Clickable Dynamic Bioinks Enable Post‐Printing Modifications of Construct Composition and Mechanical Properties Controlled over Time and Space

Author:

Tournier Pierre1ORCID,Saint‐Pé Garance1,Lagneau Nathan1ORCID,Loll François1,Halgand Boris1ORCID,Tessier Arnaud2ORCID,Guicheux Jérôme1ORCID,Visage Catherine Le1ORCID,Delplace Vianney1ORCID

Affiliation:

1. RMeS – Regenerative Medicine and Skeleton (INSERM UMR 1229) Oniris, CHU Nantes, INSERM Nantes Université Nantes F‐44000 France

2. Laboratoire CEISAM (UMR CNRS 6230) Nantes Université Nantes F‐44000 France

Abstract

AbstractBioprinting is a booming technology, with numerous applications in tissue engineering and regenerative medicine. However, most biomaterials designed for bioprinting depend on the use of sacrificial baths and/or non‐physiological stimuli. Printable biomaterials also often lack tunability in terms of their composition and mechanical properties. To address these challenges, the authors introduce a new biomaterial concept that they have termed “clickable dynamic bioinks”. These bioinks use dynamic hydrogels that can be printed, as well as chemically modified via click reactions to fine‐tune the physical and biochemical properties of printed objects after printing. Specifically, using hyaluronic acid (HA) as a polymer of interest, the authors investigate the use of a boronate ester‐based crosslinking reaction to produce dynamic hydrogels that are printable and cytocompatible, allowing for bioprinting. The resulting dynamic bioinks are chemically modified with bioorthogonal click moieties to allow for a variety of post‐printing modifications with molecules carrying the complementary click function. As proofs of concept, the authors perform various post‐printing modifications, including adjusting polymer composition (e.g., HA, chondroitin sulfate, and gelatin) and stiffness, and promoting cell adhesion via adhesive peptide immobilization (i.e., RGD peptide). The results also demonstrate that these modifications can be controlled over time and space, paving the way for 4D bioprinting applications.

Funder

Agence Nationale de la Recherche

Publisher

Wiley

Subject

General Physics and Astronomy,General Engineering,Biochemistry, Genetics and Molecular Biology (miscellaneous),General Materials Science,General Chemical Engineering,Medicine (miscellaneous)

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