1. Immunology/Inflammation
  2. Toll-like Receptor (TLR)
  3. Lipopolysaccharides, from Klebsiella pneumoniae

Lipopolysaccharides, from Klebsiella pneumoniae  (Synonyms: LPS, from bacterial (Klebsiella pneumoniae))

目录号: HY-D1056B3
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Lipopolysaccharides, from Klebsiella pneumoniae (LPS, from bacterial (Klebsiella pneumoniae)) 是来源于肺炎克雷伯杆菌 (Klebsiella pneumoniae) 的脂多糖内毒素和 TLR4 激活剂,是一种 S 型 LPS。Lipopolysaccharides, from Klebsiella pneumoniae 具有典型的 3 部分结构:O 抗原、核心寡糖和脂质 A。Lipopolysaccharides, from Klebsiella pneumoniae 可能参与细菌的免疫逃逸,通过抑制补体介导的杀伤作用,同时抑制宿主分泌抗菌肽,而使细菌逃避免疫防御。Lipopolysaccharides, from Klebsiella pneumoniae 具有高滞粘性和抗血清杀伤特性,可能引起脓毒症。Lipopolysaccharides, from Klebsiella pneumoniae 可用于构建动物败血症/脓毒症模型。
建议配制 ≥2 mg/mL 母液,并保证充分混合溶解。由于 LPS 具有吸附特性,分装保存时需使用低吸附离心管

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Lipopolysaccharides, from Klebsiella pneumoniae Chemical Structure

Lipopolysaccharides, from Klebsiella pneumoniae Chemical Structure

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查看 Toll-like Receptor (TLR) 亚型特异性产品:

  • 生物活性

  • 纯度 & 产品资料

  • 参考文献

生物活性

Lipopolysaccharides, from Klebsiella pneumoniae (LPS, from bacterial (Klebsiella pneumoniae)) are lipopolysaccharide endotoxins and TLR4 activators derived from Klebsiella pneumoniae, and are classified as S-type LPS. Lipopolysaccharides, from Klebsiella pneumoniae exhibit a typical three-part structure: O-antigen, core oligosaccharide, and lipid A. Lipopolysaccharides, from Klebsiella pneumoniae may participate in bacterial immune evasion by inhibiting complement-mediated killing and suppressing the host's secretion of antimicrobial peptides, thereby allowing the bacteria to escape immune defenses. Lipopolysaccharides, from Klebsiella pneumoniae possess high viscosity and resistance to serum-mediated killing, which may lead to sepsis. Lipopolysaccharides, from Klebsiella pneumoniae can be used to construct animal models of sepsis[1][2].
It is recommended to prepare a stock solution of ≥2 mg/mL and ensure that it is fully mixed and dissolved. Due to the adsorption characteristics of LPS, low adsorption centrifuge tubes should be used for aliquoting and storage.

IC50 & Target

TLR-4[2]

体外研究
(In Vitro)

Note:
1. 为了保持 LPS 的完整性,建议将 LPS 溶液存放在硅烷化容器中。因为 LPS 可以粘附在塑料和某些类型的玻璃上,尤其是在浓度低于 0.1 mg/mL 时。如果 LPS 浓度超过 1 mg/mL,这种吸附作用相对较小,建议配制 ≥2 mg/mL 母液,并充分涡旋震荡 10 分钟以上,必要时辅助超声,保证充分混合溶解。如果使用玻璃容器,请确保使用前充分混合至少 30 分钟,以重新溶解任何吸附在管壁的 LPS。
2. LPS 是一种能在溶液中形成不同尺寸胶束的分子,分子量不固定,储备液及工作液可直接配制成质量浓度 (mg/mL, μg/mL, etc.)
3. LPS 溶于水或 PBS 后可能会观察到均匀的浑浊溶液,如需过滤除菌,请勿直接过滤储备液,建议稀释成工作液之后用 0.22 μm 的滤膜过滤除菌

Klebsiella pneumoniae 的脂多糖在 O-3 位置可以将 l,d-HeppII 替换为α -d-半乳糖醛酸残基 (α-d-GalpA) 残基,在大多数研究的肠杆菌科 (Enterobacteriaceae) 中,核心 LPS 包含内核磷酸化修饰,但 Klebsiella pneumoniae 的核心 LPS 没有这种修饰。这种特殊的核心结构决定了 Klebsiella pneumoniae 的外膜通透性和特殊发病机制[1]
Lipopolysaccharides, from Klebsiella pneumoniae 和细菌的荚膜多糖 (capsule polysaccharide, CPS) 一起促进脓毒症的发展,但只有 CPS 参与肺炎克雷伯菌诱导的肺部感染,因为只有 CPS 调节补体 C3 的沉积,并保护病原体免受肺泡巨噬细胞介导的吞噬[2]

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

体内研究
(In Vivo)

Lipopolysaccharides, from Klebsiella pneumoniae 和荚膜多糖 (CPS) 都是肺炎克雷伯菌的重要毒力因子,而 CPS 在抗吞噬、抑制早期炎症反应、抵抗抗菌肽、和抑制树突细胞成熟方面具有重要作用。建议搭配 PCS 一起构建动物疾病诱导模型[2]
Lipopolysaccharides, from Klebsiella pneumoniae (0.05 μg/只;气管滴注) 在小鼠高血糖模型中,减少肺部粒细胞募集,降低 CXCL1、CXCL2、IL-1β 和 TNF-α 在早期产生,并抑制 TLR2 和 TIRAP 的表达。该特性进一步增加了对肺炎克雷伯菌感染的易感性[3]

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Model: Male C57BL/6 mice, streptozotocin-induced diabetes mouse model[3]
Dosage: 0.05 μg of Klebsiella pneumoniae LPS in 50 μL of PBS
Administration: Tracheal instillation
Result: Resulted a significant reduction in survival compared to control mice after tracheal instillation of Klebsiella pneumoniae.
Induced recruitement of fewer granulocytes to the alveolar airspace and reduced early production of CXCL1, CXCL2, IL-1β and TNF-α following tracheal instillation of Klebsiella pneumoniae-lipopolysaccharide.
Additionally, decreased TLR2 and TIRAP expression following in hyperglycemic mice.
性状

固体

颜色

White to off-white

中文名称

脂多糖,来源于肺炎克雷伯氏杆菌

运输条件

Room temperature in continental US; may vary elsewhere.

储存方式
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 6 months
-20°C 1 month
溶解性数据
细胞实验: 

H2O 中的溶解度 : 5 mg/mL (超声加热助溶; DMSO can inactivate Lipopolysaccharides, from Klebsiella pneumoniae's activity)

  • 摩尔计算器

  • 稀释计算器

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

质量
=
浓度
×
体积
×
分子量 *

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

浓度 (start)

C1

×
体积 (start)

V1

=
浓度 (final)

C2

×
体积 (final)

V2

动物溶解方案计算器
请输入动物实验的基本信息:

给药剂量

mg/kg

动物的平均体重

g

每只动物的给药体积

μL

动物数量

由于实验过程有损耗,建议您多配一只动物的量
计算结果
工作液所需浓度 : mg/mL
您所需的储备液浓度超过该产品的实测溶解度,如有需要,请与 MCE 中国技术支持联系。
纯度 & 产品资料

参考文献

Lipopolysaccharides, from Klebsiella pneumoniae 相关分类

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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Lipopolysaccharides, from Klebsiella pneumoniae
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