发布: 2018年04月20日第8卷第8期 DOI: 10.21769/BioProtoc.2816 浏览次数: 10530
评审: Aswad KhadilkarChristopher J. PoonAnonymous reviewer(s)
Abstract
This is a flow cytometry-based protocol to measure glucose uptake of mouse embryonic fibroblasts (MEFs) and breast cancer cells in vitro. The method is a slightly modified and updated version as previously described (Dong et al., 2017). Briefly, the target cells are incubated with the fluorescently tagged 2-(N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl)amino)-2-deoxyglucose (2-NBDG) for 2 h or 30 min, and the efficiency of glucose uptake is examined using a flow cytometer. This method can be adapted to measure a variety of adipocytes, immune cells, MEFs and cancer cells.
Keywords: Mouse embryonic fibroblasts (MEFs) (小鼠胚胎成纤维细胞(MEFs))Background
Glucose is the primary source of energy for cells. A family of glucose transporters (GLUT) is responsible for transporting glucose across cell membranes (Kohn et al., 1996). Changes in glucose uptake can reflect the changes in cellular metabolism. For example, tumor cells generally use glucose for aerobic glycolysis in order to support their rapid proliferation. Normally, tumor cells have increased rates of glucose uptake compared to normal cells (Vander Heiden et al., 2009). The 2-deoxyglucose (2DG) is a glucose analog and it accumulates in the cell as 2-deoxyglucose-6-phosphate (2DG6P). 2DG6P has been a gold standard for measuring glucose uptake for a long time (Yamamoto et al., 2011). Although the measurement of radio-labeled 2DG6P is sensitive, many researchers avoid this method because the handling and disposal of radioactive material require a special procedure.
Another non-metabolizable glucose analog is the fluorescently tagged 2-(N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl)amino)-2-deoxyglucose (2-NBDG). This molecule accumulates in living cells through a glucose transporter and does not enter the glycolytic pathway. Fluorescence generated by 2-NBDG is proportional to glucose uptake. 2-NBDG fluorescence typically displays excitation/emission maxima of ~465/540 nm. It can be detected using optical filters designed for fluorescein using flow cytometry (O'Neil et al., 2005; Zou et al., 2005; Nitin et al., 2009).
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© 2018 The Authors; exclusive licensee Bio-protocol LLC.
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分类
癌症生物学 > 细胞能量学 > 细胞生物学试验
生物化学 > 糖类 > 葡萄糖
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