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Colistin sulfate

CAS No. : 1264⁻⁷2-8

MCE 国际站：Colistin sulfate

产品活性：Colistin是一种多肽抗生素，其通过与革兰氏阴性细菌的外细胞膜中的脂多糖和磷脂结合来抑制革兰氏阴性细菌。

研究领域：Anti-infection | Autophagy

作用靶点：Bacterial | Autophagy | Antibiotic

In Vitro: Colistins are bactericidal to gram-negative bacteria by a detergent-like mechanism. This mechanism involves interaction with lipopolysaccharides and phospholipids of the outer membrane and electrostatic interference with the outer membrane by competitively displacing divalent cations (calcium and magnesium) from the negatively charged phosphate groups of membrane lipids. Colistin (polymyxin E) owns favorable properties of rapid bacterial killing, a narrow spectrum of activity, and an associated slow development of resistance for the treatment of infections caused by multidrug-resistant gram-negative bacteria. There are two forms of colistin available commercially: colistin (sulfate) mainly for topical use and colistin methanesulfonate (sodium) for parenteral use.

In Vivo: High concentrations of colistin in rat ELF are achieved as a result of slow and sustained CMS conversion following i.t. instillation. Colistin is often used in piglets but underdosing and overdosing are frequent. Under- or overdoses of colistin do not result in any major disturbance of piglet fecal microbiota and rarely select for chromosomal resistance in the dominant E. coli population.

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