大鼠腸脂肪酸結(jié)合蛋白（I-FABP）酶聯(lián)免疫分析（ELISA）試劑盒應(yīng)用雙抗體夾心法測(cè)定標(biāo)本中大鼠腸脂肪酸結(jié)合蛋白（I-FABP）水平。用純化的大鼠腸脂肪酸結(jié)合蛋白（I-FABP）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腸脂肪酸結(jié)合蛋白（I-FABP），再與HRP標(biāo)記的腸脂肪酸結(jié)合蛋白（I-FABP）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腸脂肪酸結(jié)合蛋白（I-FABP）呈正相關(guān)。用酶標(biāo)儀在450nm波長下測(cè)定吸光度（OD值），通過標(biāo)準(zhǔn)曲線計(jì)算樣品中大鼠腸脂肪酸結(jié)合蛋白（I-FABP）濃度。
試劑盒組成：
| 試劑盒組成 | 48孔配置 | 96孔配置 | 保存 |
| 說明書 | 1份 | 1份 |
|
| 封板膜 | 2片（48） | 2片（96） |
|
| 密封袋 | 1個(gè) | 1個(gè) |
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| 酶標(biāo)包被板 | 1×48 | 1×96 | 2-8℃保存 |
| 標(biāo)準(zhǔn)品：1350 ng/L | 0.5ml×1瓶 | 0.5ml×1瓶 | 2-8℃保存 |
| 標(biāo)準(zhǔn)品稀釋液 | 1.5ml×1瓶 | 1.5ml×1瓶 | 2-8℃保存 |
| 酶標(biāo)試劑 | 3 ml×1瓶 | 6 ml×1瓶 | 2-8℃保存 |
| 樣品稀釋液 | 3 ml×1瓶 | 6 ml×1瓶 | 2-8℃保存 |
| 顯色劑A液 | 3 ml×1瓶 | 6 ml×1瓶 | 2-8℃保存 |
| 顯色劑B液 | 3 ml×1瓶 | 6 ml×1瓶 | 2-8℃保存 |
| 終止液 | 3ml×1瓶 | 6ml×1瓶 | 2-8℃保存 |
| 濃縮洗滌液 | （20ml×20倍）×1瓶 | （20ml×30倍）×1瓶 | 2-8℃保存 |
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)溆谩?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：
標(biāo)準(zhǔn)品的稀釋與加樣：在酶標(biāo)包被板上設(shè)標(biāo)準(zhǔn)品孔10孔，在*、第二孔中分別加標(biāo)準(zhǔn)品100μl，然后在*、第二孔中加標(biāo)準(zhǔn)品稀釋液50μl，混勻；然后從*孔、第二孔中各取100μl分別加到第三孔和第四孔，再在第三、第四孔分別加標(biāo)準(zhǔn)品稀釋液50μl，混勻；然后在第三孔和第四孔中先各取50μl棄掉，再各取50μl分別加到第五、第六孔中，再在第五、第六孔中分別加標(biāo)準(zhǔn)品稀釋液50ul，混勻；混勻后從第五、第六孔中各取50μl分別加到第七、第八孔中，再在第七、第八孔中分別加標(biāo)準(zhǔn)品稀釋液50μl，混勻后從第七、第八孔中分別取50μl加到第九、第十孔中，再在第九第十孔分別加標(biāo)準(zhǔn)品稀釋液50μl，混勻后從第九第十孔中各取50μl棄掉。（稀釋后各孔加樣量都為50μl，濃度分別為900ng/L，600ng/L ，300ng/L， 150ng/L，75ng/L）。
加樣：分別設(shè)空白孔（空白對(duì)照孔不加樣品及酶標(biāo)試劑，其余各步操作相同）、待測(cè)樣品孔。在酶標(biāo)包被板上待測(cè)樣品孔中先加樣品稀釋液40μl，然后再加待測(cè)樣品10μl（樣品zui終稀釋度為5倍）。加樣將樣品加于酶標(biāo)板孔底部，盡量不觸及孔壁，輕輕晃動(dòng)混勻。
溫育：用封板膜封板后置37℃溫育30分鐘。
配液：將30（48T的20倍）倍濃縮洗滌液用蒸餾水30（48T的20倍）倍稀釋后備用。
洗滌：小心揭掉封板膜，棄去液體，甩干，每孔加滿洗滌液，靜置30秒后棄去，如此重復(fù)5次，拍干。
加酶：每孔加入酶標(biāo)試劑50μl，空白孔除外。
溫育：操作同3。
洗滌：操作同5。
顯色：每孔先加入顯色劑A50μl，再加入顯色劑B50μl，輕輕震蕩混勻，37℃避光顯色15分鐘.
