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Cationic poly(VCL–AETA) hydrogels and ovalbumin (OVA) release in vitro

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Abstract

The objective of this research is to explore the synthesis of a new family of water soluble polycationic copolymeric precursors that could be photo-crosslinked into hydrogels. The in vitro control release of ovalbumin protein (OVA) from this family of hydrogels was also studied to assess the biomedical potential of this new family polycationic hydrogels. A series of novel poly(VCL–AETA) copolymer hydrogels was fabricated in an aqueous medium via photo-induced polymerization and crosslinking of hydrophobic N-vinylcaprolactam (VCL) and hydrophilic [2-(acryloxy)ethyl]trimethylammonium chloride (AETA) monomers over a wide range of VCL to AETA feed molar ratios of 2:1, 1:1, 1:2, 1:5. N,N′-methylene bisacrylamide (MBA) was used as a crosslinker. Ovalbumin (OVA), a model antigen, was preloaded into poly(VCL–AETA) hydrogel precursors and its release profiles in pH 7.4 PBS at 37°C were investigated as a function of VCL to AETA monomer feed ratios over a period of 4 weeks. The in vitro results showed that OVA initial burst and subsequent sustained releases could be controlled by 3 material parameters: the hydrophobic VCL to hydrophilic AETA monomer feed ratios, crosslinking density and hydrogel degradation rate. Thus, the hydrophobic-hydrophilic VCL–AETA hydrogel network for controlled OVA release could offer advantages over organic solvent-based single component polymer system. However, these in vitro OVA release profiles may change in an in vivo environment.

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Acknowledgement

Supported by a NIH grant R01-DE015143-01A2 to F.A. Chen of NYU.

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Author notes

  1. Da-Qing Wu

    Present address: , 11460, Johns Creek Parkway, Duluth, GA, 30097, USA

Authors and Affiliations

  1. Department of Fiber Science and Apparel Design, and Biomedical Engineering Program, Cornell University, Ithaca, NY, 14853-4401, USA

    Da-Qing Wu & Chih-Chang Chu

  2. Department of Oral and Maxillofacial Surgery, College of Dentistry, New York University, 345E 24th Street, New York, NY, 10010-4086, USA

    Fang An Chen

Authors
  1. Da-Qing Wu
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  2. Chih-Chang Chu
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  3. Fang An Chen
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Correspondence to Chih-Chang Chu.

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Wu, DQ., Chu, CC. & Chen, F.A. Cationic poly(VCL–AETA) hydrogels and ovalbumin (OVA) release in vitro. J Mater Sci: Mater Med 19, 3593–3601 (2008). https://doi.org/10.1007/s10856-008-3523-1

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  • DOI: https://doi.org/10.1007/s10856-008-3523-1

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