小鼠β淀粉樣蛋白 1-42（Aβ1-42）ELISA 檢測試劑盒

點擊次數(shù)：799 發(fā)布時間：2019/7/18 14:19:53

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· 上傳時間：2019/7/18 14:19:53

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· 資料簡介： 本試劑盒只能用于科學(xué)研究，不得用于醫(yī)學(xué)診斷

小鼠β淀粉樣蛋白 1-42（Aβ1-42）ELISA 檢測試劑盒

使用說明書

檢測原理

試劑盒采用雙抗體夾心法酶聯(lián)免疫吸附試驗（ELISA）。往預(yù)先包被小鼠β淀粉樣蛋白1-42（Aβ1-42）捕獲抗體的包被微孔中，依次加入標(biāo)本、標(biāo)準(zhǔn)品、HRP標(biāo)記的檢測抗體，經(jīng)過溫育并徹底洗滌。用底物TMB顯色，TMB在過氧化物酶的催化下轉(zhuǎn)化成藍(lán)色，并在酸的作用下轉(zhuǎn)化成*終的黃色。顏色的深淺和樣品中的小鼠β淀粉樣蛋白1-42（Aβ1-42）呈正相關(guān)。用酶標(biāo)儀在450nm 波長下測定吸光度（OD 值），計算樣品濃度。

樣品收集、處理及保存方法

1. 血清：使用不含熱原和內(nèi)毒素的試管，操作過程中避免任何細(xì)胞刺激，收集血液后，3000 轉(zhuǎn)離心 10 分鐘將血清和紅細(xì)胞迅速小心地分離。

2. 血漿：EDTA、檸檬酸鹽或肝素抗凝。3000 轉(zhuǎn)離心 30 分鐘取上清。

3. 細(xì)胞上清液：3000 轉(zhuǎn)離心 10 分鐘去除顆粒和聚合物。

4. 組織勻漿：將組織加入適量生理鹽水搗碎。3000 轉(zhuǎn)離心 10 分鐘取上清。

5. 保存：如果樣本收集后不及時檢測，請按一次用量分裝，凍存于-20℃，避免反復(fù)凍融，在室溫下解凍并確保樣品均勻地充分解凍。

自備物品

1. 酶標(biāo)儀（450nm）

2. 高精度加樣器及槍頭：0.5-10uL、2-20uL、20-200uL、200-1000uL

3. 37℃恒溫箱

操作注意事項

1. 試劑盒保存在 2-8℃，使用前室溫平衡 20 分鐘。從冰箱取出的濃縮洗滌液會有結(jié)晶，這屬于正�，F(xiàn)象，水浴加熱使結(jié)晶完全溶解后再使用。

2. 實驗中不用的板條應(yīng)立即放回自封袋中，密封（低溫干燥）保存。

3. 預(yù)處理后的樣本無需稀釋，直接取 10μL 加樣即可。

4. 嚴(yán)格按照說明書中標(biāo)明的時間、加液量及順序進行溫育操作。

5. 所有液體組分使用前充分搖勻。

試劑盒組成

名稱 96 孔配置 48 孔配置備注

微孔酶標(biāo)板 12 孔×8 條 12 孔×4 條無

標(biāo)準(zhǔn)品 0.3mL 0.3mL 無

樣本稀釋液 6mL 3mL 無

檢測抗體-HRP 10mL 5mL 無

20×洗滌緩沖液 25mL 15mL 按說明書進行稀釋底物 A 6mL 3mL 無

底物 B 6mL 3mL 無

終止液 6mL 3mL 無

封板膜 2 張 2 張無

說明書 1 份 1 份無

自封袋 1 個 1 個無

注：標(biāo)準(zhǔn)品濃度依次為：40、20、10、5、2.5、0 ng/mL.

