简单的3D打印动生物反应器通过改进的氧化增强视网膜器官生产.
Kyle H Schwab1,2, Philsang Hwang3, Ki Yoon Nam1
1Neurobiology, Neurodegeneration & Repair Laboratory, National Eye Institute, National Institutes of Health, Bethesda, MD, USA.
bioRxiv : the preprint server for biology
|July 16, 2025
概括
静态培养会导致视网膜器官 (RO) 的缺氧,阻碍发展. 一种新的3D打印生物反应器 (SBR) 维持生理氧气,提高RO产量,质量和一致性.
科学领域:
- 干细胞生物学 干细胞生物学
- 发育生物学是发展生物学.
- 生物技术是生物技术.
背景情况:
- 来自人类多能干细胞 (hPSC) 的视网膜器官 (RO) 模型视网膜发育和疾病.
- 目前的静态培养方法导致RO产量和质量因批量变化而不一致.
- 静态培养可能会产生不利于分化细胞的非生理性缺氧条件.
研究的目的:
- 为了研究氧气水平对视网膜器官分化的影响.
- 开发一种方法,在RO培养过程中维持生理氧气水平.
- 提高RO生产的一致性和质量.
主要方法:
- 在RO分化过程中,在静态培养中测量溶解氧水平.
- 开发和实施用于RO培养的3D打印混合生物反应器 (SBR).
- 在不同的氧气条件下评估有机物产量,质量和细胞活力.
主要成果:
- 静态培养迅速诱导严重缺氧 (<1%的氧气) 在媒介变化的几个小时内.
- 缺氧导致光囊退化,缺氧标记物表达增加和细胞亡.
- SBR保持了生理氧气水平 (~4-6%),显著提高了RO产量,质量和可重复性.
结论:
- 非生理性缺氧是一种关键的,以前未被识别的因素,限制了RO生产的一致性和质量.
- 新型SBR平台有效减轻缺氧,使可靠和改进的RO产生成为可能.
- 这种方法提供了一个可扩展的解决方案,用于研究和治疗应用,持续生产高质量的视网膜器官.
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