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Elastin-like Polypeptide-Based Bioink: A Promising Alternative for 3D Bioprinting.
Michèle Dai1,2, Jean-Philippe Belaïdi1, Guillaume Fleury2
1L'Oréal Recherche Avancée, 1 avenue Eugène Schueller, 93600 Aulnay-sous-Bois, France.
Biomacromolecules
|November 9, 2021
Summary
Researchers developed a novel bioink using elastin-like polypeptide (ELP) for 3D bioprinting. This biocompatible material supports cell adhesion and promotes extracellular matrix production, showing promise for tissue engineering applications.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Traditional tissue reconstruction methods lack spatial control.
- Developing advanced bioinks is crucial for complex organ regeneration.
- Existing bioinks often struggle to meet criteria for biocompatibility, printability, and stability.
Purpose of the Study:
- To engineer a novel bioink based on elastin-like polypeptide (ELP) for 3D bioprinting.
- To functionalize the ELP bioink for enhanced cell adhesion and tissue integration.
- To evaluate the printability, mechanical properties, and biocompatibility of the developed bioink.
Main Methods:
- Chemoselective modification of recombinant ELP with cross-linkable moieties.
- Photopolymerization to form a 3D network.
- Functionalization with GRGDS peptide or collagen I for cell adhesion.
- Assessment of printability, mechanical properties (stiffness, elasticity), and biocompatibility using normal human fibroblasts (NHF).
- Analysis of extracellular matrix (ECM) protein marker expression (pro-collagen I, elastin, fibrillin, fibronectin).
Main Results:
- The ELP-based bioink demonstrated excellent printability and desirable mechanical properties (stiffness, elasticity).
- The bioink exhibited good biocompatibility, supporting NHF viability and adhesion.
- Significant expression of key ECM proteins was observed within the 3D construct after 18 days of culture.
Conclusions:
- Engineered ELP-based bioinks offer a promising platform for 3D bioprinting applications in tissue engineering.
- The developed bioink supports cell adhesion and promotes endogenous ECM production, crucial for functional tissue regeneration.
- This approach advances the development of sophisticated biomaterials for creating complex, functional tissue constructs.
