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Deltorphin transport across the blood-brain barrier

机译:Deltorphin通过血脑屏障的转运

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摘要

In vivo antinociception studies demonstrate that deltorphins are opioid peptides with an unusually high blood-brain barrier penetration rate. In vitro, isolated bovine brain microvessels can take up deltorphins through a satu- rable nonconcentrative permeation system, which is appar- ently distinct from previously described systems involved in the transport of neutral amino acids or of enkephalins. Removing Na~+ ions from the incubation medium decreases the carrier affinity for deltorphins (-25/100), but does not affect the V_max value of the transport.
机译:体内抗伤害感受研究表明,德尔托芬是具有异常高的血脑屏障穿透率的阿片类肽。在体外,离体的牛脑微血管可以通过可饱和的非浓缩渗透系统吸收三聚吗啡,该系统显然不同于先前描述的涉及中性氨基酸或脑啡肽运输的系统。从孵育介质中除去Na〜+离子会降低载体对deltorphins的亲和力(-25/100),但不会影响转运蛋白的V_max值。

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