Trovafloxacin

Trovafloxacin is a broad-spectrum quinolone antibiotic with potent activity against Gram-positive , Gram-negative and anaerobic organisms . Trovafloxacin blocks the DNA gyrase and topoisomerase IV activity. Trovafloxacin is also a potent, selective and orally active pannexin 1 channel (PANX1) inhibitor with an IC 50 of 4 μM for PANX1 inward current. Trovafloxacin does not inhibit connexin 43 gap junction or PANX2. Trovafloxacin leads to dysregulated fragmentation of apoptotic cells by inhibiting PANX1 In Vitro Trovafloxacin (20 µM; 24 hours; HepG2 cells) and tumor necrosis factor (TNF; 4 ng/mL) incubation induces apoptosis and increases leakage of lactate dehydrogenase (LDH) in HepG2 cells. Trovafloxacin (20 µM; 24 hours; HepG2 cells) and TNF (4 ng/mL) incubation increases expression of early NF-κB-related factors A20 and IκBα. Trovafloxacin prolongs TNF-induced activation of MAPKs and IKKα/β activation in HepG2. Trovafloxacin is a potent inhibitor of TO-PRO-3 uptake by apoptotic cells. Trovafloxacin also inhibits ATP release from apoptotic cells. Trovafloxacin does not inhibit caspase 3/7 activation, or caspase-mediated PANX1 cleavage during apoptosis. Trovafloxacin is equally active against both penicillin-susceptible and -resistant pneumococci, with MICs of 0.06-0.25 mg/mL reported for more than 700 isolates. The MICs of Trovafloxacin at which 90% of isolates are inhibited for 55 isolates of pneumococci is 0.125 μg/mL. MCE has not independently confirmed the accuracy of these methods. They are for reference only. Apoptosis AnalysisCell Line: HepG2 cells Concentration: 20 µM Incubation Time: 24 hours Result: Showed a gradual increase of Annexin V-staining and an increased leakage of lactate dehydrogenase (LDH) at 24 h. RT-PCRCell Line: HepG2 cells Concentration: 20 µM Incubation Time: 24 hours Result: Caused a higher increase in the transcription of A20 and IκBα in HepG2 cells. In Vivo Trovafloxacin (150 mg/kg; oral administration; male C57BL/6 J mice) treatment disrupts TNF-induced p65 nuclear translocation. Trovafloxacin treatment increases expression of early NF-κB-related factors A20 and IκBα . Trovafloxacin, when administered in combination with lipopolysaccharide (LPS) or TNF to mice induces severe liver toxicity associated with vast apoptotic areas in the liver, increased serum levels of alanine amino transferases (ALT) and pro-inflammatory cytokines . MCE has not independently confirmed the accuracy of these methods. They are for reference only. Animal Model: Male C57BL/6 J mice (9-11-week-old) injected with recombinant murine TNF ion Dosage: 150 mg/kg Administration: Oral administration Result: Showed a greater number of cells with increased nuclear/cytoplasmic p65 ratio in liver. Form:Solid IC50& Target:Quinolone

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