一种新的环丙沙星-铁载体Trojan Horse抗菌剂是通过结合salmochelin的主要设计特征而制成的,salmochelin是一种隐身的铁载体,可通过其糖基化的邻苯二酚单元逃避哺乳动物铁丹参的捕获。对缀合物的抗微生物活性的评估表明,与铁环氧氟沙星相比,在铁充足和贫乏的条件下,沙门菌素模拟物的附着导致对两种大肠杆菌K12和Nissle 1917菌株的效力降低。该观察结果可以归因于降低的DNA促旋酶抑制作用(如体外DNA促旋酶测定法所证实)和细菌吸收降低的综合作用。使用仿铁67 Ga 3+进行放射标记监测摄取,这表明大肠杆菌K12中的细胞摄取受到限制。相反,先前报道的基于葡萄铁蛋白的缀合物在类似的67 Ga 3+标记研究中显示出可测量的摄取。这些结果表明,在特洛伊木马抗菌剂的设计中,铁载体的选择以及接头的性质和长度仍然是一个重大挑战。
Mimicking salmochelin S1 and the interactions of its Fe(III) complex with periplasmic iron siderophore binding proteins CeuE and VctP
作者:Ellis J. Wilde、Elena V. Blagova、Thomas J. Sanderson、Daniel J. Raines、Ross P. Thomas、Anne Routledge、Anne-Kathrin Duhme-Klair、Keith S. Wilson
DOI:10.1016/j.jinorgbio.2018.10.008
日期:2019.1
A mimic of the tetradentate stealth siderophore salmochelin S1, was synthesised, characterised and shown to form Fe(III) complexes with ligand-to-metal ratios of 1:1 and 3:2. Circular dichroism spectroscopy confirmed that the periplasmicbindingproteins CeuE and VctP of Campylobacter jejuni and Vibrio cholerae, respectively, bind the Fe(III) complex of the salmochelin mimic by preferentially selecting
Diastereoselective Ni-Catalyzed Negishi Cross-Coupling Approach to Saturated, Fully Oxygenated <i>C</i>-Alkyl and <i>C</i>-Aryl Glycosides
作者:Hegui Gong、Michel R. Gagné
DOI:10.1021/ja8041564
日期:2008.9.10
A Ni-catalyzedNegishicross-couplingapproach to C-glycosides is described with an emphasis on C-arylglycosides. The combination of NiCl2/PyBox in N,N'-dimethylimidazolidinone (DMI) enabled the synthesis of C-alkylglycosides under mild reaction conditions. Moderate yields and beta-selectivities were obtained for C-glucosides, and good yields and high alpha-selectivities were the norm for C-mannosides
Facile synthesis of salmochelin S1, S2, MGE, DGE, and TGE
作者:Xiaolong Yu、Yijing Dai、Tao Yang、Michel R. Gagné、Hegui Gong
DOI:10.1016/j.tet.2010.11.007
日期:2011.1
Salmochelin S1, S2, MGE, DGE, and TGE were prepared through amide bond connection of an aryl C-glucosyl acyl chloride ((ArCOCl)-C-1) and serine ester amines, followed by hydrogenolysis of the per-benzylated precursors. Each synthesis employed a highly diastereoselective Ni-catalyzed Negishi approach to the aryl C-glycoside subunit. (C) 2010 Elsevier Ltd. All rights reserved.
A novel radiolabelled salmochelin derivative for bacteria-specific PET imaging: synthesis, radiolabelling and evaluation
A 68Ga-labelled salmochelin-related PET-radiotracer was developed based on a Trojan horse strategy by targeting the siderophore mediated iron-transport for specific imaging of bacterial infection.
A Salmochelin S4-Inspired Ciprofloxacin Trojan Horse Conjugate
作者:Thomas J. Sanderson、Conor M. Black、James W. Southwell、Ellis J. Wilde、Apurva Pandey、Reyme Herman、Gavin H. Thomas、Eszter Boros、Anne-Kathrin Duhme-Klair、Anne Routledge
DOI:10.1021/acsinfecdis.0c00568
日期:2020.9.11
reduced DNA gyrase inhibition, as confirmed by in vitro DNA gyrase assays, and reduced bacterialuptake. Uptake was monitored using radiolabeling with iron-mimetic 67Ga3+, which revealed limited cellular uptake in E. coli K12. In contrast, previously reported staphyloferrin-based conjugates displayed a measurable uptake in analogous 67Ga3+ labeling studies. These results suggest that, in the design of
一种新的环丙沙星-铁载体Trojan Horse抗菌剂是通过结合salmochelin的主要设计特征而制成的,salmochelin是一种隐身的铁载体,可通过其糖基化的邻苯二酚单元逃避哺乳动物铁丹参的捕获。对缀合物的抗微生物活性的评估表明,与铁环氧氟沙星相比,在铁充足和贫乏的条件下,沙门菌素模拟物的附着导致对两种大肠杆菌K12和Nissle 1917菌株的效力降低。该观察结果可以归因于降低的DNA促旋酶抑制作用(如体外DNA促旋酶测定法所证实)和细菌吸收降低的综合作用。使用仿铁67 Ga 3+进行放射标记监测摄取,这表明大肠杆菌K12中的细胞摄取受到限制。相反,先前报道的基于葡萄铁蛋白的缀合物在类似的67 Ga 3+标记研究中显示出可测量的摄取。这些结果表明,在特洛伊木马抗菌剂的设计中,铁载体的选择以及接头的性质和长度仍然是一个重大挑战。