Clinica Chimica Acta:采用新型LC-MS/MS法测定脓毒症休克时血浆缓激肽浓度

2019-08-06 Gladiator MedSci原创

缓激肽是炎症和血管通透性的重要介质,在感染性休克的发生过程中可能发挥重要作用。然而,采用免疫学方法测定缓激肽可能受到干扰,且缺乏特异性。因此本研究建立了血浆缓激肽的液相色谱<span lang="EN-US" style="font-size:12.0pt;mso-bidi-font-size:14.0pt;font-family:&quot;Calibri&quot;,&quot;sans-se

缓激肽是炎症和血管通透性的重要介质,在感染性休克的发生过程中可能发挥重要作用。然而,采用免疫学方法测定缓激肽可能受到干扰,且缺乏特异性。因此本研究建立了血浆缓激肽的液相色谱-质谱分析方法(LC-MS/MS)

研究人员使用健康志愿者 (n=19)和脓毒性休克患者(n=47) 血浆样本。在固相萃取和LC-MS/MS定量前,将稳定同位素缓激肽内标加入样品中。对缓激肽的稳定性连续研究 12个月。

研究结果显示,本研究分析具有良好的灵敏度(0.1nmol / l)和宽线性范围(0.1-1000nmol / l)。当在取样时加入蛋白酶抑制剂的混合物但在反复冷冻和解冻期间降解时,添加到血浆中的缓激肽在-20下稳定12个月。 感染性休克患者(<0.1-0.6nmol / l)血浆中的缓激肽浓度在休克和恢复期间没有显着变化,但与健康个体(0.5-1.1nmol / l)略有不同。

研究表明,本研究中的缓激肽实验成功地用于测定血浆中缓激肽的浓度。重症监护病房感染性休克患者在休克期和恢复期血浆缓激肽浓度均较低。

原始出处:

Mikael LindströmMiia ValkonenPlasma bradykinin concentrations during septic shock determined by a novel LC-MS/MS assay

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