AccScience Publishing / IJB / Online First / DOI: 10.36922/ijb.5828
RESEARCH ARTICLE
Early Access

Ink comparison for extrusion-based bioprinting in the context of breast cancer and melanoma models

Stefanie Heltmann-Meyer1 Stefan Fleischer1 Sheetal Kadam1 Aldo R. Boccaccini2 Salvador Kirmsse1 Leonard Forster3 Jörg Teßmar3 Stefan Schrüfer4 Zan Lamberger5 Philipp Stahlhut5 Gregor Lang5 Anja K. Boßerhoff6 Andreas Arkudas1 Raymund E. Horch1 Annika Kengelbach-Weigand1 Rafael Schmid1
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1 Department of Plastic and Hand Surgery, Laboratory for Tissue Engineering and Regenerative Medicine, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg, 91054 Erlangen, Germany
2 Institute of Biomaterials, Friedrich-Alexander-University Erlangen-Nürnberg, 91058 Erlangen, Germany
3 Department of Functional Materials in Medicine and Dentistry at the Institute of Functional Materials and Biofabrication (IFB), University of Würzburg and KeyLab Polymers for Medicine of the Bavarian Polymer Institute (BPI), Pleicherwall 2, 97070 Würzburg, Germany.
4 Institute of Polymer Materials, Friedrich-Alexander-University Erlangen-Nürnberg, 91058 Erlangen, Germany
5 Department for Functional Materials in Medicine and Dentistry, University Hospital of Würzburg, Pleicherwall 2, D-97070 Würzburg, Germany
6 Institute of Biochemistry, Friedrich-Alexander-University Erlangen-Nürnberg, 91054 Erlangen, Germany
Submitted: 8 November 2024 | Accepted: 20 January 2025 | Published: 21 January 2025
(This article belongs to the Special Issue Bioprinting of in Vitro Tissue and Disease Models)
© 2025 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution 4.0 International License ( https://creativecommons.org/licenses/by/4.0/ )
Abstract

Biofabrication has proved to be a versatile and valuable tool for tissue engineering and cancer research in order to mimic different tumor microenvironments. In the present study, four different cell lines, including two melanoma cell lines, Mel Im and Mel Wei, and two breast cancer cell lines, MDA-MB-231 and MCF-7, were tested in combination with four hydrogels. The hydrogels were a composite ink consisting of alginate, hyaluronic acid and gelatine (Alg/HA/Gel), pre-crosslinked oxidized alginate with gelatine (ADA-GEL), alginate with methyl cellulose (Meth-Alg) and acrylated hyaluronic acid (HAA). Rheological analysis and shear stress calculations, printability assays and dynamic mechanical analysis were performed on all the hydrogels. The cell lines were then mixed into the hydrogels, printed and examined over a period of 14 days. The focus was on cell survival in the gel, metabolic activity and cell cycle analysis using FUCCI reporters. The results showed that all hydrogels were well printable and Meth-Alg was the softest gel. The cell lines survived the printing process in all inks, but there were significant differences in the metabolic activity and the predominant cell cycle stage. In Alg/HA/Gel, the cells grew in spheroid colonies. ADA-GEL proved to be a good bioink for all cell lines, which enabled proliferation, migration and supported the metabolic activity of the cells, while Meth-Alg offered pores for spreading and proliferating cells. However, it was shown that HAA resulted in the lowest cell number and metabolic activity for all cell lines due to its high polymer content, leading in senescence. Our data demonstrated that depending on the hypothesis, all inks are valuable approaches for breast cancer and melanoma models.

Keywords
Biofabrication
Bioink
Printability
Survival
Viability
Tumor
Funding
The research was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation), Project Number 326998133, TRR 225 (subprojects C03, A01, A02, A07, and C04).
Conflict of interest
The authors declare they have no competing interests.
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International Journal of Bioprinting, Electronic ISSN: 2424-8002 Print ISSN: 2424-7723, Published by AccScience Publishing