Abstract:
:Biotransformation of 20(S)-protopanaxatriol (1) by the fungus Mucor spinosus AS 3.3450 gave 10 metabolites (2-10), of which 2-5 were previously known. On the basis of NMR and MS analyses, structures 6-10 were established as 12-oxo-23beta-hydroxyl-20(S)-protopanaxatriol (6), 20S,24R-epoxy-dammaran-3beta,6alpha,25-triol-12-one (7), 29-hydroxyl-20(S)-protopanaxatriol (8a), 12-oxo-11beta-hydroxyl-20(S)-protopanaxatriol (8b), 28-hydroxyl-20(S)-protopanaxatriol (9) and 12-oxo-20(S)-protopanaxatriol (10). The biotransformation kinetics of 1 has been investigated and a possible biotransformation pathway proposed. The in vitro cytotoxic activities of metabolites against three human cancer cell lines were determined by the MTT method; compounds 8a, 9 and 10 had more potent inhibitory effects against HL-60 cell line than the substrate.
journal_name
Phytochemistryjournal_title
Phytochemistryauthors
Zhang J,Guo H,Tian Y,Liu P,Li N,Zhou J,Guo Ddoi
10.1016/j.phytochem.2007.05.028subject
Has Abstractpub_date
2007-10-01 00:00:00pages
2523-30issue
20eissn
0031-9422issn
1873-3700pii
S0031-9422(07)00342-1journal_volume
68pub_type
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