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Bio-Design and Manufacturing  2020 Vol.3 No.1 P.48-59


Bioprinting and in vitro characterization of alginate dialdehyde–gelatin hydrogel bio‑ink

Author(s):  Fu You, Xia Wu, Michael Kelly, Xiongbiao Chen

Affiliation(s):  Division of Biomedical Engineering, College of Engineering, University of Saskatchewan, Saskatoon, SK S7N 5A9, Canada; more

Corresponding email(s):   xbc719@mail.usask.ca

Key Words:  Bioprinting, Alginate dialdehyde, Gelatin, Bio-ink

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Fu You, Xia Wu, Michael Kelly, Xiongbiao Chen. Bioprinting and in vitro characterization of alginate dialdehyde–gelatin hydrogel bio‑ink[J]. Journal of Zhejiang University Science D, 2020, 3(1): 48-59.

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author="Fu You, Xia Wu, Michael Kelly, Xiongbiao Chen",
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publisher="Zhejiang University Press & Springer",

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%A Fu You
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%J Journal of Zhejiang University SCIENCE D
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%I Zhejiang University Press & Springer
%DOI 10.1007/s42242-020-00058-8

T1 - Bioprinting and in vitro characterization of alginate dialdehyde–gelatin hydrogel bio‑ink
A1 - Fu You
A1 - Xia Wu
A1 - Michael Kelly
A1 - Xiongbiao Chen
J0 - Journal of Zhejiang University Science D
VL - 3
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PB - Zhejiang University Press & Springer
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DOI - 10.1007/s42242-020-00058-8

Cell-laden cardiac patches have recently been emerging to renew cellular sources for myocardial infarction (MI, commonly know as a heart attack) repair. However, the fabrication of cell-laden patches with porous structure remains challenging due to the limitations of currently available hydrogels and existing processing techniques. The present study utilized a bioprinting technique to fabricate hydrogel patches and characterize them in terms of printability, mechanical and biological properties. Cell-laden hydrogel (or bio-ink) was formulated from alginate dialdehyde (ADA) and gelatin (GEL) to improve the printability, degradability as well as bioactivity. Five groups of hydrogel compositions were designed to investigate the infuence of the oxidation degree of ADA and hydrogels concentration on the properties of printed scafolds. ADA–GEL hydrogels have generally shown favorable for living cells (EA.hy926 cells and hybrid human umbilical vein endothelial cell line). The hydrogel with an oxidation degree of 10% and a concentration ratio of 70/30 (or 10%ADA70–GEL30) demonstrated the best printability among the groups examined. Formulated hydrogels were also bioprinted with the living cells (EA.hy926), and the scafolds printed were then subject to the cell culture for 7 days. Our results illustrate that the scafolds bioprinted from 10%ADA70–GEL30 hydrogels had the best homogenous cell distribution and also the highest cell viability. Taken together, in the present study we synthesized a newly formulated bio-ink from ADA and GEL and for the fst time, used them to bioprint cardiac patches, which have the potential to be used in MI repair.

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