Design and Synthesis of Sulfur Based Inhibitors of Matrix Metalloproteinase-1.
作者:Tetsunori Fujisawa、Shinjiro Odake、Yuji Ogawa、Junko Yasuda、Yasuo Morita、Tadanori Morikawa
DOI:10.1248/cpb.50.239
日期:——
Fibroblast collagenase (MMP-1), a member of the matrix metalloproteinases family, is believed to be a pathogenesis of arthritis, by cleaving triple-helical type II collagen in cartilage. From the similarity of the active site zinc binding mode with hydroxamate, we designed and synthesized α-mercaptocarbonyl possessing compounds (3—5), which incorporated various peptide sequences as enzyme recognition sites. The P4–P1 peptide incorporating compound (3) exhibited as potent inhibition as the hydroxamate (1) and the carboxylate (2) type inhibitors, with an IC50 of 10−6 M order against MMP-1. But the inhibitor (3) related compounds (6—8) displayed decreased or no inhibitory potencies. These results suggest that the existence of both the carbonyl and thiol groups might be critical for the inhibition, and the distance between the two functional groups is important for inhibitory potency. For Pn′ peptide incorporating compounds (4a—k), except for 4h and 4k, all compounds showed IC50 values under sub-nanomolar. Among them, for potent inhibition, Leu was better than Phe and Val as the P1′ amino acid, and the P2′ position amino acid was necessary, and preferentially Phe. Insertion of the Pn peptide into 4d or 4k, giving compounds 5a—c, did not increase the activities of 4d and 4k. Substitution of the mercapto group with other functional groups lost the activity of compound 4a. The stereochemical preference at the thiol-attached position was also determined by preparation of both isomers of 4a. It was found that the S configuration compound (36b) is approximately 100 times more potent than the corresponding R-isomer (36a).
成纤维细胞胶原酶(MMP-1)是基质金属蛋白酶家族的一员,被认为是关节炎的病理机制之一,它通过切割软骨中的三重螺旋II型胶原蛋白发挥作用。基于其活性位点锌结合模式与羟肟酸的相似性,我们设计并合成了含有α-巯基羰基的化合物(3—5),这些化合物包含了作为酶识别位点的不同肽序列。包含P4–P1肽的化合物(3)表现出与羟肟酸(1)和羧酸(2)类型抑制剂相当的强抑制作用,对MMP-1的IC50值为10−6小于M的量级。然而,与抑制剂(3)相关的化合物(6—8)显示出下降或无抑制活性。这些结果表明,羰基和巯基的共存可能对抑制作用至关重要,并且这两个官能团之间的距离对抑制效能也很重要。对于Pn'肽的包含化合物(4a—k),除了4h和4k以外,所有化合物的IC50值均低于亚纳摩尔。其中,在强抑制作用方面,Leu作为P1'氨基酸优于Phe和Val,而P2'位的氨基酸是必要的,并且优先选择Phe。将Pn肽插入4d或4k生成化合物5a—c,并未增加4d和4k的活性。将巯基替换为其他官能团则失去了化合物4a的活性。通过合成4a的两种异构体还确定了在巯基连接位置的立体化学偏好,发现S构型的化合物(36b)的效能约为相应R-异构体(36a)的100倍。