金黄色葡萄球菌是医院和社区获得性感染的最常见原因之一,耐药菌株每年导致数万人死亡。金黄色葡萄球菌分选酶 A 抑制剂旨在干扰毒力决定因素。我们已经确定二硫烷基苯甲酰胺是一类新型有效的分选酶 A 抑制剂,通过活性位点半胱氨酸的共价修饰发挥作用。合成了一系列广泛的衍生物来推导构效关系(SAR)。体外和计算机方法使实验观察到的结合亲和力和选择性合理化。研究发现,最活跃的化合物具有个位数的微摩尔 Ki 值,在 10 μM 的有效抑制剂浓度下,金黄色葡萄球菌纤维蛋白原附着量减少高达 66%。这种新分子类别表现出最小的细胞毒性、较低的细菌生长抑制和分选酶介导的金黄色葡萄球菌细胞粘附受损。
金黄色葡萄球菌是医院和社区获得性感染的最常见原因之一,耐药菌株每年导致数万人死亡。金黄色葡萄球菌分选酶 A 抑制剂旨在干扰毒力决定因素。我们已经确定二硫烷基苯甲酰胺是一类新型有效的分选酶 A 抑制剂,通过活性位点半胱氨酸的共价修饰发挥作用。合成了一系列广泛的衍生物来推导构效关系(SAR)。体外和计算机方法使实验观察到的结合亲和力和选择性合理化。研究发现,最活跃的化合物具有个位数的微摩尔 Ki 值,在 10 μM 的有效抑制剂浓度下,金黄色葡萄球菌纤维蛋白原附着量减少高达 66%。这种新分子类别表现出最小的细胞毒性、较低的细菌生长抑制和分选酶介导的金黄色葡萄球菌细胞粘附受损。
Further Studies on the Dmt-Tic Pharmacophore: Hydrophobic Substituents at the C-Terminus Endow δ Antagonists To Manifest μ Agonism or μ Antagonism
作者:Severo Salvadori、Remo Guerrini、Gianfranco Balboni、Clementina Bianchi、Sharon D. Bryant、Peter S. Cooper、Lawrence H. Lazarus
DOI:10.1021/jm990165m
日期:1999.12.2
Twenty N- and/or C-modified Dmt-Tic analogues yielded similar K-i values with either [H-3]DPDPE (delta(1) agonist) or [H-3]N,N(Me)(2)-Dmt-Tic-OH (delta antagonist). N-Methylation enhanced delta antagonism while N-piperidine-1-yl, N-pyrrolidine-1-yl, and N-pyrrole-1-yl were detrimental. Dmt-Tic-X (X = -NHNH2, -NHCH3, -NH-1-adamantyl, -NH-tBu, -NH-5-tetrazolyl) had high delta affinities (K-i = 0.16 to 1 nM) with variable mu affinities to yield nonselective or weakly mu-selective analogues, N,N-(Me)(2)Dmt-Tic-NH-1-adamantane exhibited dual delta and mu receptor affinities (K(i)delta = 0.16 nM and K(i)mu =1.12 nM) and potent delta antagonism (pA(2) = 9.06) with mu agonism (IC50 = 16 nM). H-Dmt-beta HTic-OH (methylene bridge between C-alpha of Tic and carboxylate function) yielded a biostable peptide with high delta affinity (K-i = 0.85 nM) and delta antagonism (pA(2) = 8.85) without mu bioactivity, Dmt-Tic-Ala-X (X = -NHCH3, -OCH3, -NH-1-adamantyl, -NHtBu) exhibited high delta affinities (K-i = 0.06 to 0.2 nM) and elevated mu affinities (K-i = 2.5 to 11 nM), but only -Dmt-Tic-Ala-NH-1-adamantane and H-Dmt-Tic-Ala-NHtBu yielded delta receptor antagonism (pA(2) = 9.29 and 9.16, respectively). Thus, Dmt-Tic with hydrophobic C-terminal substituents enhanced mu affinity to provide delta antagonists with dual receptor affinities and bifunctional activity.
Asymmetric Disulfanylbenzamides as Irreversible and Selective Inhibitors of<i>Staphylococcus aureus</i>Sortase A
community-acquired infections, with drug-resistant strains being responsible for tens of thousands of deaths per year. S. aureus sortase A inhibitors are designed to interfere with virulence determinants. We have identified disulfanylbenzamides as a new class of potent inhibitors against sortase A that act by covalent modification of the active-site cysteine. A broad series of derivatives were synthesized to
金黄色葡萄球菌是医院和社区获得性感染的最常见原因之一,耐药菌株每年导致数万人死亡。金黄色葡萄球菌分选酶 A 抑制剂旨在干扰毒力决定因素。我们已经确定二硫烷基苯甲酰胺是一类新型有效的分选酶 A 抑制剂,通过活性位点半胱氨酸的共价修饰发挥作用。合成了一系列广泛的衍生物来推导构效关系(SAR)。体外和计算机方法使实验观察到的结合亲和力和选择性合理化。研究发现,最活跃的化合物具有个位数的微摩尔 Ki 值,在 10 μM 的有效抑制剂浓度下,金黄色葡萄球菌纤维蛋白原附着量减少高达 66%。这种新分子类别表现出最小的细胞毒性、较低的细菌生长抑制和分选酶介导的金黄色葡萄球菌细胞粘附受损。