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Dulbecco's Modified Eagle's medium (1 g/L D-glucose) (LG-DMEM)

Company: Thermo Fisher Scientific
Catalog#: 11885-084
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Spectrophotometric Assessment of Heme Oxygenase-1 Activity in Leishmania-infected Macrophages
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2020-04-05
[Abstract]  Heme oxygenase-1 (HO-1) is a stress responsive enzyme that metabolizes heme and releases free iron, carbon monoxide (CO), and biliverdin (BV), which rapidly undergoes conversion to bilirubin (BL). Estimation of bilirubin is the basis of HO-1 assay. HO-1 activity is widely employed to determine antioxidant response of cells under different physiological stress environment. Intra-macrophage infection often acts as such a stress inducer and measurement of HO-1 activity in infected cells indicates the ability of pathogens towards modulating oxidative response of host. The present protocol describes analysis of HO-1 activity in infected macrophages by spectrophotometric method, which is much less complex and therefore advantageous over other methods like high-performance liquid chromatography, ... [摘要]  [摘要] 血红素氧合酶-1 (HO-1)是一种应激反应酶,它能代谢血红素并释放出游离的铁,一氧化碳(CO )和胆绿素(BV),并迅速转变为胆红素(BL)。胆红素的估计是HO-1测定的基础。HO-1活性被广泛用于确定在不同生理压力环境下细胞的抗氧化反应。巨噬细胞内感染通常是压力的诱因和测量方法 被感染细胞中HO-1活性的变化表明病原体具有调节宿主氧化反应的能力。本协议描述了通过分光光度法分析感染的巨噬细胞中HO-1活性的方法,该方法不那么复杂,因此比其他方法(例如高效液相色谱法,放射化学方法和通过气相色谱法检测CO)更具优势。主要步骤包括:(1)制备含有HO-1的巨噬细胞微粒级分(2)分离含有biliverdin还原酶的大鼠肝胞质级分,以及(3)通过分光光度法检测胆红素来评估血红素加氧酶-1活性。该方法提供了一种简单而灵敏的方法来测量感染条件下的细胞抗氧化反应。

[背景] 活性氧(ROS)是抵抗巨噬细胞入侵病原体的主要宿主防御武器之一(Missall 等,2004)。另一方面,巨噬细胞内的病原体由于其在巨噬细胞内的成功持久而中和了早期的氧化爆发(Paiva和Bozza,2014年)。为了应对这种氧化压力,生物可以部署宿主细胞的抗氧化酶,例如超氧化物歧化酶(SOD),过氧化氢酶(CAT)谷胱甘肽过氧化物酶(GPX)和血红素加氧酶-1(HO-1)来清除ROS ...

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