Hot Natural Products & Bioactive Compounds

1.Neolinine(at 10uM) shows significant hERG K+ channel inhibition activity.

Standard reference

1. Puerol A exhibits potent inhibitory effects on aldose reductase with IC50 values of 6.4 uM.
2. dl-Puerol A has antioxdiant activity, it shows inhibitory effects on copper ion-induced protein oxidative modification of mouse brain homogenate in vitro.

1.Cycloshizukaol A prevents monocyte adhesion to HUVEC through the inhibition of cell adhesion molecules expression stimulated by TNF-alpha, it inhibits PMA-induced homotypic aggregation of HL-60 cells without cytotoxicity with MIC values of 0.9 microM.

1.(+)-Norglaucine shows cytotoxic activity toward the tumor cell lines B16-F10 (mouse melanoma), HepG2 (human hepatocellular carcinoma), K562 (human chronic myelocytic leukemia) and HL-60 (human promyelocytic leukemia) and non-tumor peripheral blood mononuclear cells (PBMCs).

1. 1-Hydroxy-2,3,5-trimethoxyxanthone (HM-1) has vasodilator action ,which involves both an endothelium-dependent mechanism involving NO and an endothelium-independent mechanism by inhibiting Ca(2+) influx through L-type voltage-operated Ca(2+) channels; a minor contribution to the effects of HM-1 may be related to inhibition of the protein kinase C-mediated release of intracellular Ca(2+) stores.
2. HM-1,at the concentration of 1 ug/mL, can effectively inhibit the osteoclast differentiation in a co-culture system with mouse osteoblastic calvarial cells and bone marrow cells, it exhibits significant inhibition of osteoclast differentiation even at a low concentration (0.01 ug/mL) in a dose-dependent manner, and it can significantly reduce the pit formation on the dentine slice compared with the control group.
3. HM-1 can protect mice from the acute lung injury induced by ipopolysaccharide (LPS), which is relative to the increasing of IκB-α protein expression and the suppressing of inducible nitric oxide synthase and cyclooxygenase-Ⅱ protein expression.

Standard reference

1.Borapetoside E has anti-hyperglycemic activity, it can significantly reduce serum glucose levels at dose-dependent manners in alloxan-induced hyperglycemic mice and db/db type 2 diabetic mice.