Non-leaching, highly biocompatible nanocellulose surfaces that efficiently resist fouling by bacteria in an artificial dermis model

Hassan, Ghada and Forsman, Nina and Wan, Xing and Keurulainen, Leena and Bimbo, Luis M. and Stehl, Susanne and van Charante, Frits and Chrubasik, Michael and Prakash, Aruna S. and Johansson, Leena-Sisko and Mullen, Declan C. and Johnston, Blair F. and Zimmermann, Ralf and Werner, Carsten and Yli-Kauhaluoma, Jari and Coenye, Tom and Saris, Per E. J. and Österberg, Monika and Moreira, Vânia M. (2020) Non-leaching, highly biocompatible nanocellulose surfaces that efficiently resist fouling by bacteria in an artificial dermis model. ACS Applied Bio Materials, 3 (7). pp. 4095-4108. (https://doi.org/10.1021/acsabm.0c00203)

[thumbnail of Hassan-etal-ABM-2020-Non-leaching-highly-biocompatible-nanocellulose-surfaces]
Preview
 Text. Filename: Hassan_etal_ABM_2020_Non_leaching_highly_biocompatible_nanocellulose_surfaces.pdf
Final Published Version
License: Creative Commons Attribution 4.0 logo
Download (7MB)| Preview

Abstract

Bacterial biofilm infections incur massive costs on healthcare systems worldwide. Particularly worrisome are the infections associated with pressure ulcers and prosthetic, plastic, and reconstructive surgeries, where staphylococci are the major biofilm-forming pathogens. Non-leaching antimicrobial surfaces offer great promise for the design of bioactive coatings to be used in medical devices. However, the vast majority are cationic, which brings about undesirable toxicity. To circumvent this issue, we have developed antimicrobial nanocellulose films by direct functionalization of the surface with dehydroabietic acid derivatives. Our conceptually unique design generates non-leaching anionic surfaces that reduce the number of viable staphylococci in suspension, including drug-resistant Staphylococcus aureus, by an impressive 4-5 log units, upon contact. Moreover, the films clearly prevent bacterial colonization of the surface in a model mimicking the physiological environment in chronic wounds. Their activity is not hampered by high protein content, and they nurture fibroblast growth at the surface without causing significant hemolysis. In this work, we have generated nanocellulose films with indisputable antimicrobial activity demonstrated using state-of-the-art models that best depict an "in vivo scenario". Our approach is to use fully renewable polymers and find suitable alternatives to silver and cationic antimicrobials.

CORE (COnnecting REpositories)