Alkyl-guanidine Compounds as Potent Broad-Spectrum Antibacterial Agents: Chemical Library Extension and Biological Characterization
摘要:
Nowadays, the increasing of multidrug-resistant pathogenic bacteria represents a serious threat to public health, and the lack of new antibiotics is becoming a global emergency. Therefore, research in antibacterial fields is urgently needed to expand the currently available arsenal of drugs. We have recently reported an alkyl-guanidine derivative (2), characterized by a symmetrical dimeric structure, as a good candidate for further developments, with a high antibacterial activity against both Gram-positive and Gram-negative strains. In this study, starting from its chemical scaffold, we synthesized a small library of analogues. Moreover, biological and in vitro pharmacokinetic characterizations were conducted on some selected derivatives, revealing notable properties: broad-spectrum profile, activity against resistant clinical isolates, and appreciable aqueous solubility. Interestingly, 2 seems neither to select for resistant strains nor to macroscopically alter the membranes, but further studies are required to determine the mode of action.
Bifunctional supramolecular prodrug vesicles constructed from a camptothecin derivative with a water-soluble pillar[5]arene for cancer diagnosis and therapy
作者:Guangping Sun、Zhimei He、Min Hao、Zuqiang Xu、Xiao-Yu Hu、Jun-Jie Zhu、Leyong Wang
DOI:10.1039/c9cc05859a
日期:——
Bifunctional supramolecular prodrug vesicles have been successfully constructed based on the complexation between a glutathione (GSH)-responsive prodrug guest molecule (DNS-CPT) and a water-soluble pillar[5]arene (WP5) for cancer diagnosis and therapy. Under the microenvironment of cancer cells with high GSH concentration, 7-ethyl-10-hydroxycamptothecin (SN-38) with strong yellow fluorescence can be
The catalytic decarboxylative nitrogenation of aliphaticcarboxylicacids for the synthesis of alkyl azides is reported. A series of tertiary, secondary, and primary organoazides were prepared from easily available aliphaticcarboxylicacids by using K2S2O8 as the oxidant and PhSO2N3 as the nitrogen source. The EPR experiment sufficiently proved that an alkyl radical process was generated in the process
报道了用于烷基叠氮化物合成的脂肪族羧酸的催化脱羧氮化。通过使用K 2 S 2 O 8作为氧化剂和PhSO 2 N 3作为氮源,由易于获得的脂肪族羧酸制备出一系列的叔,仲和伯有机叠氮化物。EPR实验充分证明在该过程中产生了烷基自由基过程,DFT计算进一步支持SET过程,然后逐步进行S H 2反应以提供叠氮化物产物。
Incorporation of a calixarene-based glucose functionalised bolaamphiphile into lipid bilayers for multivalent lectin recognition
glucosylated bolaamphiphile built on a calix[4]arene scaffold are described. The new glucocalixarene bolaamphiphile destabilizes bilayers of saturated lipids whereas it rigidifies those of unsaturated lipids, thus reducing leakage of calcein from the liposome internal aqueous compartment. Moreover, from fluorescence and turbidimetry experiments it was found that the glucose units of bolaamphiphile 1 functionalised
申请人:Centre National de la Recherche Scientifique (CNRS)
公开号:US10908153B2
公开(公告)日:2021-02-02
The invention relates to a method of identifying molecules which inhibit the virulence machinery of Pseudomonas aeruginosa, to a device for identifying a molecule which inhibits the virulence machinery of Pseudomonas aeruginosa, to novel compounds which inhibit the virulence machinery of Pseudomonas aeruginosa, to compounds for use for preventing and/or treating a pathogenic infection caused by Pseudomonas aeruginosa and also to pharmaceutical compositions for preventing and/or treating a pathogenic infection caused by Pseudomonas aeruginosa.