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兔腫瘤壞死因子α(TNF-α)酶聯(lián)免疫分析(ELISA)
試劑盒使用說明書
本試劑僅供研究使用
目的:本試劑盒用于測(cè)定兔血清,血漿及相關(guān)液體樣本中腫瘤壞死因子α(TNF-α)的含量。
實(shí)驗(yàn)原理:
本試劑盒應(yīng)用雙抗體夾心法測(cè)定標(biāo)本中兔腫瘤壞死因子α(TNF-α)水平。用純化的兔腫瘤壞死因子α(TNF-α)抗體包被微孔板,制成固相抗體,往包被單抗的微孔中依次加入腫瘤壞死因子α,再與HRP標(biāo)記的羊抗兔抗體結(jié)合,形成抗體-抗原-酶標(biāo)抗體復(fù)合物,經(jīng)過*洗滌后加底物TMB顯色。TMB在HRP酶的催化下轉(zhuǎn)化成藍(lán)色,并在酸的作用下轉(zhuǎn)化成zui終的黃色。顏色的深淺和樣品中的兔腫瘤壞死因子α呈正相關(guān)。用酶標(biāo)儀在450nm波長(zhǎng)下測(cè)定吸光度(OD值),通過標(biāo)準(zhǔn)曲線計(jì)算樣品中兔腫瘤壞死因子α(TNF-α)濃度。
樣本處理及要求:
1. 血清:室溫血液自然凝固10-20分鐘,離心20分鐘左右(2000-3000轉(zhuǎn)/分)。仔細(xì)收集上清,保存過程中如出現(xiàn)沉淀,應(yīng)再次離心。
2. 血漿:應(yīng)根據(jù)標(biāo)本的要求選擇EDTA或檸檬酸鈉作為抗凝劑,混合10-20分鐘后,離心20分鐘左右(2000-3000轉(zhuǎn)/分)。仔細(xì)收集上清,保存過程中如有沉淀形成,應(yīng)該再次離心。
3. 尿液:用無菌管收集,離心20分鐘左右(2000-3000轉(zhuǎn)/分)。仔細(xì)收集上清,保存過程中如有沉淀形成,應(yīng)再次離心。胸腹水、腦脊液參照實(shí)行。
4. 細(xì)胞培養(yǎng)上清:檢測(cè)分泌性的成份時(shí),用無菌管收集。離心20分鐘左右(2000-3000轉(zhuǎn)/分)。仔細(xì)收集上清。檢測(cè)細(xì)胞內(nèi)的成份時(shí),用PBS(PH7.2-7.4)稀釋細(xì)胞懸液,細(xì)胞濃度達(dá)到100萬/ml左右。通過反復(fù)凍融,以使細(xì)胞破壞并放出細(xì)胞內(nèi)成份。離心20分鐘左右(2000-3000轉(zhuǎn)/分)。仔細(xì)收集上清。保存過程中如有沉淀形成,應(yīng)再次離心。
5. 組織標(biāo)本:切割標(biāo)本后,稱取重量。加入一定量的PBS,PH7.4。用液氮迅速冷凍保存?zhèn)溆?。?biāo)本融化后仍然保持2-8℃的溫度。加入一定量的PBS(PH7.4),用手工或勻漿器將標(biāo)本勻漿充分。離心20分鐘左右(2000-3000轉(zhuǎn)/分)。仔細(xì)收集上清。分裝后一份待檢測(cè),其余冷凍備用。
6. 標(biāo)本采集后盡早進(jìn)行提取,提取按相關(guān)文獻(xiàn)進(jìn)行,提取后應(yīng)盡快進(jìn)行實(shí)驗(yàn)。若不能馬上進(jìn)行試驗(yàn),可將標(biāo)本放于-20℃保存,但應(yīng)避免反復(fù)凍融.
