Select dietary phytochemicals function as inhibitors of COX-1 but not COX-2.

Select dietary phytochemicals function as inhibitors of COX-1 but not COX-2.
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DOI:
10.1371/journal.pone.0076452
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Dong Z
Dong Z
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Li H;Zhu F;Sun Y;Li B;Oi N;Chen H;Lubet RA;Bode AM;Dong Z

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最近的临床试验引起了人们对选择性环氧合酶-2(考克斯-2)抑制剂心血管毒性的关注。据报道,许多活性饮食因子通过靶向考克斯-2来抑制致癌作用。因此,一个主要的问题是:为什么终身使用可能抑制考克斯-2的植物化学物质可能与不良心血管副作用无关。为了回答这个问题,我们选择了一个库的饮食来源的植物化学物质,并评估其潜在的心血管毒性在人脐静脉内皮细胞。我们的数据表明,这些膳食植物化学品的心血管毒性的可能性很低。进一步的机制研究表明,这些植物化学物质的作用类似于阿司匹林,因为它们主要抑制考克斯-1而不是考克斯-2,特别是在低剂量下。
Recent clinical trials raised concerns regarding the cardiovascular toxicity of selective cyclooxygenase-2 (COX-2) inhibitors. Many active dietary factors are reported to suppress carcinogenesis by targeting COX-2. A major question was accordingly raised: why has the lifelong use of phytochemicals that likely inhibit COX-2 presumably not been associated with adverse cardiovascular side effects. To answer this question, we selected a library of dietary-derived phytochemicals and evaluated their potential cardiovascular toxicity in human umbilical vein endothelial cells. Our data indicated that the possibility of cardiovascular toxicity of these dietary phytochemicals was low. Further mechanistic studies revealed that the actions of these phytochemicals were similar to aspirin in that they mainly inhibited COX-1 rather than COX-2, especially at low doses.
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