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人載脂蛋白 E 定量分析酶聯(lián)免疫檢測(cè)試劑盒

本試劑盒僅供科研使用。用于體外定量檢測(cè)人血清、血漿或細(xì)胞培養(yǎng)上清液中的載脂蛋白 E 濃度。使用前請(qǐng)仔細(xì)閱讀說(shuō)明書并檢查試

劑組分是否完整。如有產(chǎn)品包裝破損或質(zhì)量投拆，請(qǐng)?jiān)谑盏截浺粋€(gè)月之內(nèi)聯(lián)系我們。

載脂蛋白 E 簡(jiǎn)介：

載脂蛋白 E，是一個(gè)低密度脂蛋白，極低密度脂蛋白，高密度脂蛋白及乳糜的基本構(gòu)成蛋白，是一個(gè)糖蛋白。成熟的載脂蛋白 E 的分

子量為 34 千道爾頓。主要由肝細(xì)胞，巨噬細(xì)胞及神經(jīng)系統(tǒng)中非神經(jīng)細(xì)胞產(chǎn)生。

載脂蛋白 E 能夠抑制 TNF-α ，Toll 樣受體 3 和 Toll 樣受體 4 介導(dǎo)的炎癥反應(yīng)，刺激和調(diào)整 T 細(xì)胞及增強(qiáng) M2 型巨噬細(xì)胞的抑制炎癥作

用。載脂蛋白 E 在淀粉類代謝中起重要作用，在阿爾茨默氏病的發(fā)生中起重要作用。

檢測(cè)原理:

本試劑盒采用雙抗體夾心ELISA法檢測(cè)樣本中載脂蛋白E的濃度。載脂蛋白E捕獲抗體已預(yù)包被于酶標(biāo)板上，當(dāng)加入標(biāo)本或參考品時(shí)，

其中的載脂蛋白E會(huì)與捕獲抗體結(jié)合，其它游離的成分通過洗滌的過程被除去。當(dāng)加入生物素化的抗人載脂蛋白E抗體后，抗人載脂蛋白E

抗體與載脂蛋白E接合，形成夾心的免疫復(fù)合物，其它游離的成分通過洗滌的過程被除去。隨后加入辣根過氧化物酶標(biāo)記的親合素。生物素

與親合素特異性結(jié)合，親合素連接的酶就會(huì)與夾心的免疫復(fù)合物連接起來(lái)；其它游離的成分通過洗滌的過程被除去。最后加入顯色劑，若

樣本中存在載脂蛋白E將會(huì)形成免疫復(fù)合物，辣根過氧化物酶會(huì)催化無(wú)色的顯色劑氧化成藍(lán)色物質(zhì)，在加入終止液后呈黃色。通過酶標(biāo)儀檢

測(cè)，讀其450nm處的OD值，載脂蛋白E濃度與OD450值之間呈正比，通過參考品繪制標(biāo)準(zhǔn)曲線，對(duì)照未知樣本中OD值，即可算出標(biāo)本中載脂蛋

白E濃度。

人載脂蛋白E定量分析酶聯(lián)免疫檢測(cè)試劑盒組成:

組分 規(guī)格（96T/48T）

人載脂蛋白E預(yù)包被板 12條/6條

5×標(biāo)準(zhǔn)品稀釋液 20ml/10ml

人載脂蛋白E標(biāo)準(zhǔn)品 2/1支(凍干)

人載脂蛋白E生物素化抗體 10ml/5ml

親和素連接的HRP酶 10ml/5ml

濃縮洗滌液 20× 30ml/15ml

TMB底物 10ml/5ml

中止液 5ml/3ml

封板膠紙 3/2張

說(shuō)明書 1份

標(biāo)本收集:

