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- W2169403675 abstract "Investigation of novel experimental application systems for growth factors or other bioactive substances in tissue engineering is often limited by high costs of substances and would benefit from a defined and easily controllable model tissue system. Herein, we demonstrate a potential three-dimensional in vitro system using engineered cartilage as a model tissue and readily available insulin as a model drug. Previously it has been shown that insulin-like growth factor-I (IGF-I) has profound effects on tissue-engineered cartilage in vitro. Insulin is known to bind to the IGF-I receptor and to elicit significant responses in cartilage. In this study, bovine articular chondrocytes were seeded onto biodegradable polyglycolic acid (PGA) scaffolds and cultured for up to 7 weeks. Exogenous insulin (0.05-50 microg/ml) increased the growth rate and the glycosaminoglycan fraction of tissue-engineered cartilage, decreased the cell number in the tissue constructs, and improved the morphological appearance, with 2.5 microg/ml being the most favorable concentration. The observed effects of insulin were similar to effects of IGF-I (0.05 microg/ml) and were in agreement with the reported binding constants of IGF-I and insulin at the IGF-I receptor. Besides the possibility to employ insulin as a potent substance to improve tissue-engineered cartilage, the presented easily controllable in vitro system may be used in the future to evaluate experimental growth factor application devices using economically favorable insulin as a model protein." @default.
- W2169403675 created "2016-06-24" @default.
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- W2169403675 date "2001-01-01" @default.
- W2169403675 modified "2023-09-26" @default.
- W2169403675 title "Insulin in Tissue Engineering of Cartilage: A Potential Model System for Growth Factor Application" @default.
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- W2169403675 doi "https://doi.org/10.3109/10611860108998778" @default.
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