emodin

Emodin is a naturally occurring anthraquinone derivative found in the roots and leaves of various plants such as Rheum palmatum (rhubarb) and Polygonum multiflorum. It has been used for centuries in traditional Chinese medicine. Emodin exhibits a wide range of biological activities including anti-inflammatory, antioxidant, anticancer, antimicrobial (antibacterial and antiviral), diuretic, antiulcerative and antinociceptive effects[1][3][4]. Mechanistically, emodin acts as an inhibitor of several cell signaling pathways involved in inflammation and cancer progression. It inhibits nuclear factor kappa-B (NF-κB), JNK/p38 MAPK/Erk1/2 pathways; suppresses pro-inflammatory cytokines such as TNF-α and IL-6; inhibits matrix metalloproteinases like MMP-9; modulates histone deacetylase activity; increases nitric oxide production via eNOS activation; and can inhibit 5-lipoxygenase (5-LOX)[4][5][6]. Emodin also promotes apoptosis in cancer cells by increasing reactive oxygen species (ROS) levels[8]. Despite promising preclinical data for conditions such as cancer, cardiovascular disease (including myocardial hypertrophy/fibrosis), metabolic disorders, liver diseases like hepatitis/cholelithiasis, ulcerative colitis and microbial infections[2][3][4], there are no approved clinical uses or robust human trial data to support its efficacy or safety for any indication[1][5].

Other names

1,3,8-trihydroxy-6-methyl-anthraquinone1,3,8-trihydroxy-6-methylemodin3',4',5',7-tetrahydroxyflavone