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Merck
CN

L2880

Sigma-Aldrich

脂多糖 来源于大肠杆菌 055:B5

purified by phenol extraction

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别名:
LPS
EC 号:
MDL编号:
UNSPSC代码:
12352201
NACRES:
NA.25

生物来源

Escherichia coli (O55:B5)

质量水平

形式

lyophilized powder

纯化方式

phenol extraction

技术

cell based assay: suitable

杂质

<3% Protein (Lowry)

颜色

off-white to tan

溶解性

water: soluble

应用

cell analysis
clinical research
life science and biopharma

运输

ambient

储存温度

2-8°C

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一般描述

脂多糖 (LPS) 是糖脂,由连接单个或多个脂肪酸的碳水化合物单元组合而成,存在于革兰氏阴性菌细胞壁中。LPS是外膜的重要组成部分,结构由脂质A、葡萄糖胺基磷脂、短核寡糖和O-抗原(远端多糖)组成。

应用

来自大肠杆菌O55:B5的脂多糖已用于:
  • 刺激肝细胞和非实质细胞
  • 刺激脾脏并研究Malitaf基因在鱼钝头鲷中的表达
  • 作为伴刀豆球蛋白A(ConA)和D-半乳糖胺/脂多糖(D-GalN/LPS)暴发性肝炎模型的一部分用于研究天然化合物橙皮素的作用
  • 诱导少突胶质细胞毒性,以评估几种化合物的神经保护作用
  • 诱导大鼠肌少症,以评估载姜黄素疏水表面改性羟基磷灰石的抗氧化作用
脂多糖(LPS)是革兰氏阴性细菌细胞壁的特征组分。脂多糖及其脂质 A 部分通过 Toll 样受体 4(TLR4)刺激先天免疫系统的细胞,Toll 样受体 4是 Toll 样受体蛋白家族的成员,其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) 建立起保护性渗透屏障,阻止抗生素和胆汁盐进入,从而使革兰氏阴性菌具备天然耐药性。LPS影响细菌致病性,毕竟宿主免疫系统主要面对的是细菌LPS成分。LPS是一种内毒素兼高免疫原性抗原,可以增强免疫系统。LPS 的脂质 A 通过 Toll 样受体 4 (TLR4) 刺激宿主细胞。

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。
For additional information on our range of Biochemicals, please complete this form.
For optimal reconstitution of LPS products, an intensive vortex is required before use, regardless of the container type. Ensure that the storage solution concentration is at least 1 mg/ml. While borosilicate (silanized) containers are recommended, polypropylene (PP) plastic containers may also be used.

象形图

Skull and crossbones

警示用语:

Danger

危险声明

危险分类

Acute Tox. 2 Oral

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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