Polymyxin B Sulfate, 5mu (C08-0504-680)

Polymyxin B Sulfate is a mixture of Polymyxin B1 and Polymyxin B2 Sulfate, obtained from Bacillus polymyxia strains. Polymyxin B inhibits gram-negative organisms in vitro and is also reported to inhibit Ca2+ dependent protein kinase C (PKC). It binds to and interferes with the permeability of the bacterial cytoplasmic membrane of gram-negative bacteria. It is used as a lipid A binding agent that induces pore formation in cell membranes and as immobilized (substrate bound) agent for removal of endotoxins. The product has been used clinically to treat infections of the urinary tract, meninges and blood stream caused by susceptible strains of Pseudomonas aeruginosa. It also has uses studying multidrug-resistant pathogens, as an immobilized agent for removal of endotoxins, and to induce pore formation in the membranes of cortex cells from excised sorghum roots. Antibiotic with bactericidal action on E. coli. Binds to the lipid A portion of bacterial lipopolysaccharides. Induces pore formation in the membranes of cortex cells from excised sorghum roots. Mode of Action: Binds to and interferes with the permeability of the cytoplasmic membrane. Antimicrobial spectrum: Gram-negative bacteria.