HPLC assays of naringin and hesperidin in Chinese herbs and serum

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Title:	HPLC assays of naringin and hesperidin in Chinese herbs and serum
Authors:	Chang, CW;Hsiu, SL;Wu, PP;Kuo, SC;Chao, PDL
Contributors:	藥學院藥化所;CHINA MED COLL,GRAD INST PHARMACEUT CHEM,TAICHUNG,TAIWAN;CHINA MED COLL,SCH PHARM,TAICHUNG,TAIWAN
Date:	1997
Issue Date:	2010-09-24 15:06:34 (UTC+8)
Publisher:	NATL LABORATORIES FOODS DRUGS
Abstract:	Two series of 2',3',4',5,6,7-substituted 8-phenyl-1,8-naphthyridin-4-ones and 2-phenylpyrido-[1,2-a]pyrimidin-4-ones have been synthesized and evaluated as cytotoxic compounds and as inhibitors of tubulin polymerization. Most 2-phenyl-1,8-naphthyridin-4-ones showed potent cytotoxic and antitubulin activities, whereas 2-phenylpyrido[1,2-a]pyrimidin-4-ones showed no activity in either assay. In general, a good correlation was found between cytotoxicity and inhibition of tubulin polymerization in the 2-phenyl-1,8-naphthyridin-4-one series. The 2-phenyl-1,8-naphthyridin-4-ones (44-49) with a methoxy group at the 3'-position showed potent cytotoxicity against most tumor cell lines with GI(50) values in the low micromolar to nanomolar concentration range in the National Cancer Institute's 60 human tumor cell line in vitro screen. Introduction of substituents (e.g. F, Cl, CH3, and OCH3) at the 4'-position led to compounds with reduced or little activity and substitution at the 2'-position resulted in inactive compounds. The effects of various A-ring substitutions on activity depend on the substitution in ring C. Compounds 44-50 were potent inhibitors of tubulin polymerization, with activity nearly comparable to that of the potent antimitotic natural products colchicine, podophyllotoxin, and combretastatin A-4. Compounds 44-49 also inhibited the binding of radiolabeled colchicine to tubulin, but the inhibition was less potent than that obtained with the natural products. Further investigation is underway to determine if substitution at the 3'-position and multisubstitutions in ring C will result in compounds with increased activity.
Relation:	JOURNAL OF FOOD AND DRUG ANALYSIS 5(2):111-120
Appears in Collections:	[Graduate Institute of Pharmaceutical Chemistry] Journal articles

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