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Molecules 2015, 20(9), 16266-16277;

Metabolomics-Based Screening of Biofilm-Inhibitory Compounds against Pseudomonas aeruginosa from Burdock Leaf

1,2,3,*, 1,2, 1,3 and 1,*
State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
State Key Laboratory of Dairy Biotechnology, Technology Center of Bright Dairy and Food Company Ltd., Shanghai 200436, China
Department of Food Science and Technology, University of California, Davis, CA 95616, USA
Authors to whom correspondence should be addressed.
Academic Editor: Isabel C. F. R. Ferreira
Received: 7 June 2015 / Revised: 13 July 2015 / Accepted: 27 July 2015 / Published: 8 September 2015
(This article belongs to the Section Natural Products Chemistry)
PDF [732 KB, uploaded 8 September 2015]


Screening of anti-biofilm compounds from the burdock leaf based on metabolomics is reported here. The crystal violet assay indicated 34% ethanol elution fraction of burdock leaf could completely inhibit biofilm formation of Pseudomonas aeruginosa at 1 mg·mL−1. Then, the chemical composition of burdock leaf fraction was analyzed by ultra-performance liquid chromatography-mass spectrometry (UPLC-MS) and 11 active compounds (chlorogenic acid, caffeic acid, p-coumaric acid, quercetin, ursolic acid, rutin, cynarin, luteolin, crocin, benzoic acid, and Tenacissoside I) were identified. Lastly, UPLC-MS analysis was employed to obtain the metabolic fingerprints of burdock leaf fractions before and after inhibiting the biofilm of Pseudomonas aeruginosa. The metabolic fingerprints were transformed to data, analyzed with PLS-DA (partial least squares discriminant analysis) and the peaks whose area was significantly changed were found out. Thus, 81 compounds were screened as potential anti-biofilm ingredients. Among them, rutin, ursolic acid, caffeic acid, p-coumaric acid and quercetin were identified and confirmed as the main anti-biofilm compounds in burdock leaf. The study provided basic anti-biofilm profile data for the compounds in burdock leaf, as well as provided a convenient method for fast screening of anti-biofilm compounds from natural plants. View Full-Text
Keywords: screening; anti-biofilm compounds; burdock leaf; metabolomics; data analysis screening; anti-biofilm compounds; burdock leaf; metabolomics; data analysis

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Lou, Z.; Tang, Y.; Song, X.; Wang, H. Metabolomics-Based Screening of Biofilm-Inhibitory Compounds against Pseudomonas aeruginosa from Burdock Leaf. Molecules 2015, 20, 16266-16277.

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