Selective, Tight-Binding Inhibitors of Integrin α4β1 That Inhibit Allergic Airway Responses
作者:Ko-chung Lin、Humayun S. Ateeq、Sherry H. Hsiung、Lillian T. Chong、Craig N. Zimmerman、Alfredo Castro、Wen-cherng Lee、Charles E. Hammond、Sandhya Kalkunte、Ling-Ling Chen、R. Blake Pepinsky、Diane R. Leone、Andrew G. Sprague、William M. Abraham、Alan Gill、Roy R. Lobb、Steven P. Adams
DOI:10.1021/jm980673g
日期:1999.3.1
development of nonspecific airway hyperresponsiveness to carbachol. These results show that highly selective and potent small-molecule antagonists can be identified to integrins with primary specificity for peptide domains other than Arg-Gly-Asp (RGD); they confirm the generality of integrins as smallmolecule targets; and they validate alpha4beta1 as a therapeutic target for asthma.
整联蛋白α4beta1介导白细胞募集,激活,介质释放和凋亡抑制,并且它在炎症病理生理学中发挥着核心作用。描述了基于来自细胞纤连蛋白交替剪接的连接段1(CS-1)肽的Leu-Asp-Val(LDV)序列的高亲和力,选择性的alpha4beta1抑制剂,该抑制剂采用了新型N端肽“上限”策略。一种抑制剂BIO-1211的效价比起始肽高约10(6)倍,并表现出紧密结合的特性(koff = 1.4 x 10(-4)s-1,KD = 70 pM),这是一个了不起的发现用于蛋白质受体的非共价小分子抑制剂。BIO-1211对激活形式的alpha4beta1也具有200倍的选择性,并且它刺激整联蛋白beta1亚基上配体诱导的表位的表达,与受体的配体结合位点的占有率一致的性质。用3毫克雾化剂量的BIO-1211预处理过敏羊可抑制抗原攻击后的早期和晚期气道反应,并防止非特异性气道对卡巴胆碱的过度反应。这些结果表