Abstract
High-serum media have been shown to produce significant improvement in the properties of tissue-engineered articular cartilage when applied in combination with dynamic deformational loading. To mitigate concerns regarding the culture variability introduced by serum, we examined the interplay between low-serum/ITS-supplemented media and dynamic deformational loading. Our results show that low serum/ITS supplementation does not support the same level of tissue formation as compared to high serum controls. In free-swelling culture, using a combination of ITS with concentrations of FBS above 2% negated the beneficial effects of ITS. Although there were beneficial effects with loading and 0.2%FBS + ITS, these constructs significantly underperformed relative to 20%FBS constructs. At 2%FBS + ITS, the free-swelling construct stiffness and composition approached or exceeded that of 20%FBS constructs. With dynamic loading, the properties of 2%FBS + ITS constructs were significantly lower than free-swelling controls and 20%FBS constructs by day 42. By priming the chondrocytes in 20%FBS prior to exposure to low-serum/ITS media, we observed that low-serum/ITS media produced significant enhancement in tissue properties compared to constructs grown continuously in 20%FBS.
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This work was supported by the National Institutes of Health [R01 AR46568 (CTH), R01 AR49922 (CTH), R03 AR053668 (RLM), and a graduate research supplement (TNK)].
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Kelly, TA., Fisher, M., Oswald, E. et al. Low-Serum Media and Dynamic Deformational Loading in Tissue Engineering of Articular Cartilage. Ann Biomed Eng 36, 769–779 (2008). https://doi.org/10.1007/s10439-008-9476-1
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DOI: https://doi.org/10.1007/s10439-008-9476-1