Membrane Active Small Molecules Show Selective Broad Spectrum Antibacterial Activity with No Detectable Resistance and Eradicate Biofilms
摘要:
Treating bacterial biofilms With conventional antibiotics is limited due to ineffectiveness of the drugs and higher propensity to develop bacterial resistance. Development of new classes of antibacterial therapeutics with alternative mechanisms of action has become imperative. Herein, we report the design, synthesis, and biological evaluations of novel membrane,active small molecules featuring two positive charges, four nonpeptidic,amide groups, and variable hydro, phobic/hydrophilic (amphiphilic) character. The biocides synthesized via a facile methodology not only displayed good antibacterial activity against wild-type bacteria but also showed high activity against various drug-resistant bacteria such as methicillin-resistant Staphylococcus aureus (MRSA), vancomycin-resistant Enterococcus faecium (VRE), and beta-lactam-resistant Klebsiella pneumoniae. Further, these biocides not only inhibited the formation of biofilms but also disrupted the established S. aureus and E. coli biofilms. The membrane-active biocides hindered the propensity to develop bacterial resistance. Moreover; the biocides showed negligible toxicity against mammalian cells and thus bear potential to be used as therapeutic agents.
[EN] OXYTOCIN DERIVATIVES WITH IMPROVED PROPERTIES<br/>[FR] DÉRIVÉS D'OCYTOCINE AYANT DES PROPRIÉTÉS AMÉLIORÉES
申请人:SCRIPPS RESEARCH INST
公开号:WO2021126990A1
公开(公告)日:2021-06-24
The present invention provides novel oxytocin derivative compounds that contain a fatty acid moiety that is conjugated to a modified oxytocin scaffold. The oxytocin derivative compounds of the invention are potent oxytocin agonists with substantially improved stability. Also provided in the invention are therapeutic methods of using the compounds in the treatment of various diseases, e.g., metabolic disorders such as obesity.
Synthetic, structural mimetics of the β-hairpin flap of HIV-1 protease inhibit enzyme function
作者:Jay Chauhan、Shen-En Chen、Katherine J. Fenstermacher、Aurash Naser-Tavakolian、Tali Reingewertz、Rosene Salmo、Christian Lee、Emori Williams、Mithun Raje、Eric Sundberg、Jeffrey J. DeStefano、Ernesto Freire、Steven Fletcher
DOI:10.1016/j.bmc.2015.09.002
日期:2015.11
Small-molecule mimetics of the beta-hairpin flap of HIV-1 protease (HIV-1 PR) were designed based on a 1,4-benzodiazepine scaffold as a strategy to interfere with the flap-flap protein-protein interaction, which functions as a gated mechanism to control access to the active site. Michaelis-Menten kinetics suggested our small-molecules are competitive inhibitors, which indicates the mode of inhibition is through binding the active site or sterically blocking access to the active site and preventing flap closure, as designed. More generally, a new bioactive scaffold for HIV-1PR inhibition has been discovered, with the most potent compound inhibiting the protease with a modest K-i of 11 mu M. (C) 2015 Elsevier Ltd. All rights reserved.