Simultaneous analysis of artemisinin and flavonoids of several extracts of Artemisia annua L. obtained from a commercial sample and a selected cultivar.
Artemisia annua L. (Qinghao) is a promising and potent antimalarial herbal drug. This activity has been ascribed to its component artemisinin, a sesquiterpene lactone that is very effective against drug-resistant Plasmodium species with a low toxicity. Our studies indicate that several flavonoids of A. annua can promote and enhance the reaction of artemisinin with hemin. These data are in good agreement with previous investigations on the in vitro potentiation of antimalarial activity of artemisinin by such flavonoids. As a consequence, in view of a possible use of the phytocomplex rather than pure artemisinin, an HPLC/DAD/MS method is proposed for the simultaneous detection and quantification of both flavonoids and artemisinin. Different extracts, obtained from two different herbal drugs, a commercial sample and a selected cultivar, were analyzed in order to determine which solvents provide the best yields of both artemisinin and flavonoids. Qualitative and quantitative results obtained using an HPLC method are described, which will be useful for developing highly effective herbal drug preparations.
Department of Pharmaceutical Sciences, University of Florence, Via U. Schiff 6, 50019 Sesto Fiorentino-Florence, Italy. ar.bilia@unifi.it
A R
AR
Bilia
P
P
Melillo de Malgalhaes
M C
MC
Bergonzi
F F
FF
Vincieri
D000962:Antimalarials / Q000032:analysis; D031172:Artemisia annua / Q000737:chemistry*; D037621:Artemisinins / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D005419:Flavonoids / Q000032:analysis*; D010936:Plant Extracts / Q000737:chemistry; D012717:Sesquiterpenes / Q000032:analysis*; D021241:Spectrometry, Mass, Electrospray Ionization
D000962:Antimalarials; D037621:Artemisinins; D005419:Flavonoids; D010936:Plant Extracts; D012717:Sesquiterpenes; C031327:artemisinin