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首页> 外文期刊>Journal of materials science >Overcoming hypoxia in 3D culture systems for tissue engineering of bone in vitro using an automated, oxygen-triggered feedback loop
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Overcoming hypoxia in 3D culture systems for tissue engineering of bone in vitro using an automated, oxygen-triggered feedback loop

机译:使用自动氧气触发的反馈回路克服3D培养系统中用于骨骼组织工程的缺氧

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摘要

Tissue engineering is an attractive approach to heal bony defects. However, three-dimensional cell-scaffold constructs display uneven oxygen supply resulting in inhomogeneous tissue quality. We assessed different strategies to improve oxygen supply in vitro. Scaffolds with differing inner surface were seeded with preosteob-lastic cells and cultivated either statically or in perfusion bioreactors. Oxygen concentration and pH were measured in the center of the scaffolds. An inductive feedback mechanism was build to increase bioreactor pump speed according to the oxygen concentrations measured within the scaffolds. While pH remained stable, oxygen concentration decreased significantly under static conditions within the cell-seeded scaffolds. Reducing the scaffolds' inner surface as well as increasing perfusion speeds in bioreactors resulted in improved oxygen supply. We conclude that improving oxygen supply to three dimensional culture systems for bone tissue engineering is feasible in an automated manner. Culture conditions have to be adapted to each cell-scaffold system individually.
机译:组织工程学是治疗骨缺损的一种有吸引力的方法。然而,三维细胞支架结构显示出不均匀的氧气供应,导致组织质量不均匀。我们评估了改善体外供氧的不同策略。将具有不同内表面的支架接种成骨前体-弹性细胞,并在静态或灌注生物反应器中进行培养。在支架中央测量氧气浓度和pH。建立了感应反馈机制,以根据支架内测得的氧气浓度提高生物反应器的泵速。虽然pH保持稳定,但在接种细胞的支架中的静态条件下,氧浓度显着下降。减少支架的内表面以及提高生物反应器的灌注速度可改善氧气供应。我们得出结论,以自动化的方式改善为骨组织工程的三维培养系统的氧气供应是可行的。培养条件必须分别适应每个细胞支架系统。

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  • 来源
    《Journal of materials science》 |2012年第11期|2793-2801|共9页
  • 作者单位

    Department of Surgery, Experimental Surgery and Regenerative Medicine, Ludwig-Maximilians-University Munich, Nussbaumstr. 20, 80336 Munich, Germany;

    Department of Oral and Maxillofacial Surgery, Ludwig-Maximilians-University, Lindwurmstr. 2a, 80337 Munich, Germany;

    Department of Surgery, Experimental Surgery and Regenerative Medicine, Ludwig-Maximilians-University Munich, Nussbaumstr. 20, 80336 Munich, Germany;

    Department of Surgery, Experimental Surgery and Regenerative Medicine, Ludwig-Maximilians-University Munich, Nussbaumstr. 20, 80336 Munich, Germany,Faculty of Precision- and Micro-Engineering, Engineering Physics, University of Applied Sciences, Munich, Germany;

    Department of Surgery, Experimental Surgery and Regenerative Medicine, Ludwig-Maximilians-University Munich, Nussbaumstr. 20, 80336 Munich, Germany;

    Department of Surgery, Experimental Surgery and Regenerative Medicine, Ludwig-Maximilians-University Munich, Nussbaumstr. 20, 80336 Munich, Germany;

    BioCer Entwicklungs-GmbH, Ludwig-Thoma-Str. 36c, 95440 Bayreuth, Germany;

    BioCer Entwicklungs-GmbH, Ludwig-Thoma-Str. 36c, 95440 Bayreuth, Germany,Friedrich-Baur-Research Institute for Biomaterials, University of Bayreuth, Ludwig-Thoma-Str. 36c, 95447 Bayreuth, Germany;

    Tutogen Medical, Industriestrasse 6, 91077 Neunkirchen am Brand, Germany;

    Department of Surgery, Experimental Surgery and Regenerative Medicine, Ludwig-Maximilians-University Munich, Nussbaumstr. 20, 80336 Munich, Germany;

    Department of Surgery, Experimental Surgery and Regenerative Medicine, Ludwig-Maximilians-University Munich, Nussbaumstr. 20, 80336 Munich, Germany;

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