total monomers, cross-linker and molecular imprinting on the polymerization were investigated systematically. The interaction between GFLX and HEMA in pre-solution was studied by UV–Visible spectrophotometer, both size and morphology of products were characterized by a scanning electron microscope. When the total initial monomer concentration was 1 vol%, EGDMA content was 70 mol%, a group of uniform PHEMA MIPMs were prepared at different GFLX/MAA molar ratios, with diameter range from 2.06 ± 0.07 to 2.82 ± 0.20 μm. The results of drug loading and in vitro release experiments demonstrated that PHEMA MIPMs could achieve a higher GFLX loading content and a more acceptable sustained release than non-imprinted ones.

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Acknowledgments

This work was supported by SRF for ROCS, SEM (23609008), NSFC (31271019), the Key Project of Scientific and Technological Innovation of Colleges and Universities of Guangdong (cxzd1109); the Guangdong Natural Science Foundation (S2011010004545), Science and Technology Projects of Guangdong Province (2011B031300006).

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Authors and Affiliations

  1. Institute of Biomedical Engineering, Jinan University, Guangzhou, 510632, People’s Republic of China

    Xue-Fei Lu, Yun-feng Shi, Ye-Yun Fu, Dong Ma & Wei Xue

  2. Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Jinan University, Guangzhou, 510632, People’s Republic of China

    Xue-Fei Lu, Yun-feng Shi, Ye-Yun Fu, Dong Ma & Wei Xue

  3. The Second Peoples Hospital of Foshan, Foshan, 528000, People’s Republic of China

    Hong-Ling Lv

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  1. Xue-Fei Lu
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Correspondence to Wei Xue.

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Xue-Fei Lu and Yun-feng Shi contributed equally to this work.

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Lu, XF., Shi, Yf., Lv, HL. et al. Preparation and characterization of molecularly imprinted poly(hydroxyethyl methacrylate) microspheres for sustained release of gatifloxacin. J Mater Sci: Mater Med 25, 1461–1469 (2014). https://doi.org/10.1007/s10856-014-5191-7

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  • DOI: https://doi.org/10.1007/s10856-014-5191-7

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