|Phytochemistry. 2015 Feb;110:133-9. |
|Lanostanoids with acetylcholinesterase inhibitory activity from the mushroom Haddowia longipes.[Pubmed: 25577284 ]|
METHODS AND RESULTS:
Nine lanostanoids, together with nine known ones, were isolated from the ethyl acetate extract of the fruiting bodies of the mushroom Haddowia longipes. Their structures were elucidated as 11-oxo-ganoderiol D, lanosta-8-en-7,11-dioxo-3β-acetyloxy-24,25,26-trihydroxy, lanosta-8-en-7-oxo-3β-acetyloxy-11β,24,25,26-tetrahydroxy, lanosta-7,9(11)-dien-3β-acetyloxy-24,25,26-trihydroxy, lanosta-7,9(11)-dien-3β-acetyloxy-24,26-dihydroxy-25-methoxy, 11-oxo-Lucidadiol, 11β-hydroxy-Lucidadiol, lucidone H and lanosta-7,9(11),24E-trien-3β-acetyloxy-26,27-dihydroxy by analysing their 1D/2D NMR and MS spectra.
In addition, bioassays of inhibitory activity against acetylcholinesterase (AChE) of all compounds showed that thirteen compounds possessed inhibitory activity against AChE with the percentage inhibition ranging from 10.3% to 42.1% when tested at 100 μM.
|Bioorg Med Chem Lett. 2011 Nov 1;21(21):6603-7. |
|Selective cholinesterase inhibition by lanostane triterpenes from fruiting bodies of Ganoderma lucidum.[Pubmed: 21924611 ]|
METHODS AND RESULTS:
Two new lanostane triterpenes, named methyl ganoderate A acetonide (1) and n-butyl ganoderate H (2), were isolated from the fruiting bodies of Ganoderma lucidum together with 16 known compounds (3-18). Extensive spectroscopic and chemical studies established the structures of these compounds as methyl 7β,15α-isopropylidenedioxy-3,11,23-trioxo-5α-lanost-8-en-26-oate (1) and n-butyl 12β-acetoxy-3β-hydroxy-7,11,15,23-tetraoxo-5α-lanost-8-en-26-oate (2). Because new compounds exhibiting specific anti-acetylcholinesterase activity are being sought as possible drug candidates for the treatment of Alzheimer's and related neurodegenerative diseases, compounds 1-18 were examined for their inhibitory activities against acetylcholinesterase and butyrylcholinesterase. All of the compounds exhibited moderate acetylcholinesterase-inhibitory activity, with IC(50) values ranging from 9.40 to 31.03μM. In contrast, none of the compounds except Lucidadiol (13) and lucidenic acid N (14) exhibited butyrylcholinesterase-inhibitory activity at concentrations up to 200μM.
These results indicate that these lanostane triterpenes are preferential inhibitors of acetylcholinesterase and may be suitable drug candidates.
|Fitoterapia. 2003 Feb;74(1-2):177-80. |
|Antiviral lanostanoid triterpenes from the fungus Ganoderma pfeifferi.[Pubmed: 12628419]|
|Ganodermadiol, Lucidadiol and applanoxidic acid G were isolated as first triterpenes from the European Basidiomycete Ganoderma pfeifferi. The compounds show antiviral activity against influenza virus type A and HSV type 1.|