title: Light-triggered in vivo activation of adhesive peptides regulates cell adhesion, inflammation and vascularization of biomaterials.
abstract: Materials engineered to elicit targeted cellular responses in regenerative medicine must display bioligands with precise spatial and temporal control. Although materials with temporally regulated presentation of bioadhesive ligands using external triggers, such as light and electric fields, have recently been realized for cells in culture, the impact of in vivo temporal ligand presentation on cell-material responses is unknown. Here, we present a general strategy to temporally and spatially control the in vivo presentation of bioligands using cell-adhesive peptides with a protecting group that can be easily removed via transdermal light exposure to render the peptide fully active. We demonstrate that non-invasive, transdermal time-regulated activation of cell-adhesive RGD peptide on implanted biomaterials regulates in vivo cell adhesion, inflammation, fibrous encapsulation, and vascularization of the material. This work shows that triggered in vivo presentation of bioligands can be harnessed to direct tissue reparative responses associated with implanted biomaterials.
authors.affiliation: 1] Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA [2] Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
authors.forename: Ted T
authors.initials: TT
authors.lastname: Lee
authors.affiliation: 1] Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA [2] Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
authors.forename: José R
authors.initials: JR
authors.lastname: García
authors.affiliation: Max-Planck-Institut für Polymerforschung, Mainz 55128, Germany.
authors.forename: Julieta I
authors.initials: JI
authors.lastname: Paez
authors.affiliation: 1] Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA [2] Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, USA [3] Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York 14853, USA.
authors.forename: Ankur
authors.initials: A
authors.lastname: Singh
authors.affiliation: 1] Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA [2] Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
authors.forename: Edward A
authors.initials: EA
authors.lastname: Phelps
authors.affiliation: Max-Planck-Institut für Polymerforschung, Mainz 55128, Germany.
authors.forename: Simone
authors.initials: S
authors.lastname: Weis
authors.affiliation: Max-Planck-Institut für Polymerforschung, Mainz 55128, Germany.
authors.forename: Zahid
authors.initials: Z
authors.lastname: Shafiq
authors.affiliation: 1] Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA [2] Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
authors.forename: Asha
authors.initials: A
authors.lastname: Shekaran
authors.affiliation: Max-Planck-Institut für Polymerforschung, Mainz 55128, Germany.
authors.forename: Aránzazu
authors.initials: A
authors.lastname: Del Campo
authors.affiliation: 1] Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA [2] Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
authors.forename: Andrés J
authors.initials: AJ
authors.lastname: García
mesh_terms: D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry; D002448:Cell Adhesion / Q000187:drug effects* / Q000276:immunology / Q000528:radiation effects; D015815:Cell Adhesion Molecules / Q000009:adverse effects / Q000528:radiation effects; D002460:Cell Line; D003875:Drug Eruptions / Q000276:immunology*; D005347:Fibroblasts / Q000187:drug effects / Q000276:immunology* / Q000473:pathology; D006801:Humans; D008027:Light; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D041681:NIH 3T3 Cells; D018919:Neovascularization, Physiologic / Q000187:drug effects* / Q000276:immunology*; D009842:Oligopeptides / Q000009:adverse effects* / Q000528:radiation effects*
chemical_list: D001672:Biocompatible Materials; D015815:Cell Adhesion Molecules; D009842:Oligopeptides; C047981:arginyl-glycyl-aspartic acid