試劑的準(zhǔn)備

20×洗滌緩沖液的稀釋：蒸餾水按 1：20 稀釋，即 1 份的 20×洗滌

緩沖液加 19 份的蒸餾水。

洗板方法

1. 手工洗板：甩盡孔內(nèi)液體，每孔加滿洗滌液，靜置 1min 后甩盡孔內(nèi)液體，在吸水紙上拍干，如此洗板 5 次。

2. 自動洗板機：每孔注入洗液 350μL，浸泡 1min，洗板 5 次。

操作步驟

1. 從室溫平衡 20min 后的鋁箔袋中取出所需板條，剩余板條用自封袋密封放回 4℃。

2. 設(shè)置標(biāo)準(zhǔn)品孔和樣本孔，標(biāo)準(zhǔn)品孔各加不同濃度的標(biāo)準(zhǔn)品 50μL；

3. 待測樣本孔先加待測樣本 10μL，再加樣本稀釋液 40μL；

4. 隨后標(biāo)準(zhǔn)品孔和樣本孔中每孔加入辣根過氧化物酶（HRP）標(biāo)記的檢測抗體 100μL，用封板膜封住反應(yīng)孔，37℃水浴鍋或恒溫箱溫育 60min。

5. 棄去液體，吸水紙上拍干，每孔加滿洗滌液，靜置 1min，甩去洗滌液，吸水紙上拍干，如此重復(fù)洗板 5 次（也可用洗板機洗板）。

6. 每孔加入底物 A、B 各 50μL，37℃避光孵育 15min。

7. 每孔加入終止液 50μL，15min 內(nèi)，在 450nm 波長處測定各孔的OD 值。

結(jié)果判斷

繪制標(biāo)準(zhǔn)曲線：在 Excel 工作表中，以標(biāo)準(zhǔn)品濃度作橫坐標(biāo)，對應(yīng)OD 值作縱坐標(biāo)，繪制出標(biāo)準(zhǔn)品線性回歸曲線，按曲線方程計算各樣本濃度值。

試劑盒性能

1. 準(zhǔn)確性：標(biāo)準(zhǔn)品線性回歸與預(yù)期濃度相關(guān)系數(shù) R 值，大于等于0.9900。

2. 靈敏度：檢測濃度小于 0.1 ng/mL。

3. 特異性：不與其它可溶性結(jié)構(gòu)類似物交叉反應(yīng)。

4. 重復(fù)性：板內(nèi)變異系數(shù)小于 10%、板間變異系數(shù)小于 15%。

5. 貯藏：2-8℃，避光防潮保存。

6. 有效期：6 個月

免責(zé)聲明

1. 試劑盒僅供研究使用，不得用于臨床實驗或人體實驗，否則所產(chǎn)生的一切后果，由實驗者承擔(dān)，本公司概不負(fù)責(zé)。

2. 嚴(yán)格按照說明書操作，實驗者違反說明書操作，后果由實驗者

承擔(dān)。FOR RESEARCH USE ONLY.

NOT FOR USE IN DIAGNOSTIC PROCEDURES.Mouse amyloid beta peptide 1-42 (Aβ1-42) ELISA Kit instruction Intended use

This Aβ1-42 ELISA kit is intended Laboratory for Research use only ａnd is not for use in diagnostic or therapeutic procedures. The Stop Solution changes the color from blue to yellow ａnd the intensity of the color is measured at 450 nm using a spectrophotometer. In order to measure the concentration of Aβ1-42 in the sample, this Aβ1-42 ELISA Kit includes a set of calibration standards. The calibration standards are assayed at the same time as the samples ａnd allow the operator to produce a standard curve of Optical Density versus Aβ1-42 concentration. The concentration of Aβ1-42 in the samples is then determined by comparing the O.D. of the samples to the standard curve.

Sample collection ａnd storages

Serum - Use a serum separator tube ａnd allow samples to clot for 30 minutes

before centrifugation for 10 minutes at approximately 3000×g. Remove serum ａnd assay immediately or aliquot ａnd store samples at -20℃ or -80℃.Avoid repeated freeze-thaw cycles

Plasma - Collect plasma using EDTA or heparin as an anticoagulant. Centrifuge samples for 30 minutes at 3000×g at 2-8℃ within 30 minutes of collection. Store samples at -20℃or -80℃. Avoid repeated freeze-thaw cycles.

