Topoisomerase II; Topoisomerase IV

In vitro activity: Moxifloxacin has an action that involves entangling a DNA drug enzyme complex and specifically blocking the ATP-dependent enzymes topoisomerase II (DNA gyrase) and topoisomerase IV. Moxipovexacin exhibits a minimum inhibitory concentration (MIC) of 0.177 μg/mL in vitro against M. tuberculosis H37Rv. Both Grampositive and Gramnegative activity are widely distributed in methyloxacin. Antibiotics such as Staphylococcus aureus, Streptococcus pneumoniae, Streptopyogenes, Haemophilus influenzae, Haemophilus parainfluenzae, Klebsiella pneumoniae, Moraxella catarrhalis, Chlamydia pneumoniae, and Mycoplasma pneumoniae are all effectively combatted by moxiloxacin in vitro and cliniquely. Moxifloxacin has activity against mycobacteria in addition to M. tuberculosis; Moxifloxacin is more active against M. kansasii than M. avium complex: specifically MIC90 for M. avium > M. intracellulare > M. kansasii at 4, 2 and 2 μg/mL, respectively. MIC90 is 16 μg/mL for M. chelonae and 0.5 μg/mL for M. fortuitum.[1]

Moxifloxacin combined with RIF/pyrazinamide (PZA) in a mouse model intended to mimic human disease shortens treatment duration by up to two months when compared to regimens with isoniazid (INH)/RIF/PZA. Mice treated twice weekly with RIF/Moxifloxacin/PZA show similar results, reaching a stable cure after 4 months, while daily treatment with RIF/INH/PZA results in a cure in 6 months. In mice, 100 mg/kg of Moxipovoxacin produces activity equivalent to that of INH; a daily dose of 400 mg/kg of Moxipovoxacin causes spleen CFU counts to be lower than those of INH, which are 25 mg/kg, but the differences are not statistically significant. In a mouse model of tuberculosis, the AUC/MIC ratio most closely corresponds with the in-vivo efficacy of fluoroquinolones. [1]

The antibiotic agent doxifloxacin (hydrochloride) is a synthetic fluoroquinolone. When compared to earlier fluoroquinolone agents, antibacterial doxifloxacin, an extended-spectrum fluoroquinolone, exhibits better coverage against gram-positive cocci and atypical pathogens while maintaining good activity against gram-negative bacteria. All common upper and lower respiratory tract pathogens are included in moxifloxacin's antibacterial spectrum, making it one of the most effective fluoroquinolones against pneumococci, including strains resistant to macrolides and penicillin. Moxifloxacin's potential for phototoxicity is limited. Moxifloxacin demonstrated bacteriologic eradication rates of 90–97% and clinical success rates of 88–97% in clinical trials. Moxifloxacin is an antimicrobial agent that is both safe and effective in treating community-acquired pneumonia, acute bacterial exacerbations of chronic bronchitis, and acute sinusitis. As shown by the production of MDA and the prolongation of survival, movifloxacin may promote lipid peroxidation and improve phagocytosis without being toxic, as shown by the white blood cell count. Clinical recommendations: Acute sinusitis, bacterial infection, acute bronchitis, and abdominal abscess toxicity CNS and gastrointestinal side effects, such as reduced activity, sleepiness, trembling, convulsions, vomiting, and diarrhea, are signs of an overdose. In rats and mice, a minimal lethal intravenous dose is 100 mg/kg.