7. 不能檢測(cè)含NaN3的樣品,因NaN3抑制辣根過氧化物酶的(HRP)活性。
操作步驟
注意事項(xiàng):
計(jì)算:
以標(biāo)準(zhǔn)物的濃度為橫坐標(biāo),OD值為縱坐標(biāo),
在坐標(biāo)紙上繪出標(biāo)準(zhǔn)曲線,根據(jù)樣品的OD
值由標(biāo)準(zhǔn)曲線查出相應(yīng)的濃度;再乘以稀釋
倍數(shù);或用標(biāo)準(zhǔn)物的濃度與OD值計(jì)算出標(biāo)
準(zhǔn)曲線的直線回歸方程式,將樣品的OD值
代入方程式,計(jì)算出樣品濃度,再乘以稀釋
倍數(shù),即為樣品的實(shí)際濃度。
試劑盒性能:
1.樣品線性回歸與預(yù)期濃度相關(guān)系數(shù)R值為0.95以上。
2.批內(nèi)與批見應(yīng)分別小于9%和11%
保存條件及有效期:
1.試劑盒保存:2-8℃。
2.有效期:6個(gè)月
Rabbit Tumor necrosis factor α
FOR RESEARCH USE ONLY |
Drug Names
Generic Name:Rabbit Tumor necrosis factor α(TNF-α) ELISA Kit.
Purpose
This kit allows for the determination of TNF-α concentrations in Rabbit serum, blood plasma, and other biological fluids.
Principle of the assay
The kit assay Rabbit TNF-α level in the sample,use Purified Rabbit TNF-α antibody to coat microtiter plate wells, make solid-phase antibody, then add TNF-α to wells, Combined antibody which With HRP labeled goat anti-rabbit become antibody - antigen - enzyme-antibody complex, after washing Compley, Add TMB substrate solution,TMB substrate becomes blue color At HRP enzyme-catalyzed, reaction is terminated by the addition of a sulphuric acid solution and the color change is measured spectrophotometrically at a wavelength of 450 nm. The concentration of TNF-α in the samples is then determined by comparing the O.D. of the samples to the standard curve.
Materials provided with the kit
Materials provided with the kit | 48determinations | 96 determinations | Storage |
User manual | 1 | 1 | |
Closure plate membrane | 2 | 2 | |
Sealed bags | 1 | 1 | |
Microelisa stripplate | 1 | 1 | 2-8℃ |
Standard:22.5ng/L | 0.5ml×1 bottle | 0.5ml×1 bottle | 2-8℃ |
Standard diluent | 1.5ml×1 bottle | 1.5ml×1 bottle | 2-8℃ |
HRP-Conjugate reagent | 3ml×1 bottle | 6ml×1 bottle | 2-8℃ |
Sample diluent | 3ml×1 bottle | 6ml×1 bottle | 2-8℃ |
Chromogen Solution A | 3ml×1 bottle | 6ml×1 bottle | 2-8℃ |
Chromogen Solution B | 3ml×1 bottle | 6ml×1 bottle | 2-8℃ |
Stop Solution | 3ml×1 bottle | 6ml×1 bottle | 2-8℃ |
wash solution | (20ml×20 fold) ×1bottle | (20ml×30 fold) ×1bottle | 2-8℃ |
Specimen requirements
Assay procedure
1.Dilute and add sample to Standard
2.add sample:Set blank wells separay (blank comparison wells don’t add sample and HRP-Conjugate reagent, other each step operation is same). testing sample well. add Sample dilution 50μl to testing sample well, then add testing sample 10μl (sample final dilution is 5-fold), add sample to wells , don’t touch the well wall as far as possible, and Gently mix.
3.Incubate: After closing plate with Closure plate membrane ,incubate for 30 min at 37℃.
4.Configurate liquid: 30-fold (or 20-fold)wash solution diluted 30-fold (or 20-fold) with distilled water and reserve.
5.washing:Uncover Closure plate membrane, discard Liquid, dry by swing, add washing buffer to every well, still for 30s then drain, repeat 5 times, dry by pat.
6.add enzyme:Add HRP-Conjugate reagent 50μl to each well, except blank well.
7.incubate:Operation with 3.
8.washing:Operation with 5.
9.color:Add Chromogen Solution A 50ul and Chromogen Solution B to each well, evade the light preservation for 15 min at 37℃
10.Stop the reaction:Add Stop Solution50μl to each well, Stop the reaction(the blue color change to yellow color).
11.assay:take blank well as zero , Read absorbance at 450nm after Adding Stop Solution and within 15min.
Important notes
Storage and validity
1.Storage: 2-8℃.
2.validity: six months.