塔妥珠单抗 T76883

Product Introduction
Bioactivity


英文名: Talacotuzumab

描述: Talacotuzumab (JNJ 56022473) 是一种含有修饰的 Fc 结构的IgG1 型完全人源化的 CD123 中和单克隆抗体。Talacotuzumab 对 CD123、CD32b/c、CD16-158F、CD16-158V 具有很高的亲和力， KD 分别为 0.43 nM、188 nM、46 nM、16.8 nM。Talacotuzumab 通过抑制 IL-3 与 CD123 结合进而抑制靶细胞中的 IL-3 信号传导。Talacotuzumab 诱导 Fc 区发生突变以增加对 CD16 (FcγRIIIa) 的亲和力，从而加强抗体依赖性细胞介导的细胞毒性 (ADCC)。Talacotuzumab 急性髓性白血病 (AML) 异种移植小鼠模型中抑制白血病细胞生长。

体外活性: With an IC50 of 5 ng/ml (33 pM), Talacotuzumab (JNJ 56022473; CSL 362) potently mediates antibody-dependent cell-mediated cytotoxicity (ADCC) in TF-1 cells [1].Following a 24-hour pretreatment at 1 μg/ml,Talacotuzumab inhibits the production of IFN-α in plasmacytoid dendritic cells and eosinophils in SLE (systemic lupus erythematosus) donor and healthy donor plasma-like dendritic cells. This inhibition occurs when these cells are stimulated with TLR7 (imiquimod; 0.5 μM; 6 days) and TLR9 (CpG C; 0.5 μM; 6 days). However, Talacotuzumab does not significantly reduce IFN-α production induced by TLR4 stimulation (LPS; 10 μg/ml). The inhibitory effect of Talacotuzumab on plasmacytoid dendritic cell (pDC) proliferation and expansion induced by TLR7 and TLR9 is achieved through the depletion of pDC [2].

体内活性: In mice with xenografts of acute myeloid leukemia,Talacotuzumab (JNJ 56022473; CSL 362; 300 μg; intraperitoneal injection; three times per week for 5 weeks) significantly delays tumor growth compared to the isotype control [1].Talacotuzumab (1, 10, 30 mg/kg; subcutaneous injection; single dose) in juvenile cynomolgus monkeys reaches maximum serum concentrations of 12, 190, and 380 μg/ml at doses of 1, 10, and 30 mg/kg, respectively, within 48 hours [2].

存储条件: store at low temperaturestore at -80°C

关键字: CSL362 | CSL-362 | JNJ-56022473 | JNJ56022473 | Talacotuzumab

相关产品: Meranzin | Tamarixetin | Bucolome | Thymulin | Anti-inflammatory agent 35 | Glimepiride sulfonamide | Glycyrrhisoflavone | Bryodulcosigenin | Arnidiol | Dehydropachymic acid

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注：该产品未在中华人民共和国食品药品监督管理部门申请医疗器械注册和备案，不可用于临床诊断或治疗等相关用途