α-Glucosidase Inhibitory and Anti-Inflammatory Coumestans from the Roots of Dolichos trilobus

Planta Medica ◽  
2018 ◽  
Vol 85 (02) ◽  
pp. 112-117 ◽  
Author(s):  
Meng-Yuan Jiang ◽  
Ming Luo ◽  
Kai Tian ◽  
Yan-Hong Li ◽  
Jing-Xian Sun ◽  
...  

AbstractFour new coumestans dolichosins A – D (1–4) were isolated from the roots of Dolichos trilobus, together with four known compounds: isosojagol (5), phaseol (6), psoralidin (7), and 4″,5″-dehydroisopsoralidin (8). Their structures were elucidated on the basis of spectroscopic data interpretation, mass spectrometric analyses, and the comparison with literature data of related compounds. The anti-inflammatory activity of these compounds (1–8) was evaluated through the inhibition of nitric oxide production in lipopolysaccharide-activated murine macrophage RAW 264.7 cells, in which compounds 1 and 6 displayed moderate inhibitory activity and no cytotoxic effects. In a α-glucosidase inhibitory assay, compounds 1 and 5–8 exhibited appreciable inhibition on α-glucosidase. Especially compounds 1, 7, and 8 showed IC50 values lower than 20.0 µM.

2007 ◽  
Vol 36 (2) ◽  
pp. 203-211 ◽  
Author(s):  
Thongchai Taechowisan ◽  
Pittaya Tuntiwachwuttikul ◽  
Chunhua Lu ◽  
Yuemao Shen ◽  
Saisamorn Lumyong ◽  
...  

Marine Drugs ◽  
2018 ◽  
Vol 16 (11) ◽  
pp. 404 ◽  
Author(s):  
Szu-Yin Yu ◽  
Shih-Wei Wang ◽  
Tsong-Long Hwang ◽  
Bai-Luh Wei ◽  
Chien-Jung Su ◽  
...  

One new neolignan, racelactone A (1), together with seven known compounds (2−8) were isolated from the methanolic extract of the leaves and twigs of Lumnitzera racemosa. The structure of racelactone A (1) was determined on the basis of the mass and NMR spectroscopic data interpretation. With respect to bioactivity, compound 1 displayed an anti-angiogenic effect by suppressing tube formation. Furthermore, compounds 1, 4, and 5 showed significant anti-inflammatory effects with IC50 values of 4.95 ± 0.89, 1.95 ± 0.40, and 2.57 ± 0.23 μM, respectively. The plausible biosynthesis pathway of racelactone A (1) was proposed.


Author(s):  
Chun Whan Choi ◽  
Ju Young Shin ◽  
Changon Seo ◽  
Seong Su Hong ◽  
Eun-Kyung Ahn ◽  
...  

2012 ◽  
Vol 7 (11) ◽  
pp. 1934578X1200701
Author(s):  
Chihiro Ito ◽  
Tomiyasu Murata ◽  
Hugh T.-W. Tan ◽  
Norio Kaneda ◽  
Hiroshi Furukawa ◽  
...  

Study of the chemical constituents of the stems of Derris trifoliata Lour. (Leguminosae) collected in Singapore led to the isolation and identification of three known and two new rotenoid derivatives. The new derivatives, named derrisfolin A (1) and B (2), inhibited nitric oxide production in murine macrophage-like RAW 264.7 cells stimulated with interferon-γ and lipopolysaccharide.


2016 ◽  
Vol 79 (6) ◽  
pp. 1548-1553 ◽  
Author(s):  
Qinghao Jin ◽  
Jin Woo Lee ◽  
Hari Jang ◽  
Ji Eun Choi ◽  
Dongho Lee ◽  
...  

Author(s):  
Chun Whan Choi ◽  
Ju Young Shin ◽  
Changon Seo ◽  
Seong Su Hong ◽  
Eun-Kyung Ahn ◽  
...  

Background: Plants still remain the prime source of drugs for the treatment of inflammation and can provide leads for the development of novel anti-inflammatory agents. Material and methods: An in vitro bioassay guide revealed that the 80% ethanol (EtOH) extract of the whole plant, Amomum tsao-ko (Zingiberaceae), displayed anti-inflammatory activity after assessing its effects on murine macrophage RAW 264.7 cells. Result: Phytochemical study of the 80% EtOH extract of Amomum tsao-ko led to the isolation of eight compounds: 4-hydroxy-3-methoxy-benzoic acid (1), meso-hannokinol (2), (+)-hannokinol (3), coumaric acid (4), 4-hydroxy-benzoic acid (5), (+)-epicatechin (6), (-)-catechin (7), and myrciaphenone A (8). The results indicated that two of the isolated components, (+)-epicatechin (6) and (-)-catechin (7), inhibited the production of nitric oxide (NO) significantly in lipopolysaccharide treated RAW 264.7 cells. Conclusion: LPS-induced interleukin tumor necrosis factor-alpha (TNF-), IL-1β and IL-10 production was also decreased in a dose-dependent manner. In addition, western blot analysis revealed that (+)-epicatechin (6) and (-)-catechin (7) reduced the expression of inducible nitric oxide synthase and inhibited nuclear localization of nuclear factor kappa-B (NF-κB).


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