144 white male Wistar rats (18-22 weeks; 300-400 g) infected Stenotrophomonas maltophilia
12 mg/kg
Intravenous injection; once per day, twice per day, three times per day; for 7 days

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In order to investigate the effect of moxifloxacin on survival, lipid peroxidation and inflammation in immunosuppressed rats with soft tissue infection caused by Stenotrophomonas maltophilia, 144 white male Wistar rats were randomized into six groups: Groups A and B received saline or moxifloxacin once per day, respectively; Groups C and D received saline or moxifloxacin twice per day, respectively, and Groups E and F received saline or moxifloxacin three times per day, respectively. Blood samples were taken at 6 and 30 hr after administration of S. maltophilia. Malonodialdehyde (MDA), WBC counts, bacterial tissue overgrowth, serum concentrations of moxifloxacin and survival were assessed. Survival analysis proved that treatment with moxifloxacin every 8 hr was accompanied by longer survival than occurred in any other group. Tissue cultures 30 hr after bacterial challenge showed considerably less bacterial overgrowth in the spleens and lungs of moxifloxacin-treated than in saline-treated animals, but not in their livers. At 6 hr there were no statistically significant differences between groups. However, at 30 hr, MDA concentrations were significantly greater (P = 0.044) and WBC counts significantly lower (P = 0.026) in group D than in group C. No statistically significant variations were observed between the other groups. Moxifloxacin possibly stimulates lipid peroxidation and enhances phagocytosis, as indicated by MDA production and survival prolongation, without being toxic, as indicated by WBC count. Therefore, under the appropriate conditions, moxifloxacin has a place in treatment of infections in immunosuppressed patients and of infections caused by S. maltophilia.[2]

Effects During Pregnancy and Lactation
◉ Summary of Use during Lactation
No information is available on the use of moxifloxacin during breastfeeding. Fluoroquinolones have traditionally not been used in infants because of concern about adverse effects on the infants' developing joints. However, recent studies indicate little risk. The calcium in milk might prevent absorption of the small amounts of fluoroquinolones in milk, but insufficient data exist to prove or disprove this assertion. Use of moxifloxacin is acceptable in nursing mothers with monitoring of the infant for possible effects on the gastrointestinal flora, such as diarrhea or candidiasis (thrush, diaper rash). However, it is preferable to use an alternate drug for which safety information is available.
Maternal use of an eye drop that contains moxifloxacin presents negligible risk for the nursing infant. To substantially diminish the amount of drug that reaches the breastmilk after using eye drops, place pressure over the tear duct by the corner of the eye for 1 minute or more, then remove the excess solution with an absorbent tissue.
◉ Effects in Breastfed Infants
Relevant published information was not found as of the revision date.
◉ Effects on Lactation and Breastmilk
Relevant published information was not found as of the revision date.

[1]. Pestova E, et al. Intracellular targets of moxifloxacin: a comparison with other fluoroquinolones. J Antimicrob Chemother. 2000 May;45(5):583-90.
[2]. Miyazaki E, et al. Moxifloxacin (BAY12-8039), a new 8-methoxyquinolone, is active in a mouse model of tuberculosis. Antimicrob Agents Chemother. 1999 Jan;43(1):85-9.

A fluoroquinolone that acts as an inhibitor of DNA TOPOISOMERASE II and is used as a broad-spectrum antibacterial agent.
See also: Moxifloxacin (has active moiety).

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Moxifloxacin hydrochloride is a hydrochloride comprising equimolar amounts of moxifloxacin and hydrogen chloride. It has a role as an antibacterial drug. It contains a moxifloxacinium(1+).
Moxifloxacin hydrochloride is an antibacterial prescription medicine approved by the U.S. Food and Drug Administration (FDA) for the treatment of certain bacterial infections, such as community-acquired pneumonia, acute worsening of chronic bronchitis, acute sinus infections, plague, and skin and abdominal infections.
Community-acquired pneumonia, a bacterial respiratory infection, can be an opportunistic infection (OI) of HIV.
Moxifloxacin Hydrochloride is the hydrochloride salt of a fluoroquinolone antibacterial antibiotic. Moxifloxacin binds to and inhibits the bacterial enzymes DNA gyrase (topoisomerase II) and topoisomerase IV, resulting in inhibition of DNA replication and repair and cell death in sensitive bacterial species.
A fluoroquinolone that acts as an inhibitor of DNA TOPOISOMERASE II and is used as a broad-spectrum antibacterial agent.
See also: Moxifloxacin (has active moiety).

