Human TNF RI enzyme-linked immunoassay kit
概述
产品名称
Human TNF RI enzyme-linked immunoassay kit
产品类型
DTSet Elisa Kit
| pg/ml | O.D. | Average | Corrected | |
|---|---|---|---|---|
| 0.00 | 0.0711 | 0.0713 | 0.0712 | |
| 15.63 | 0.5380 | 0.4053 | 0.4717 | 0.4005 |
| 31.25 | 0.6768 | 0.6877 | 0.6823 | 0.6111 |
| 62.50 | 1.1630 | 1.2380 | 1.2005 | 1.1293 |
| 125.00 | 2.0080 | 2.1190 | 2.0635 | 1.9923 |
| 250.00 | 3.1820 | 3.3390 | 3.2605 | 3.1893 |
| 500.00 | 4.3384 | 4.2418 | 4.2901 | 4.2189 |
| 1000.00 | 4.4053 | 4.6583 | 4.5318 | 4.4606 |
实验类型
夹心酶联免疫吸附测定(Sandwich Elisa)
种属反应性
Human
检测方法
比色法
实验检测时长
120min
标准曲线范围
15.63 pg/ml -1000 pg/ml
标准曲线梯度
7点/3倍
孵育次数
2
可检测样本
可溶性物质的液相样品。例如:血清,血浆,细胞培养上清,组织研磨液等。
加样体积
50 μl
产品特性
- 优化的捕获和检测抗体配对与推荐浓度可节省较长的开发时间
- 提供开发方案以指导进一步的分析优化
- 检测可根据您的特定需求进行定制
- 完整试剂盒的经济替代品
试剂盒组分
- 捕获抗体
- 检测抗体
- 重组标准品
- 与辣根过氧化物酶偶联的链霉亲和素 (Streptavidin-HRP)
所需的其他材料
DTSet辅助试剂盒(5板):包含96孔微孔板、封板膜、显色液、终止溶液、包板缓冲液(PBS)、洗涤缓冲液和检测缓冲液。
上面列出的部件可以单独购买:
- 96孔微孔板板(EP): YOUKE Life, Catalog # DSEP01
- 封板木膜(PS): YOUKE Life, Catalog # DSSF01。
- 包板缓冲液(CB): 137mM NaCl,2.7mM KCl,8.1mM Na2HPO4,1.5mM KH2PO4,pH 7.2-7.4,0.2m过滤。YOUKE Life, Catalog # DSCB01。
- 检测缓冲液 10X(AB): 0.5%BSA,0.05%Tween20,PBS溶液。YOUKE Life, Catalog # DSAB01。
- 封闭液(BB): YOUKE Life, Catalog # DSBB01。
- Washing Solution: 0.05%Tween20,PBS溶液,pH 7.2-7.4。YOUKE Life, Catalog # DSWB01。
- 底物显色液(TMB): TMB。YOUKE Life, Catalog # DSTS01。
- 终止溶液(SS): 0.5mol/ml H2SO4。YOUKE Life, Catalog # DSSS01。
靶点
功能
肿瘤坏死因子 (TNF) 是多效性细胞因子,被认为是动物因受伤或感染而产生的炎症和免疫反应的主要修饰因子。已经描述了两种形式的 TNF,称为 TNF-α(或恶病质)和 TNF-β(或淋巴毒素),它们具有 30% 的序列相似性,并竞争与相同的受体结合。TNF 作为宿主对感染和肿瘤形成的抵抗力的介质发挥着必要和有益的作用。然而,这些因子的过量产生或不适当表达可导致各种病理状况,包括消瘦、全身毒性和感染性休克。
TNF 的作用是在因子与细胞表面受体结合后产生的。已经鉴定并克隆了两种不同的 TNF 受体。几乎所有研究的细胞类型都显示存在一种或两种受体类型。一种称为 TNF RII(A 型、a 型、75 kDa 或 utr 抗原)的受体类型显示表观分子量为 75 kDa。该受体的基因编码一个具有 439 个氨基酸 (aa) 残基的推定跨膜蛋白。另一种受体类型称为 TNF RI(B 型、b 型、55 kDa 或 htr 抗原),表观分子量为 55 kDa。该蛋白质的基因编码 426 个 aa 残基的跨膜蛋白。两种受体类型都显示出 TNF-α 或 TNF-β 的高亲和力结合。这两种受体类型在免疫学上是不同的,但它们的细胞外结构域在四个结构域中的半胱氨酸残基位置模式上显示出相似性。两种受体类型的细胞内结构域显然无关,表明两种受体类型可能采用不同的信号转导途径。
几个小组已经在人血清和尿液中鉴定出可溶性 TNF 结合蛋白,它们可以中和 TNF-α 和 TNF-β 的生物活性。已确定并命名为 sTNF RI (或 TNF BPI) 和 sTNF RII (或 TNF BPII)。这些可溶性形式现在已被证明代表上述两种 TNF 受体的截短形式。可溶性受体形式显然是由于受体的细胞外结构域脱落而产生的,在健康受试者的血清和尿液中发现浓度约为 1-2 ng/mL。可溶性受体的水平因人而异,但对于给定的个体来说,随着时间的推移是稳定的。
在孕妇的羊水和尿液中,在与内毒素血症、脑膜球菌血症和 HIV 感染等病理状况相关的血清或血浆中,以及与感染和恶性肿瘤相关的患者的血浆或腹水中发现 TNF 受体水平升高。诱导 TNF 受体脱落的机制尚不清楚。有报道称 TNF 水平升高与可溶性受体水平之间存在相关性,通常表明导致 TNF 水平升高的刺激也会诱导 TNF 受体脱落。然而,也有证据表明,这两种类型的可溶性受体的脱落是独立调节的。2 仅供研究使用。不可用于诊断程序。
可溶性 TNF 受体的生理作用尚不清楚。众所周知,两种类型的可溶性受体都可以在体外与 TNF 结合,并通过与细胞表面受体竞争 TNF 结合来抑制其生物活性。因此,有人提出,响应 TNF 释放而脱落可溶性受体可以作为结合和抑制未立即与表面受体结合的 TNF 的机制,从而保护其他细胞免受 TNF 的影响并定位炎症反应。受体脱落也可能代表一种使因 TNF 影响而脱落受体的细胞脱敏的机制。另一方面,据报道,在低浓度的 TNF 下,与可溶性受体结合可以稳定 TNF 并增强其某些活性。因此,在某些情况下,与可溶性受体结合的 TNF 库可能代表 TNF 稳定和受控释放的储存库。
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