Cell culture supernates ａnd other biological fluids - Remove particulates

by centrifugation ａnd assay immediately or aliquot ａnd store samples at -20℃or -80℃. Avoid repeated freeze-thaw cycles.

Note: The samples should be centrifugated adequately ａnd no hemolysis

or granule was allowed.

Materials required but not supplied

1. Standard microplate reader(450nm)

2. Precision pipettes ａnd Disposable pipette tips.

3. 37 ℃ incubator

Precautions

1. Do not substitute reagents from one kit to another. Standard, conjugate ａnd microplates are matched for optimal performance. Use only the reagents supplied by manufacturer.

2. Do not remove microplate from the storage bag until needed. Unused stripsshould be stored at 2-8°C in their pouch with the desiccant provided.

3. Mix all reagents before using. Remove all kit reagents from refrigerator ａnd allow them to reach room temperature ( 20-25°C)

Materials supplied

Name 96 determinations 48 determinations

Microelisa stripplate 12*8strips 12*4strips

Standard 0.3ml 0.3ml

Sample diluent 6.0ml 3.0ml

HRP-Conjugate reagent 10.0ml 5.0ml

20X Wash solution 25ml 15ml

Chromogen Solution A 6.0ml 3.0ml

Chromogen Solution B 6.0ml 3.0ml

Stop Solution 6.0ml 3.0ml

Closure plate membrane 2 2

User manual 1 1

Sealed bags 1 1

Note: Standard concentration was followed by:

40、20、10、5、2.5、0 ng/mL.

Reagent preparation

20×wash solution:Dilute with Distilled or deionized water 1:20.

Assay procedure

1. Prepare all r e a g e n ts before starting assay procedure. It is recommended that all Standards ａnd Samples be added in duplicate to the Microelisa Stripplate.

2. Add standard: Set Standard wells, testing sample wells. Add standard 50μl to standard well.

3. Add Sample: Add testing sample 10μl Then add sample diluent 40μl to testing sample well; Blank well doesn’t add anyting.

4. Add 100μl of HRP-conjugate reagent to each well, cover with an adhesive strip ａnd incubate for 60 minutes at 37°C.

5. Aspirate each well ａnd wash, repeating the process four times for a total of five washes. Wash by filling each well with Wash Solution (400μl) using a squirt bottle, manifold dispenser or autowasher. Complete removal of liquid at each step is essential to good performance. After the last wash, remove any remaining Wash Solution by aspirating or decanting. Invert the plate ａnd blot it against clean paper towels.

6. Add chromogen solution A 50μl ａnd chromogen solution B 50μl to each well. Gently mix ａnd incubate for 15 minutes at 37°C. Protect from light.

7. Add 50μl Stop Solution to each well. The color in the wells should change from blue to yellow. If the color in the wells is green or the color change does not appear uniform, gently tap the plate to ensure thorough mixing.8. Read the Optical Density (O.D.) at 450 nm using a microtiter plate reader within 15 minutes.

Calculation of results

1. This standard curve is used to determine the amount in an unknown sample. The standard curve is generated by plotting the average O.D. (450 nm)

obtained for each of the six standard concentrations on the vertical (Y) axis versus the corresponding concentration on the horizontal (X) axis.

2. First, calculate the mean O.D. value for each standard ａnd sample. All O.D. values, are subtracted by the mean value of the zero standard before result interpretation. Construct the standard curve using graph paper or statistical software.

3. To determine the amount in each sample, first locate the O.D. value on the Y-axis ａnd extend a horizontal line to the standard curve. At the point of intersection, draw a vertical line to the X-axis ａnd read the corresponding concentration.

4. Any variation in operator, pipetting ａnd washing technique, incubation time or temperature, ａnd kit age can cause variation in result. Each user should obtain their own standard curve.

5. The sensitivity by this assay is 0.1 ng/mL.

6. Standard curve

Storage： 2-8℃.

validity： six months.

FOR RESEARCH USE ONLY; NOT FOR THERAPEUTIC OR

DIAGNOSTIC APPLICATIONS! PLEASE READ THROUGH

ENTIRE PROCEDURE BEFORE BEGINNING!

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