Synthesis and Biological Activity of a Series of Potent Fluoromethyl Ketone Inhibitors of Recombinant Human Calpain I
作者:Sankar Chatterjee、Mark A. Ator、Donna Bozyczko-Coyne、Kurt Josef、Gregory Wells、Rabindranath Tripathy、Mohamed Iqbal、Ron Bihovsky、Shobha E. Senadhi、Satish Mallya、Teresa M. O'Kane、Beth Ann McKenna、Robert Siman、John P. Mallamo
DOI:10.1021/jm970197e
日期:1997.11.1
Calpain I, an intracellular cysteine protease, has been implicated in the neurodegeneration following an episode of stroke. In this paper, we report on a series of potent dipeptide fluoromethyl ketone inhibitors of recombinant human calpain I (rh calpain I). SAR studies revealed that while calpain I tolerates a variety of hydrophobic groups at the P1 site, Leu at P2 is preferred. However, the nature
钙蛋白酶I,一种细胞内半胱氨酸蛋白酶,与中风发作后的神经变性有关。在本文中,我们报告了一系列有效的重组人钙蛋白酶I(rh calpain I)的二肽氟甲基酮抑制剂。SAR研究表明,尽管钙蛋白酶I可以耐受P1位点的各种疏水基团,但P2位的Leu是优选的。然而,N-末端封端基团的性质对这一系列化合物的抑制活性具有显著作用。最有效的是化合物4e [(1,2,3,4-四氢异喹啉-2-基)羰基-Leu-D,L-Phe-CH2F + ++]钙蛋白酶I的二肽氟甲基酮抑制剂(失活的二级速率常数为276,000 M-1 s-1)尚未见报道;三肽4k(Cbz-Leu-Leu-D,L-Phe-CH2F)等价。这项研究中提出的许多化合物对钙蛋白酶I的选择性优于组织蛋白酶B和L(两种相关的半胱氨酸蛋白酶)。在测定中针对分离的rh钙蛋白酶I表现出良好抑制活性的化合物也抑制人细胞系中的细胞内钙蛋白酶I。因此,在完整细胞