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Nano-reservoir Bioadhesive Tablets Enhance Protein Drug Permeability Across the Small Intestine

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Abstract

Most therapeutic proteins are classified as class III drugs according to the Biopharmaceutical Classification System means that the low permeability across the intestinal epithelium is the rate-limited step for their oral absorption. Cationic chitosan nanoparticles have been found to open the tight junctions between epithelial cells. On the other hand, bioadhesive delivery devices could prolong the gastrointestinal residence time. In the present study, we developed a novel nano-reservoir bioadhesive tablets that combining the advantages of cationic nanoparticles and bioadhesive delivery devices anticipated achieving effective transport of sufficient protein drugs across the intestinal epithelium. The nano-reservoir in bioadhesive tablets was composed of chitosan nanoparticles (CS-NPs) loading a model protein drug bovine serum albumin (BSA). The formula of bioadhesive tablets was optimized by using rotatable central composite design and response surface methodology. The nano-reservoir, BSA-loaded CS-NPs, had an average particle diameter of 312.5 ± 12.89 nm and zeta-potential value of 26.76 ± 3.56 mV. Carboxymethyl chitosan added to the formula significantly ameliorated the tight junction damage of the Caco-2 cell monolayer induced by CS-NPs, meanwhile maintained the high transport efficiency of BSA. Permeability study exhibited that these nano-reservoir bioadhesive tablets combining the advantages of cationic nanoparticles and bioadhesive tablets significantly enhanced BSA transport through rabbit small intestine in comparison with either conventional bioadhesive tablets or CS-NPs. Therefore, these nano-reservoir bioadhesive tablets provided a great potential dosage form design for the oral delivery of protein drugs.

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Acknowledgements

The authors gratefully acknowledge the National High Technology Research and Development Program of China (863 Program) (Project No. 2014AA022205) and Fundamental Research Funds for the Central Universities (No. 09ykpy67) for their financial support of this research.

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Authors and Affiliations

  1. Department of Pharmacy, School of Pharmaceutical Sciences, Sun Yat-sen University, University Town, Guangzhou, 510006, People’s Republic of China

    Lifang Yin, Yong Wang, Cuifeng Wang & Min Feng

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  1. Lifang Yin
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  2. Yong Wang
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  3. Cuifeng Wang
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  4. Min Feng
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Correspondence to Cuifeng Wang.

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Yin, L., Wang, Y., Wang, C. et al. Nano-reservoir Bioadhesive Tablets Enhance Protein Drug Permeability Across the Small Intestine. AAPS PharmSciTech 18, 2329–2335 (2017). https://doi.org/10.1208/s12249-016-0709-6

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