title: Interaction of Hyaluronan with Cationic Nanoparticles.
abstract: The polysaccharide hyaluronan (HA) is a main component of peri- and extracellular matrix, and an attractive molecule for materials design in tissue engineering and nanomedicine. Here, we study the morphology of complexes that form upon interaction of nanometer-sized amine-coated gold particles with this anionic, linear, and regular biopolymer in solution and grafted to a surface. We find that cationic nanoparticles (NPs) have profound effects on HA morphology on the molecular and supramolecular scale. Quartz crystal microbalance (QCM-D) shows that depending on their relative abundance, cationic NPs promote either strong compaction or swelling of films of surface-grafted HA polymers (HA brushes). Transmission electron and atomic force microscopy reveal that the NPs do also give rise to complexes of distinct morphologies-compact nanoscopic spheres and extended microscopic fibers-upon interaction with HA polymers in solution. In particular, stable and hydrated spherical complexes of single HA polymers with NPs can be prepared when balancing the ionizable groups on HA and NPs. The observed self-assembly phenomena could be useful for the design of drug delivery vehicles and a better understanding of the reorganization of HA-rich synthetic or biological matrices.
authors.affiliation: †CIC biomaGUNE, Paseo Miramon 182, 20009 Donostia - San Sebastian, Spain.
authors.forename: Fouzia
authors.initials: F
authors.lastname: Bano
authors.affiliation: †CIC biomaGUNE, Paseo Miramon 182, 20009 Donostia - San Sebastian, Spain.|§Ikerbasque, Basque Foundation for Science, 48011 Bilbao, Spain.
authors.forename: Mónica
authors.initials: M
authors.lastname: Carril
authors.affiliation: †CIC biomaGUNE, Paseo Miramon 182, 20009 Donostia - San Sebastian, Spain.|‡CIBER-BNN, Paseo Miramon 182, 20009 Donostia - San Sebastian, Spain.
authors.forename: Paolo
authors.initials: P
authors.lastname: Di Gianvincenzo
authors.affiliation: †CIC biomaGUNE, Paseo Miramon 182, 20009 Donostia - San Sebastian, Spain.|∥Université Grenoble Alpes, Grenoble 38041 Cedex 9, France.|⊥CNRS, DCM, BP 53, Grenoble 38041 Cedex 9, France.|#Max-Planck-Institute for Intelligent Systems, Heisenbergstrasse 3, 70569 Stuttgart, Germany.
authors.forename: Ralf P
authors.initials: RP
authors.lastname: Richter
mesh_terms: D000588:Amines / Q000737:chemistry; D002412:Cations / Q000737:chemistry; D006046:Gold / Q000737:chemistry; D006820:Hyaluronic Acid / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D058525:Quartz Crystal Microbalance Techniques; D013499:Surface Properties
chemical_list: D000588:Amines; D002412:Cations; D006046:Gold; D006820:Hyaluronic Acid