酰基肽水解酶是一种丝氨酸蛋白酶,它与脯氨酰寡肽酶、二肽基肽酶 IV 和寡肽酶 B 一起属于脯氨酰寡肽酶家族。其主要功能与从蛋白质和肽中去除 N-乙酰化氨基酸残基有关。尽管 N-酰化发生在 50-90% 的真核蛋白质中,但这种修饰的确切功能仍不清楚。最近的研究结果表明,酰基肽水解酶参与各种事件,包括氧化蛋白降解、淀粉样蛋白 β-肽裂解和对 DNA 损伤的反应。考虑到酰基肽水解酶和蛋白酶体之间的蛋白质降解循环串扰,第一种酶的抑制导致泛素-蛋白酶体系统的下调和癌细胞凋亡的诱导。酰基肽水解酶已被提议作为开发新的潜在抗癌剂的有趣目标。在这里,我们介绍了(1-氨基乙基)膦酸二芳基酯的简单衍生物的合成,即在 N 端和酯环上多样化的丙氨酸的膦酸类似物,作为酰基肽水解酶的抑制剂,并讨论了标题化合物诱导细胞凋亡的能力U937 和 MV-4-11 肿瘤细胞系。
Human Neutrophil Elastase Phosphonic Inhibitors with Improved Potency of Action
摘要:
Herein, we present the synthesis and the measurement of the inhibitory activity of novel peptidyl derivatives of alpha-aminoalkylphosphonate diaryl esters as human neutrophil elastase inhibitors. Their selectivity against other serine proteases, including porcine pancreatic elastase, chymotrypsin, and trypsin, was also demonstrated. We also describe the preparation of single peptide diastereomers. The most active and selective compound developed possessed a k(inact)/K-1 of 2353000 M-1 s(-1), which is the most potent irreversible peptidyl inhibitor of human neutrophil elastase reported to date. The peptidyl inhibitors were demonstrated to be stable in PBS buffer and human plasma, as were their complexes with HNE.