Spatiotemporal patterning of photoresponsive DNA-based hydrogels to tune local cell responses

Fujian Huang (), Mengxi Chen, Zhixin Zhou, Ruilin Duan, Fan Xia () and Itamar Willner ()
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Fujian Huang: State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences
Mengxi Chen: State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences
Zhixin Zhou: Institute of Chemistry, Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem
Ruilin Duan: State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences
Fan Xia: State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences
Itamar Willner: Institute of Chemistry, Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem

Nature Communications, 2021, vol. 12, issue 1, 1-14

Abstract: Abstract Understanding the spatiotemporal effects of surface topographies and modulated stiffness and anisotropic stresses of hydrogels on cell growth remains a biophysical challenge. Here we introduce the photolithographic patterning or two-photon laser scanning confocal microscopy patterning of a series of o-nitrobenzylphosphate ester nucleic acid-based polyacrylamide hydrogel films generating periodically-spaced circular patterned domains surrounded by continuous hydrogel matrices. The patterning processes lead to guided modulated stiffness differences between the patterned domains and the surrounding hydrogel matrices, and to the selective functionalization of sub-regions of the films with nucleic acid anchoring tethers. HeLa cells are deposited on the circularly-shaped domains functionalized with the MUC-1 aptamers. Initiation of the hybridization chain reaction by nucleic acid tethers associated with the continuous hydrogel matrix results in stress-induced ordered orthogonal shape-changes on the patterned domains, leading to ordered shapes of cell aggregates bound to the patterns.

Date: 2021
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DOI: 10.1038/s41467-021-22645-8

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