Comparative Study of the Inhibition of Metallo-.BETA.-Lactamases (IMP-1 and VIM-2) by Thiol Compounds That Contain a Hydrophobic Group
作者:Wanchun Jin、Yoshichika Arakawa、Hisami Yasuzawa、Tomoko Taki、Ryo Hashiguchi、Kana Mitsutani、Asumi Shoga、Yoshihiro Yamaguchi、Hiromasa Kurosaki、Naohiro Shibata、Michio Ohta、Masafumi Goto
DOI:10.1248/bpb.27.851
日期:——
For the purpose of screening of inhibitors that are effective for wide range of metallo-β-lactamases, the inhibitory effect of two series of compounds, 2-ω-phenylalkyl-3-mercaptopropionic acid (PhenylCnSH (n=1—4)) and N-[(7-chloro-quinolin-4-ylamino)-alkyl]-3-mercapto-propionamide (QuinolineCnSH (n=2—6)), where n denotes the alkyl chain length, on metallo-β-lactamases IMP-1 and VIM-2 was examined. These inhibitors contain a thiol group and a hydrophobic group linked by variable-length methylene chain. PhenylCnSH (n=1—4) was found to be a potent inhibitor of both IMP-1 and VIM-2. PhenylC4SH was the potent inhibitor of both IMP-1 (IC50=1.2 μM) and VIM-2 (IC50=1.1 μM) among this study. When the number of methylene units was varied, QuinolineC4SH showed the maximum inhibitory activity against IMP-1 and VIM-2 (IC50=2.5 μM and IC50=2.4 μM). The relationship between the inhibitory effect of the alkyl chain length was different for both series of inhibitors, suggesting that IMP-1 has a tighter binding site than VIM-2. QuinolineCnSH did not serve as a fluorescence reagent for metallo-β-lactamases.
为了筛选对多种金属-β-内酰胺酶有效的抑制剂,我们对两个系列的化合物进行了抑制作用的研究、2-ω-phenylalkyl-3-mercaptopropionic acid(PhenylCnSH(n=1-4))和 N-[(7-chloro-quinolin-4-ylamino)-alkyl]-3-mercapto-propionamide(QuinolineCnSH(n=2-6))(其中 n 表示烷基链长度)这两个系列的化合物对金属-β-内酰胺酶 IMP-1 和 VIM-2 的抑制作用进行了研究。这些抑制剂含有一个硫醇基团和一个疏水基团,由不同长度的亚甲基链连接。研究发现,苯基 CnSH(n=1-4)是 IMP-1 和 VIM-2 的强效抑制剂。在这项研究中,PhenylC4SH 是 IMP-1 (IC50=1.2 μM)和 VIM-2 (IC50=1.1 μM)的强效抑制剂。当亚甲基单位数目不同时,喹啉-C4SH 对 IMP-1 和 VIM-2 的抑制活性最大(IC50=2.5 μM和 IC50=2.4 μM)。两个系列的抑制剂的抑制作用与烷基链长度的关系不同,这表明 IMP-1 的结合位点比 VIM-2 更紧密。喹啉-CnSH不能作为金属-β-内酰胺酶的荧光试剂。