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Salinomycin

CAS No. : 53003-10-4

MCE 站：Salinomycin

产品活性：Salinomycin (Procoxacin)，一种钾离子载体抗生素，选择性抑制革兰氏阳性菌的生长 (gram-positive bacteria)。Salinomycin 是 Wnt/β-catenin 信号传导的有效抑制剂，阻断 Wnt 诱导的 LRP6 磷酸化。Salinomycin (Procoxacin) 选择性抑制人肿瘤干细胞。

研究领域：Anti-infection  |  Stem Cell/Wnt  |  Autophagy  |  Apoptosis

作用靶点：Bacterial  |  Wnt  |  β-catenin  |  Mitophagy  |  Autophagy  |  Apoptosis  |  Antibiotic

In Vitro: Salinomycin is a potent inhibitor of the Wnt signaling cascade. Incubation of the malignant lymphocytes with Salinomycin induces apoptosis within 48 h, with a mean IC₅₀ of 230 nM. Salinomycin is also an antibiotic potassium ionophore, has been reported recently to act as a selective breast cancer stem cell inhibitor.
Salinomycin is a novel and an effective anticancer drug, inhibits SW620 cells and Cisp-resistant SW620 cells with IC₅₀ of 1.54±0.23 μM and 0.32±0.05 μM, respectively. Salinomycin is found to have the ability to kill both cancer stem cells (CSCs) and therapy-resistant cancer cells. After continuous Salinomycin treatment for 48 h, the apoptotic cells are observed under the microscope and counted randomly at least 100 cells in one field. The number of apoptotic cells which are stained by Hoechst33342 is significantly increased in Cisp-resistant SW620 cells (20.20±3.72) than that of SW620 cells (9.40±2.07) per 100 cells (p<0.05). After treatment with Salinomycin for 48 h, flow cytometric analysis is used to detect the cell apoptosis both in SW620 cells and Cisp-resistant SW620 cells. The cell apoptotic rate in Cisp-resistant SW620 cells (37.82±3.63%) is significantly higher than that of SW620 cells (16.78±2.56%) (p<0.05).

In Vivo: After administration of 4 mg/kg Salinomycin (Sal), 8 mg/kg Salinomycin and 10 uL/g saline water for 6 weeks, the mice are sacrificed. The size of the liver tumors in the Salinomycin treatment groups diminishes compare with the control group. The mean diameter of the tumors decreases from 12.17 mm to 3.67 mm (p<0.05) and the mean volume (V=length×width²×0.5) of the tumors decreases from 819 mm³ to 25.25 mm³ (p<0.05). Next, the tumors are harvested, followed by HE staining, immunohistochemistry, and TUNEL assays, to assess the anti-tumor activity of Salinomycin. HE staining shows that the structure of the liver cancer tissue:nuclei of different sizes, hepatic cord structure is destroyed. Immunohistochemistry shows that PCNA expression is lower after Salinomycin treatment. HE staining and TUNEL assays indicates the Salinomycin-treated groups has higher apoptosis rates than control. Furthermore, immunohistochemistry shows an increased Bax/Bcl-2 ratio after Salinomycin treatment. The protein expression of β-catenin decreases in the Salinomycin treatment groups compared with control.
Salinomycin is a kind of monocarboxylic acid polyether type antibiotics, produced by the fermentation of Streptomyces albus, possesses a specific cyclic structure, and can form a complex compound with the pathogenic microorganisms and the extracellular cations of coccidian, especially K⁺, Na⁺, Rb⁺, to alter the intracellular and extracellular ion concentrations.

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