Abstract:
:Pyxinol, the main metabolite of 20S-protopanaxadiol in human liver, was chosen as a novel skeleton for the development of anti-inflammatory agents. Pyxinol derivatives modified at C-3, C-12, or C-25 and selected stereoisomers were designed, prepared, and investigated for in vitro anti-inflammatory activities. Structure-activity relationship (SAR), focused on skeleton, was analyzed based on their ability to inhibit lipopolysaccharide (LPS)-induced nitric oxide (NO) synthesis. The preliminary SAR results signified that the biological activity of the pyxinol derivatives is largely dependent on the R/S stereochemistry of pyxinol skeleton and the hydroxy at C-3 is a modifiable position. Among the tested compounds, the 3-oximinopyxinol (4a) exhibited the most potent NO-inhibitory activity and was even comparable to the steroid drug. Furthermore, compound 4a also significantly decreased LPS-induced TNF-α and IL-6 synthesis and iNOS and COX-2 expressions via the NF-κB pathway. This study proves that pyxinol is an interesting skeleton for anti-inflammatory drug discovery.
journal_name
ACS Med Chem Lettjournal_title
ACS medicinal chemistry lettersauthors
Sun Y,Fang X,Gao M,Wang C,Gao H,Bi W,Tang H,Cui Y,Zhang L,Fan H,Yu H,Yang Gdoi
10.1021/acsmedchemlett.9b00562subject
Has Abstractpub_date
2020-02-12 00:00:00pages
457-463issue
4issn
1948-5875journal_volume
11pub_type
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