Summit Therapeutics presented in vivo proof of concept data for the DDS-04 series of new mechanism antibiotics targeting Enterobacteriaceae in an oral session at the 29th European Congress of Clinical Microbiology & Infectious Diseases in Amsterdam. Enterobacteriaceae are a family of Gram-negative bacteria responsible for a large number of severe and often deadly infections. In the data presented, a DDS-04 series compound cured infection in a translationally-relevant animal model of urinary tract infection, one of the major sites for Enterobacteriaceae infection. Therapeutic concentrations of the DDS-04 compound were also observed in other major sites in the animal model where life-threatening Enterobacteriaceae infections occur, including the lungs and the bloodstream. With its new mechanism of action, the DDS-04 series was rapidly bactericidal and highly potent across globally diverse Enterobacteriaceae strains in research studies, which included multi-drug resistant isolates. Importantly, the DDS-04 series also showed low propensity for resistance development and did not show cross-resistance with existing classes of antibiotics, suggesting that DDS-04 compounds have the potential to overcome known resistance mechanisms. The company believes this profile makes the DDS-04 series “attractive” for further development for the treatment of Enterobacteriaceae infections.
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