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Bafilomycin A1
CAS No. : 88899-55-2
MCE 国际站:Bafilomycin A1
产品活性:Bafilomycin A1 (BafA1) 是特异性,可逆的 V-ATPase 抑制剂,IC50 值为 4-400 nmol/mg。Bafilomycin A1,大环内酯类抗生素, 是一种自噬 (autophagy) 晚期阶段抑制剂。Bafilomycin A1 阻断自噬体与溶酶体的融合,并抑制培养细胞溶酶体中的酸化和蛋白质降解。Bafilomycin A1 也诱导调亡 (apoptosis)。
研究领域:Membrane Transporter/Ion Channel | Autophagy | Anti-infection | Apoptosis
作用靶点:Proton Pump | Autophagy | Antibiotic | Bacterial | Apoptosis
In Vitro: Bafilomycin A1 is treated to different types of membrane ATPases with the I50 of 400 nmol/mg, 4 nmol/mg and 50 nmol/mg for the vacuolar ATPases of a fungus (N. crassa), a plant (Z. mays), and an animal (bovine abrenal medulla). The I50 values refer as μmol of Bafilomycin A1 per mg of protein giving 50% inhibition of ATPase activity.
Bafilomycin A1 ((-)-Bafilomycin A1) disrupts autophagic flux by inhibiting both V-ATPase-dependent acidification and Ca-P60A/SERCA-dependent autophagosome-lysosome fusion.
Bafilomycin A1 at a low concentration (1 nM) effectively and specifically inhibits and kills pediatric B-cell acute lymphoblastic leukemia cells. It targets both early and late stages of the autophagy pathway, mitochondria and induces caspase-independent apoptosis. Bafilomycin A1 induces the binding of Beclin 1 to Bcl-2, which further inhibits autophagy and promotes apoptotic cell death.
The growth of the BEL-7402 hepatocellular carcinoma and HO-8910 ovarian cancer cell lines are retarded and the metastatic potential is inhibited by Bafilomycin A1. Transmission electron microscopy and assays of capsase-3 and -9 suggest that Bafilomycin A1 induces apoptosis.
Bafilomycin A1 inhibits the growth of a variety of cultured cells dose-dependently, including golden hamster embryo and NIH-3T3 fibroblasts, whether or not they are transformed, and PC12 and HeLa cells. The IC50 of Bafilomycin A1 for inhibition of cell growth ranges from 10 to 50 nM.
In Vivo: Chronic treatment with low-dose Bafilomycin A1 (0.1 mg/kg) slightly inhibits the tumor volume, but the final tumor volume does not differ significantly from the control. However, chronic treatment with high dose Bafilomycin A1 (1 mg/kg) inhibits the tumor growth significantly, compared with controls, after 21 days.
Bafilomycin A1 (0.1 mg/kg or 1 mg/kg; i.p. daily for 3 days) extends the survival of B-cell acute lymphoblastic leukemia (B-ALL) xenograft mice with advanced disease.
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