荧光探针包被法测定血浆硫化氢浓度(英文)
发布时间:2018-08-03 22:05
【摘要】:目的:在荧光探针的基础上建立一种简易的方法来检测血液中的硫化氢(hydrogen sulfide,H2S)。方法:将荧光探针包被到96孔板上,冷藏待用。用饱和硫酸铵沉淀血浆或血清中的蛋白,离心后所得的上清液分别加到含包被探针和不含包被探针的微孔中,37℃避光孵育2 h,然后使用分光光度计(波长λEx/λEm340/445 nm)读取微孔的荧光值,计算包被有探针和相应无探针微孔的荧光差值,根据标准曲线浓度计算出血液中H2S的浓度。结果:灵敏度和特异性测试表明,此方法检测灵敏度下限可以达到0.3μmol/L,血液中其他成分甚至其他含硫活性成分和含硫氨基酸等对此方法影响甚微。应用此方法检测188名健康成年志愿者的血清H2S浓度[(12.1±3.5)μmol/L,95%CI:4.6~19.8μmol/L],所得结果呈正态分布(单样本K-S检验,P0.1)。对30名高血压患者和22名相匹配的健康志愿者血清H2S浓度检测表明,前者H2S浓度低于后者[(3.52±1.49)μmol/L vs.(10.23±2.76)μmol/L],差异具有统计学意义(配对样本t检验,t=9.937,P0.001)。检测雄性Wistar大鼠血清[(19.66±2.32)μmol/L]和血浆[(18.67±2.07)μmol/L]以及动脉血[(19.34±0.51)μmol/L]和静脉血[(18.99±0.50)μmol/L]中的H2S浓度,结果表明雄性Wistar大鼠血清和血浆以及动脉血和静脉血两者差异都没有统计学意义(重复测量的方差分析,P=0.38)。样品的重复性检测稳定性较好(两因素方差分析,P0.05)。结论:此方法对检测血液中的H2S具有简单、高灵敏度、特异性和可重复性等优点,出结果快,可适用于大样本的高通量检测,满足实验室基础研究及临床一次性大样本H2S浓度检测的需求。
[Abstract]:Objective: to establish a simple method for the detection of hydrogen sulfide H2S in blood on the basis of fluorescence probe. Methods: the fluorescent probe was coated on 96 hole plate and stored in cold storage. Precipitation of proteins in plasma or serum with saturated ammonium sulfate, After centrifugation, the supernatant was added to the micropore containing and without the coated probe for 2 h at 37 鈩,
本文编号:2163129
[Abstract]:Objective: to establish a simple method for the detection of hydrogen sulfide H2S in blood on the basis of fluorescence probe. Methods: the fluorescent probe was coated on 96 hole plate and stored in cold storage. Precipitation of proteins in plasma or serum with saturated ammonium sulfate, After centrifugation, the supernatant was added to the micropore containing and without the coated probe for 2 h at 37 鈩,
本文编号:2163129
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