Merck
CN

L6893

Sigma-Aldrich

脂多糖(粗糙型菌株) 来源于大肠杆菌 F583(Rd 突变体)

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别名:
LPS
EC 号:
MDL编号:
NACRES:
NA.25

生物来源

Escherichia coli (F583 Rd mutant)

质量水平

形式

lyophilized powder

杂质

<3% Protein (Lowry)

颜色

white to yellow cast

溶解性

water: 4.90-5.10 mg/mL, cloudy to turbid, colorless to faintly yellow

运输

ambient

储存温度

2-8°C

一般描述

本品是使用苯酚:氯仿:石油醚从大肠杆菌EH 583(Rd突变株)中提取的。来源菌株来自私人保藏。

应用

脂多糖(LPS)是革兰氏阴性菌细胞壁的特征性成分。LPS及其脂质A部分可通过Toll样受体4(TLR4)刺激先天免疫系统细胞,TLR4是Toll样受体蛋白家族的成员,它能识别常见的病原体相关分子模式(PAMP)。

生化/生理作用

脂多糖(LPS)位于膜的外层,并且暴露在无包膜菌株的细胞表面。它们有助于维持外层膜的完整性,并保护细胞免受胆汁盐和亲脂性抗生素的破坏。

制备说明

通过苯酚-氯仿-石油醚萃取进行制备。

本品溶于水(5 mg/ml)或细胞培养基(1 mg/ml),得到浑浊的淡黄色溶液。以盐水为溶剂时,经过涡旋并加热至70-80 oC后,得到浓度更高但仍然浑浊的溶液(20 mg/ml)。脂多糖分子可在各种溶剂中形成胶束。在水和磷酸盐缓冲盐水中,可观察到混浊的溶液。使用有机溶剂不会得到更澄清的溶液。以甲醇为溶剂将得到含漂浮物的混浊悬浮液,而以水为溶剂将得到均匀的混浊溶液。

其他说明

为了全面了解我们针对客户研究提供的各种脂多糖产品,建议您访问我们的碳水化合物分类页面。

象形图

Skull and crossbones

警示用语:

Danger

危险声明

危险分类

Acute Tox. 2 Oral

储存分类代码

6.1A - Combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 3

闪点(°F)

Not applicable

闪点(°C)

Not applicable

个人防护装备

Eyeshields, Gloves, type N95 (US)


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M Worku et al.
Journal of dairy science, 92(7), 3185-3193 (2009-06-17)
The objective of this study was to evaluate the effect of smooth (S) and rough (R) forms of lipopolysaccharide (LPS) on gene expression in bovine blood neutrophils. Isolated neutrophils (10(7) cells/mL) were treated with Escherichia coli LPS serotype O111:B4 (S+R)
Chandan Singh et al.
Molecular microbiology, 114(3), 510-520 (2020-05-29)
The outer membrane is a key virulence determinant of gram-negative bacteria. In Yersinia pestis, the deadly agent that causes plague, the protein Ail and lipopolysaccharide (LPS)6 enhance lethality by promoting resistance to human innate immunity and antibiotics, enabling bacteria to
Yawen Ni et al.
PloS one, 12(2), e0170346-e0170346 (2017-02-09)
Occludin is a key tight junction (TJ) protein in cerebral endothelial cells (CECs) playing an important role in modulating blood-brain barrier (BBB) functions. This protein (65kDa) has been shown to engage in many signaling pathways and phosphorylation by both tyrosine
J S Nielsen et al.
Scandinavian journal of immunology, 75(2), 193-202 (2011-08-23)
Immunosuppression induced by lymphocyte apoptosis is considered an important factor in the pathogenesis of sepsis and has been demonstrated in both animal models of lipopolysaccharide (LPS)-induced endotoxemia and septic patients. As rough-form LPS (R-LPS) has recently been shown to elicit
Iga Kucharska et al.
Biochemistry, 55(36), 5061-5072 (2016-08-18)
Pseudomonas aeruginosa is an opportunistic human pathogen causing pneumonias that are particularly severe in cystic fibrosis and immunocompromised patients. The outer membrane (OM) of P. aeruginosa is much less permeable to nutrients and other chemical compounds than that of Escherichia

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