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L2880

Sigma-Aldrich

Lipopolysaccharides from Escherichia coli O55:B5

purified by phenol extraction

Synonym(s):

LPS

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About This Item

EC Number:
297-473-0
MDL number:
MFCD00164401
UNSPSC Code:
12352201
NACRES:
NA.25

biological source

Escherichia coli (O55:B5)

Quality Level

300

form

lyophilized powder

purified by

phenol extraction

technique(s)

cell based assay: suitable

impurities

<3% Protein (Lowry)

color

off-white to tan

solubility

water: soluble

application(s)

cell analysis
clinical research
life science and biopharma

shipped in

ambient

storage temp.

2-8°C

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General description

Lipopolysaccharides (LPS) are glycolipids, a combination of carbohydrate units linked with single or multiple fatty acids that are found in the cell wall of Gram-negative bacteria. The LPS is an essential component of the outer membrane and the LPS structure is composed of lipid A, a glucosamine-based phospholipid, a short-core oligosaccharide, and an O-antigen, a distal polysaccharide.

Application

Lipopolysaccharide from Escherichia coli O55:B5 has been used:
  • to stimulate hepatocytes and non-parenchymal cells
  • to stimulate the spleen and study the expression of the Malitaf gene in the fish blunt snout bream
  • as part of the concanavalin A (ConA) and D-galactosamine/lipopolysaccharide (D-GalN/LPS) model of fulminant hepatitis to study the effect of the natural compound hesperetin
  • to check the cell viability of human chorionic villi-derived mesenchymal stem cells (hCMSCs) by methyl thiazolyl tetrazolium (MTT) assay
  • to induce oligodendrocyte toxicity to evaluate the neuroprotective effects of few compounds
  • to induce sarcopenia in rats to evaluate the antioxidant effects of curcumin-loaded hydrophobic surface-modified hydroxyapatite
Lipopolysaccharides (LPSs) are characteristic components of the cell wall of Gram-negative bacteria. LPS and its lipid A moiety stimulate cells of the innate immune system by the Toll-like receptor 4 (TLR4), a member of the Toll-like receptor protein family, which recognizes common pathogen-associated molecular-patterns (PAMPs).

Biochem/physiol Actions

Lipopolysaccharides (LPS) sets up a protective permeability barrier that blocks the entry of antibiotics and bile salts, which make Gram-negative bacteria innately resistant. LPS is involved in bacterial pathogenicity as the host immune system primarily encounters the LPS component of the bacteria. LPS is an endotoxin and a highly immunogenic antigen that can enhance the immune system. The lipid A of LPS stimulates host cells via toll-like receptors 4 (TLR4).

Other Notes

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For additional information on our range of Biochemicals, please complete this form.
To gain a comprehensive understanding of our extensive range of Lipopolysaccharides for your research, we encourage you to visit our Carbohydrates Category page.

related product

Product No.
Description
Pricing

pictograms

Skull and crossbones
GHS06

signalword

Danger

hcodes

H300

Hazard Classifications

Acute Tox. 2 Oral

Storage Class

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

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

Certificates of Analysis (COA)

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Identification and Characterization of Lipopolysaccharide Induced TNFa Factor from Blunt Snout Bream, Megalobrama amblycephala
Yina LV
International Journal of Molecular Sciences, 18(2), 233-233 (2017)
Xia Zheng et al.
International journal of medical sciences, 16(8), 1149-1156 (2019-09-17)
Background Sepsis, a leading cause of death in intensive care units, is generally associated with vascular dysfunction. However, its pathophysiological process has not been fully clarified, lacking in-depth knowledge of its pathophysiological process may hinder the improvement of diagnosis and
The protective effect of the natural compound hesperetin against fulminant hepatitis in vivo and in vitro
Xueting Bai
British Journal of Pharmacology, 174 (2017)
K Amor et al.
Infection and immunity, 68(3), 1116-1124 (2000-02-26)
In the lipopolysaccharides of Escherichia coli there are five distinct core oligosaccharide (core OS) structures, designated K-12 and R1 to R4. The objective of this work was to determine the prevalences of these core OS types within the species. Unique
H T L Lai et al.
Poultry science, 90(2), 337-351 (2011-01-21)
Earlier, we reported that pathogen-associated molecular patterns such as lipopolysaccharide (LPS), when administered intratracheally (i.t.), affected primary and secondary specific antibody responses to antigens administered concurrently, either i.t. or systemically, and also affected BW gain (BWG) of layers and broilers.
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