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Nalidixic acid

CAS No. : 389-08-2

MCE 站：Nalidixic acid

产品活性：Nalidixic acid，一种喹诺酮类抗生素 (antibiotic)，对革兰氏阳性和革兰氏阴性细菌均有效。Nalidixic acid 在较低浓度下以抑菌的方式起作用，而在较高浓度下具有杀菌作用。Nalidixic acid 抑制 DNA 促旋酶和拓扑异构酶 IV 的亚基，并可逆地阻止易感细菌中的 DNA 复制。

研究领域：Anti-infection  |  Cell Cycle/DNA Damage

作用靶点：Bacterial  |  Antibiotic  |  Topoisomerase

In Vitro: Nalidixic acid is against a variety of microorganisms, it is against with Escherichia coli, Pasteurella spp., Klebsiella pneuiiioniae, Aerobacter aeroyenes, Proteus spp., Salmonella spp., Shigella spp. and Brucella spp. with MIC values of 5.0-12.5 μg/ml, 0.5-2.5 μg/ml, 0.8-25.0 μg/ml, 1.0-25.0 μg/ml, 1.25-30.0 μg/ml, 8-3.2 μg/ml, and 7.5-10.0 μg/ml, respectively.

In Vivo: The in vivo activity of Nalidixic acid is most pronounced against Gram-negative bacteria, while Gram-positive organisms are generally more resistant. Maximal activity is observed against systemic infections caused by E. coli, A. aerobacter, Proteus mirabilis, Shigella fkxneri, the ED₅₀ values are 25 mg/kg, 60 mg/kg, 50 mg/kg, and 62 mg/kg, respectively.
The acute toxicity (LD₅₀) of Nalidixic acid in mice following oral and parenteral administration is: oral, 3300 mg/kg; intravenous, 176 mg/kg, and subcutaneous, 500 mg/kg.

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