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Tetramethylrhodamine, Methyl Ester, Perchlorate (TMRM)

四甲基罗丹明,甲基酯,高氯酸盐(TMRM)

Company: Thermo Fisher Scientific
Catalog#: T668
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Mitochondrial Transmembrane Potential (ψm) Assay Using TMRM
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2013-12-05
[Abstract]  During cellular respiration, nutrients are oxidized to generate energy through a mechanism called oxidative phosphorylation, which occurs in the mitochondria. During oxidative phosphorylation, the gradual degradation of molecules through the TCA cycle releases electrons from the covalent bonds that are broken. These electrons are captured by NAD+ through its reduction into NADH. Finally, NADH transports the electrons to the complexes of the electron chain in the internal membrane of mitochondria. These complexes use the energy released by the electrons to pump protons into the intermembrane space, generating an electrochemical gradient across the internal membrane of mitochondria, which provides energy for the ATP-synthase complex, ultimately producing adenosine triphosphate (ATP). We ... [摘要]  在细胞呼吸期间,营养物通过称为氧化磷酸化的机制被氧化以产生能量,所述机制发生在线粒体中。在氧化磷酸化过程中,分子通过TCA循环的逐渐降解从被破坏的共价键释放电子。这些电子被NAD +捕获,通过其还原成NADH。最后,NADH将电子传输到线粒体内膜中的电子链的复合物。这些复合物使用由电子释放的能量将质子泵入膜间空间,产生穿过线粒体内膜的电化学梯度,其为ATP-合酶复合物提供能量,最终产生三磷酸腺苷(ATP)。我们使用四甲基罗丹明甲酯(TMRM),一种细胞渗透性,阳离子,红色荧光染料评估线粒体膜电位(ψsub)。为了特异性地测量线粒体膜电位(ψm),我们定量了应用FCCP(线粒体电子链解偶联)之前和之后的荧光强度。应用FCCP之前和之后的强度差异具体对应于线粒体膜电位。我们通过细胞荧光法分析线粒体膜电位(ψm)。信号的总电平与解耦之后产生的信号之间的比率提供了对于单元大小差异的归一化值。此外,为了归一化我们分析的不同大小的细胞,我们已经使用IN细胞分析仪分析了活体成像中的TMRM,使得可以测量每单位线粒体膜面积的线粒体膜电位水平。因此,我们的协议也可以用于比较不同大小的细胞的线粒体膜电位。

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