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Modulation of Conductivity of Alginate Hydrogels Containing Reduced Graphene Oxide through the Addition of Proteins.

Authors
  • Raslan, Ahmed1
  • Ciriza, Jesús2, 3, 4
  • Ochoa de Retana, Ana María5
  • Sanjuán, María Luisa6
  • Toprak, Muhammet S7
  • Galvez-Martin, Patricia8
  • Saenz-Del-Burgo, Laura1, 2, 9
  • Pedraz, Jose Luis1, 2, 9
  • 1 NanoBioCel Group, Laboratory of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of the Basque Country UPV/EHU, 01006 Vitoria-Gasteiz, Spain. , (Spain)
  • 2 Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain. , (Spain)
  • 3 Tissue Microenvironment (TME) Lab, Aragón Institute of Engineering Research (I3A), University of Zaragoza, C/Mariano Esquillor s/n, 50018 Zaragoza, Spain. , (Spain)
  • 4 Institute for Health Research Aragón (IIS Aragón), 50009 Zaragoza, Spain. , (Spain)
  • 5 Department of Organic Chemistry I, Faculty of Pharmacy and Lascaray Research Center, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain. , (Spain)
  • 6 Instituto de Ciencia de Materiales de Aragón (Universidad de Zaragoza-CSIC), Facultad de Ciencias, 50009 Zaragoza, Spain. , (Spain)
  • 7 Biomedical and X-ray Physics, Department of Applied Physics, KTH-Royal Institute of Technology, 10691 Stockholm, Sweden. , (Sweden)
  • 8 R&D Animal and Human Health, Bioibérica S.A.U., 08029 Barcelona, Spain. , (Spain)
  • 9 Bioaraba Health Research Institute, Jose Atxotegi, s/n, 01009 Vitoria-Gasteiz, Spain. , (Spain)
Type
Published Article
Journal
Pharmaceutics
Publication Date
Sep 15, 2021
Volume
13
Issue
9
Identifiers
DOI: 10.3390/pharmaceutics13091473
PMID: 34575549
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Modifying hydrogels in order to enhance their conductivity is an exciting field with applications in cardio and neuro-regenerative medicine. Therefore, we have designed hybrid alginate hydrogels containing uncoated and protein-coated reduced graphene oxide (rGO). We specifically studied the adsorption of three different proteins, BSA, elastin, and collagen, and the outcomes when these protein-coated rGO nanocomposites are embedded within the hydrogels. Our results demonstrate that BSA, elastin, and collagen are adsorbed onto the rGO surface, through a non-spontaneous phenomenon that fits Langmuir and pseudo-second-order adsorption models. Protein-coated rGOs are able to preclude further adsorption of erythropoietin, but not insulin. Collagen showed better adsorption capacity than BSA and elastin due to its hydrophobic nature, although requiring more energy. Moreover, collagen-coated rGO hybrid alginate hydrogels showed an enhancement in conductivity, showing that it could be a promising conductive scaffold for regenerative medicine.

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