1.標(biāo)本的收集請(qǐng)按下列流程進(jìn)行操作；

A.細(xì)胞上清標(biāo)本離心去除懸浮物后即可；

B.血清標(biāo)本應(yīng)是自然凝固后，取上清，避免在冰箱中凝固血液；

C.血漿標(biāo)本，推薦用EDTA的方法收集；

D.若待測(cè)樣本不能及時(shí)檢測(cè)，標(biāo)本收集后請(qǐng)分裝，凍存于－20℃，避免反復(fù)凍融。

2.血清標(biāo)本不應(yīng)添加任何防腐劑或抗凝劑；

3.標(biāo)本應(yīng)清澈透明，檢測(cè)前樣本中如有懸浮物應(yīng)通過離心去除。

4.請(qǐng)勿使用溶血，高血脂或污染的標(biāo)本檢測(cè)，否則結(jié)果將不準(zhǔn)確。

注意事項(xiàng):

1.試劑盒請(qǐng)保存在2～8℃。

2.濃縮洗滌液因在低溫下可能有結(jié)晶，請(qǐng)水浴加熱使結(jié)晶完全溶解后再配制工作液。3.標(biāo)準(zhǔn)品復(fù)溶加樣后，剩余部份請(qǐng)丟棄。

4.底物請(qǐng)勿接觸氧化劑和金屬。

5.加樣時(shí)，請(qǐng)及時(shí)更換槍頭，避免交叉污染。

6.嚴(yán)禁混用不同批號(hào)的試劑盒組份。

7.充分混勻?qū)ΡＷC反應(yīng)結(jié)果的準(zhǔn)性很重要，在加液后請(qǐng)輕輕叩擊邊緣以保證混勻。

8.室溫反應(yīng)，請(qǐng)嚴(yán)格控制在25-28℃。

9.洗滌過程是至關(guān)重要的，洗滌不充分會(huì)使精確度下降并導(dǎo)致結(jié)果誤差較大。

10.試驗(yàn)中標(biāo)準(zhǔn)品和樣本檢測(cè)時(shí)建議作雙復(fù)孔。

11.加樣過程中避免氣泡的產(chǎn)生。

12.血清和血漿標(biāo)本的檢測(cè)時(shí)，檢測(cè)抗體的孵育時(shí)間應(yīng)適當(dāng)延長(zhǎng)

檢測(cè)前準(zhǔn)備工作:

1.試劑盒自冰箱中取出后應(yīng)置室溫（25-28℃）平衡20分鐘；每次檢測(cè)后剩余試劑請(qǐng)及時(shí)于2～8℃保存。

2.將濃縮洗滌液用雙蒸水或去離子水稀釋(1份加19份水)。

3.如有5X標(biāo)準(zhǔn)品稀釋液，請(qǐng)按所需量用雙蒸水或去離子水稀釋(1份加4水)。

4.標(biāo)準(zhǔn)品: 按標(biāo)簽復(fù)溶體積加入標(biāo)準(zhǔn)品稀釋液復(fù)溶使載脂蛋白E終濃度達(dá)到4000pg/ml，室溫反應(yīng)，請(qǐng)嚴(yán)格控制在25～28℃，靜置15~20分鐘

后輕輕混懸（建議抽吸幾次）待徹底溶解，用標(biāo)準(zhǔn)品稀釋液倍比梯度稀釋后依次加入檢測(cè)孔中。（標(biāo)準(zhǔn)曲線取七個(gè)點(diǎn)，最高濃度為4000 pg/ml,

標(biāo)準(zhǔn)品稀釋液直接加入作為0濃度.）

洗滌方法:

自動(dòng)洗板機(jī)或人工洗板：每孔洗滌液為300ul，注入與吸出間隔15-30秒。洗板5次。最后一次洗板完成后將板倒扣著在厚吸水紙上用力拍干。

實(shí)驗(yàn)過程需自備的材料：

1.不同規(guī)格的加樣槍及相應(yīng)的槍頭；

2.酶標(biāo)儀；

3.自動(dòng)洗板機(jī)；

4.去離子水或雙蒸水；

操作步驟:

1.通過計(jì)算并確定一次性實(shí)驗(yàn)所需的板條數(shù)，取出所需板條放置在框架內(nèi)，暫時(shí)用不到板條請(qǐng)放回鋁箔袋密封，保存于4℃。

