Nile Red (solution) 

Nile Red (solution) is a lipophilic stain. Nile red has environment-sensitive fluorescence. Nile red is intensely fluorescent in a lipid-rich environment while it has minimal fluorescence in aqueous media. Nile red is an excellent vital stain for the detection of intracellular lipid droplets by fluorescence microscopy and flow cytof uorometry. Nile red stains intracellular lipid droplets red. The fluorescence wavelength is 559/635 nm^[1].
Solvent and concentration: DMSO: 1 mM

1 工作液的配制
可根据实际情况稀释相应的储备液。注意，如果溶剂为 DMSO，则必须考虑 DMSO 的细胞毒性，并应制备溶剂对照；如果溶剂为纯水，则工作液在加入细胞前需要过滤并除菌。
注：请根据实际情况调整 Nile Red 工作液浓度，且现用现配。
2.细胞染色
2.1 悬浮细胞：离心收集细胞，加入 PBS 洗涤两次，每次 5 分钟。
贴壁细胞：弃去培养基，加入胰蛋白酶消化细胞。离心弃去上清后，加入 PBS 洗涤两次，每次 5 分钟。
2.2 加入 1 mL Nile Red 工作液，室温孵育 5-10 分钟。
2.3 400 g，4°C 离心 3-4 分钟，弃去上清。
2.4 加入 PBS 洗涤细胞两次，每次 5 分钟。
2.5 用 1 mL 无血清培养基或 PBS 重悬细胞后，使用荧光显微镜进行观察。

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

当用尼罗红染色的秀丽隐杆线虫发出绿色荧光时，可以在整个肠道和其他组织中观察到离散的脂质体，它们或成簇或均匀分散，具体取决于动物的基因型或实验治疗^[3]。

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

318.38

C₂₀H₁₈N₂O₂

7385-67-3

Room temperature in continental US; may vary elsewhere.

Please store the product under the recommended conditions in the Certificate of Analysis.

• [1]. Gibrán S Alemán-Nava, et al. How to use Nile Red, a selective fluorescent stain for microalgal neutral lipids. J Microbiol Methods. 2016 Sep;128:74-79.  [Content Brief]

  [2]. Wilber Escorcia, et al. Quantification of Lipid Abundance and Evaluation of Lipid Distribution in Caenorhabditis elegans by Nile Red and Oil Red O Staining. J Vis Exp. 2018 Mar 5;(133):57352.  [Content Brief]

  [3]. Elizabeth C Pino, et al. Biochemical and high throughput microscopic assessment of fat mass in Caenorhabditis elegans. J Vis Exp. 2013 Mar 30;(73):50180.  [Content Brief]

  [4]. Greenspan P, et al. Nile red: a selective fluorescent stain for intracellular lipid droplets. J Cell Biol. 1985 Mar;100(3):965-73.  [Content Brief]