Synthetic Dipeptide, N-Stearoyl-D-Ser-L-Pro-OEt, Induces Release of Tissue-Type Plasminogen-Activator in Cultured Cells and in Experimental Animals.
作者:Toru OKAYAMA、Masaharu NAKANO、Shinjiro ODAKE、Masaki HAGIWARA、Tadanori MORIKAWA、Shigeru UESHIMA、Kiyotaka OKADA、Hideharu FUKAO、Osamu MTSUO
DOI:10.1248/cpb.42.1854
日期:——
The tissue-type plasminogen activator (t-PA)-releasing action of synthetic dipeptides containing Gly, Ser or Pro was investigated. Among 10 dipeptides, Boc-L-Ser-L-Pro-OH and H-L-Ser-L-Pro-OH induced t-PA release in vitro, but the others were inactive. Since Boc-L-Ser-L-Pro-OH was more effective than H-L-Ser-L-Pro-OH, 7 related dipeptides with N-acylation were synthesized. Five of them enhanced the release of t-PA; N-stearoyl-L-Ser-L-Pro-OH (FK-5) had the greatest effect. Four compounds were further examined for activity to enhance the release of t-PA in rats. FK-5 produced a two-fold increase in fibrinolytic activity, and N-palmitoyl-L-Ser-L-Pro-OH (FK-4) also markedly enhanced the release of t-PA. Since FK-5 caused severe hemolysis, 7 analogues of FK-5 were synthesized. All of them enhanced the release of t-PA from melanoma (Bowes) cells. In rats, FK-5, N-stearoyl-D-Ser-L-Pro-OH (FK-8) and N-stearoyl-D-Ser-L-Pro-OEt (FK-10) enhanced the fibrinolytic activity two-fold. FK-5 and FK-8 also exhibited strong hemolytic activity, but FK-10 did not induce hemolysis. Therefore, FK-10 was examined in rabbits. After the injection of this compound, the fibrinolytic activity in the euglobulin fraction was markedly enhanced without accompanying hemolysis. Thus, FK-10 potently enhances fibrinolytic activity both in vitro and in vivo.
研究了含Gly、Ser或Pro的合成二肽的组织型纤溶酶原激活剂(t-PA)释放作用。在 10 种二肽中,Boc-L-Ser-L-Pro-OH 和 H-L-Ser-L-Pro-OH 可在体外诱导 t-PA 释放,而其他二肽则没有活性。由于Boc-L-Ser-L-Pro-OH比H-L-Ser-L-Pro-OH更有效,因此合成了7种相关的N-酰化二肽。其中五种能增强 t-PA 的释放;N-硬脂酰基-L-Ser-L-Pro-OH(FK-5)的作用最大。研究人员进一步检测了四种化合物在促进大鼠释放 t-PA 方面的活性。FK-5 的纤溶活性提高了两倍,N-棕榈酰-L-Ser-L-Pro-OH(FK-4)也显著增强了 t-PA 的释放。由于 FK-5 会导致严重溶血,因此合成了 7 种 FK-5 类似物。它们都能促进黑色素瘤(鲍斯)细胞释放 t-PA。在大鼠体内,FK-5、N-硬脂酰-D-Ser-L-Pro-OH(FK-8)和 N-硬脂酰-D-Ser-L-Pro-OEt(FK-10)可将纤溶活性提高两倍。FK-5 和 FK-8 也具有很强的溶血活性,但 FK-10 并不诱导溶血。因此,我们在兔子身上对 FK-10 进行了研究。注射这种化合物后,优球蛋白部分的纤维蛋白溶解活性明显增强,但不伴有溶血。因此,FK-10 在体外和体内都能有效增强纤溶活性。