Carviolin is an anthraquinone fungal metabolite that has been found inZ. longicaudatawith immunosuppressive and antitrypanosomal activities.1,2It inhibits LPS- or concanavalin A-induced proliferation of mouse splenocytes (IC50s = 4 and 4.5 μg/ml, respectively).1Carviolin is active againstT. b. brucei(MIC = 41.66 μM).2
1.Fujimoto, H., Nakamura, E., Okuyama, E., et al.Six immunosuppressive features from an ascomycete, Zopfiella longicaudata, found in a screening study monitored by immunomodulatory activityChem. Pharm. Bull. (Tokyo)52(8)1005-1008(2004) 2.Aly, A.H., Debbab, A., Clements, C.M., et al.NF kappa B inhibitors and antitrypanosomal metabolites from endophytic fungus Penicillium sp. isolated from Limonium tubiflorumBioorg. Med. Chem.19(1)414-421(2011) |
Rhein-13C4 is intended for use as an internal standard for the quantification of rhein by GC- or LC-MS. Rhein is an anti-inflammatory anthraquinone found in rhubarb and is the bioactive derivative of its prodrug diacerein . At 10 μM, rhein inhibits IL-1β signaling, suppressing signaling through NF-κB, and reduces the expression of the matrix metalloproteases MMP-1 and MMP-13.1 It inhibits IKKβ (IC50 = 11.8 μM), decreasing iNOS and IL-6 expression in LPS-stimulated macrophages but paradoxically increasing TNF-α, IL-1β, and HMBG1 expression.2 Rhein shows efficacy against pancreatic fibrosis, chronic pancreatitis, and hyperglycemia-induced pancreatic β-cell apoptosis.3,4 It also inhibits angiogenesis of breast cancer cells under normoxic and hypoxic conditions.5 |