REVIEW Pazufloxacin mesylate is a fused tricyclic fluoroquinoline antibacterial salt with a 1-aminocyclopropyl substituent at C10 position. The presence of an aminoacyl group at C10 is a unique feature of the molecule, imparting potent broad spectrum activity against gram-positive and gram-negative bacteria including a variety of resistant strains and anaerobic bacteria. Pazufloxacin has shown multimodal mechanism of action and inhibits both DNA gyrase and topoisomerase IV enzyme, leading to increased antibacterial spectrum via DNA gyrase-dependent processes such as DNA polymerization, (ATP-dependent) DNA supercoiling, and chromosome fragmentation. Moreover, pazufloxacin has been shown to have DNA antagonistic actions too. The multimodal mechanism of action is linked to the low potential for the development of resistance in pazufloxacin. Moreover, it has been shown that pazufloxacin is not affected by efflux mechanism of resistance.
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