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ARS Home » Northeast Area » Beltsville, Maryland (BHNRC) » Beltsville Human Nutrition Research Center » Methods and Application of Food Composition Laboratory » Research » Research Project #431562

Research Project: DNA Barcodes/Fingerprints, Chemical Fingerprints, and Metabolic Profiles for Botanical Supplements

Location: Methods and Application of Food Composition Laboratory

Project Number: 8040-52000-066-005-S
Project Type: Non-Assistance Cooperative Agreement

Start Date: Sep 15, 2016
End Date: Sep 14, 2020

Develop DNA barcoding/fingerprinting methods for botanical supplements and correlate this data with spectral and chromatographic fingerprints and metabolomic profiles using Black Cohosh, Maca, and Echinacea as models. Each botanical is a popular dietary supplement with a high market share. Each genus are comprised of numerous species that are frequently used to adulterate or substitute for the target species. This study will develop methods that can be used for botanical supplements and will be incorporated into a database.

Authentic samples of Black Cohosh (Actaea racemosa), Maca (Lepidium meyenii), Echinacea (Echinacea angustofolia and Echinacea purpurea), and Echinacea hybrids will be collected. Specific gene regions will be sequenced (“DNA barcodes”) and/or microsatellites will be genotyped (“DNA fingerprints”). Additionally, chemical fingerprints will be obtained based on chromatographic profiles from ultra high performance liquid chromatography (UHPLC) and spectral fingerprints from direct injection high resolution mass spectrometry (HRMS). Metabolomic profiles will be obtained by combining the chromatography and mass spectrometry for UHPLC-HRMS. Chemometric pattern recognition methods will be applied to the fingerprints to discriminate between species and hybrids. Chemical fingerprints will be correlated with the DNA barcodes and/or fingerprints. The results of these studies will be incorporated into a publicly available database.