"目录号: HY-14393

Cell Cycle/DNA DamageStem Cell/WntAutophagy-

Emodin 是一种广谱抗癌剂。Emodin 抑制蛋白激酶CK2 (IC50为 2 μM。

Casein KinaseAutophagy

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生物活性

Description

Emodin is a broad-spectrum anticancer agent. Emodin inhibitscasein kinaseII (CKII) activity withIC50of 2 μM.

IC50& Target

IC50: 2 μM (CKII)[1]

In Vitro

Emodin, an anthraquinone derivative, selectively inhibits casein kinase II(CKII), a Ser/Thr kinase, as a competitive inhibitor. Emodin inhibits CKII activity with IC50of 2 μM, which is two to three orders of magnitude lower than those against the other kinases. Enzyme kinetic assays show that Emodin inhibits CKII activity as acompetitive inhibitor against ATP with Kiof 7.2 μM[1]. Emodin is a broad-spectrum inhibitory agent of cancer cells, including leukemia, lung cancer, human tongue squamous cancer, colon cancer, gallbladder cancer, pancreatic cancer, breast cancer, human cervical cancer and hepatic carcinoma cells. Emodin inhibits A549, HepG2, OVCAR-3, HeLa and Madin-Darby Canine Kidney (MDCK) cells with IC50of 19.54, 12.79, 25.82, 12.14 and 5.81 μg/mL. The anticancer mechanisms of Emodin are involved in many biological pathways, such as casein kinase II and ERK1/2[2]. Emodin is applied as a Reactive oxygen species (ROS) generator in combination with cisplatin in T24 and J82 human bladder cancer cells. Emodin kills T24 and J82 cells in the dose-dependent and time-dependent manner, and it is less toxic to HCV-29 cells. The concentration of 20 and 15 μM is selected as appropriate doses for investigating chemotherapeutic sensitivity of T24 and J82 cells at 24 h, respectively[3].

In Vivo

Mice treated with Emodin (50 mg/kg) and Cisplatin (1 mg/kg) have significantly smaller tumors than those from the other groups. In addition, no notable differences on the body weight loss are observed among groups and no obvious necrosis and abnormity are observed in the sections of liver, kidney and heart. These results demonstrate that Emodin/cisplatin co-treatment can significantly suppress tumor growth in vivo with no distinct side effects. Consistent with in vitro experiment, TUNEL assay shows that Emodin/cisplatin combination significantly increased cell apoptosis in xenograft tumors. Emodin/Cisplatin co-treatment group also has lower MRP1 expression than the other groups[3].

Clinical Trial

NCT00801268

Zhi-Hong Liu, M.D.-Nanjing University School of Medicine

Polycystic Kidney

November 2008

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References

[1].Yim H, et al. Emodin, an anthraquinone derivative isolated from the rhizomes of Rheum palmatum, selectively inhibits the activity of casein kinase II as a competitive inhibitor. Planta Med. 1999 Feb;65(1):9-13.

[2].Xing JY, et al. Antitumor Effects and Mechanism of Novel Emodin Rhamnoside Derivatives against Human Cancer CellsIn Vitro. PLoS One. 2015 Dec 18;10(12):e0144781.

[3].Li X, et al. Emodin enhances cisplatin-induced cytotoxicity in human bladder cancer cells through ROS elevation and MRP1 downregulation. BMC Cancer. 2016 Aug 2;16:578.