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Drug Des Devel Ther, 11, 881-891

Delafloxacin: Design, Development and Potential Place in Therapy


Delafloxacin: Design, Development and Potential Place in Therapy

Francisco Javier Candel et al. Drug Des Devel Ther.


Delafloxacin (DLX) is a new fluoroquinolone pending approval, which has shown a good in vitro and in vivo activity against major pathogens associated with skin and soft tissue infections and community-acquired respiratory tract infections. DLX also shows good activity against a broad spectrum of microorganisms, including those resistant to other fluoroquinolones, as methicillin-resistant Staphylococcus aureus. Its pharmacokinetic properties and excellent activity in acidic environments make DLX an alternative in the treatment of these and other infections. In this manuscript, a detailed analysis of this new fluoroquinolone is performed, from its chemical structure to its in vivo activity in recently published clinical trials. Its possible place in the current antimicrobial outlook and in other infectious models is also discussed.

Keywords: Delafloxacin; fluoroquinolones; methicillin-resistant Staphylococcus aureus; therapy.

Conflict of interest statement

Disclosure The authors declare no conflicts of interest in this work and have not received financial support.


Figure 1
Figure 1
Chemical structure of DLX compared with other quinolones (LVX, CPX, MXL).
Note: As DLX lacks a protonable substituent group in position 7, it is more acidic than other quinolones.
Abbreviations: CPX, ciprofloxacin; LVX, levofloxacin; MXL, moxifloxacin.
Figure 2
Figure 2
Predominant form of DLX (top) and MXL (bottom) at acidic and neutral pH.
Notes: The absence of a basic group in C7 allows DLX to be neutral at acidic pH and anionic at physiological pH. The opposite happens with MXL.
Abbreviations: DLX, delafloxacin; MXL, moxifloxacin.

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