2.建議設(shè)置本底較正孔，即空白孔,設(shè)置方法為該孔只加TMB顯色液和中止液。每次實(shí)驗(yàn)均需做標(biāo)準(zhǔn)品對(duì)照并畫出標(biāo)準(zhǔn)曲線。

3.分別將標(biāo)本或不同濃度標(biāo)準(zhǔn)品(100ul/孔)加入相應(yīng)孔中，用封板膠紙封住反應(yīng)孔，室溫（25-28℃）孵育120分鐘。血清血漿，1500~6000

倍稀釋，如無(wú)明確范圍，可從3000倍開始。尿樣無(wú)需稀釋，細(xì)胞上清，1~15倍稀釋，可從2倍開始。

4.洗板5次，且最后一次置厚吸水紙上拍干。

5.加入生物素化抗體工作液(100ul/孔)。用封板膠紙封住反應(yīng)孔，室溫（25-28℃）孵育60分鐘。

6.洗板5次，且最后一次置厚吸水紙上拍干。

7.加入親和素連接的HRP酶工作液(100ul/孔)。用封板膠紙封住反應(yīng)孔，避光室溫（25-28℃）孵育20分鐘。

8.洗板5次，且最后一次置厚吸水紙上拍干。

9.加入顯色劑TMB100ul/孔，避光室溫（25-28℃）孵育20分鐘。

10.加入中止液50ul/孔,混勻后即刻測(cè)量OD450值。

結(jié)果判斷:

1.復(fù)孔的值在20%的差異范圍內(nèi)結(jié)果才有效，復(fù)孔的值平均后可作為測(cè)量值。

2.每個(gè)標(biāo)準(zhǔn)品或標(biāo)本的OD值應(yīng)減去本底校正孔的OD值。

上海傳秋生物科技有限公司 424100.com.cn人的載脂蛋白E參考標(biāo)準(zhǔn)曲線

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上海傳秋生物科技有限公司 424100.com.cn

3.手工繪制標(biāo)準(zhǔn)曲線。以標(biāo)準(zhǔn)品濃度作橫坐標(biāo)，OD值作縱坐標(biāo)，以平滑線連接各標(biāo)準(zhǔn)品的坐標(biāo)點(diǎn)。通過標(biāo)本的OD值可在標(biāo)準(zhǔn)曲線上查出其

濃度。

4.若標(biāo)本OD值高于標(biāo)準(zhǔn)曲線上限，應(yīng)適當(dāng)稀釋后重測(cè)，計(jì)算濃度時(shí)應(yīng)乘以稀釋倍數(shù)。

典型數(shù)值和參考曲線

濃度pg/ml 典型OD值1 典型OD值2 OD平均值

0 0.097 0.109 0.103

125 0.186 0.202 0.194

250 0.287 0.303 0.295

500 0.512 0.56 0.536

1000 0.858 0.89 0.874

2000 1.623 1.707 1.665

4000 2.941 3.085 3.013

人載脂蛋白E參考標(biāo)準(zhǔn)曲線

靈敏度，特異性和重復(fù)性:

1.靈敏度：多次重復(fù)結(jié)果表明，最小檢出量為79.6pg/ml。

2.特異性：與人的ApoA1 、ApoA2 、ApoB 、ApoB100 、ApoC1 、ApoC2 、ApoD等沒有交叉反應(yīng)。

3.重復(fù)性：板內(nèi)，板間變異系數(shù)均<10%.

參考文獻(xiàn):

1. Mullick, A.E. et al. (2007) Arterioscler. Throm. Vasc. Biol. 27:339

2. Perugini, M.A. et al. (2000) J. Biol. Chem. 275:36758.

3. Krimbou, L. et al. (2004) J. Lipid. Res. 45:839.

4. Baitsch, D. et al. (2011) Arterioscler. Throm. Vasc. Biol. 31:1160.

5. Jones, P.B. et al. (2011) PLoS ONE 6:e14586.

6. Chroni, A. et al. (2005) Biochemistry 44:13132.上海傳秋生物科技有限公司 424100.com.cn

ELISA Kit for the Quantitative

Analysis of Human Apolipoprotein E

The human Apolipoprotein E ELISA (enzyme-linked immunosorbent assay) kit is used for detection of human Apolipoprotein E in cell

culture supernatants,human serum and plasma.THE ELISA KIT IS FOR RESEARCH USE ONLY. Please read this instruction manual

carefully and check out the material provided before use, and you can contact with our company if any questions. You can enter our

website or call us for other aim.

