中文名稱:阿特珠單抗中文同義詞:阿特朱單抗;阿特珠單抗;達(dá)雷木單抗;阿替唑單抗英文名稱:AtezolizumChemicalbookab英文同義詞:Atezolizumab;MPDL3280A;Atezolizumab(anti-PD-L1)產(chǎn)品描述阿特珠單抗類似物是一種Fc工程化的、人源化的單克隆抗體,它與PD-L1結(jié)合,阻斷與PD-1和B7.1受體的相互作用,是一種非糖基化IgG1 kappa免疫球蛋白,其分子質(zhì)量為145 kDa,由中國倉鼠卵巢細(xì)胞生產(chǎn)。性質(zhì)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.生物活性體外研究:Atezolizumab的主要特征是,它是一種FcγR結(jié)合缺陷的抗體抑制劑,它不能與吞噬細(xì)胞上的Fc受體結(jié)合,因而不會引起抗體依賴性的細(xì)胞毒性(ADCC)。Atezolizumab的處理會引起細(xì)胞因子的改變,包括IL-18, IFNγ, CXCL11的瞬時增加和IL-6的瞬時減少。處于增殖狀態(tài)的CD8+ T細(xì)胞數(shù)目在atezolizumab處理后會增多。體內(nèi)研究:Atezolizumab通過阻止PD-L1/PD-1免疫檢查點,減少腫瘤微環(huán)境中的免疫抑制信號,同時增強T細(xì)胞介導(dǎo)的對抗腫瘤的免疫反應(yīng)。最開始對Atezolizumab的藥代動力學(xué)的研究在cynomolgus monkeys和小鼠中進(jìn)行,其分布容積約為血漿中體積。給藥24小時后,atezolizumab在體內(nèi)生物分布于脾臟、腎臟、肝臟、心臟和肌肉(按數(shù)量級排序)。在攜瘤動物中,Atezolizumab也會在腫瘤中積累,最開始是在腫瘤的推擠邊界(pushing order),進(jìn)而向腫瘤核心區(qū)域進(jìn)展,尤其是腫瘤壞死時。Atezolizumab的藥代動力曲線是劑量依賴性的(非線性)。給藥后24-48小時,當(dāng)血漿濃度>0.5 μg/mL時,循環(huán)的CD4和CD8 T細(xì)胞中,PD-L1受體被atezolizumab占據(jù)飽和。Atezolizumab與PD-L1的結(jié)合親和力在猴子和人類中類似。(適用于人源及非人源化小鼠)實驗操作 來自于公開的文獻(xiàn),僅供相同實驗參考(如實驗材料、目的不同,請參考其他文獻(xiàn))細(xì)胞實驗細(xì)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.濃度 5 μg/mL處理時間 24 h動物實驗動物模型 Cynomolgus monkeys配制 20 mM his-acetate, 0.02% polysorbate 20, 240 mM sucrose, pH 5.5劑量 0.5, 5 and 20 mg/kg給藥處理 i.v.不同實驗動物依據(jù)體表面積的等效劑量轉(zhuǎn)換表(數(shù)據(jù)來源于FDA指南) 小鼠 大鼠 兔 豚鼠 倉鼠 狗重量 (kg) 0.02 0.15 1.8 0.4 0.08 10體表面積 (m2) 0.007 0.025 0.15 0.05 0.02 0.5Km 系數(shù) 3 6 12 8 5 20動物 A (mg/kg) = 動物 B (mg/kg) × 動物 B的Km系數(shù)動物 A的Km系數(shù)例如,依據(jù)體表面積折算法,將白藜蘆醇用于小鼠的劑量22.4 mg/kg 換算成大鼠的劑量,需要將22.4 mg/kg 乘以小鼠的Km系數(shù)(3),再除以大鼠的Km系數(shù)(6),得到白藜蘆醇用于大鼠的等效劑量為11.2 mg/kg。參考文獻(xiàn)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.單抗藥物對照品貝伐單抗,Bevacizumab 納武單抗,Nivolumab帕妥珠單抗,Pertuzumab 曲妥珠單抗,Trastuzumab阿達(dá)木單抗,Adalimumab 帕姆單抗,Pembrolizumab迪諾蘇單抗,Denosumab 阿替唑單抗,Atezolizumab優(yōu)特克諾單抗,Ustekinumab 維多珠單抗,Vedolizumab1、33個產(chǎn)品,三種規(guī)格:1mg,2mg,5mg;2、價格優(yōu),全現(xiàn)貨;3、科研產(chǎn)品,僅用科研,禁用臨床;Supplier供應(yīng)商:BioVector NTCC質(zhì)粒載體菌株細(xì)胞蛋白抗體基因保藏中心電話:010-53513060網(wǎng)址http://www.biovector.net