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Factors influencing the oxygen consumption rate of aortic valve interstitial cells: Application to tissue engineering

机译:影响主动脉瓣间质细胞耗氧率的因素:在组织工程中的应用

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This study investigated the factors influencing the oxygen metabolism of aortic valve interstitial cells (VICs). Porcine VICs in cell suspension at different passages, and adhered to coverslips at different confluencies, as well as fresh porcine valve leaflets, were incubated in an oxygen respiration chamber at 37°C in Dulbecco's modified Eagle's medium. The consumption rates at different oxygen concentrations were evaluated based on the Michaelis-Menten equation, and the corresponding maximum consumption rate (Vmax) and the Michaelis-Menten equation constant Km were determined. In all cases, the oxygen consumption rate was relatively constant until the concentration dropped to 5% (v/v). The metabolic activity of VICs in terms of oxygen consumption was dependent upon their in vitro passage number and proliferation status. These findings will provide valuable input to the selection of VICs with respect to their age and proliferation status for tissue engineering applications, as well as important input parameters for developing computational models of oxygen transport and optimization of the bioreactor conditions for heart valve tissue engineering.
机译:这项研究调查了影响主动脉瓣间质细胞(VICs)氧代谢的因素。细胞悬浮液中的猪VICs在不同的传代时间,并以不同的汇合度粘附在盖玻片上,以及新鲜的猪瓣膜小叶,在37°C的氧气呼吸室中于Dulbecco改良的Eagle培养基中孵育。根据Michaelis-Menten方程评估不同氧气浓度下的消耗率,并确定相应的最大消耗率(Vmax)和Michaelis-Menten方程常数Km。在所有情况下,耗氧率都相对恒定,直到浓度下降到5%(v / v)。根据耗氧量,VIC的代谢活性取决于其体外传代次数和增殖状态。这些发现将为VIC的年龄和增殖状态的选择提供有价值的输入,以用于组织工程应用,以及为开发氧气传输计算模型和优化心脏瓣膜组织工程的生物反应器条件提供重要的输入参数。

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