Three-dimensional label-free imaging and quantification of lipid droplets in live hepatocytes.

Three-dimensional label-free imaging and quantification of lipid droplets in live hepatocytes.
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活肝细胞中脂质液滴的三维无标签成像和定量。

DOI:
10.1038/srep36815
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发表时间:
2016-11-22
期刊:
影响因子:
4.6
通讯作者:
Park Y
Park Y
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Kim K;Lee S;Yoon J;Heo J;Choi C;Park Y

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脂滴(Lipid droplets,LD)是一种亚细胞器,在脂质储存和代谢中具有重要作用,并参与多种疾病,包括癌症、肥胖和糖尿病。然而,常规方法提供关于单个LD的定量信息的能力有限,并且活细胞中LD的三维(3-D)成像能力有限,特别是对于3-D动态的快速采集。在这里,我们提出了一种光学方法的基础上的3-D定量相位成像测量的3-D结构分布和生化参数(浓度和干质量)的个别LD在活细胞中,而不使用外源性标记剂。定量研究了油酸处理下LDs的生化变化,并对LDs的快速动力学进行了四维跟踪,揭示了LDs在活细胞中的胞内转运。
Lipid droplets (LDs) are subcellular organelles with important roles in lipid storage and metabolism and involved in various diseases including cancer, obesity, and diabetes. Conventional methods, however, have limited ability to provide quantitative information on individual LDs and have limited capability for three-dimensional (3-D) imaging of LDs in live cells especially for fast acquisition of 3-D dynamics. Here, we present an optical method based on 3-D quantitative phase imaging to measure the 3-D structural distribution and biochemical parameters (concentration and dry mass) of individual LDs in live cells without using exogenous labelling agents. The biochemical change of LDs under oleic acid treatment was quantitatively investigated, and 4-D tracking of the fast dynamics of LDs revealed the intracellular transport of LDs in live cells.
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