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和 EGFR 的活性,IC50 值分别为 59 nM 和 92 nM。",{"key":242,"value":243},"相关类别","信号通路\n>>\nJAK\u002FSTAT信号通路\n>>\nEGFR\n信号通路\n>>\n蛋白酪氨酸激酶\n>>\nEGFR\n研究领域\n>>\n癌症",{"key":245,"value":246},"靶点","EGFR:92 nM (IC50)\nHER2:59 nM (IC50)",{"key":248,"value":249},"体外研究","Neratinib对酪氨酸激酶KDR和Src具有抑制作用,IC50分别为0.8μM和1.4μM,与HER2相比,活性降低14倍和24倍。 Neratinib对其他丝氨酸-苏氨酸激酶没有活性,如Akt,细胞周期蛋白D1\u002Fcdk4,细胞周期蛋白E\u002Fcdk2,细胞周期蛋白B1\u002Fcdk1,IKK-2,MK-2,PDK1,c-Raf和Tpl-2,以及作为酪氨酸激酶c-Met。 Neratinib选择性抑制转染HER2(3T3\u002Fneu)的3T3细胞以及另外两种HER-2过表达SK-Br-3和BT474细胞的增殖,IC50值为2-3 nM,显示> 230倍与未转染的3T3细胞以及EGFR-和HER2-阴性的MDA-MB-435和SW620相比具有效力。 Neratinib还抑制EGFR依赖性A431细胞的增殖,IC50为81 nM。 Neratinib降低BT474细胞中HER2受体的自身磷酸化,IC50为5 nM,A431细胞中EGFR依赖于EGFR的磷酸化,IC50为3 nM。 Neratinib阻断HER-2导致下游MAPK和Akt通路的抑制,IC50为2 nM,比曲妥珠单抗更有效。 Neratinib抑制BT474细胞中细胞周期蛋白D1的表达和Rb易感基因的磷酸化,IC50为9 nM,导致G1-S停滞,最终导致细胞增殖减少[1]。",{"key":251,"value":252},"体内研究","口服治疗的neratinib显着抑制3T3\u002Fneu异种移植物的生长,分别在10,20,40和80mg\u002Fkg \u002F天的剂量下抑制34％,53％,98％和98％。与在40mg\u002Fkg 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Tris中，并在450nM下测量吸光度。从抑制曲线确定抑制细胞增殖50％的Neratinib浓度（IC 50）。",{"key":260,"value":261},"动物实验","将肿瘤细胞（维持在组织培养物中）或肿瘤片段皮下植入雌性无胸腺（裸）小鼠的侧腹。对于雌激素依赖性细胞系（BT474，MCF-7和SK-OV-3），在植入肿瘤前1周，给动物植入激素颗粒（0.72mg 17-β雌二醇，60天释放）。另外，将SK-OV-3细胞悬浮在Matrigel基底膜基质中用于植入。在将动物随机分配到不同治疗组（分期，第0天）后，在肿瘤达到90-200mg的大小后开始治疗。对于3T3 \u002F neu异种移植物，在肿瘤植入后第二天（第0天）开始治疗。 HKI-272在0.5％甲基纤维素-0.4％聚山梨醇酯-80（吐温80）中配制，并通过管饲法每日口服施用。每7天测定肿瘤质量[（长度×宽度2）\u002F 2]。除3T3 \u002F neu外，所有异种移植研究中的肿瘤生长表示为相对肿瘤生长：第0天平均肿瘤质量与平均肿瘤质量的比率。相对于载体处理的对照计算肿瘤生长的抑制。在数据的对数转换后使用单尾学生t检验（等方差）证明抑制的统计显着性。",{"key":263,"value":264},"参考文献","[1].\nRabindran SK, et al. 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