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Drug Indication
Acute Exacerbation of Chronic Bronchitis, Community Acquired Pneumonia, Complicated Intra-Abdominal Infection, Complicated Skin and Skin Structure Infections, Pelvic Inflammatory Disease, Treatment of acute bacterial sinusitis
Acute Exacerbation of Chronic Bronchitis, Community Acquired Pneumonia, Complicated Intra-Abdominal Infection, Complicated Skin and Skin Structure Infections, Pelvic Inflammatory Disease, Treatment of acute bacterial sinusitis
Acute Exacerbation of Chronic Bronchitis, Community Acquired Pneumonia, Complicated Intra-Abdominal Infection, Complicated Skin and Skin Structure Infections, Pelvic Inflammatory Disease, Treatment of acute bacterial sinusitis
Acute Exacerbation of Chronic Bronchitis, Community Acquired Pneumonia, Complicated Intra-Abdominal Infection, Complicated Skin and Skin Structure Infections, Pelvic Inflammatory Disease, Treatment of acute bacterial sinusitis.

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The activity, pharmacokinetics, pharmacodynamics, efficacy, safety, drug interactions, and dosage and administration of moxifloxacin are reviewed. Moxifloxacin is an oral 8-methoxyquinolone antimicrobial approved in December 1999 for use in the treatment of acute bacterial sinusitis, acute bacterial exacerbations of chronic bronchitis, and community-acquired pneumonia. This fluoroquinolone is active against common community-acquired respiratory pathogens (Streptococcus pneumoniae, Haemophilus influenzae, Moraxella catarrhalis), atypical pathogens, and many anaerobes. Moxifloxacin has an absolute bioavailability of 90% after oral administration and a mean elimination half-life of 12 hours. The drug is not a substrate or inhibitor of the hepatic cytochrome P-450 isoenzyme system thereby avoiding many potential drug interactions. Moxifloxacin has limited phototoxic potential. In clinical trials, moxifloxacin had clinical success rates of 88-97% and bacteriologic eradication rates of 90-97%. Reported adverse effects were primarily gastrointestinal (nausea, diarrhea) and were mild to moderate in severity. Moxifloxacin prolongs the QT interval by a mean + S.D. of 6 +/- 26 milliseconds above baseline and should be used with caution in patients with proarrhythmic conditions and avoided in patients receiving antiarrhythmia agents, such as quinidine, procainamide, amiodarone, and sotalol. The standard oral dosage is 400 mg once a day. Dosage adjustment is unnecessary in patients with renal dysfunction or mild to moderate hepatic dysfunction. Moxifloxacin is a safe and effective antimicrobial that will be useful for treating acute sinusitis, acute bacterial exacerbations of chronic bronchitis, and community-acquired pneumonia.[1]

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Moxifloxacin is an extended-spectrum fluoroquinolone which has improved coverage against gram-positive cocci and atypical pathogens compared with older fluoroquinolone agents, while retaining good activity against gram-negative bacteria. The antibacterial spectrum of moxifloxacin includes all major upper and lower respiratory tract pathogens; it is one of the most active fluoroquinolones against pneumococci, including penicillin- and macrolide-resistant strains. In in vitro studies, emergence of bacterial resistance was less common with moxifloxacin than with some other fluoroquinolones, but this requires confirmation in large-scale clinical studies. As with other fluoroquinolones, moxifloxacin achieves good penetration into respiratory tissues and fluids. It shows a low potential for drug interactions and dosage adjustment is not required for patients of advanced age or those with renal or mild hepatic impairment. The efficacy of oral moxifloxacin has been demonstrated in large, well-designed clinical trials in patients with community-acquired pneumonia, acute exacerbations of chronic bronchitis or acute sinusitis. Moxifloxacin 400 mg once daily achieved bacteriological and clinical success rates of approximately 90% or higher. It was as effective as, or more effective than, comparators including clarithromycin, cefuroxime axetil and high dose amoxicillin in these trials. The most commonly reported adverse events in patients receiving moxifloxacin are gastrointestinal disturbances. Moxifloxacin is also associated with QTc prolongation in some patients; there are, as yet, no data concerning the possible clinical sequelae of this effect in high-risk patients. Moxifloxacin has a low propensity for causing phototoxic reactions relative to other fluoroquinolones, and animal data suggest that it has a low potential for causing excitatory CNS and hepatotoxic effects.[3]

