Potent and broad-spectrum antibacterial activity of indole-based bisamidine antibiotics: Synthesis and SAR of novel analogs of MBX 1066 and MBX 1090
摘要:
The prevalence of drug-resistant bacteria in the clinic has propelled a concerted effort to find new classes of antibiotics that will circumvent current modes of resistance. We have previously described a set of bisamidine antibiotics that contains a core composed of two indoles and a central linker. The first compounds of the series, MBX 1066 and MBX 1090, have potent antibacterial properties against a wide range of Gram-positive and Gram-negative bacteria. We have conducted a systematic exploration of the amidine functionalities, the central linker, and substituents at the indole 3-position to determine the factors involved in potent antibacterial activity. Some of the newly synthesized compounds have even more potent and broad-spectrum activity than MBX 1066 and MBX 1090. (C) 2013 Elsevier Ltd. All rights reserved.
Antibacterial Drug Leads: DNA and Enzyme Multitargeting
摘要:
We report the results of an investigation of the activity of a series of amidine and bisamidine compounds against Staphylococcus aureus and Escherichia coli. The most active compounds bound to an AT-rich DNA dodecamer (CGCGAATTCGCG)(2) and using DSC were found to increase the melting transition by up to 24 degrees C. Several compounds also inhibited undecaprenyl diphosphate synthase (UPPS) with IC50 values of 100-500 nM, and we found good correlations (R-2 = 0.89, S. aureus; R-2 = 0.79, E. coli) between experimental and predicted cell growth inhibition by using DNA Delta(Tm) and UPPS IC50 experimental results together with one computed descriptor. We also solved the structures of three bisamidines binding to DNA as well as three UPPS structures. Overall, the results are of general interest in the context of the development of resistance-resistant antibiotics that involve multitargeting.
The invention provides fungicide and/or antifungal organic compounds and compositions thereof that kill or inhibit growth of cells of one or more microbial pathogens.
Antibacterial Drug Leads: DNA and Enzyme Multitargeting
We report the results of an investigation of the activity of a series of amidine and bisamidine compounds against Staphylococcus aureus and Escherichia coli. The most active compounds bound to an AT-rich DNA dodecamer (CGCGAATTCGCG)(2) and using DSC were found to increase the melting transition by up to 24 degrees C. Several compounds also inhibited undecaprenyl diphosphate synthase (UPPS) with IC50 values of 100-500 nM, and we found good correlations (R-2 = 0.89, S. aureus; R-2 = 0.79, E. coli) between experimental and predicted cell growth inhibition by using DNA Delta(Tm) and UPPS IC50 experimental results together with one computed descriptor. We also solved the structures of three bisamidines binding to DNA as well as three UPPS structures. Overall, the results are of general interest in the context of the development of resistance-resistant antibiotics that involve multitargeting.
Potent and broad-spectrum antibacterial activity of indole-based bisamidine antibiotics: Synthesis and SAR of novel analogs of MBX 1066 and MBX 1090
作者:John D. Williams、Son T. Nguyen、Shen Gu、Xiaoyuan Ding、Michelle M. Butler、Tommy F. Tashjian、Timothy J. Opperman、Rekha G. Panchal、Sina Bavari、Norton P. Peet、Donald T. Moir、Terry L. Bowlin
DOI:10.1016/j.bmc.2013.10.014
日期:2013.12
The prevalence of drug-resistant bacteria in the clinic has propelled a concerted effort to find new classes of antibiotics that will circumvent current modes of resistance. We have previously described a set of bisamidine antibiotics that contains a core composed of two indoles and a central linker. The first compounds of the series, MBX 1066 and MBX 1090, have potent antibacterial properties against a wide range of Gram-positive and Gram-negative bacteria. We have conducted a systematic exploration of the amidine functionalities, the central linker, and substituents at the indole 3-position to determine the factors involved in potent antibacterial activity. Some of the newly synthesized compounds have even more potent and broad-spectrum activity than MBX 1066 and MBX 1090. (C) 2013 Elsevier Ltd. All rights reserved.