Inhibition of Btk with CC-292 Provides Early Pharmacodynamic Assessment of Activity in Mice and Humans
作者:Erica K. Evans、Richland Tester、Sharon Aslanian、Russell Karp、Michael Sheets、Matthew T. Labenski、Steven R. Witowski、Heather Lounsbury、Prasoon Chaturvedi、Hormoz Mazdiyasni、Zhendong Zhu、Mariana Nacht、Martin I. Freed、Russell C. Petter、Alex Dubrovskiy、Juswinder Singh、William F. Westlin
DOI:10.1124/jpet.113.203489
日期:2013.8
Targeted therapies that suppress B cell receptor (BCR) signaling have emerged as promising agents in autoimmune disease and B cell malignancies. Bruton’s tyrosine kinase (Btk) plays a crucial role in B cell development and activation through the BCR signaling pathway and represents a new target for diseases characterized by inappropriate B cell activity. N -(3-(5-fluoro-2-(4-(2-methoxyethoxy)phenylamino)pyrimidin-4-ylamino)phenyl)acrylamide (CC-292) is a highly selective, covalent Btk inhibitor and a sensitive and quantitative assay that measures CC-292-Btk engagement has been developed. This translational pharmacodynamic assay has accompanied CC-292 through each step of drug discovery and development. These studies demonstrate the quantity of Btk bound by CC-292 correlates with the efficacy of CC-292 in vitro and in the collagen-induced arthritis model of autoimmune disease. Recently, CC-292 has entered human clinical trials with a trial design that has provided rapid insight into safety, pharmacokinetics, and pharmacodynamics. This first-in-human healthy volunteer trial has demonstrated that a single oral dose of 2 mg/kg CC-292 consistently engaged all circulating Btk protein and provides the basis for rational dose selection in future clinical trials. This targeted covalent drug design approach has enabled the discovery and early clinical development of CC-292 and has provided support for Btk as a valuable drug target for B-cell mediated disorders.
针对抑制B细胞受体(BCR)信号传导的靶向疗法已成为自身免疫疾病和B细胞恶性肿瘤中有前景的治疗剂。布鲁顿酪氨酸激酶(Btk)在B细胞的发育和激活中通过BCR信号传导通路发挥着关键作用,代表了针对不适当B细胞活动所特征化疾病的新靶点。N -(3-(5-氟-2-(4-(2-甲氧基乙氧基)苯基氨基)pyrimidin-4-基氨基)苯基)丙烯酰胺(CC-292)是一种高选择性、共价性的Btk抑制剂,并且已经开发出一种敏感且定量的测定方法来测量CC-292与Btk的结合。这种转化药效学检测伴随CC-292经历了每一个药物发现和开发的步骤。这些研究表明,CC-292结合的Btk数量与CC-292在体外及胶原诱导性关节炎自身免疫疾病模型中的疗效相关。最近,CC-292已进入人类临床试验,试验设计为迅速提供安全性、药代动力学和药效学的洞察。这项首次在健康志愿者中进行的试验显示,单次口服2 mg/kg CC-292剂量能够持续结合所有循环的Btk蛋白,为未来临床试验中的合理剂量选择提供了依据。这种靶向共价药物设计方法促进了CC-292的发现和早期临床开发,并为Btk作为B细胞介导疾病的宝贵药物靶点提供了支持。