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Polymyxin B(sulfate)
本产品不向个人销售,仅用作科学研究,不用于任何人体实验及非科研性质的动物实验。
Polymyxin B(sulfate)图片
CAS NO:1405-20-5
规格:98%
分子量:1301.6
包装与价格:
包装价格(元)
1g电议
5g电议

产品介绍
bactericidal activity against major multidrug-resistant Gram-negative bacteria.
CAS:1405-20-5
分子式:C56H98N16O13 ? H2SO4
分子量:1301.6
纯度:98%
存储:Store at -20°C

Background:

Polymyxin B, a mixture of polymyxins B1 and B2, is obtained from Bacillus polymyxa strains. Polymyxin B exhibits bactericidal activity against major multidrug-resistant gram-negative bacteria, most fungi and gram-positive bacteria. As basic polypeptides of about eight amino acids, polymyxins B1 and B2 have cationic detergent action on cell membranes. Moreover, polymyxin B is used for infections with gram-negative organisms, which may be nephrotoxic and neurotoxic. Polymyxin B is appropriate to treat the infections of the meninges, urinary tract, and blood stream, triggered by susceptible Pseudomonas aeruginosa strains.


In vitro: Polymyxin B elicited up-regulation of dendritic cells (DCs) maturation markers, including the increase in the in the expression of co-stimulatory molecule CD86 and HLA-class I and II molecules. Polymyxin B induced a progressive increase in the adhesion property of human DCs. In addition, polymyxin B triggered the activation of the ERK1/2 pathway and IκB-α/NF-κB pathways [1].


In vivo: Male bacteraemia ddY mice were subcutaneously treated with polymyxin B at a dose of 5, 10, 15 or 20 mg/kg for 7 days. Polymyxin B, in a dose-dependent fashion, improved the survival both of OU-01062- and OU-98039-infected mice. In polymyxin B-treated mice, except for 5 mg/kg polymyxin B, the viable cell counts had a tendency to reduce steadily in each concentration group. It was showed a rapid and marked decline of bacterial cell count between 3 to 6 h after infection [2].


参考文献:
[1].  Valentinis, B., Bianchi, A., Zhou, D., Cipponi, A., Catalanotti, F., Russo, V., & Traversari, C. Direct Effects of Polymyxin B on Human Dendritic Cells Maturation: THE ROLE OF I B- /NF- B AND ERK1/2 PATHWAYS AND ADHESION. Journal of Biological Chemistry. 2005; 280(14): 14264-14271.
[2].  Miyajima, Y., Hiramatsu, K., Mizukami, E., Morinaga, R., Ishii, H., & Shirai, R. et al. In vitro and in vivo potency of polymyxin B against IMP-type metallo-β-lactamase-producing Pseudomonas aeruginosa. International Journal of Antimicrobial Agents. 2008; 32(5): 437-440.