Direct Fluorescent Detection of a Polymethoxyflavone in Cell Culture and Mouse Tissue
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- 作者：Jingjing Chen ; Mingyue Song ; Xian Wu ; Jinkai Zheng ; Lili He ; David Julian McClements ; Eric Decker ; Hang Xiao
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2015
- 出版时间：December 16, 2015
- 年：2015
- 卷：63
- 期：49
- 页码：10620-10627
- 全文大小：437K
- ISSN：1520-5118
文摘
Convenient detection methods for bioactive food compounds and their metabolites in biological samples are needed to better understand their mechanism of actions. Herein, we developed a novel approach to directly monitor and visualize the distribution of 5,3鈥?4鈥?tridemethylnobiletin (TDN), a unique polymethoxyflavone metabolite derived from citrus polymethoxyflavone, in biological samples such as cultured cells and mouse colonic tissues. Our results showed that a fluorescent conjugate could be formed between TDN and 2-aminoethyl diphenyl borate (DPBA) under simple reaction conditions, which was confirmed by both Raman spectroscopy and mass spectroscopy. We further demonstrated the application of DPBA-based conjugation reaction in the characterization of TDN in different biological samples including floating cells, adherent cells, and animal tissues. This is the first report demonstrating direct fluorescent detection of polymethoxyflavone in biological samples.