Identification of a potent small-molecule inhibitor of bacterial DNA repair that potentiates quinolone antibiotic activity in methicillin-resistant Staphylococcus aureus
摘要:
The global emergence of antibiotic resistance is one of the most serious challenges facing modern medicine. There is an urgent need for validation of new drug targets and the development of small molecules with novel mechanisms of action. We therefore sought to inhibit bacterial DNA repair mediated by the AddAB/RecBCD protein complexes as a means to sensitize bacteria to DNA damage caused by the host immune system or quinolone antibiotics. A rational, hypothesis-driven compound optimization identified IMP-1700 as a cell-active, nanomolar potency compound. IMP-1700 sensitized multidrug-resistant Staphylococcus aureus to the fluoroquinolone antibiotic ciprofloxacin, where resistance results from a point mutation in the fluoroquinolone target, DNA gyrase. Cellular reporter assays indicated IMP-1700 inhibited the bacterial SOS-response to DNA damage, and compoundfunctionalized Sepharose successfully pulled-down the AddAB repair complex. This work provides validation of bacterial DNA repair as a novel therapeutic target and delivers IMP-1700 as a tool molecule and starting point for therapeutic development to address the pressing challenge of antibiotic resistance.
ANTIBIOTIC COMPOUNDS AND COMPOSITIONS, AND METHODS FOR IDENTIFICATION THEREOF
申请人:Fred Hutchinson Cancer Research Center
公开号:US20150126519A1
公开(公告)日:2015-05-07
Disclosed herein are compounds and methods for inhibiting bacterial DNA repair enzymes, including AddAB and RecBCD helicase-nucleases. Pharmaceutical compositions and methods for treating a subject with an antibacterial agent are also disclosed herein.
[EN] ANTIBIOTIC COMPOUNDS AND COMPOSITIONS, AND METHODS FOR IDENTIFICATION THEREOF<br/>[FR] COMPOSÉS ET COMPOSITIONS ANTIBIOTIQUES, ET PROCÉDÉS D'IDENTIFICATION ASSOCIÉS
申请人:HUTCHINSON FRED CANCER RES
公开号:WO2013142628A2
公开(公告)日:2013-09-26
Disclosed herein are compounds and methods for inhibiting bacterial DNA repair enzymes, including AddAB and RecBCD helicase-nucleases. Pharmaceutical compositions and methods for treating a subject with an antibacterial agent are also disclosed herein.
Identification of a potent small-molecule inhibitor of bacterial DNA repair that potentiates quinolone antibiotic activity in methicillin-resistant Staphylococcus aureus
作者:Carine S.Q. Lim、Kam Pou Ha、Rebecca S. Clarke、Leigh-Anne Gavin、Declan T. Cook、Jennie A. Hutton、Charlotte L. Sutherell、Andrew M. Edwards、Lindsay E. Evans、Edward W. Tate、Thomas Lanyon-Hogg
DOI:10.1016/j.bmc.2019.06.025
日期:2019.10
The global emergence of antibiotic resistance is one of the most serious challenges facing modern medicine. There is an urgent need for validation of new drug targets and the development of small molecules with novel mechanisms of action. We therefore sought to inhibit bacterial DNA repair mediated by the AddAB/RecBCD protein complexes as a means to sensitize bacteria to DNA damage caused by the host immune system or quinolone antibiotics. A rational, hypothesis-driven compound optimization identified IMP-1700 as a cell-active, nanomolar potency compound. IMP-1700 sensitized multidrug-resistant Staphylococcus aureus to the fluoroquinolone antibiotic ciprofloxacin, where resistance results from a point mutation in the fluoroquinolone target, DNA gyrase. Cellular reporter assays indicated IMP-1700 inhibited the bacterial SOS-response to DNA damage, and compoundfunctionalized Sepharose successfully pulled-down the AddAB repair complex. This work provides validation of bacterial DNA repair as a novel therapeutic target and delivers IMP-1700 as a tool molecule and starting point for therapeutic development to address the pressing challenge of antibiotic resistance.