Mechanism Of Action

The quinolone antibiotics target bacterial DNA gyrase and topoisomerase IV. For many grampositive bacteria, topoisomerase IV is the primary target. For many gram-negative bacteria, DNA gyrase is the primary quinolone target, as illustrated in Figure 43-3. The quinolones inhibit gyrase-mediated DNA supercoiling at concentrations that correlate well with their effective antibacterial actions. Mutations of gyrA can confer resistance to these drugs. Topoisomerase IV separates catenated DNA molecules that result from DNA replication, and also is a target for quinolones.

Diabetes 2

Diabetes 2

Diabetes is a disease that affects the way your body uses food. Normally, your body converts sugars, starches and other foods into a form of sugar called glucose. Your body uses glucose for fuel. The cells receive the glucose through the bloodstream. They then use insulin a hormone made by the pancreas to absorb the glucose, convert it into energy, and either use it or store it for later use. Learn more...

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