Niemann-Pick C2 (NPC2) and intracellular cholesterol trafficking.

Niemann-Pick C2 (NPC2) and intracellular cholesterol trafficking.
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DOI:
10.1016/j.bbalip.2009.02.001
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发表时间:
2009-07
期刊:
Biochimica et biophysica acta
影响因子:
--
通讯作者:
Xu Z
Xu Z
中科院分区:
其他
文献类型:
--
作者:
Storch J;Xu Z

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胆固醇是许多生物活性分子的重要前体,并且其在膜结构和功能中起主要作用。胆固醇可以通过内吞囊泡系统内源性合成或外源性吸收,随后递送到内吞后/溶酶体位点,包括质膜和内质网。尼曼-匹克C(NPC)病导致外源性胆固醇以及其他脂质在晚期内体和溶酶体(LE/LY)中积累。NPC疾病的两个基础基因NPC 1和NPC 2的鉴定已经将注意力集中在脂质(特别是胆固醇)从LE/LY隔室转运出来的机制上。本文综述了NPC 2蛋白在胆固醇转运中的作用,以及NPC 1和NPC 2在调节正常细胞内胆固醇稳态中的协同作用。
Cholesterol is an important precursor for numerous biologically active molecules, and it plays a major role in membrane structure and function. Cholesterol can be endogenously synthesized or exogenously taken up via the endocytic vesicle system and subsequently delivered to post-endo/lysosomal sites including the plasma membrane and the endoplasmic reticulum. Niemann–Pick C (NPC) disease results in the accumulation of exogenously-derived cholesterol, as well as other lipids, in late endosomes and lysosomes (LE/LY). Identification of the two genes that underlie NPC disease, NPC1 and NPC2, has focused attention on the mechanisms by which lipids, in particular cholesterol, are transported out of the LE/LY compartment. This review discusses the role of the NPC2 protein in cholesterol transport, and the potential for concerted action of NPC1 and NPC2 in regulating normal intracellular cholesterol homeostasis.
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