Sphingolipid abnormalities in cancer multidrug resistance: Chicken or egg?

Sphingolipid abnormalities in cancer multidrug resistance: Chicken or egg?
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DOI:
10.1016/j.cellsig.2017.06.017
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发表时间:
2017-10
影响因子:
4.8
通讯作者:
Kolesnick RN
Kolesnick RN
中科院分区:
生物学2区
文献类型:
--
作者:
Lee WK;Kolesnick RN

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癌症多药耐药性(MDR)表型涵盖了由进行性致癌转化和选择引起的无数分子、遗传和细胞改变。药物流出转运蛋白,特别是 MDR P-糖蛋白 ABCB1,在 MDR 中发挥重要作用,但不能单独赋予完整的表型,表明平行改变是先决条件。鞘脂是脂筏结构域的重要组成部分,直接参与跨膜蛋白的功能化,包括为多药物转运蛋白提供最佳的脂质微环境,并且在癌症中也受到干扰。在这里,我们假设在某些癌症早期发展的鞘磷脂含量增加,募集质膜 ABCB1 并使其功能化,从而赋予部分 MDR 状态,这是通过鞘糖脂紊乱和细胞内囊泡 ABCB1 的出现来完成的。在这篇综述中,讨论了转化过程中鞘脂改变和 ABCB1 上调的独立和相互依赖的作用以及由此产生的部分和完整 MDR 表型。
The cancer multidrug resistance (MDR) phenotype encompasses a myriad of molecular, genetic and cellular alterations resulting from progressive oncogenic transformation and selection. Drug efflux transporters, in particular the MDR P-glycoprotein ABCB1, play an important role in MDR but cannot confer the complete phenotype alone indicating parallel alterations are prerequisite. Sphingolipids are essential constituents of lipid raft domains and directly participate in functionalization of transmembrane proteins, including providing an optimal lipid microenvironment for multidrug transporters, and are also perturbed in cancer. Here we postulate that increased sphingomyelin content, developing early in some cancers, recruits and functionalizes plasma membrane ABCB1 conferring a state of partial MDR, which is completed by glycosphingolipid disturbance and the appearance of intracellular vesicular ABCB1. In this review, the independent and interdependent roles of sphingolipid alterations and ABCB1 upregulation during the transformation process and resultant conferment of partial and complete MDR phenotypes are discussed.
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