A modified assay method for determining serotonin uptake in human platelets.

A modified assay method for determining serotonin uptake in human platelets.
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一种测定人血小板中血清素摄取的改良测定方法。

DOI:
10.1016/0009-8981(81)90381-8
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发表时间:
1981
期刊:
Clinica chimica acta; international journal of clinical chemistry
影响因子:
--
通讯作者:
Meltzer,HY
Meltzer,HY
中科院分区:
--
文献类型:
--
作者:
Arora,RC;Meltzer,HY

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本文研究了各种实验条件对人血小板摄取5-羟色胺(5-HT)的影响。实验设计允许的扩散和其他非饱和过程的亲和力和最大活性的膜泵的5-HT摄取的效果进行评估。通过将富血小板血浆(PRP)与浓度递增的5-羟色胺在37° C下孵育4 min测定总5-HT摄取。通过在37°C下向PRP缓冲液中加入不同浓度的5-HT,然后立即转移至冰冷水浴中测定被动摄取。血小板5-HT主动摄取的亲和力(Km)为0.45 ± 0.09 μ mol/,最大摄取速率(V)为10.7 ± 2.1pmol/107血小板/min。讨论了被动扩散对动力学参数的影响。
Effects of various experimental conditions on serotonin (5-HT) uptake in human platelets were examined. The experimental design allowed the evaluation of the effect of diffusion and other non-saturable processes on the affinity and maximum activity of the membrane pump for 5-HT uptake. Total 5-HT uptake was determined by incubating platelet-rich plasma (PRP) with increasing concentrations of serotonin at 37°C for 4 min. The passive uptake was measured by the addition of various 5-HT concentrations to PRP in buffer at 37°C, followed by immediate transfer to an ice-cold water bath. The difference between the total and passive uptake was linear for 6 min. The affinity (Km) for active platelet serotonin uptake was 0.45 ± 0.09γmol/land maximal rate of uptake (V) was 10.7 ± 2.1 pmol/107platelets/min. The described method provides a convenient and reliable measure of active 5-HT uptake suitable for clinical investigation. The effect of passive diffusion on kinetic parameters is discussed.
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