終止：每孔加終止液50μl，終止反應(yīng)（此時(shí)藍(lán)色立轉(zhuǎn)黃色）。
測(cè)定：以空白空調(diào)零，450nm波長依序測(cè)量各孔的吸光度（OD值）。 測(cè)定應(yīng)在加終止液后15分鐘以內(nèi)進(jìn)行。
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%
檢測(cè)范圍：
50ng/L -1000ng/L
保存條件及有效期：
1.試劑盒保存：2-8℃
2．有效期：6個(gè)月
FOR RESEARCH USE ONLY
Rat intestinal fatty acid binding protein
Drug Names
Generic Name：Rat intestinal fatty acid binding protein（I-FABP） ELISA Kit.
Purpose
This kit allows for the determination of I-FABP concentrations in Rat serum, blood plasma, and other biological fluids.
Principle of the assay
The kit assay Rat I-FABP level in the sample，use Purified Rat I-FABP to coat microtiter plate wells, make solid-phase antibody, then add I-FABP to wells, Combined I-FABP antibody which With HRP labeled goat anti-mouse 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 I-FABP 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 kit48determinations96 determinationsStorage
User manual11
Closure plate membrane22
Sealed bags11
Microelisa stripplate112-8℃
Standard：1350ng/L0.5ml×1 bottle0.5ml×1 bottle2-8℃
Standard diluent1.5ml×1 bottle1.5ml×1 bottle2-8℃
HRP-Conjugate reagent3ml×1 bottle6ml×1 bottle2-8℃
Sample diluent3ml×1 bottle6ml×1 bottle2-8℃
Chromogen Solution A3ml×1 bottle6ml×1 bottle2-8℃
Chromogen Solution B3ml×1 bottle6ml×1 bottle2-8℃
Stop Solution3ml×1 bottle6ml×1 bottle2-8℃
wash solution（20ml×20 fold）
×1bottle（20ml×30 fold）
×1bottle2-8℃
Specimen requirements
serum- coagulation at room temperature 10-20 mins，centrifugation 20-min at the speed of 2000-3000 r.p.m. remove supernatant, If precipitation appeared, Centrifugal again.
plasma-use suited EDTA or citrate plasma as an anticoagulant,mix 10-20 mins ,centrifugation 20-min at the speed of 2000-3000 r.p.m. remove supernatant, If precipitation appeared, Centrifugal again.
Urine-collect sue a sterile container, centrifugation 20-min at the speed of 2000-3000 r.p.m. remove supernatant, If precipitation appeared, Centrifugal again. The Operation of Hydrothorax and cerebrospinal fluid Reference to it.
cell culture supernatant-detect secretory components, collect sue a sterile container, centrifugation 20-min at the speed of 2000-3000 r.p.m. remove supernatant,detect the composition of cells, Dilut cell suspension with PBS（PH7.2-7.4）, Cell concentration reached 1 million / ml, repeated freeze-thaw cycles, damage cells and release of intracellular components, centrifugation 20-min at the speed of 2000-3000 r.p.m. remove supernatant, If precipitation appeared, Centrifugal again.
Tissue samples- After cutting samples, check the weight,add PBS（PH7.2-7.4）, Rapidly frozen with liquid nitrogen, maintain samples at 2-8℃ after melting,add PBS（PH7.4）, Homogenized by hand or Grinders, centrifugation 20-min at the speed of 2000-3000 r.p.m. remove supernatant.
extract as soon as possible after Specimen collection,and according to the relevant literature, and should be experiment as soon as possible after the extraction. If it can’t, specimen can be kept in -20 ℃ to preserve, Avoid repeated freeze-thaw cycles.
Can’t detect the sample which contain NaN3, because NaN3 inhibits HRP active.
Assay procedure
1.Dilute and add sample to Standard: set 10 Standard wells on the ELISA plates coated, add Standard 100μl to the first and the second well, then add Standard dilution 50μl to the first and the second well, mix; take out 100μl form the first and the second well then add it to the third and the forth well separay. then add Standard dilution 50μl to the third and the forth well ,mix ; then take out 50μl from the third and the forth well discard, add 50μl to the fifth and the sixth well ,then add Standard dilution 50μl to the fifth and the sixth well, mix ; take out 50μl from the fifth and the sixth well and add to the seventh and the eighth well, then add Standard dilution 50μl to the seventh and the eighth well ,mix ; take out 50μl from the seventh and the eighth well and add to the ninth and the tenth well, add Standard dilution 50μl to the ninth and the tenth well, mix , take out 50μl from the ninth and the tenth well discard（add Sample 50μl to each well after Diluting ,（density: 900 ng/L,600 ng/L,300 ng/L,150 ng/L, 75 ng/L）
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 40μl 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.
Assay range
50ng/L-1000ng/L
Storage and validity
1．Storage： 2-8℃.
2．validity： six months.
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