中等深度影响人类RPE培养物中的O2可用性和新陈代谢
Daniel T Hass1, Qitao Zhang2, Gillian A Autterson2
1Department of Biochemistry, The University of Washington, Seattle, Washington, United States.
Investigative ophthalmology & visual science
|November 3, 2023
概括
培养基体积显著影响视网膜色素表皮 (RPE) 细胞的氧气供应,影响氧化代谢. 优化介质体积对于准确研究RPE生理学和诸如黄斑变性等疾病至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 代谢研究的研究.
- 视网膜研究 视网膜研究
背景情况:
- 视网膜色素上皮质 (RPE) 的氧化代谢对视网膜功能至关重要.
- 通常在细胞培养系统中研究RPE细胞.
- 传统的培养方法可能不能准确地反映体内条件.
研究的目的:
- 调查培养基体积对RPE培养中的氧气 (O2) 可用性的影响.
- 确定O2限制如何影响RPE氧化代谢和细胞生理.
- 为RPE研究建立最佳培养条件.
主要方法:
- 使用人类原发性和诱导性多能干细胞衍生的RPE培养物.
- 通过缺氧室和媒介体积来操纵氧气的可用性.
- 测量包括氧气消耗率 (OCR),营养流量,HIF-1α稳定性和脂质滴滴分析.
主要成果:
- 通常使用的介质体积会产生低氧状况,限制OCR并改变RPE代谢.
- 缺氧激活HIF-1α,降低乙-CoA的利用率,并增加糖解.
- 代谢变化发生,对标准RPE健康标志物的影响最小.
结论:
- 媒体体积显著影响RPE细胞生理学,尽管对典型健康指标的影响很小.
- 优化的RPE培养条件对于研究与氧化代谢相关的疾病,如与年龄相关的黄斑变性等是必要的.
- 提供了在RPE培养中平衡营养和氧气可用性的指导方针.
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