虽然大多数临床使用的抗生素来自天然产物,但新的广谱天然产物的分离变得越来越罕见,而且由于其支架或靶标的内在限制,通常认为窄谱药物不适合开发。然而,天然产物抗生素的谱可能会受到某些细菌特定耐药机制的限制,例如靶点突变,并且这种“潜在”抗生素的谱可能会通过衍生化重新优化,就像之前所做的那样临床部署的抗生素。我们最近展示了 arylomycin 天然产物抗生素的谱系,它们通过抑制 I 型信号肽酶的新机制起作用,比以前认为的更广泛,并且几种关键人类病原体的耐药性是由于目标肽酶中存在特定的 Pro 残基,该残基破坏了与抗生素脂肽尾部的相互作用。为了开始测试这种天然抗性是否可以通过衍生化来克服,我们合成了脂肽尾部改变的类似物,并确定了几种具有增加的抗金黄色葡萄球菌。数据支持了芳霉素是潜在抗生素的假设,表明它们的谱可以通过衍生化进行优化,并确定了未来优化工作可能会关注的有前途的支架。
Arylomycin analogs are provided, wherein the analogs can have broad spectrum bioactivity. Resistance to the antibiotic bioactivity of natural product arylomycin in a range of pathogenic bacterial species has been found to depend upon single amino acid mutations at defined positions of bacterial Signal Peptidases (SPases), wherein the presence of a proline residue confers arylomycin resistance. Arylomycin analogs are provided herein that can overcome that resistance and provide for a broader spectrum of antibiotic bioactivity than can natural product arylomycins such as arylomycin A2. Methods for determining if a bacterial strain is susceptible to narrow spectrum arylomycin antibiotics, or if a broad spectrum analog is required for treatment, is provided. Pharmaceutical compositions and methods of treatment of bacterial infections, and methods of synthesis of arylomycin analogs, are provided.
US9187524B2
申请人:——
公开号:US9187524B2
公开(公告)日:2015-11-17
Initial Efforts toward the Optimization of Arylomycins for Antibiotic Activity
作者:Tucker C. Roberts、Mark A. Schallenberger、Jian Liu、Peter A. Smith、Floyd E. Romesberg
DOI:10.1021/jm1016126
日期:2011.7.28
the arylomycin natural product antibiotics, which act via the novel mechanism of inhibiting type Isignalpeptidase, is broader than previously believed and that resistance in several key human pathogens is due to the presence of a specific Pro residue in the target peptidase that disrupts interactions with the lipopeptide tail of the antibiotic. To begin to test whether this natural resistance might
虽然大多数临床使用的抗生素来自天然产物,但新的广谱天然产物的分离变得越来越罕见,而且由于其支架或靶标的内在限制,通常认为窄谱药物不适合开发。然而,天然产物抗生素的谱可能会受到某些细菌特定耐药机制的限制,例如靶点突变,并且这种“潜在”抗生素的谱可能会通过衍生化重新优化,就像之前所做的那样临床部署的抗生素。我们最近展示了 arylomycin 天然产物抗生素的谱系,它们通过抑制 I 型信号肽酶的新机制起作用,比以前认为的更广泛,并且几种关键人类病原体的耐药性是由于目标肽酶中存在特定的 Pro 残基,该残基破坏了与抗生素脂肽尾部的相互作用。为了开始测试这种天然抗性是否可以通过衍生化来克服,我们合成了脂肽尾部改变的类似物,并确定了几种具有增加的抗金黄色葡萄球菌。数据支持了芳霉素是潜在抗生素的假设,表明它们的谱可以通过衍生化进行优化,并确定了未来优化工作可能会关注的有前途的支架。