Clinafloxacin hydrochloride  (Synonyms: AM 1091 hydrochloride; CI 960 hydrochloride; PD127391 hydrochloride)

Clinafloxacin hydrochloride (AM 1091 hydrochloride) is a potent and broad-spectrum fluoroquinolone antibiotic, has inhibitory activity against gram-positive, gram-negative bacterias, and anaerobic pathogens in vitro^[1]. Clinafloxacin hydrochloride is against DNA gyrase and topoisomerase IV of S. aureus with IC₅₀ values of 0.92 µg/ml and 1.62 µg/ml, respectively^[2].

Clinafloxacin exhibits activity against S. pneumonia with an MIC of 1μg/ml for the parC-gyrA mutants^[2].
Clinafloxacin hydrochloride has antibacterial activities against target-altered mutant strains of S. aureus. It against Wild type S. aureus, gyrA mutant S. aureus and gyrA mutant S. aureus with MIC values of 0.016 µg/ml, 0.063 µg/ml and 0.915 µg/ml, respectively^[3].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Clinafloxacin is very effective for the therapy of penicillin-resistant, ciprofloxacin-susceptible pneumococcal meningitis in the rabbit model.
With the CS strain (2349)(Clinafloxacin MIC=0.12 μg/ml), at a dose of 10 mg/kg and 20 mg/kg per day Clinafloxacin achieves an initial reduction at 6 hr. Both are bactericidal at this point but presents regrowth at 24 hr, and the final reduction at 24 hr in mean log cfu/ml is 22.30 and 23.83, respectively. However, With the CR strain (4371)(Clinafloxacin MIC=0.5 μg/ml), Clinafloxacin even at 20 mg/kg per day does not decrease bacterial titers at any time point in this rabbit model of meningitis^[3].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

402.25

C₁₇H₁₈Cl₂FN₃O₃

105956-99-8

Solid

Light yellow to yellow

O=C(C1=CN(C2CC2)C3=C(C=C(F)C(N4CC(N)CC4)=C3Cl)C1=O)O.[H]Cl

Room temperature in continental US; may vary elsewhere.

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

• [1]. M Takei, et al. Target preference of 15 quinolones against Staphylococcus aureus, based on antibacterial activities and target inhibition.Antimicrob Agents Chemother. 2001 Dec;45(12):3544-7.  [Content Brief]

  [2]. Randa H Abdelkreem, et al. DNA Gyrase and Topoisomerase IV Mutations and their effect on Quinolones Resistant Proteus mirabilis among UTIs Patients. Pak J Med Sci. Sep-Oct 2020;36(6):1234-1240.  [Content Brief]

  [3]. A Domenech, et al. Experimental study of clinafloxacin alone and in combination in the treatment of ciprofloxacin-susceptible and -resistant pneumococcal meningitis.Microb Drug Resist. 2003;9 Suppl 1:S53-9.  [Content Brief]