Iridoid and aromatic glycosides from Scrophularia ningpoensis Hemsl. and their inhibition of [Ca2+](i) increase induced by KCl.
Bioassay-guided fractionation of EtOH extract of the roots of Scrophularia ningpoensis Hemsl. resulted in the isolation of three new iridoid glycosides, i.e., 6''-O-caffeoylharpagide (1), 6''-O-feruloylharpagide (2), and 6''-O-beta-glucopyranosylharpagoside (3), and five new aromatic glycosides, i.e., 2-(3-hydroxy-4-methoxyphenyl)ethyl O-alpha-arabinopyranosyl-(1-->6)-O-alpha-rhamnopyranosyl-(1-->3)-O-beta-glucopyranoside (4), phenyl O-beta-xylopyranosyl-(1-->6)-O-beta-glucopyranoside (5), 3-methylphenyl O-beta-xylopyranosyl-(1-->6)-O-beta-glucopyranoside (6), 6-O-cinnamoyl beta-fructofuranosyl-(2-->1)-O-alpha-glucopyranosyl-(6-->1)-O-alpha-glucopyranoside (7), and 6-O-feruloyl beta-fructofuranosyl-(2-->1)-O-alpha-glucopyranosyl-(6-->1)-O-alpha-glucopyranoside (8), together with four known compounds, i.e., 6''-O-alpha-D-galactopyranosyl harpagoside (9), 6''-O-(p-coumaroyl) harpagide (10), harpagoside (11), and angoroside C (12). Activity of the isolated compounds on [Ca2+](i) increase induced by KCl was evaluated on rat cardiac myocytes using confocal laser scanning microscopy. Iridoid glycosides 1, 10, and 11, and aromatic glycosides 5 and 6 significantly inhibited the increase of [Ca2+](i) induced by KCl at 100 microM.
Chen
Bin
B
Department of Natural Products Chemistry 81#, Shenyang Pharmaceutical University, 103 Wenhua Avenue, Shenyang 110016, P. R. China.
Liu
Yan
Y
Liu
Hong-Wei
HW
Wang
Nai-Li
NL
Yang
Bao-Feng
BF
Yao
Xin-Sheng
XS
D000818:Animals; D002118:Calcium / Q000378:metabolism*; D006027:Glycosides / Q000737:chemistry* / Q000494:pharmacology*; D006801:Humans; D039823:Iridoids / Q000737:chemistry* / Q000494:pharmacology*; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D015394:Molecular Structure; D032383:Myocytes, Cardiac / Q000187:drug effects / Q000378:metabolism; D011189:Potassium Chloride / Q000494:pharmacology*; D051381:Rats; D017208:Rats, Wistar; D032266:Scrophularia / Q000737:chemistry*
D006027:Glycosides; D039823:Iridoids; D011189:Potassium Chloride; D002118:Calcium