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Hydrogel bioprinted microchannel networks for vascularization of tissue engineering constructs
Open accessAbstract
Vascularization remains a critical challenge in tissue engineering. The development of vascular networks within densely populated and metabolically functional tissues facilitate transport of nutrients and removal of waste products, thus preserving cellular viability over a long period of time. Despite tremendous progress in fabricating complex tissue constructs in the past few years, approaches for controlled vascularization within hydrogel based engineered tissue constructs have remained limited. Here, we report a three dimensional (3D) micromolding technique utilizing bioprinted agarose template fibers to fabricate microchannel networks with various architectural features within photocrosslinkable hydrogel constructs. Using the proposed approach, we were able to successfully embed functional and perfusable microchannels inside methacrylated gelatin (GelMA), star poly(ethylene glycol-co-lactide) acrylate (SPELA), poly(ethylene glycol) dimethacrylate (PEGDMA) and poly(ethylene glycol) diacrylate (PEGDA) hydrogels at different concentrations. In particular, GelMA hydrogels were used as a model to demonstrate the functionality of the fabricated vascular networks in improving mass transport, cellular viability and differentiation within the cell-laden tissue constructs. In addition, successful formation of endothelial monolayers within the fabricated channels was confirmed. Overall, our proposed strategy represents an effective technique for vascularization of hydrogel constructs with useful applications in tissue engineering and organs on a chip.
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“Microfabrication enables the use of biomaterials to 1) support long-lasting open EC lumens for perfusion; 2) define sophisticated capillary networks to mimic the hierarchy of native vasculature; 3) guide and support EC growth and maintain their cellular functions [259–263].”
From Cardiovascular disease models: A game changing paradigm in drug discovery and screening (2019) · cites this paper as [263]
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Cites
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Synthesis, properties, and biomedical applications of gelatin methacryloyl (GelMA) hydrogels
Yue, K., Trujillo-de Santiago, G., Alvarez, M. M., Tamayol, A., Annabi, N., & Khademhosseini, A. (2015) · Biomaterials · doi:10.1016/j.biomaterials.2015.08.045 · Cited by 3,146
“The sacrificial agarose segments could be eas ily removed from the GelMA matrix by simply pulling of the agarose cords, resulting in a bioprinted GelMA scaffold with internal hollow “vessels” [63].”
BackgroundMethodInfluentialSelf-citationAdvances in engineering hydrogels
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Metadata
- Authors
- Bertassoni, L. E., Cecconi, M., Manoharan, V., Nikkhah, M., Hjortnaes, J., Cristino, A. L., Barabaschi, G., Demarchi, D., Dokmeci, M. R., Yang, Y., & Khademhosseini, A.
- Affiliations
- Brigham and Women's Hospital (US)
- Politecnico di Torino (IT)
- Stanford Medicine (US)
- Corresponding author
- Khademhosseini, Ali
- ORCID
- Venue
- Lab Chip
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2014
- Volume
- 14
- Issue
- 13
- Pages
- 2202-2211
- ISSN
- 1473-0189 (ISSN-L)
- 1473-0197
- PMC
- PMC4201051
- OpenAlex
- W2129322399
- Cited by
- 944
- References
- 50
- Citations by year
- 2026: 34 · 2025: 53 · 2024: 63 · 2023: 78 · 2022: 55 · 2021: 102 · 2020: 96 · 2019: 129 · 2018: 104 · 2017: 87 · 2016: 76 · 2015: 50 · 2014: 16
- FWCI
- 39.64
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Lab on a Chip (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- PORTO@Iris (submittedVersion)
- PORTO Publications Open Repository TOrino (Politecnico di Torino) (submittedVersion)
- Funders
- National Institutes of Health
- Defense Threat Reduction Agency
- Australian Research Council
- National Heart, Lung, and Blood Institute (HL-099073, R01HL099073)
- National Institute of General Medical Sciences (R01GM095906, GM095906)
- National Institute of Allergy and Infectious Diseases (R01AI081534, AI081534)
- National Institute of Arthritis and Musculoskeletal and Skin Diseases (AR057837, R01AR057837)
- National Institute of Biomedical Imaging and Bioengineering (EB02597)
- National Institute of Dental and Craniofacial Research (DE021468, R01DE021468)
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › 3D Printing in Biomedical Research
- Physical Sciences › Materials Science › Biomaterials › Hydrogels: synthesis, properties, applications
- Health Sciences › Medicine › Surgery › Tissue Engineering and Regenerative Medicine
- Keywords
- microchannel networks, vascularization, gelatin methacryloyl, poly(ethylene glycol) diacrylate, poly(ethylene glycol) dimethacrylate, endothelial monolayer, mass transfer, cell viability, cell differentiation, organ-on-a-chip
- MeSH terms
- Animals, Blood Vessel Prosthesis, Cell Line, Osteoblasts, Polyethylene Glycols, Sepharose, Hydrogels, Tissue Engineering, Mice
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