Gellan gum microgel-reinforced cell-laden gelatin hydrogels
The relatively weak mechanical properties of hydrogels remain a major drawback for their application as load-bearing tissue scaffolds. Previously, we developed cell-laden double-network (DN) hydrogels that were composed of photocrosslinkable gellan gum (GG) and gelatin. Further research into the mat...
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Royal Society of Chemistry
2016
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| Online Access: | http://hdl.handle.net/1721.1/101210 https://orcid.org/0000-0002-7272-7140 |
| _version_ | 1811075471494873088 |
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| author | Shin, Hyeongho Olsen, Bradley D. Khademhosseini, Ali |
| author2 | Harvard University--MIT Division of Health Sciences and Technology |
| author_facet | Harvard University--MIT Division of Health Sciences and Technology Shin, Hyeongho Olsen, Bradley D. Khademhosseini, Ali |
| author_sort | Shin, Hyeongho |
| collection | MIT |
| description | The relatively weak mechanical properties of hydrogels remain a major drawback for their application as load-bearing tissue scaffolds. Previously, we developed cell-laden double-network (DN) hydrogels that were composed of photocrosslinkable gellan gum (GG) and gelatin. Further research into the materials as tissue scaffolds determined that the strength of the DN hydrogels decreased when they were prepared at cell-compatible conditions, and the encapsulated cells in the DN hydrogels did not function as well as they did in gelatin hydrogels. In this work, we developed microgel-reinforced (MR) hydrogels from the same two polymers, which have better mechanical strength and biological properties in comparison to the DN hydrogels. The MR hydrogels were prepared by incorporating stiff GG microgels into soft and ductile gelatin hydrogels. The MR hydrogels prepared at cell-compatible conditions exhibited higher strength than the DN hydrogels and the gelatin hydrogels, the highest strength being 2.8 times that of the gelatin hydrogels. MC3T3-E1 preosteoblasts encapsulated in MR hydrogels exhibited as high metabolic activity as in gelatin hydrogels, which is significantly higher than that in the DN hydrogels. The measurement of alkaline phosphatase (ALP) activity and the amount of mineralization showed that osteogenic behavior of MC3T3-E1 cells was as much facilitated in the MR hydrogels as in the gelatin hydrogels, while it was not as much facilitated in the DN hydrogels. These results suggest that the MR hydrogels could be a better alternative to the DN hydrogels and have great potential as load-bearing tissue scaffolds. |
| first_indexed | 2024-09-23T10:06:33Z |
| format | Article |
| id | mit-1721.1/101210 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:06:33Z |
| publishDate | 2016 |
| publisher | Royal Society of Chemistry |
| record_format | dspace |
| spelling | mit-1721.1/1012102022-09-30T18:59:46Z Gellan gum microgel-reinforced cell-laden gelatin hydrogels Shin, Hyeongho Olsen, Bradley D. Khademhosseini, Ali Harvard University--MIT Division of Health Sciences and Technology Massachusetts Institute of Technology. Department of Chemical Engineering Massachusetts Institute of Technology. Department of Materials Science and Engineering Shin, Hyeongho Olsen, Bradley D. Khademhosseini, Ali The relatively weak mechanical properties of hydrogels remain a major drawback for their application as load-bearing tissue scaffolds. Previously, we developed cell-laden double-network (DN) hydrogels that were composed of photocrosslinkable gellan gum (GG) and gelatin. Further research into the materials as tissue scaffolds determined that the strength of the DN hydrogels decreased when they were prepared at cell-compatible conditions, and the encapsulated cells in the DN hydrogels did not function as well as they did in gelatin hydrogels. In this work, we developed microgel-reinforced (MR) hydrogels from the same two polymers, which have better mechanical strength and biological properties in comparison to the DN hydrogels. The MR hydrogels were prepared by incorporating stiff GG microgels into soft and ductile gelatin hydrogels. The MR hydrogels prepared at cell-compatible conditions exhibited higher strength than the DN hydrogels and the gelatin hydrogels, the highest strength being 2.8 times that of the gelatin hydrogels. MC3T3-E1 preosteoblasts encapsulated in MR hydrogels exhibited as high metabolic activity as in gelatin hydrogels, which is significantly higher than that in the DN hydrogels. The measurement of alkaline phosphatase (ALP) activity and the amount of mineralization showed that osteogenic behavior of MC3T3-E1 cells was as much facilitated in the MR hydrogels as in the gelatin hydrogels, while it was not as much facilitated in the DN hydrogels. These results suggest that the MR hydrogels could be a better alternative to the DN hydrogels and have great potential as load-bearing tissue scaffolds. Samsung (Firm) (Scholarship) National Institutes of Health (U.S.) (HL092836) National Institutes of Health (U.S.) (DE021468) National Institutes of Health (U.S.) (EB02597) National Institutes of Health (U.S.) (AR057837) National Science Foundation (U.S.) (CAREER Award DMR0847287) 2016-02-18T20:38:24Z 2016-02-18T20:38:24Z 2013-09 2013-07 Article http://purl.org/eprint/type/JournalArticle 2050-750X 2050-7518 http://hdl.handle.net/1721.1/101210 Shin, Hyeongho, Bradley D. Olsen, and Ali Khademhosseini. “Gellan Gum Microgel-Reinforced Cell-Laden Gelatin Hydrogels.” J. Mater. Chem. B 2, no. 17 (2014): 2508–2516. https://orcid.org/0000-0002-7272-7140 en_US http://dx.doi.org/10.1039/c3tb20984a Journal of Materials Chemistry B Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Royal Society of Chemistry PMC |
| spellingShingle | Shin, Hyeongho Olsen, Bradley D. Khademhosseini, Ali Gellan gum microgel-reinforced cell-laden gelatin hydrogels |
| title | Gellan gum microgel-reinforced cell-laden gelatin hydrogels |
| title_full | Gellan gum microgel-reinforced cell-laden gelatin hydrogels |
| title_fullStr | Gellan gum microgel-reinforced cell-laden gelatin hydrogels |
| title_full_unstemmed | Gellan gum microgel-reinforced cell-laden gelatin hydrogels |
| title_short | Gellan gum microgel-reinforced cell-laden gelatin hydrogels |
| title_sort | gellan gum microgel reinforced cell laden gelatin hydrogels |
| url | http://hdl.handle.net/1721.1/101210 https://orcid.org/0000-0002-7272-7140 |
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