In vitro and in vivo potency of moxifloxacin and moxifloxacin ophthalmic solution 0.5%, a new topical fluoroquinolone.
Fluoroquinolones are a class of synthetic antibacterial agents that were approved for ocular therapy in 1991 and have become popular therapy for the treatment and prevention of various ocular infections. These agents are synthetic, broad-spectrum, rapidly bactericidal, and have good penetration into ocular tissues. Their main mechanism of action is the inhibition of bacterial enzymes needed for bacterial DNA synthesis. However, antibiotic resistance occurred swiftly to the earlier fluoroquinolones and better fluoroquinolones were needed. The fourth-generation fluoroquinolones, such as moxifloxacin and gatifloxacin, have enhanced activity against gram-positive bacteria while retaining potent activity against most gram-negative bacteria. These fourth-generation fluoroquinolones have improved penetration into the anterior chamber and have also demonstrated increased in vivo efficacy in several animal models of ocular infections. In addition, topical ophthalmic antibiotic products can deliver antibiotic concentrations directly to the eye that are thousands of times higher than their MICs. This article reviews published data describing the in vitro potency of moxifloxacin and its in vivo activity for treating and preventing experimental ocular infections.
Stroman
David W
DW
Alcon Research, Ltd., Fort Worth, TX 76134-2099, USA.
Dajcs
Joseph J
JJ
Cupp
Gale A
GA
Schlech
Barry A
BA
D000287:Administration, Topical; D000818:Animals; D001372:Aza Compounds / Q000494:pharmacology / Q000627:therapeutic use*; D001419:Bacteria / Q000187:drug effects*; D003320:Corneal Ulcer / Q000188:drug therapy* / Q000382:microbiology; D004195:Disease Models, Animal; D004352:Drug Resistance, Microbial; D015818:Eye Infections, Bacterial / Q000188:drug therapy* / Q000382:microbiology; D024841:Fluoroquinolones; D006801:Humans; D066298:In Vitro Techniques; D008826:Microbial Sensitivity Tests; D000077266:Moxifloxacin; D009883:Ophthalmic Solutions / Q000494:pharmacology / Q000627:therapeutic use; D011804:Quinolines / Q000494:pharmacology / Q000627:therapeutic use*
D001372:Aza Compounds; D024841:Fluoroquinolones; D009883:Ophthalmic Solutions; D011804:Quinolines; D000077266:Moxifloxacin