Synthesis and Biological Activity of a Novel Class of Small Molecular Weight Peptidomimetic Competitive Inhibitors of Protein Tyrosine Phosphatase 1B
作者:Scott D. Larsen、Tjeerd Barf、Charlotta Liljebris、Paul D. May、Derek Ogg、Theresa J. O'Sullivan、Barbara J. Palazuk、Heinrich J. Schostarez、F. Craig Stevens、John E. Bleasdale
DOI:10.1021/jm010393s
日期:2002.1.1
sulfate with other potential phosphate mimics. The most potent analogue arising from this effort was triacid 71, which inhibits PTP1B competitively with a K(i) = 0.22 microM without inhibiting SHP-2 or LAR at concentrations up to 100 microM. Overall, the inhibitors generated in this work showed little or no enhancement of insulin signaling in cellular assays. However, potential prodrug triester 70 did induce
蛋白质酪氨酸磷酸酶1B(PTP1B)部分地通过使胰岛素受体(IR)的β亚基调节域内的关键酪氨酸残基去磷酸化,从而负调节胰岛素信号传导,从而减弱受体酪氨酸激酶的活性。因此,抑制PTP1B有望改善胰岛素抵抗,并且最近已成为旨在鉴定用于治疗II型糖尿病的新药物的发现工作的重点。我们以前曾报道三肽Ac-Asp-Tyr(SO(3)H)-Nle-NH(2)是PTP1B的令人惊讶的有效抑制剂(K(i)= 5 microM)。为了改善该引线的稳定性和效力以及减弱其肽特性,进行了模拟程序。该程序初始阶段的具体内容包括用非氨基酸成分替换N和C末端,修饰酪氨酸亚基以及用其他潜在的磷酸盐模拟物替换硫酸酪氨酸。从这种努力中产生的最有效的类似物是三酸71,它以K(i)= 0.22 microM竞争性抑制PTP1B,而在浓度高达100 microM的情况下却不抑制SHP-2或LAR。总体而言,这项工作中产生的抑制剂在细