Some proteins embedded in the structure of prions may have antimicrobial activity, according to a study led by scientists at the University of Pennsylvania. An AI analysis of millions of fragments from prion-related proteins has revealed more than a thousand peptides that disrupt bacterial membranes and reduce infection in animal models, suggesting these proteins could be an unexpected source of new antibiotics.

Four years after the U.S. FDA issued a complete response letter for Spero Therapeutics Inc.’s oral antibiotic, tebipenem pivoxil hydrobromide, to treat complicated urinary tract infections (cUTI), including pyelonephritis, the agency approved the drug based on phase III data showing noninferiority to intravenous imipenem-cilastatin.

CARB-X is awarding $1.2 million to the Andrew G. Myers research group at Harvard University to develop enhanced antibiotics that target multidrug-resistant gram-negative bacterial pathogens, including Escherichia coli and Klebsiella pneumoniae, to treat urinary tract infections, pneumonia and bloodstream infections.