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Tunable drug loading and release from polypeptide multilayer nanofilms

Original Research

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Authors: Bingbing Jiang, Bingyun Li

Published Date March 2009 Volume 2009:4 Pages 37 - 53
DOI: http://dx.doi.org/10.2147/IJN.S4970

Bingbing Jiang1, Bingyun Li1,2,3

1Biomaterials, Bioengineering and Nanotechnology Laboratory, Department of Orthopaedics, School of Medicine, West Virginia University, Morgantown, WV, USA; 2WVNano Initiative, WV, USA; 3Department of Chemical Engineering, College of Engineering and Mineral Resources, West Virginia University, Morgantown, WV, USA

Abstract: Polypeptide multilayer nanofilms were prepared using electrostatic layer-by-layer self-assembly nanotechnology. Small charged drug molecules (eg, cefazolin, gentamicin, and methylene blue) were loaded in polypeptide multilayer nanofilms. Their loading and release were found to be pH-dependent and could also be controlled by changing the number of film layers and drug incubation time, and applying heat-treatment after film formation. Antibiotic-loaded polypeptide multilayer nanofilms showed controllable antibacterial properties against Staphylococcus aureus. The developed biodegradable polypeptide multilayer nanofilms are capable of loading both positively- and negatively-charged drug molecules and promise to serve as drug delivery systems on biomedical devices for preventing biomedical device-associated infection, which is a significant clinical complication for both civilian and military patients.

Keywords: polypeptide, self-assembly, polyelectrolyte multilayer, nanofilm, charged molecule, tunable release




 

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