Chemical Constituents from Leaves of Pileostegia viburnoides Hook.f.et Thoms

Phytochemical investigation on the leaves of Pileostegia viburnoides Hook.f.et Thoms led to the isolation of twenty-five compounds, and their structures were identified as n-dotriacontane (1), taraxeryl acetate (2), friedelin (3), epifriedelinol (4), canophyllal (5), stigmast-4-en-3-one (6), stigmasterol (7), (24R)-5A-stigmastane-3,6-dione (8), ursolic acid (9), pomolic acid (10), umbelliferone (11), 4-epifriedelin (12), n-octatriacontanol (13), β-amyrin (14), α-amyrin (15), taraxerol (16), nonadecanol (17), friedelane (18), arachic acid (19), protocatechuic acid (20), n-pentatriacontanol (21), hexadecanoic acid (22), vincosamide (23), daucosterol (24), and skimming (25), respectively. To our best knowledge, compounds 1, 2, 12, 13, 17 - 19 and 21-23 were new within Saxifragaceae family. Compounds 15, 16, and 20 were produced from this genus for the first time. Compounds 4, 14 and 25 were first obtained from species P. viburnoides and compounds 3, 5 - 11, and 24 were achieved from the leaves of P. viburnoides for the first time. Furthermore, the anti-neuroinflammatory activity of these isolates was evaluated.

Cytotoxicity and anti-inflammatory effects of root bark extracts of Acanthopanax henryi / 中国天然药物

AIM@#To investigate the cytotoxicity, anti-inflammatory activity, and action mechanism of root bark extracts of Acanthopanax henryi.@*METHOD@#The hot methanol extract of the root bark of A. henryi was subjected to XAD-4 column chromatography eluting with a gradient of methanol in water. The cytotoxicity and anti-inflammatory effects of the MeOH fractions were evaluated on the inhibition on lipopolysaccharide (LPS)-induced nitric oxide, prostaglandin E2, interleukin-1β, and interleukin-6 production in RAW 264.7 macrophages.@*RESULTS@#The 80% MeOH fraction was a better inhibitor of LPS-induced NO, PGE2, IL-1β, and IL-6 production, and expression of inducible nitric oxide synthase (iNOS) at the protein levels in a concentration-dependent manner.@*CONCLUSION@#The 80% MeOH fraction of A. henryi root bark has significant anti-inflammatory activity. This provides a pharmacological basis for clinical application for the treatment of inflammation.