Gulati O D, Sivaramakrishna N
Br J Pharmacol. 1975 Jan;53(1):152-4. doi: 10.1111/j.1476-5381.1975.tb07344.x.
The uptake of exogenously added noradrenaline (NA) (0.5-2.5 mug/ml) by the human umbilical artery was linear with time up to 10 minutes. The uptake was saturable and could be described by the Michaelis-Menten equation. The uptake was cocaine-resistant, normetanephrine-sensitive, was considerably inhibited in the cold and was partially inhibited by Na+- deficiency. Of NA accumulated in the artery 31% could be washed out by NA-free medium. It is concluded that the mechanism of uptake of NA by the human umbilical artery is similar to the uptake2 mechanism.
人脐动脉对外源性添加的去甲肾上腺素(NA)(0.5 - 2.5微克/毫升)的摄取在长达10分钟的时间内与时间呈线性关系。摄取是可饱和的,可用米氏方程描述。摄取对可卡因有抗性,对去甲变肾上腺素敏感,在低温下显著受抑制,且部分受钠缺乏抑制。动脉中积累的NA有31%可被无NA培养基洗脱。结论是人脐动脉摄取NA的机制类似于摄取2机制。