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Effect-Directed Discovery of Bioactive Compounds Followed by Highly Targeted Characterization, Isolation and Identification, Exemplarily Shown for Solidago virgaurea
Analytical Chemistry ( IF 6.7 ) Pub Date : 2016-08-01 00:00:00 , DOI: 10.1021/acs.analchem.6b02007
Ágnes M. Móricz 1 , Péter G. Ott , Tim T. Häbe 1 , András Darcsi 2 , Andrea Böszörményi 2 , Ágnes Alberti 2 , Dániel Krüzselyi , Péter Csontos , Szabolcs Béni 2 , Gertrud E. Morlock 1
Affiliation  

A nontargeted, effect-directed screening (bioprofiling) and a subsequent highly targeted characterization of antibacterial compounds from plant matrices is demonstrated on the example of Solidago virgaurea root extracts. The procedure comprises high-performance thin-layer chromatography (HPTLC) coupled with six bacterial bioassays including two plant pathogens, a radical scavenging assay, an acetylcholinesterase assay as well as in situ and ex situ mass spectrometric analyses. In situ mass spectra were directly recorded from the adsorbent using the Direct Analysis in Real Time interface (HPTLC-DART-MS), whereas ex situ mass spectra were recorded using an elution head-based interface (HPTLC-ESI-MS). For further bioassay-guided isolation of the main antimicrobial compounds, flash chromatographic fractionation and semipreparative high-performance liquid chromatographic purification were used and nuclear magnetic resonance data allowed the identification of the unknown antimicrobial compounds as 2Z,8Z- and 2E,8Z-matricaria esters. The discovered antibacterial activity was confirmed and specified by a luminometric assay and as minimal inhibitory concentration in the liquid phase.

中文翻译:

定向导向的生物活性化合物的发现以及高度针对性的表征,分离和鉴定,对甜叶菊具有示范性作用

Solidago virgaurea的实例上证明了非靶向,效果导向的筛选(生物特征分析)以及随后对植物基质中的抗菌化合物的高度靶向表征根提取物。该程序包括高效薄层色谱(HPTLC),以及包括两种植物病原体在内的六种细菌生物测定,自由基清除测定,乙酰胆碱酯酶测定以及原位和异位质谱分析。使用实时直接分析界面(HPTLC-DART-MS)从吸附剂直接记录原位质谱,而使用基于洗脱头的界面(HPTLC-ESI-MS)记录非原位质谱。对于进一步的生物测定指导的主要抗菌化合物的分离,使用了快速色谱分离和半制备型高效液相色谱纯化,并且核磁共振数据可以将未知的抗菌化合物鉴定为2 Z,8 Z-和2 E,8 Z-母菊酯。所发现的抗菌活性已通过光度测定法确认并确定为液相中的最小抑菌浓度。
更新日期:2016-08-01
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