达托霉素 文献数量:1 分析标准品
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| 包装规格: | 50mg in glass bottle |
| 产品简介: | 一种环脂肽类抗生素,从链霉菌中分离得到,对革兰氏阳性菌有效。它破坏质膜,引起快速去极化,并抑制蛋白质、RNA和DNA的合成。它有效抵抗金黄色葡萄球菌感染,包括MRSA(耐甲氧西林金黄色葡萄球菌)。 |
| 溶解性: | 溶于甲醇(5mg/mL) |
| 储备液保存: | -80°C, 1 year -20°C, 6 months (sealed storage, away from moisture) |
| 体内实验: | 1、请依序添加每种溶剂: 10% DMSO→40% PEG300→5% Tween-80→45% Saline Solubility: ≥ 2.08 mg/mL (1.28 mM); 澄清溶液 此方案可获得 ≥ 2.08 mg/mL(饱和度未知)的澄清溶液。 以 1 mL 工作液为例,取 100 μL 20.8 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中,混合均匀;再向上述体系中加入50 μL Tween-80,混合均匀;然后再继续加入 450 μL 生理盐水 定容至 1 mL。 2、请依序添加每种溶剂: 10% DMSO→90% (20% SBE-β-CD in Saline) Solubility: ≥ 2.08 mg/mL (1.28 mM); 澄清溶液 此方案可获得 ≥ 2.08 mg/mL(饱和度未知)的澄清溶液。 以 1 mL 工作液为例,取 100 μL 20.8 mg/mL 的澄清 DMSO 储备液加到 900 μL 20% 的 SBE-β-CD 生理盐水水溶液 中,混合均匀。 3、请依序添加每种溶剂: 10% DMSO→90% Corn Oil Solubility: ≥ 2.08 mg/mL (1.28 mM); 澄清溶液 此方案可获得 ≥ 2.08 mg/mL(饱和度未知)的澄清溶液,此方案实验周期在半个月以上的动物实验酌情使用。 以 1 mL 工作液为例,取 100 μL 20.8 mg/mL 的澄清 DMSO 储备液加到 900 μL 玉米油中,混合均匀。 4、请依序添加每种溶剂: PBS Solubility: 100 mg/mL (61.70 mM); 澄清溶液; 超声助溶 注:建议现用现配,在短期内尽快用完。 <1mg/ml表示微溶或不溶。 普西唐提供的所有化合物浓度为内部测试所得,实际溶液度可能与公布值有所偏差,属于正常的批间细微差异现象。 请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液;一旦配成溶液,请分装保存,避免反复冻融造成的产品失效。 |
| 靶点: | Lipopeptide |
| 体外研究: | Daptomycin has excellent in-vitro inhibitory and bactericidal activity against nafcillin-susceptible and resistant staphylococci (MIC90 less than or equal to 0.5 mg/L) and against enterococci (MIC90 less than or equal to 2.0 mg/L). Daptomycin is more active than vancomycin against the majority of isolated tested. With the exception of trimethoprim-sulphamethoxazole, daptomycin is the most active agent in vitro against enterococci, and is the most active against nafcillin-resistant staphylococci. Daptomycin and vancomycin show a marked increase in MIC when the inoculum is increased from 105 to 107 cfu/mL. Daptomycin is effective within a very narrow range of drug concentrations (from 0.125 to 2.0 tLg/mL) and is more active than other agents tested against S. faecalis. Daptomycin inhibits the formation of these nucleotide-linked intermediates. |
| 体内研究: | At a dose of 10 mg/kg given twice daily, daptomycin reduces the number of organisms per kidney significantly compared with that in infected untreated controls within 48 h after the initiation of therapy. At 20 mg/kg given once a day, daptomycin is less effective but reduces colony counts significantly after 4 days of therapy, and its activity is comparable to that of vancomycin or vancomycin-gentamicin given twice daily. |
| 动物实验: | 动物模型:ICR/Swiss 小鼠 剂量:0, 1, 2.5, 5, 10, 15 或 20 mg/kg 给药处理:i.p |
| 保存条件: | −20°C |
| 注意事项: | 1、为了您的安全和健康,请穿实验服并戴一次性手套操作。 2、以上信息仅做参考交流之用。 |
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