C21H27CLFN3O5

455.91

455.162

C, 55.32; H, 5.97; Cl, 7.78; F, 4.17; N, 9.22; O, 17.55

192927-63-2

Moxifloxacin Hydrochloride;186826-86-8; 151096-09-2; 192927-63-2 (HCl hydrate) ; (Rac)-Moxifloxacin;354812-41-2;Moxifloxacin-d4;2596386-23-9;Moxifloxacin-d3 hydrochloride;2734919-98-1;Moxifloxacin-d3-1 hydrochloride;1246816-75-0;Moxifloxacin-13C,d3 hydrochloride;rac cis-Moxifloxacin-d4 hydrochloride;1217802-65-7

9890250

Typically exists as solid at room temperature

243-246°C dec.

4.56E-17mmHg at 25°C

3.502

4

9

4

31

727

2

Cl[H].FC1C([H])=C2C(C(C(=O)O[H])=C([H])N(C2=C(C=1N1C([H])([H])[C@]2([H])[C@@]([H])(C([H])([H])C([H])([H])C([H])([H])N2[H])C1([H])[H])OC([H])([H])[H])C1([H])C([H])([H])C1([H])[H])=O.O([H])[H]

SKZIMSDWAIZNDD-WJMOHVQJSA-N

InChI=1S/C21H24FN3O4.ClH.H2O/c1-29-20-17-13(19(26)14(21(27)28)9-25(17)12-4-5-12)7-15(22)18(20)24-8-11-3-2-6-23-16(11)10-24;;/h7,9,11-12,16,23H,2-6,8,10H2,1H3,(H,27,28);1H;1H2/t11-,16+;;/m0../s1

7-[(4aS,7aS)-1,2,3,4,4a,5,7,7a-octahydropyrrolo[3,4-b]pyridin-6-yl]-1-cyclopropyl-6-fluoro-8-methoxy-4-oxoquinoline-3-carboxylic acid;hydrate;hydrochloride

Moxifloxacin hydrochloride monohydrate; 192927-63-2; Actira; DTXSID1049063; UNII-B8956S8609; B8956S8609; DTXCID2028989; 1-Cyclopropyl-6-fluoro-7-((4aS,7aS)-hexahydro-1H-pyrrolo[3,4-b]pyridin-6(2H)-yl)-8-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid hydrochloride hydrate;

2934.99.9001

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples

Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples.

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Injection Formulation 1: DMSO : Tween 80： Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline)
*Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution.
Injection Formulation 2: DMSO : PEG300 ：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline)
Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO → 900 μL Corn oil)
Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals).

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Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO → 900 μL (20% SBE-β-CD in saline)]
*Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.
Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin → 500 μL Saline)
Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO → 100 μLPEG300 → 200 μL castor oil → 650 μL Saline)
Injection Formulation 7: Ethanol : Cremophor : Saline = 10： 10 : 80 (i.e. 100 μL Ethanol → 100 μL Cremophor → 800 μL Saline)
Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline
Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH → 900 μL Corn oil)
Injection Formulation 10: EtOH : PEG300：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline)

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Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium)
Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose
Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals).

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Oral Formulation 3: Dissolved in PEG400
Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose
Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose
Oral Formulation 6: Mixing with food powders

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Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.

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 (Please use freshly prepared in vivo formulations for optimal results.)