Nat Prod Commun. 2015 Feb;10(2):301-3. |
Phosphodiesterase inhibitory activity of the flavonoids and xanthones from Anaxagorea luzonensis.[Pubmed: 25920267] |
METHODS AND RESULTS: Five flavonoids, one isoflavone and five xanthones were isolated from Anaxagorea luzonensis. Of these eleven isolated compounds, 1,3,5-Trihydroxy-4-prenylxanthone (3) was a relatively potent inhibitor of phosphodiesterase type 5 (PDE5), with an IC50 value of 3.0 μM.
CONCLUSIONS:
This is the first report showing that natural xanthones can exhibit promising PDE5 inhibitory activity. Moreover, this study revealed that the presence of the C-4 prenyl residue attached to the xanthone core is correlated with the significant PDE5 inhibitory activity. |
Journal of Medicinal Plant Research, 2012 , 6 (21):3781-3785. |
Cholinesterase inhibitory activities of xanthones from Anaxagorea luzonensis A. Gray[Reference: WebLink] |
METHODS AND RESULTS:
Five xanthones (1-5) were isolated from the heartwood of Anaxagorea luzonensis A. Gray (Annonaceae) and this is the first report of the isolation of xanthone 1 (6-deoxyisojacareubin) from this species. The in vitro inhibitory activity against acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) of these isolated xanthones was highest in 1,3,5-Trihydroxy-4-prenylxanthone (3) for both enzymes with IC50 values of 56.3±0.4 and 46.0±0.3 μM, respectively.
CONCLUSIONS:
The presence of the C-4 prenyl residue attached to the xanthone core co-orrelated significantly with the AChE and BChE inhibitory activities and was significantly reduced by hydroxylation (removal of the carbon double bond and addition of a hydroxyl group). |