申请人:Aventis Pharmaceuticals, Inc.
公开号:EP1384725A2
公开(公告)日:2004-01-28
The invention provides compounds which specifically inhibit factor Xa activity. The compounds consist of the structure X1-YIR-X2, wherein X1 is H, acyl, alkyl, acylalkyl, arylalkyl or one or more amino acids, and X2 is a modified C-terminal group, one or more carboxy-protecting groups or one or more amino acids or other substituent, and Y, I and R are tyrosine, isoleucine and arginine, respectively, or peptidomimetic or organic structures that possess the same functional activity as Y, I and R, respectively. In addition, the present invention provides a compound having the structure A1-A2-(A3)m-B, where m is 0 or 1. A compound of the invention can be linear or cyclic and can be about 2 and 43 residues in length. A compound of the invention is characterized, in part, in that it exhibits a specific inhibition of factor Xa activity with a Ki of ≤ 100 µM, preferably ≤ 2 nM, and does not substantially inhibit the activity of other proteases involved in the coagulation cascade. The invention further provides methods of specifically inhibiting the activity of factor Xa and of inhibiting blood clotting in vitro and in an individual and methods of detecting factor Xa levels or activity.
本发明提供了特异性抑制 Xa 因子活性的化合物。这些化合物由结构 X1-YIR-X2 组成,其中 X1 是 H、酰基、烷基、酰烷基、芳烷基或一个或多个氨基酸,X2 是修饰的 C-末端基团、一个或多个羧基保护基团或一个或多个氨基酸或其他取代基,Y、I 和 R 分别是酪氨酸、异亮氨酸和精氨酸,或分别具有与 Y、I 和 R 相同功能活性的拟肽结构或有机结构。此外,本发明还提供了一种具有 A1-A2-(A3)m-B 结构的化合物,其中 m 为 0 或 1。本发明的化合物可以是线性或环状的,长度可以是约 2 至 43 个残基。本发明化合物的部分特征在于,它对 Xa 因子活性具有特异性抑制作用,Ki ≤ 100 µM,优选 ≤ 2 nM,并且不会对参与凝血级联的其他蛋白酶的活性产生实质性抑制作用。本发明进一步提供了特异性抑制 Xa 因子活性和抑制体外及个体凝血的方法,以及检测 Xa 因子水平或活性的方法。