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首页> 外文期刊>Journal of the Society for Gynecologic Investigation >Effects of polyamines on human umbilical artery tone in vitro.
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Effects of polyamines on human umbilical artery tone in vitro.

机译:多胺对体外人脐动脉张力的影响。

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OBJECTIVE: Polyamines act as endogenous modulators of cell function and excitability. There are no data in relation to their effects on the human fetoplacental circulation. The aim of this study was to investigate the effects of the polyamines, spermine, and spermidine on human umbilical artery resistance in vitro. METHODS: Isometric tension recordings were performed under physiologic conditions on human umbilical arterial rings (n = 12). The in vitro effects of spermine and spermidine (at concentrations ranging between 10(-9) M to 10(-3) M) were measured, and compared with those measured in vehicle control experiments. The maximal inhibition (MMI) at the highest concentration and the pD(2) (-log EC(50)) values for each compound were calculated and compared. RESULTS: Spermine and spermidine exerted a potent relaxant effect on human umbilical arterial tone in comparison to vehicle control experiments. The MMI +/- SEM for spermine was 18.41 +/- 1.437% (n = 6; P <.001) and for spermidine was 38.31 +/- 3.572% (n = 6; P <.001). There was no difference observed between the pD(2) +/- SEM values for spermine (5.78 +/- 1.54; n = 6) and spermidine (6.27 +/-0.85; n = 6) (P = .517). CONCLUSION: The polyamines spermine and spermidine exert a potent relaxant effect on human umbilical artery tone suggestive of an endogenous role for these compounds in vasomotor regulation of the fetoplacental circulation.
机译:目的:多胺是细胞功能和兴奋性的内源性调节剂。没有关于它们对人类胎盘循环的影响的数据。这项研究的目的是研究多胺,亚精胺和亚精胺在体外对人脐动脉阻力的影响。方法:在生理条件下对人脐动脉环(n = 12)进行等距张力记录。测量了精胺和亚精胺的体外作用(浓度范围在10(-9)M至10(-3)M之间),并与媒介物对照实验中的结果进行了比较。计算并比较了每种化合物在最高浓度下的最大抑制(MMI)和pD(2)(-log EC(50))值。结果:与媒介物对照实验相比,精胺和亚精胺对人脐动脉张力具有有效的松弛作用。精胺的MMI +/- SEM为18.41 +/- 1.437%(n = 6; P <.001),亚精胺的MMI +/- SEM为38.31 +/- 3.572%(n = 6; P <.001)。精胺的pD(2)+/- SEM值(5.78 +/- 1.54; n = 6)和亚精胺(6.27 +/- 0.85; n = 6)之间没有差异(P = .517)。结论:多胺精胺和亚精胺对人的脐动脉张力具有强力的松弛作用,提示这些化合物在胎儿胎盘循环的血管舒缩调节中具有内源性作用。

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