Sulfones

The sulfones are derivatives of 4,4'-diaminodiphenylsulfone (dapsone), all of which share certain pharmacological properties. Only dapsone and sulfoxone are considered here.

ANTIBACTERIAL ACTIVITY, MECHANISM OF ACTION, AND RESISTANCE

Because Mycobacterium leprae does not grow on artificial media, in vivo assays with rat footpads have been used to test potential therapeutic agents. Dapsone is bacteriostatic for M. leprae due to competitive inhibiton of dihydropteroate synthase, which prevents bacterial utilization of para-aminobenzoic acid.

M. leprae may develop drug resistance during therapy, which is termed secondary resistance; this typically occurs in lepromatous (multibacillary) patients treated with a single drug. The incidence is as high as 19%. Partial-to-complete primary resistance in previously untreated patients has been described in 2.5-40% of patients, depending on geographical location.

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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