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中文名称:阿特珠单抗中文同义词:阿特朱单抗;阿特珠单抗;达雷木单抗;阿替唑单抗英文名称:AtezolizumChemicalbookab英文同义词:Atezolizumab;MPDL3280A;Atezolizumab(anti-PD-L1)产品描述阿特珠单抗类似物是一种Fc工程化的、人源化的单克隆抗体,它与PD-L1结合,阻断与PD-1和B7.1受体的相互作用,是一种非糖基化IgG1 kappa免疫球蛋白,其分子质量为145 kDa,由中国仓鼠卵巢细胞生产。性质Name Biosimilar of AtezolizumabCAS NO. 1380723-44-3Type Whole antibodySource HumanizedTarget PD-L1Clone MonocloneMolecular Weight 145 kDaFormula C6446H9902N1706O1998S42Antibody Form Purified immunoglobulinPhysical Form SolutionGrade Standard Medicine GradeStorage -70±15℃ for long-term storage, 2-8℃ for short-term storage, away from light.生物活性体外研究:Atezolizumab的主要特征是,它是一种FcγR结合缺陷的抗体抑制剂,它不能与吞噬细胞上的Fc受体结合,因而不会引起抗体依赖性的细胞毒性(ADCC)。Atezolizumab的处理会引起细胞因子的改变,包括IL-18, IFNγ, CXCL11的瞬时增加和IL-6的瞬时减少。处于增殖状态的CD8+ T细胞数目在atezolizumab处理后会增多。体内研究:Atezolizumab通过阻止PD-L1/PD-1免疫检查点,减少肿瘤微环境中的免疫抑制信号,同时增强T细胞介导的对抗肿瘤的免疫反应。最开始对Atezolizumab的药代动力学的研究在cynomolgus monkeys和小鼠中进行,其分布容积约为血浆中体积。给药24小时后,atezolizumab在体内生物分布于脾脏、肾脏、肝脏、心脏和肌肉(按数量级排序)。在携瘤动物中,Atezolizumab也会在肿瘤中积累,最开始是在肿瘤的推挤边界(pushing order),进而向肿瘤核心区域进展,尤其是肿瘤坏死时。Atezolizumab的药代动力曲线是剂量依赖性的(非线性)。给药后24-48小时,当血浆浓度>0.5 μg/mL时,循环的CD4和CD8 T细胞中,PD-L1受体被atezolizumab占据饱和。Atezolizumab与PD-L1的结合亲和力在猴子和人类中类似。(适用于人源及非人源化小鼠)实验操作 来自于公开的文献,仅供相同实验参考(如实验材料、目的不同,请参考其他文献)细胞实验细胞系 DCCIKs lymphocytes方法 The in vitro cytotoxicity of the DCCIKs used as effector cells in the absence or presence of 5 μg/mL MPDL3280A against CaSki cells employed as target cells at a ratio of 10:1, 30:1 and 90:1 was determined using a CCK8 kit. The effector and target cells were added to 96-well plates and incubated for 24 h. The groups comprising a mixture of cell types were the experimental groups, whereas the control groups contained only one cell type of the CaSki cells, DCCIKs or 1640 RPMI cultivating solution. The CCK8 assay was performed in triplicate and optical density (OD) was read at 570 nm.浓度 5 μg/mL处理时间 24 h动物实验动物模型 Cynomolgus monkeys配制 20 mM his-acetate, 0.02% polysorbate 20, 240 mM sucrose, pH 5.5剂量 0.5, 5 and 20 mg/kg给药处理 i.v.不同实验动物依据体表面积的等效剂量转换表(数据来源于FDA指南) 小鼠 大鼠 兔 豚鼠 仓鼠 狗重量 (kg) 0.02 0.15 1.8 0.4 0.08 10体表面积 (m2) 0.007 0.025 0.15 0.05 0.02 0.5Km 系数 3 6 12 8 5 20动物 A (mg/kg) = 动物 B (mg/kg) × 动物 B的Km系数动物 A的Km系数例如,依据体表面积折算法,将白藜芦醇用于小鼠的剂量22.4 mg/kg 换算成大鼠的剂量,需要将22.4 mg/kg 乘以小鼠的Km系数(3),再除以大鼠的Km系数(6),得到白藜芦醇用于大鼠的等效剂量为11.2 mg/kg。参考文献A human programmed death-ligand 1-expressing mouse tumor model for evaluating the therapeutic efficacy of anti-human PD-L1 antibodies.Huang A, et al. Sci Rep. 2017 Feb 16;7:42687. PMID: 28202921.PD-L1 Detection in Tumors Using [(64)Cu]Atezolizumab with PET.Lesniak WG, et al. Bioconjug Chem. 2016 Sep 21;27(9):2103-10. PMID: 27458027.Atezolizumab versus docetaxel for patients with previously treated non-small-cell lung cancer (POPLAR): a multicentre, open-label, phase 2 randomised controlled trial.Fehrenbacher L, et al. Lancet. 2016 Apr 30;387(10030):1837-46. PMID: 26970723.A humanized antibody for imaging immune checkpoint ligand PD-L1 expression in tumors.Chatterjee S, et al. Oncotarget. 2016 Mar 1;7(9):10215-27. PMID: 26848870.单抗药物对照品贝伐单抗,Bevacizumab 纳武单抗,Nivolumab帕妥珠单抗,Pertuzumab 曲妥珠单抗,Trastuzumab阿达木单抗,Adalimumab 帕姆单抗,Pembrolizumab迪诺苏单抗,Denosumab 阿替唑单抗,Atezolizumab优特克诺单抗,Ustekinumab 维多珠单抗,Vedolizumab1、33个产品,三种规格:1mg,2mg,5mg;2、价格优,全现货;3、科研产品,仅用科研,禁用临床;Supplier供应商:BioVector NTCC质粒载体菌株细胞蛋白抗体基因保藏中心电话:010-53513060网址http://www.biovector.net
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