[Metabolism of ginsenoside Rb1 and panaxadiol saponins by fungi].
OBJECTIVE
To study the metabolic process of ginsenoside Rb1 (G-Rb1) and panaxadiol saponins (PDS) by fungi.


METHODS
Ten strains of fungi were incubated with G-Rb1 and PDS at a certain temperature with shaking. A portion was taken out at different time and mixed up with butanol. The butanol extract was analysed by thin layer chromatography (TLC), high performance liquid chromatography (HPLC) and electrospray ionazition mass spectrometry (ESI-MS).


RESULTS
It was found that there were ginsenoside-Rd (G-Rd), ginsenoside-F2 (G-F2), compound K (CK) and 20(S) protopanaxadiol (Ppd) metabolites beside the prodrug G-Rb1 induced by fungi (No. 1, 2, 3, 6, 8, 9).


CONCLUSIONS
The six strains of fungi have different degrees of ability to metabolize G-Rb1 and PDS. The possible metabolic process could be as follows: G-Rb1 (or PDS)-->G-Rd-->G-F2-->CK-->Ppd.
Ma
J S
JS
Research Centre of New Drug, Changchun College of Traditional Chinese Medicine, Changchun 130021, China.
Zhou
Q L
QL
Fei
X F
XF
Sun
Y
Y
Wang
B X
BX
D001232:Aspergillus fumigatus / Q000378:metabolism / Q000502:physiology; D005658:Fungi / Q000378:metabolism* / Q000502:physiology; D036145:Ginsenosides / Q000302:isolation & purification / Q000378:metabolism*; D005894:Panax / Q000737:chemistry; D010843:Pichia / Q000378:metabolism / Q000502:physiology; D012442:Saccharomycopsis / Q000378:metabolism / Q000502:physiology; D012503:Saponins / Q000302:isolation & purification / Q000378:metabolism*
D036145:Ginsenosides; D012503:Saponins; C442759:ginsenoside Rb1