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Objective To compare the clinic effects of gatifloxacin and fleroxacin on respiractory infections.Methods 160 patients of low-moderate respiractory infections were divided into observation group (80 cases) and control group (80 cases).Under common therapy,the observation group accepted gatifloxacin injection while the control group accepted fleroxacin injection.The effective rate,bacterial clearance rate and untoward effect were compared between the two groups.Results The effective rate of observation group was obviously higher than control group (88.8％ vs 72.5％,x2 =3.16,P ＜ 0.05).The bacterial clearance rate of observation group was obviously higher than control group (90.0％ vs 78.8％,x2 =6.28,P ＜ 0.05).There were 5 cases of nausea and vomiting in observation group while 3 cases of nausea and 2 cases of nausea and vomiting in control group.The diverse of untoward effect of two groups had no significance (x2 =0.03,P ＞ 0.05).Conclusion Gatifloxacin has a better clinic effect than fleroxacin.Gatifkoracin doesn't increase the untoward effect on respiractory infections.
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<p><b>OBJECTIVE</b>To study the effect of fleroxacin (FLRX) on biological properties of Bloom (BLM) helicase catalytic core (BLM642-1290 helicase) in vitro and the molecular mechanism of interaction between the two molecules.</p><p><b>METHODS</b>DNA-binding and unwinding activities of BLM642-1290 helicase were assayed by fluorescence polarization and gel retardation assay under conditions that the helicase was subjected to different concentrations of FLRX. Effect of FLRX on helicase ATPase activity was analyzed by phosphorus-free assay based on a colorimetric estimation of ATP hydrolysis-produced inorganic phosphate. Molecular mechanism of interaction between the two molecules was assayed by ultraviolet and fluorescence spectra.</p><p><b>RESULTS</b>The DNA unwinding and ATPase activities of BLM642-1290 helicase were inhibited whereas the DNA-binding activity was promoted in vitro. A BLM-FLRX complex was formed through one binding site, electrostatic and hydrophobic interaction force. Moreover, the intrinsic fluorescence of the helicase was quenched by FLRX as a result of non-radioactive energy transfer. The biological activity of helicase was affected by FLRX, which may be through an allosteric mechanism and stabilization of enzyme conformation in low helicase activity state, disruption of the coupling of ATP hydrolysis to unwinding, and blocking helicase translocation on DNA strands.</p><p><b>CONCLUSION</b>FLRX may affect the biological activities and conformation of BLM642-1290 helicase, and DNA helicase may be used as a promising drug target for some diseases.</p>
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DNA , Metabolism , Fleroxacin , Pharmacology , Nucleic Acid Synthesis Inhibitors , Pharmacology , RecQ Helicases , Metabolism , Spectrometry, Fluorescence , Spectrophotometry, UltravioletABSTRACT
OBJECTIVE:To establish a New Vierordt method for assaying ingredients in compound fleroxacin suppositories and compound fleroxacin ear drops METHODS:New Vierordt method was applied to determination of fleroxacin and tinidazole in compound fleroxacin suppositories and fleroxacin and metronidazole in compound fleroxacin ear drops with no need of separation RESULTS:The fleroxacin and tinidazole in compound fleroxacin suppositories were detected at wavelength 286nm and 317nm respectively The average recoveries were 100 17% and 99 96% with RSDs=0 44% and 0 37% respectively The fleroxacin and metronidazole in the compound fleroxacin ear drops were detected at wavelength 286nm and 318nm respectively The average recoueries were 100 65% and 99 92% with RSDs=0 65% and 0 21% respectively CONCLUSION:The New Vierordt method can be used for quality control of the two compound preparations because of its convenience,accuracy and good repeatability and can eliminate mutual interference of two ingredients in preparations
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OBJECTIVE:To determine the contents of fleroxacin and tinidazole in compound fleroxacin suppository METH_ODS:RP-HPLC was used,the detecting conditions:ODS-C18 column;mobile phase,0 05mol/L lemon acid-acetonitrile(65∶35),was modulated to pH=4 0 with triethylamine;flow rate 0 8ml/min;external standard method;detective wavelength 300nm RESULTS:Linear ranges were 9 92～79 36?g/ml(for fleroxacin) 20 32～162 56?g/ml(for tinidazole) respectively wh_ere the peak areas were correlative with the concentrations,r=0 9 974 and 0 9 995 The average recoveries were 101 6% and 100 1% and RSDs was 1 4% and 1 2% respectively CONCLUSION:This detecting method is simple,rapid,accurate and suitable for determination of the contents of this preparation
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OBJECTIVE:To study the quality control,stability and therapeutic effect of compound fleroxacin ear-drops.ME_THODS:The content of fleroxacin in the ear-drops was determined by ultraviolet spectrophotometry.RESULTS:There was a good linearity in a range of concentrations from 2?g/ml to 12?g/ml,r=0.9 998,average rate of recovery was 100.38%,RSD=0.39%(n=6).The preparation showed stable quality and satisfactory effect.CONCLUSION:This ear-drops is simple in preparation,reliable in quality-control and effective in clinical use.
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0.05),and T max had signif?icant differences(P
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OBJECTIVE:To establish the preparation technic and method of qualit y control of fleroxacin-tinidazole(FLX-TNZ)hollow effervescent suppository METH ODS:36-type semi-synthetic aliphatic ester was used as base material and doub le-wavelength UV-spectrophotometry was adopted for determination of the conten ts of fleroxacin and tinidazole RESULTS:The average recovery rates(n=5)of fler oxacin and tinidazole were 99 72% and 99 08%,while RSDs were 0 95% and 1 02% respectively CONCLUSION:This method has a sound design and feasible tec hnnology
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OBJECTIVE:To observe the effects of clarithromycin and fleroxacin on Pseudomonas aeruginosa(PA) biofilm METHODS:Clinical isolates of 7 strains of PA from respiratory tract were cultured with modified plate culture method;bacterial biofilm model was identified by silver nitrate staining;MICs were determined by broth microdilution The number of viable bacteria in biofilm was measured by using MTT method and bacterial adherence was measured by crystal violet staining RESULTS:1/16MIC and 1/4MIC of clarithromycin could inhibit the adherence of PA to silica-gel film(P
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Typhoid fever remains endemic in the Philippines. Chloramphenicol remains the drug of choice but concerns on cost effectiveness have paved way to investigations on equally efficacious agents. The fluoroquinolones, specifically fleroxacin, shows promise in the treatment of typhoid fever In this clinical trial that compared efficacy and safety of chloramphenicol and fleroxacin in typhoid fever, fleroxacin was shown to be equally efficacious and safe. (Author)
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ChloramphenicolABSTRACT
OBJECTIVE:To observe the stability of fleroxacin injection. METHODS: The contents of fleroxacin injection and its degradation product were determined by HPLC method,and the effects of light, heat, pH value and halogen ion on the stability of fleroxacin injection was also studied. RESULT: The average recovery rate of the fleroxacin was 100.4%(RSD=0.87%); the color of fleroxacin injection deepened and the content of the degradation product increased if its pH value was lower or if the illuminating or heating time became longer; the sediments were separated out if met with halogen ion. CONCLUSION: The fleroxacin injection was unstable and easy to decompose under light and heat, especially under the light; the content is more likely to be decomposed if the pH value is lower;fleroxacin injection can not to be applied together with the halogen ion.