计算溶液所需的质量、体积或浓度。
Moligand™ 级 ,适用于对基线干扰要求严格的色谱和分析工作流程。
-80℃储存。特低温运输 。请查阅批次 COA 获取详细规格。
SDS、COA、产品数据表及规格说明书均可下载。可通过批号查询获取批次 COA。
在色谱分析、有机合成和交叉偶联反应领域已被 3 篇同行评审文献引用。
Rifaximin是一种胃肠道选择性的抗生素 (antibiotic),与细菌 DNA 依赖性 RNA 聚合酶的 β 亚基结合,从而抑制细菌 RNA 的合成 (bacterial RNA synthesis)。与革兰氏阴性菌(MIC:8-50 毫克/毫升)相比,Rifaximin对革兰氏阳性菌株(MIC:0.03-5 毫克/毫升)的敏感性更高。
Rifaximin 是Rifamycin SV衍生的一种半合成的,非全身性抗生素,具有抗菌活性。
Information
Rifaximin Rifaximin is a RNA synthesis inhibitor by binding the β subunit of the bacterial DNA-dependent RNA polymerase, used to treat traveler's diarrhea caused by certain bacteria.
In vitro
Rifaximin (50 μM) reduces changes in the production of proinflammatory factors caused by LPS stimulation in IEC, such as TNF-α, IL-8, Rantes and PGE2 in normal intestinal epithelial cells. Rifaximin inhibits the LPS-induced cytokine and chemokine expression by suppressing NF-κB DNA-binding activity. Rifaximin (100 μM) effectively decreases the expression of TNFα, IL-8, MIP-3α and Rantes induced by LPS stimulation (100 μg/mL). Rifaximin binds the β subunit of the bacterial DNA-dependent RNA polymerase, inhibiting the initiation of chain formation in RNA synthesis. Rifaximin has a lower MIC against gram-positive bacteria, with an MIC90 at dosages ranging from 0.01 µg/mL to 0.5 µg/mL. Rifaximin has broad-spectrum activity against aerobic and anaerobic gram-positive and gram-negative microorganisms.
In vivo
Rifaximin is highly concentrated in the intestinal tract compared with rifampicin. Rifaximin treatment results in significant induction of PXR target genes in the intestine of hPXR mice, but not in wild-type and Pxr- mice. Rifaximin-mediated activation of human PXR, but not the other xenobiotic nuclear receptors constitutive androstane receptor, peroxisome proliferator-activated receptor (PPAR)alpha, PPARgamma, and farnesoid X receptor. Rifaximin could lead to PXR-dependent hepatocellular fatty degeneration as a result of activation of genes involved in lipid uptake, thus indicating a potential adverse effect of rifaximin on liver function after long-term exposure.
Cell Data
cell lines:NCI-H441 cells
Concentrations:
Incubation Time:
Powder Purity:≥97%
| ALogP | 6.9 |
|---|
H335: 可能引起呼吸道刺激
H312: 皮肤接触有害
H332: 吸入有害
H361: 怀疑破坏生育力或未出生的孩子
P261: 避免吸入灰尘/烟雾/气体/雾/蒸汽/喷雾
P280: 戴防护手套/穿防护服/戴防护眼罩/戴防护面具。
P302+P352: 如皮肤沾染:用水充分清洗。
P321: 特殊处理(请参阅此标签上的...)。
P405: 密闭存放
P501: 将内容物/容器处理到。。。
P271: 仅在室外或通风良好的地方使用。
P304+P340: 如误吸入:将人转移到空气新鲜处,保持呼吸舒适体位。
P403+P233: 存放在通风良好的地方。保持容器密闭。
P362+P364: 脱掉沾污的衣服,清洗后方可重新使用。
P203: 使用前,获取、阅读并遵守所有安全说明。
P318: 如果暴露或担心,请就医。
P317: 寻求紧急医疗救助。
P319: 如果你感到不适,请寻求医疗帮助。