||Licochalcone B has antitumor, antimetastatic, cardioprotective, antioxidant, antiapoptotic, and anti-inflammatory effects, it can significantly inhibit LPS-induced phosphorylation at serine 276 and transcriptional activation of NF-KB. Licochalcone B can protect the liver from carbon tetrachloride (CCl4)-induced injury, the protection may be due to inhibition of p38 and NFκB signaling, which subsequently reduces inflammation in the liver. |
||CDK | PARP | Bcl-2/Bax | p38MAPK | Caspase | MMP(e.g.TIMP) | NF-kB | p65 | AP-1 | IkB | TNF-α | PKA | NO | ROS | IL Receptor | IKK|
|Food Chem Toxicol. 2014 Mar;65:242-51. |
|Licochalcone B inhibits growth of bladder cancer cells by arresting cell cycle progression and inducing apoptosis.[Pubmed: 24384411]|
|To examine the mechanisms by which Licochalcone B (LCB) inhibits the proliferation of human malignant bladder cancer cell lines (T24 and EJ) in vitro and antitumor activity in vivo in MB49 (murine bladder cancer cell line) tumor model. |
METHODS AND RESULTS:
Exposure of T24 or EJ cells to LCB significantly inhibited cell lines proliferation in a concentration-dependent and time-dependent manner, and resulted in S phase arrest in T24 or EJ cells, respectively. LCB treatment decreased the expression of cyclin A, cyclin-dependent kinase (CDK1 and CDK2) mRNA, cell division cycle 25 (Cdc25A and Cdc25B) protein. In addition, LCB treatment down-regulated Bcl-2 and survivin expression, enhanced Bax expression, activated caspase-3 and cleaved poly (ADP-ribose) polymerase (PARP) protein. Consistently, the tumorigenicity of LCB-treated MB49 cells was limited significantly by using the colony formation assay in vitro and the MB49 tumor model performed in C57BL/6 mice in vivo.
These findings provide support for the use of LCB in chemoprevention and bladder cancer therapy.
|Int Immunopharmacol. 2009 Apr;9(4):499-507. |
|Glycyrrhiza inflata-derived chalcones, Licochalcone A, Licochalcone B and Licochalcone D, inhibit phosphorylation of NF-kappaB p65 in LPS signaling pathway.[Pubmed: 19291859]|
|Licorice root has been used as a traditional medicine for the treatment of gastric ulcer, bronchial asthma and inflammation. Licochalcone A is a major component of Xinjiang licorice, Glycyrrhiza inflata. |
METHODS AND RESULTS:
Previously we showed that Licochalcone A significantly inhibited LPS-induced NF-kappaB transcriptional activation by abrogating the phosphorylation of NF-kappaB p65 at serine 276. Glycyrrhiza inflata contains not only Licochalcone A but also Licochalcone B, Licochalcone C, Licochalcone D, Echinatin and Isoliquiritigenin, harboring the common structure of chalcones. No chalcones had any effect on LPS-induced IkappaB degradation, nuclear translocation and DNA binding activity of NF-kappaB p65; however, we observed that Licochalcone B and Licochalcone D significantly inhibited LPS-induced phosphorylation at serine 276 and transcriptional activation of NF-kappaB, the same as Licochalcone A. Interestingly, we also found that Licochalcone A, Licochalcone B and Licochalcone D effectively inhibited LPS-induced activation of PKA, which is required for the phosphorylation of NF-kappaB p65 at serine 276. Consequently, Licochalcone B and Licochalcone D significantly reduced the LPS-induced production of NO, TNFalpha and MCP-1. On the other hand, Licochalcone C, Echinatin and Isoliquitigenin failed to inhibit LPS-induced NF-kappaB activation.
These findings suggest that the anti-inflammatory effect of Glycyrrhiza inflata is ascribable to the potent inhibition of NF-kappaB by Licochalcone A, Licochalcone B and Licochalcone D.
|Chem Biol Interact. 2014 Oct 29;224C:142-148. |
|(E)-3-(3,4-dihydroxy-2-methoxyphenyl)-1-(2,4-dihydroxyphenyl)prop-2-en-1-one, a novel licochalcone B derivative compound, suppresses lipopolysaccharide-stimulated inflammatory reactions in RAW264.7 cells and endotoxin shock in mice.[Pubmed: 25451593]|
|Activated macrophages mediate inflammation, as they release nitric oxide and pro-inflammatory cytokines in various inflammatory diseases. Suppressing macrophage activation may alleviate inflammatory processes. |
METHODS AND RESULTS:
Here, we report that (E)-3-(3,4-dihydroxy-2-methoxyphenyl)-1-(2,4-dihydroxyphenyl)prop-2-en-1-one (DDP), a novel Licochalcone B derivative compound, inhibits inflammatory reactions in macrophages and protects mice from endotoxin shock. In vitro experiments showed that DDP suppressed the generation of nitric oxide and pro-inflammatory cytokines by suppressing the activation of nuclear factor-κB and activator protein-1 and simultaneously inhibited its upstream inflammatory signaling cascades in lipopolysaccharide in RAW264.7 cells. In an animal model, DDP protected BALB/c mice from lipopolysaccharide-induced endotoxin shock, possibly through inhibition of the production of inflammatory cytokines.
DDP inhibited the production of inflammatory mediators and may be a potential target for treatment of various inflammatory diseases.
|Oxid Med Cell Longev. 2014;2014:134862. |
|Cardioprotection against ischemia/reperfusion by licochalcone B in isolated rat hearts.[Pubmed: 25215172]|
|The generation of reactive oxygen species (ROS) is a major cause of heart injury induced by ischemia-reperfusion. The left ventricular developed pressure (LVDP) and the maximum up/down rate of left ventricular pressure (±dp/dt(max)) were documented by a physiological recorder. |
METHODS AND RESULTS:
Myocardial infarct size was estimated macroscopically using 2,3,5-triphenyltetrazolium chloride staining. Coronary effluent was analyzed for lactate dehydrogenase (LDH) and creatine kinase (CK) release to assess the degree of cardiac injury. The levels of C-reactive protein (CRP), interleukin-8 (IL-8), tumor necrosis factor-α (TNF-α), and interleukin-6 (IL-6) were analyzed to determine the inflammation status of the myocardial tissue. Cardiomyocyte apoptosis analysis was performed using the In Situ Cell Death Detection Kit, POD. Accordingly, Licochalcone B pretreatment improved the heart rate (HR), increased LVDP, and decreased CK and LDH levels in coronary flow. SOD level and GSH/GSSG ratio increased, whereas the levels of MDA, TNF-α, and CRP and activities of IL-8 and IL-6 decreased in Licochalcone B-treated groups. The infarct size and cell apoptosis in hearts from Licochalcone B-treated group were lower than those in hearts from the I/R control group.
Therefore, the cardioprotective effects of Licochalcone B may be attributed to its antioxidant, antiapoptotic, and anti-inflammatory activities.