Your browser doesn't support javascript.
loading
Silk fibroin films with embedded magnetic nanoparticles: evaluation of the magneto-mechanical stimulation effect on osteogenic differentiation of stem cells.
Del Bianco, Lucia; Spizzo, Federico; Yang, Yuejiao; Greco, Gabriele; Gatto, Maria Laura; Barucca, Gianni; Pugno, Nicola M; Motta, Antonella.
Affiliation
  • Del Bianco L; Department of Physics and Earth Science, University of Ferrara, I-44122 Ferrara, Italy. lucia.delbianco@unife.it.
  • Spizzo F; Department of Physics and Earth Science, University of Ferrara, I-44122 Ferrara, Italy. lucia.delbianco@unife.it.
  • Yang Y; BIOtech Research Center, Department of Industrial Engineering, University of Trento, I-38123 Trento, Italy. antonella.motta@unitn.it.
  • Greco G; Laboratory for Bioinspired, Bionic, Nano, Meta, Materials & Mechanics, Department of Civil, Environmental and Mechanical Engineering, University of Trento, I-38123 Trento, Italy.
  • Gatto ML; Department SIMAU, Università Politecnica delle Marche, I-60131 Ancona, Italy.
  • Barucca G; Department SIMAU, Università Politecnica delle Marche, I-60131 Ancona, Italy.
  • Pugno NM; Laboratory for Bioinspired, Bionic, Nano, Meta, Materials & Mechanics, Department of Civil, Environmental and Mechanical Engineering, University of Trento, I-38123 Trento, Italy.
  • Motta A; School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, UK.
Nanoscale ; 14(39): 14558-14574, 2022 Oct 13.
Article in En | MEDLINE | ID: mdl-36149382
ABSTRACT
We report about a biomaterial in the form of film ∼10 µm thick, consisting of a silk fibroin matrix with embedded iron oxide superparamagnetic nanoparticles, for prospective applications as bioactive coating in regenerative medicine. Films with different load of magnetic nanoparticles are produced (nanoparticles/silk fibroin nominal ratio = 5, 0.5 and 0 wt%) and the structural, mechanical and magnetic properties are studied. The nanoparticles form aggregates in the silk fibroin matrix and the film stiffness, as tested by nanoindentation, is spatially inhomogeneous, but the protein structure is not altered. In vitro biological tests are carried out on human bone marrow-derived mesenchymal stem cells cultured on the films up to 21 days, with and without an applied static uniform magnetic field. The sample with the highest nanoparticles/silk fibroin ratio shows the best performance in terms of cell proliferation and adhesion. Moreover, it promotes a faster and better osteogenic differentiation, particularly under magnetic field, as indicated by the gene expression level of typical osteogenic markers. These findings are explained in light of the results of the physical characterization, combined with numerical calculations. It is established that the applied magnetic field triggers a virtuous magneto-mechanical mechanism in which dipolar magnetic forces between the nanoparticle aggregates give rise to a spatial distribution of mechanical stresses in the silk fibroin matrix. The film with the largest nanoparticle load, under cell culture conditions (i.e. in aqueous environment), undergoes matrix deformations large enough to be sensed by the seeded cells as mechanical stimuli favoring the osteogenic differentiation.
Subject(s)

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Magnetite Nanoparticles / Mesenchymal Stem Cells / Fibroins Limits: Humans Language: En Journal: Nanoscale Year: 2022 Document type: Article Affiliation country: Italia Publication country: ENGLAND / ESCOCIA / GB / GREAT BRITAIN / INGLATERRA / REINO UNIDO / SCOTLAND / UK / UNITED KINGDOM

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Magnetite Nanoparticles / Mesenchymal Stem Cells / Fibroins Limits: Humans Language: En Journal: Nanoscale Year: 2022 Document type: Article Affiliation country: Italia Publication country: ENGLAND / ESCOCIA / GB / GREAT BRITAIN / INGLATERRA / REINO UNIDO / SCOTLAND / UK / UNITED KINGDOM