Introduction

ApoE, a glycoprotein, is a structural component of serum LDL, VLDL, HDL, and chylomicrons. Mature human ApoE is a 34 kDa

protein. It is produced predominantly by hepatocytes, macrophages, and non-neuronal cells in the central nervous system.

ApoE suppresses TNF-α , TLR3, and TLR4 mediated inflammation and promotes the development of regulatory T cells and

anti-inflammatory M2 macrophages. ApoE also plays a critical role in amyloid metabolism and the development of Alzheimer’s disease.

Principles of the Test

The kits is a solid sandwich enzyme-linked immunosorbent assay for detection of human Apolipoprotein E. An anti-human

Apolipoprotein E monoclonal antibody has been absorbed onto the wells of the microtiter strips provided. Samples including specimens

or standards were pipetted into wells. The human Apolipoprotein E in specimens or standards would be captured by the coated antibody

and the free others were removed by washing. The human Apolipoprotein E biotin-conjugated antibody were added and binds to human

Apolipoprotein E captured by the first antibody, which formed a sandwich. Streptavidin-HRP would be added and binds to the biotin

conjugated antibody, then free Streptavidin-HRP would be removed during a wash step. After this, subtrate solution would be added and

catalyzed by the HRP, and a coloured product is formed. The intensity of the colored product is used to calculate in proportion to the

amount of human Apolipoprotein E in the original specimen.

Materials provided with the kits:

Reagent 96/48Test Kit

Human Apolipoprotein E

Antibody-Coated Wells

12 strips/6 strips

5×Standard Diluent 20ml/10ml

Human Apolipoprotein E Standard 2/1vial(s)

Human Apolipoprotein E Detetion

Antibody

10ml/5ml

Streptavidin-HRP 10ml/5ml

Wash Buffer Concentrate 20× 30ml/15ml

TMB 10ml/5ml

Stop Solution 5ml/3ml

Plate Covers 3/2

Complete Instruction Manual 1

Specimen Collection

1.Collecting specimen as following:

A.The particulate of the cell culture supernatants should be removed before use.

B.Serum was obtained from clot at room temperature.

C.Please collect plasma with EDTA.

D.Assay immediately or store samples at -20℃. Avoid free-thaw cycles.

2. Antiseptic and anticoagulant should not appear in Serum samples.

3. Any particulate should be removed from samples before use.4. Do not use grossly hemolyzed or lipemic samples.

Note: Strongly recommend that the serum and plasma samples should be diluent as doubling dilution before use.

Precautions for use:

1.Please storage the Kit at 2～8℃。

2. Washing buffer concentrate may have crystal in low temperature, and you can melt its in water-bath before use.

3. Please discard the remains after use of the dissolved standard.

4.Avoid contact of substrate solution with oxidizing agents and metal.

5.Usage of disposable pipette tips avoid microbial contamination or cross-contamination of reagents or specimens.

6. Do not mix or substitute reagents with those from other lots or other sources.

7.To ensure the adequate mixure of added reagents, please tap gently the plate after the wells were filled with liquid.

8. Incubation temperature should be 25～28℃.

9. Wash step was crucial for whole assay process.

10. Duplicate wells of the same sample were recommended in assay process.

11. Avoid the foam while pour the liquid into wells.

12.For serum or plasma samples ,the biotin-conjugated antibody should be incubate for at least 90 minutes.

Reagent Preparation

1.The reagents should be warmed up to room temperature before use. The remanent reagents must reseal and put into refrigeratory

again as soon as possible.

