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- W2237296816 abstract "Background aims Cell-based therapies have made an impact on the treatment of osteoarthritis; however, the repair and regeneration of thick cartilage defects is an important and growing clinical problem. Next-generation therapies that combine cells with biomaterials may provide improved outcomes. We have developed modular microenvironments that mimic the composition of articular cartilage as a delivery system for consistently differentiated cells. Methods Human bone marrow–derived mesenchymal stem cells (MSC) were embedded in modular microbeads consisting of agarose (AG) supplemented with 0%, 10% and 20% collagen Type II (COL-II) using a water-in-oil emulsion technique. AG and AG/COL-II microbeads were characterized in terms of their structural integrity, size distribution and protein content. The viability of embedded MSC and their ability to differentiate into osteogenic, adipogenic and chondrogenic lineages over 3 weeks in culture were also assessed. Results Microbeads made with <20% COL-II were robust, generally spheroidal in shape and 80 ± 10 µm in diameter. MSC viability in microbeads was consistently high over a week in culture, whereas viability in corresponding bulk hydrogels decreased with increasing COL-II content. Osteogenic differentiation of MSC was modestly supported in both AG and AG/COL-II microbeads, whereas adipogenic differentiation was strongly inhibited in COL-II containing microbeads. Chondrogenic differentiation of MSC was clearly promoted in microbeads containing COL-II, compared with pure AG matrices. Conclusions Inclusion of collagen Type II in agarose matrices in microbead format can potentiate chondrogenic differentiation of human MSC. Such compositionally tailored microtissues may find utility for cell delivery in next-generation cartilage repair therapies." @default.
- W2237296816 created "2016-06-24" @default.
- W2237296816 creator A5017163238 @default.
- W2237296816 creator A5035410155 @default.
- W2237296816 creator A5036563674 @default.
- W2237296816 creator A5044948841 @default.
- W2237296816 date "2016-02-01" @default.
- W2237296816 modified "2023-10-15" @default.
- W2237296816 title "Collagen Type II enhances chondrogenic differentiation in agarose-based modular microtissues" @default.
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- W2237296816 doi "https://doi.org/10.1016/j.jcyt.2015.10.015" @default.
- W2237296816 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4724061" @default.
- W2237296816 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26794716" @default.
- W2237296816 hasPublicationYear "2016" @default.
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