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IMP-1700 is an inhibitor of bacterial DNA repair.1 It potentiates the activity of the quinolone antibiotic ciprofloxacin against methicillin-resistant S. aureus (MRSA) with a combination index value of 0.7. IMP-1700 inhibits the ciprofloxacin-induced bacterial SOS response, a process that repairs DNA damage, in a reporter assay in a concentration-dependent manner. It is also active against E. coli, as well as methicillin-resistant and -sensitive S. aureus, when used alone (EC50s = 0.5, 0.21, and 3.8 µM, respectively).

1.Lim, C.S.Q., Ha, K.P., Clarke, R.S., et al.Identification of a potent small-molecule inhibitor of bacterial DNA repair that potentiates quinolone antibiotic activity in methicillin-resistant Staphylococcus aureusBioorg. Med. Chem.27(20)114962(2019)

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