ONO-4059 (HYDROCHLORIDE)

Tirabrutinib Hydrochloride (ONO-4059, GS-4059) 是一种高度有效的、选择性的BTK抑制剂，IC50为2.2 nM。

Target	Value
BTK	2.2 nM

相较于Lck、 Fyn、LynA，ONO-4059对BTK的选择性更大，并只以浓度依赖性方式抑制anti-IgM诱导的B细胞激活，而不抑制anti-CD3/CD28诱导的人类PBMCs向T淋巴细胞的激活。ONO/GS-4059在一些恶性B细胞中抑制细胞增殖，但也在纳摩尔浓度范围内，诱导TMD8细胞的经典凋亡反应。

在CIA小鼠模型中，ONO-4059通过抑制炎性趋化因子和单核细胞中细胞因子如IL-6、IL-8、TNFalpha等的产生，发挥疗效，同时伴随软骨侵蚀、骨损伤、血管翳形成的消退。在临床前动物模型和临床CLL、NHL患者中，ONO-4059具有抗肿瘤活性，安全性良好，药效长久。 一种有效的口服活性的BTK(布鲁顿酪氨酸激酶)抑制剂, IC50:2.2nM。Tirabrutinib HCl is a potent and orally active Bruton agammaglobulinemia tyrosine kinase (BTK) in hibitor. Upon administration, ONO-4059 covalently binds to BTK within B cells, thereby preventing B-cell receptor signaling and impeding B-cell development. As a result, this agent may inhibit the proliferation of B-cell malignancies. BTK, a cytoplasmic tyrosine kinase and member of the Tec family of kinases, plays an important role in B lymphocyte development, activation, signaling, proliferation and survival.