Rifalazil (Synonyms:利福拉齐; KRM-1648; ABI-1648)
目录号 : KM2625 CAS No. : 129791-92-0 纯度 : 98%

Rifalazil (ABI-1648; KRM-1648) 是利福霉素衍生物,可抑制细菌依赖 DNA 的 RNA 聚合酶 (RNA polymerase) 并阻断 RNA 聚合酶中的 β 亚基从而杀死细菌感染的细胞。Rifalazil (ABI-1648; KRM-1648) 是一种抗生素 (antibiotic),对分枝杆菌,革兰氏阳性细菌,幽门螺杆菌,肺炎衣原体和沙眼衣原体有抑制作用,其 MIC 值在 0.00025 至 0.0025 μg/ml 之间。Rifalazil (ABI-1648; KRM-1648) 有潜力用于衣原体感染,梭菌相关性腹泻菌感染 (CDAD) 和结核病 (TB) 研究的相关研究。

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50mg
In-stock
100mg
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250mg
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500mg 询价 In-stock
1g 询价 In-stock

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生物活性

Rifalazil (KRM-1648; ABI-1648), a rifamycin derivative, inhibits the bacterial DNA-dependent RNA polymerase and kills bacterial cells by blocking off the β-subunit in RNA polymerase. Rifalazil (KRM-1648; ABI-1648) is an antibiotic, exhibits high potency against mycobacteria, gram-positive bacteria, Helicobacter pyloriC. pneumoniae and C. trachomatis with MIC values from 0.00025 to 0.0025 μg/ml. Rifalazil (KRM-1648; ABI-1648) has the potential for the treatment of Chlamydia infection, Clostridium difficile associated diarrhea (CDAD), and tuberculosis (TB).

体外研究

Rifalazil exhibits antimicrobal activity against Gram-positive enteric bacteria, inhibits Clostridium difficile, Clostridium perfringens, Bacteroides fragilis with MIC50 value of 0.0015, 0.0039, 0.0313 µg/ml, respectively.
Rifalazil exhibits antimicrobal activity against Gram-negative enteric bacteria, inhibits Escherichia coli and Klebsiella pneumoniae with MIC50 value of 16 and 16 µg/ml, respectively.
Rifalazil exhibits antimicrobal activity against non-enteric Gram-positive bacteria, inhibits Methicillin-susceptible Staphylococcus aureus, Methicillin-resistant S. aureus, Methicillin- and quinolone-resistant S. aureus, Staphylococcus epidermidis, Streptococcus pyogenes, Streptococcus pneumoniae with MIC50 value of 0.0078, 0.0078, 0.0078, 0.0078, 0.0002, 0.0001 µg/ml, respectively.
Rifalazil exhibits antimicrobal activity against Helicobacter pylori, Chlamydia pneumoniae and Chlamydia trachomatis with MIC50 value of 0.004, 0.000125 and 0.00025 µg/ml, respectively.

体内研究

Rifalazil (oral gavage; 20, 25, and 150 mg/kg; 6-8 weeks) combines with isoniazid (INH) for 6 weeks or greater significantly reduced the number of mice per group in which M. tuberculosis is detected in both spleens and lungs compared to the reductions for the early and late controls. And the addition of Pyrazinamide (PZA) does not significantly improve RLZ-INH therapy at any time point.

Animal Model: Female CD-1 mice infected with 5.2 × 10 viable mycobacteria
Dosage: 20, 25, and 150 mg/kg; 6-8 weeks
Administration: Oral gavage
Result: Combined with isoniazid (INH) showed its potential for short-course treatment of Mycobacterium tuberculosis infection.
分子式
C51H64N4O13
分子量
941.07
CAS号
129791-92-0
中文名称
利福拉齐
运输条件

Room temperature in continental US; may vary elsewhere.

储存方式

4°C, sealed storage, away from moisture

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

溶解性数据
In Vitro: 

DMSO : 8.33 mg/mL (8.85 mM; Need ultrasonic)

配制储备液
浓度 溶剂体积 质量 1 mg 5 mg 10 mg
1 mM 1.0626 mL 5.3131 mL 10.6262 mL
5 mM 0.2125 mL 1.0626 mL 2.1252 mL
10 mM --- --- ---
*

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。
储备液的保存方式和期限:-80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)。-80°C 储存时,请在 6 个月内使用,-20°C 储存时,请在 1 个月内使用。

In Vivo:

请根据您的实验动物和给药方式选择适当的溶解方案。以下溶解方案都请先按照 In Vitro 方式配制澄清的储备液,再依次添加助溶剂:

——为保证实验结果的可靠性,澄清的储备液可以根据储存条件,适当保存;体内实验的工作液,建议您现用现配,当天使用; 以下溶剂前显示的百
分比是指该溶剂在您配制终溶液中的体积占比;如在配制过程中出现沉淀、析出现象,可以通过加热和/或超声的方式助溶

  • 1.

    请依序添加每种溶剂: 10% DMSO    40% PEG300    5% Tween-80    45% saline

    Solubility: ≥ 2.2 mg/mL (2.34 mM); Clear solution

    此方案可获得 ≥ 2.2 mg/mL (2.34 mM,饱和度未知) 的澄清溶液。

    以 1 mL 工作液为例,取 100 μL 22.0 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中,混合均匀;向上述体系中加入50 μL Tween-80,混合均匀;然后继续加入 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: ≥ 2.2 mg/mL (2.34 mM); Clear solution

    此方案可获得 ≥ 2.2 mg/mL (2.34 mM,饱和度未知) 的澄清溶液。

    以 1 mL 工作液为例,取 100 μL 22.0 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。

临床试验
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