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首页> 外文期刊>Journal of biochemical and molecular toxicology >Ornithine decarboxylase prevents dibenzoylmethane-induced apoptosis through repressing reactive oxygen species generation.
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Ornithine decarboxylase prevents dibenzoylmethane-induced apoptosis through repressing reactive oxygen species generation.

机译:鸟氨酸脱羧酶通过抑制活性氧的生成来防止二苯甲酰甲烷诱导的细胞凋亡。

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摘要

Dibenzoylmethane (DBM) belongs to the flavonoid family and is a minor constituent of the root extract of licorice and the beta-diketone analogue of curcumin. It exhibits antimutagenic, anticancer, and chemopreventive effects. Ornithine decarboxylase (ODC), the rate-limiting enzyme of the polyamine biosynthetic pathway, plays an important role in growth, proliferation, and transformation. Our previous studies showed ODC overexpression prevented etoposide-, paclitaxel-, and cisplatin-induced apoptosis. Here, we investigated one mechanism of DBM-induced apoptosis and the antiapoptotic effects of ODC during DBM treatment. We found that DBM induced apoptosis, promoted reactive oxygen species (ROS) generation, and disrupted the mitochondrial membrane potential (Deltapsi(m). N-acetylcysteine, a ROS scavenger, reduced DBM-induced apoptosis, which led to the loss of Deltapsi(m) due to reduced ROS. Overexpression of ODC in parental cells had the same effects as the ROS scavenger. The results demonstrated that DBM-induced apoptosis was a ROS-dependent pathway and ODC overexpression blocked DBM-induced apoptosis by inhibiting intracellular ROS production.
机译:二苯甲酰甲烷(DBM)属于类黄酮家族,是甘草根提取物和姜黄素的β-二酮类似物的次要成分。它具有抗诱变,抗癌和化学预防作用。鸟氨酸脱羧酶(ODC)是多胺生物合成途径的限速酶,在生长,增殖和转化中起着重要作用。我们以前的研究表明,ODC的过量表达阻止了依托泊苷,紫杉醇和顺铂诱导的细胞凋亡。在这里,我们调查了DBM诱导凋亡和ODC在DBM治疗过程中的抗凋亡作用的一种机制。我们发现DBM诱导凋亡,促进活性氧(ROS)生成,并破坏线粒体膜电位(Deltapsi(m)。ROS清除剂N-乙酰半胱氨酸减少DBM诱导的凋亡,从而导致Deltapsi( m)由于ROS减少,亲本细胞中ODC的过表达与ROS清除剂具有相同的作用,结果表明DBM诱导的细胞凋亡是ROS依赖的途径,ODC的过表达通过抑制细胞内ROS的产生来阻断DBM诱导的细胞凋亡。

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