Natural Compounds Modulating Mitochondrial Functions.

Natural Compounds Modulating Mitochondrial Functions.
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DOI:
10.1155/2015/527209
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发表时间:
2015
期刊:
Evidence-based complementary and alternative medicine : eCAM
影响因子:
--
通讯作者:
Pinti M
Pinti M
中科院分区:
其他
文献类型:
--
作者:
Gibellini L;Bianchini E;De Biasi S;Nasi M;Cossarizza A;Pinti M

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线粒体是负责几种关键细胞功能的细胞器,包括呼吸、氧化磷酸化和细胞凋亡的调节;它们也是活性氧(ROS)的主要细胞内来源。在过去的几年中,一个特别的兴趣一直致力于研究植物来源的天然化合物对线粒体的影响,槲皮素(Qu),白藜芦醇(RSV)和姜黄素(Cur)是研究最多的分子。所有这些天然化合物通过抑制细胞器酶或代谢途径(如氧化磷酸化)、通过改变线粒体ROS的产生以及通过调节调节线粒体蛋白质表达的转录因子的活性来调节线粒体功能。虽然Qu显示出促和抗氧化活性,但RSV和Cur是强抗氧化剂,因为它们有效地抑制线粒体ROS并上调细胞中的抗氧化剂转录程序。所有这三种化合物都显示出促凋亡活性,其通过直接引起细胞色素c从线粒体释放的能力或通过上调Bcl-2家族的促凋亡蛋白的表达和下调抗凋亡蛋白而间接介导。有趣的是,这些作用在增殖的癌细胞上特别明显,并且可以具有重要的治疗意义。
Mitochondria are organelles responsible for several crucial cell functions, including respiration, oxidative phosphorylation, and regulation of apoptosis; they are also the main intracellular source of reactive oxygen species (ROS). In the last years, a particular interest has been devoted to studying the effects on mitochondria of natural compounds of vegetal origin, quercetin (Qu), resveratrol (RSV), and curcumin (Cur) being the most studied molecules. All these natural compounds modulate mitochondrial functions by inhibiting organelle enzymes or metabolic pathways (such as oxidative phosphorylation), by altering the production of mitochondrial ROS and by modulating the activity of transcription factors which regulate the expression of mitochondrial proteins. While Qu displays both pro- and antioxidant activities, RSV and Cur are strong antioxidant, as they efficiently scavenge mitochondrial ROS and upregulate antioxidant transcriptional programmes in cells. All the three compounds display a proapoptotic activity, mediated by the capability to directly cause the release of cytochrome c from mitochondria or indirectly by upregulating the expression of proapoptotic proteins of Bcl-2 family and downregulating antiapoptotic proteins. Interestingly, these effects are particularly evident on proliferating cancer cells and can have important therapeutic implications.
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