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首页> 外文期刊>Journal of Neuroscience Methods >An in vitro rabbit retina model to study electrophysiologic and metabolic function during and following ischemia.
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An in vitro rabbit retina model to study electrophysiologic and metabolic function during and following ischemia.

机译:一种体外兔视网膜模型,用于研究缺血期间和缺血后的电生理和代谢功能。

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摘要

Most in vitro studies involving neuronal ischemia use biochemical measures and/or cell counting to assess cellular death. We describe an in vitro rabbit retina model in which we measured glucose utilization, lactate production, and light-evoked compound action potentials (CAPs) to assess metabolic and functional recovery following ischemia. Under control conditions, retinal glucose utilization and lactate production (n = 7), as well as CAPs (n = 8) remained quite constant for 6-8 h. During ischemia (glucose reduced from 6 to 1 mM and oxygen from 95 to 15%), glucose utilization and lactate production fell to 50%. CAPs fell to 50% in 3-4 min, and to 0% in 8-10 min. Recovery during 3-4 h of 'return-to-control' was dependent upon the length of ischemia. Glucose utilization recovered to 63% after 1 h (n = 4) and to 18% after 2 h of ischemia (n = 6, P < 0.001). Lactate production recovered to 77% after 1 h (n = 4) and to 54% after 2 h of ischemia (n = 6, P < 0.001). CAPs returned to 51, 15, and 0.13% of the control responses after 0.5 h (n = 7), 1 h (n = 8), and 2 h (n = 5) of ischemia, respectively (P < 0.001). This avascular, blood-brain barrier-free preparation provides an opportunity to use both metabolic and functional criteria to test protection against neuronal ischemia.
机译:大多数涉及神经元缺血的体外研究都使用生物化学方法和/或细胞计数来评估细胞死亡。我们描述了体外兔视网膜模型,其中我们测量了葡萄糖的利用,乳酸的产生和光诱发的复合动作电位(CAPs)以评估缺血后的代谢和功能恢复。在对照条件下,视网膜葡萄糖利用率和乳酸产量(n = 7)以及CAPs(n = 8)在6-8小时内保持相当恒定。在缺血期间(葡萄糖从6降低到1 mM,氧气从95降低到15%),葡萄糖利用率和乳酸产量降低到50%。 CAP在3-4分钟内降至50%,在8-10分钟内降至0%。 “恢复控制” 3-4小时内的恢复取决于缺血时间。葡萄糖利用率在1小时后恢复到63%(n = 4),在缺血2小时后恢复到18%(n = 6,P <0.001)。乳酸生成量在1小时后恢复到77%(n = 4),在缺血2小时后恢复到54%(n = 6,P <0.001)。在缺血0.5 h(n = 7),1 h(n = 8)和2 h(n = 5)后,CAPs分别返回对照反应的51%,15%和0.13%(P <0.001)。这种无血管,无血脑屏障的制剂提供了使用代谢和功能标准来测试针对神经元缺血的保护的机会。

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