2.Dilute 1ml of wash buffer Concentrate into 19ml deionized or distilled water to work.

3. If you have a 5x standard diluent, please dilute it with double steaming water or deionized water.

4. Add standard diluent to the bottle according to the volume of the label and wait 15 minutes for complete dissolution. Incubation

temperature should be 25～28℃.。And in turn add the half concentration diluent by standard diluent .

Wash step:

Automated microplate washer or operating by pipette: Each well should be pour into 300ul wash buffer and soak 15 or 30 seconds,then

be aspirated, five times process were repeated. After the last wash, remove remaining wash buffer by aspirating. Invert the plate and blot

it against clean paper towels.

Materials Required But Not Provided

1. pipettes and pipette tips

2. Microwell strip reader capable of reading at 450 nm (540 nm as optional reference wave length)

3. automated microplate washer

4.Glass-distilled or deionized water

Assay procedure

1.The needed strips were putted into the frame, the remains were returned into foil pouch and resealed.

2.Blank well were recommended, which only color reagent and stop solution be added. It is suggested that each testing with gradient

density of standard for standard curve.

3.Add 100ul of standard or sample.Cover with the Plate Covers provided.Incubate for 2 hours at room temperature. If the serum or

plasma sample,you should diluent from 1500 to 6000 times,you can start with 3000times diluent while have no scope.If the cell culture

supernatants,you should diluent 2 times for the assay or diluent further more.

4.Five times wash process were repeated.

5.Add 100ul of detetion antibody. Cover with the Plate Covers provided.Incubate for 1 hour at room temperature.

6.Five times wash process were repeated.

7.Add 100ul of Streptavidin-HRP. Cover with the Plate Covers provided. Lucifugal incubation for 20 minutes at room temperature.

8.Five times wash process were repeated.

9.Add 100ul of TMB，Lucifugal incubation for 20 minutes at room temperature.

10.Add 50ul of stop solution to each well, determine the optical

density of each well within 10 minutes.

上海傳秋生物科技有限公司 424100.com.cnHuman Apolipoprotein E Standard Curve

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Apolipoprotein E Concentration(pg/ml)

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p

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l

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上海傳秋生物科技有限公司 424100.com.cn

Calculation of Results

1.Duplicates should be within 20 percent of the mean. Average absorbance values for each set of duplicate samples were used as

detection results.

2.The blank absorbance values of subtract should be deducted.

3.Drawing a best fit curve through the points of graph. Draw the standard curve by plotting assayed OD valure (on the Y axis) vs.

concentration (on the X axis). The sample concentration was obtained based on its OD value founding in the standard concentration

curve.

4.If the values obtained are not within the expected range of the standard, Samples should be dilute and assay again.

Typical Data and Standard Curve

Concentrati

on

(pg/ml)

Typical data

1

Typical data

2

Average

0 0.097 0.109 0.103

125 0.186 0.202 0.194

250 0.287 0.303 0.295

500 0.512 0.56 0.536

1000 0.858 0.89 0.874

2000 1.623 1.707 1.665

4000 2.941 3.085 3.013

Human Apolipoprotein E Standard Curve

Sensitivity,Specificity, Repeatability

Sensitivity: repeated assays were evaluated and the minimum detectable dose was 79.6pg/ml.

Specificity: No significant cross-reactivity or interference with human ApoA1 ,ApoA2,ApoB ,ApoB100 ,ApoC1, ApoC2,ApoD.

Repeatability: The coefficient of variation between wells or plates is less than 10 per cent.

REFERENCES:

1. Mullick, A.E. et al. (2007) Arterioscler. Throm. Vasc. Biol. 27:339

2. Perugini, M.A. et al. (2000) J. Biol. Chem. 275:36758.

3. Krimbou, L. et al. (2004) J. Lipid. Res. 45:839.

4. Baitsch, D. et al. (2011) Arterioscler. Throm. Vasc. Biol. 31:1160.

5. Jones, P.B. et al. (2011) PLoS ONE 6:e14586.

6. Chroni, A. et al. (2005) Biochemistry 44:13132.