Chitosan-dextran sulfate nanoparticles for delivery of an anti-angiogenesis peptide

Letters in Peptide Science volume 10, pages621–629(2003)Cite this article

Summary

A novel nanoparticle delivery system has been developed by employing the oppositely charged polymers chitosan (CS) and dextran sulfate (DS), and a simple coacervation process. Under the conditions investigated, the weight ratio of the two polymers is identified as a determining factor controlling particle size, surface charge, entrapment efficiency and release characteristics of the nanoparticles produced. Particles of 223 nm mean diameter were produced under optimal conditions with a zeta potential of approximately −32.6 mV. A maximum of 75% anti-angiogenesis peptide entrapment efficiency was achieved with a CS:DS weight ratio of 0.59∶1. The same nanoparticle formulation also showed slow and sustained peptide release over a period of 6 days. In contrast, the formulation containing a lower ratio of CS:DS (0.5∶1) was found to have reduced entrapment efficiency and more rapid peptide release characteristics. The results of this study suggest that physicochemical and release characteristics of the CS-DS nanoparticles can be modulated by changing ratios of two ionic polymers. The novel CS-DS nanoparticles prepared by the coacervation process have potential as a carrier for small peptides.

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Affiliations

  1. Western Australian Biomedical Research Institute, School of Pharmacy, Curtin University, 6845, Perth, Western Australia

    Yan Chen

  2. School of Pharmacy, Curtin University, 6845, Perth, Western Australia

    Yan Chen & John E. Parkin

  3. Fourrts (India) Laboratories Private Limited, Chennai, India

    Vellore J. Mohanraj

Authors
  1. Yan Chen
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  2. Vellore J. Mohanraj
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  3. John E. Parkin
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Correspondence to Yan Chen.

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Chen, Y., Mohanraj, V.J. & Parkin, J.E. Chitosan-dextran sulfate nanoparticles for delivery of an anti-angiogenesis peptide. Lett Pept Sci 10, 621–629 (2003). https://doi.org/10.1007/BF02442596

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Key words

  • chitosan
  • dextran sulphate
  • nanoparticles
  • peptide delivery
  • sustained-release