title: Hydrogel cell patterning incorporating photocaged RGDS peptides.
abstract: As we aim towards enhancing our knowledge of complex cell behaviors and developing intricate cell-based devices and improved therapeutics, it becomes imperative that we be able to control and manipulate the spatial localization of cells. Here we have developed a novel strategy to pattern cells using a hyaluronic acid hydrogel material and photocaged RGDS (Arg-Gly-Asp-Ser) peptides. In this report, we discuss the chemical synthesis and photoactive properties of the caged peptides as well as the subsequent binding of these peptides to our hydrogel base. We further demonstrate the ability of this modified hydrogel material to pattern fibroblast cells on the micron scale using near-UV light exposure through a patterned photomask to selectively switch areas of the hydrogel surface from cell non-adhesive to cell adhesive. The cells are found to adhere and proliferate along the developed line patterns for at least 2.5 days, demonstrating significantly enhanced pattern longevity in comparison with previously reported studies.
authors.affiliation: Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur, Ottawa, ON, K1N 6N5, Canada.
authors.forename: Catherine A
authors.initials: CA
authors.lastname: Goubko
authors.forename: Swapan
authors.initials: S
authors.lastname: Majumdar
authors.forename: Ajoy
authors.initials: A
authors.lastname: Basak
authors.forename: Xudong
authors.initials: X
authors.lastname: Cao
mesh_terms: D016475:3T3 Cells; D000327:Adsorption; D000818:Animals; D019149:Bioreactors; D002448:Cell Adhesion / Q000502:physiology*; D018929:Cell Culture Techniques / Q000295:instrumentation*; D002469:Cell Separation / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D020100:Hydrogels / Q000737:chemistry*; D008027:Light; D051379:Mice; D009842:Oligopeptides / Q000737:chemistry* / Q000493:pharmacokinetics* / Q000528:radiation effects; D010777:Photochemistry / Q000379:methods
chemical_list: D020100:Hydrogels; D009842:Oligopeptides; C046617:arginyl-glycyl-aspartyl-serine