Document Detail

Phytochemistry of cimicifugic acids and associated bases in Cimicifuga racemosa root extracts.
MedLine Citation:
PMID:  19140115     Owner:  NLM     Status:  MEDLINE    
INTRODUCTION: Earlier studies reported serotonergic activity for cimicifugic acids (CA) isolated from Cimicifuga racemosa. The discovery of strongly basic alkaloids, cimipronidines, from the active extract partition and evaluation of previously employed work-up procedures has led to the hypothesis of strong acid/base association in the extract.
OBJECTIVE: Re-isolation of the CAs was desired to permit further detailed studies. Based on the acid/base association hypothesis, a new separation scheme of the active partition was required, which separates acids from associated bases.
METHODOLOGY: A new 5-HT(7) bioassay guided work-up procedure was developed that concentrates activity into one partition. The latter was subjected to a new two-step centrifugal partitioning chromatography (CPC) method, which applies pH zone refinement gradient (pHZR CPC) to dissociate the acid/base complexes. The resulting CA fraction was subjected to a second CPC step. Fractions and compounds were monitored by (1)H NMR using a structure-based spin-pattern analysis facilitating dereplication of the known acids. Bioassay results were obtained for the pHZR CPC fractions and for purified CAs.
RESULTS: A new CA was characterised. While none of the pure CAs was active, the serotonergic activity was concentrated in a single pHZR CPC fraction, which was subsequently shown to contain low levels of the potent 5-HT(7) ligand, N(omega)-methylserotonin.
CONCLUSION: This study shows that CAs are not responsible for serotonergic activity in black cohosh. New phytochemical methodology (pHZR CPC) and a sensitive dereplication method (LC-MS) led to the identification of N(omega)-methylserotonin as serotonergic active principle.
Tanja Gödecke; Dejan Nikolic; David C Lankin; Shao-Nong Chen; Sharla L Powell; Birgit Dietz; Judy L Bolton; Richard B van Breemen; Norman R Farnsworth; Guido F Pauli
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Phytochemical analysis : PCA     Volume:  20     ISSN:  1099-1565     ISO Abbreviation:  Phytochem Anal     Publication Date:    2009 Mar-Apr
Date Detail:
Created Date:  2009-02-19     Completed Date:  2009-04-27     Revised Date:  2013-06-02    
Medline Journal Info:
Nlm Unique ID:  9200492     Medline TA:  Phytochem Anal     Country:  England    
Other Details:
Languages:  eng     Pagination:  120-33     Citation Subset:  IM    
Copyright Information:
Copyright (c) 2009 John Wiley & Sons, Ltd.
UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy and PCRPS, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, USA.
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MeSH Terms
CHO Cells
Caffeic Acids / chemistry*
Cimicifuga / chemistry*
Magnetic Resonance Spectroscopy
Phenylacetates / chemistry*
Plant Extracts / chemistry*
Plant Roots / chemistry*
Spectrometry, Mass, Electrospray Ionization
Grant Support
P50 AT 00155/AT/NCCAM NIH HHS; P50 AT000155/AT/NCCAM NIH HHS; P50 AT000155-06/AT/NCCAM NIH HHS; P50 AT000155-060001/AT/NCCAM NIH HHS; P50 AT000155-07/AT/NCCAM NIH HHS; P50 AT000155-070001/AT/NCCAM NIH HHS; P50 AT000155-08/AT/NCCAM NIH HHS; P50 AT000155-080001/AT/NCCAM NIH HHS; P50 AT000155-09/AT/NCCAM NIH HHS; P50 AT000155-090001/AT/NCCAM NIH HHS
Reg. No./Substance:
0/Caffeic Acids; 0/Phenylacetates; 0/Plant Extracts; 0/cimicifugic acid

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