Detection of malondialdehyde in vivo using microdialysis sampling with CE-fluorescence.

Detection of malondialdehyde in vivo using microdialysis sampling with CE-fluorescence.
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DOI:
10.1002/elps.201100143
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发表时间:
2011-11
期刊:
影响因子:
2.9
通讯作者:
Lunte, Craig Edward
Lunte, Craig Edward
中科院分区:
生物学3区
文献类型:
--
作者:
Cooley, Justin Carl;Lunte, Craig Edward

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氧化损伤是一种自然发生的过程,其中活性氧(ROS)攻击并破坏正常的细胞功能,然而,这些作用在应激事件(例如缺血/再灌注或癫痫发作)期间变得升高。氧化应激的一个结果是脂质过氧化,其中ROS攻击游离的不饱和脂肪酸形成脂质过氧化氢,然后脂质过氧化氢分解形成次级产物丙烯醛、4-羟基壬烯醛和丙二醛(MDA),导致不可逆的膜损伤并最终导致细胞死亡。本文介绍了一种结合体内微透析取样测定MDA的CE -荧光法。在酸性条件下用硫代巴比妥酸衍生MDA 20分钟,并直接注射到毛细管上,无需任何预处理。该方法的检测限为25 nM(S/N = 3),线性范围为25-2400 nM(1.8-174 ng/ml)。该方法用于定量大鼠心脏、肌肉、肝脏和脑透析液中的MDA。
Oxidative damage is a naturally occurring process where reactive oxygen species (ROS) attack and disrupt normal cellular function, however, these effects become elevated during a stress event, such as ischemia/reperfusion or seizure. One result of oxidative stress is lipid peroxidation, where ROS attack free unsaturated fatty acids forming lipid hydorperoxides, which then breakdown to form secondary products acrolein, 4-hydroxynonenal, and malondialdehyde (MDA) resulting in irreversible membrane damage and ultimately cell death. Described here is a CE – fluorescence method for the determination of MDA in conjunction with in vivo microdialysis sampling. MDA was derivatized with thiobarbituric acid under acidic conditions for 20 minutes and injected directly onto the capillary without any pretreatment. This method provided a limit of detection of 25 nM (S/N = 3) and a linear range of 25-2400 nM (1.8-174 ng/ml). This method was used to quantify MDA in rat heart, muscle, liver, and brain dialysate.
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发表时间: 2009-01-01
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影响因子: --
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