DAMP, an acidotropic pH indicator, can be used as a tool to visualize non-esterified cholesterol in cells.

DAMP, an acidotropic pH indicator, can be used as a tool to visualize non-esterified cholesterol in cells.
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DAMP 是一种促酸 pH 指示剂,可用作可视化细胞中非酯化胆固醇的工具。

DOI:
10.1093/abbs/gmu123
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发表时间:
2015-02
期刊:
Acta Biochim Biophys Sin
影响因子:
--
通讯作者:
Li Xu
Li Xu
中科院分区:
其他
文献类型:
--
作者:
Li Weimin;Wang Rong;Zhang Shaojuan;Li Xu

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富含胆固醇的区域是研究涉及胆固醇积累的代谢紊乱的有吸引力的目标。尽管人们努力开发用于标记细胞中富含胆固醇区域的探针,但这些试剂中很少有低分子量的。先前的研究表明,酸性 pH 指示剂 N-{3-[(2,4-二硝基苯基)氨基]丙基}-N-(3-氨基丙基)甲胺二盐酸盐 (DAMP) 会与富含胆固醇的细胞器发生反应,例如来自内分泌细胞的内分泌分泌颗粒。在这项研究中,我们证明DAMP可以以剂量依赖的方式与游离胆固醇发生反应,并且DAMP能够检测富含胆固醇的亚细胞器。 DAMP 足以检测富含游离胆固醇的器官,但无法检测主要由酯化胆固醇组成的动脉粥样硬化斑块。总而言之,这些结果表明 DAMP 有助于研究富含胆固醇的脂筏和涉及胆固醇积累的疾病。
Cholesterol-rich regions are attractive targets for studying metabolic disorders that involve accumulation of cholesterol. Despite efforts to develop probes for labelling cholesterol-rich regions in cells, few of these reagents have a low molecular weight. Previous studies have shown that the acidotropic pH indicator, N-{3-[(2,4-dinitrophenyl)amino]propyl}-N-(3-aminopropyl)methylamine dihydrochloride (DAMP), reacts with cholesterol-rich organelles, such as endocrine secretary granules from endocrine cells. In this study, we demonstrated that DAMP could react with free cholesterol in a dose-dependent manner, and DAMP was able to detect cholesterol-rich subcellular organelles. DAMP was sufficiently potent to detect free cholesterol-enriched organs, but was unable to detect atherosclerotic plaques primarily composed of esterified cholesterol. Taken together, these results demonstrate that DAMP facilitates the study of cholesterol-enriched lipid rafts and disorders which involve cholesterol accumulation.
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