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Procine CXCL14 ELISA Kit

For the quantitative in vitro determination of Procine CXC-chemokine ligand 14 concentrations in

 serum - plasma - tissue homogenates - other biological fluids

FOR LABORATORY RESEARCH USE ONLY.

NOT FOR USE IN DIAGNOSTIC PROCEDURES. 

This package insert must be read in its entirety before using this product.

ELISA

ENZYME LINKED IMMUNOSORBENT ASSAY

INTENDED USE AND TEST PRINCIPLE

This CXCL14 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 CXCL14 in the sample, this CXCL14 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 CXCL14 concentration. The concentration of CXCL14 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 two hours at room temperature or overnight at 4℃ before centrifugation for 20 minutes at approximately 1000×g. Assay freshly prepared serum immediately or store samples in aliquot at -20℃ or -80℃ for later use. Avoid repeated freeze/thaw cycles.

Plasma - Collect plasma using EDTA or heparin as an anticoagulant. Centrifuge samples for 15 minutes at 1000×g at 2-8℃ within 30 minutes of collection. Remove plasma and assay immediately or store samples in aliquot at -20℃ or -80℃ for later use. Avoid repeated freeze/thaw cycles.

Tissue homogenates - For general information, hemolysis blood may affect the result, so you should rinse the tissues with ice-cold PBS (0.01M, pH=7.4) to remove excess blood thoroughly. Tissue pieces should be weighed and then minced to small pieces which will be homogenized in PBS (the volume depends on the weight of the tissue. 9mL PBS would be appropriate to 1 gram tissue pieces. Some protease inhibitor is recommended to add into the PBS.) with a glass homogenizer on ice. To further break the cells, you can sonicate the suspension with an ultrasonic cell disrupter or subject it to freeze-thaw cycles. The homogenates are then centrifugated for 5minutes at 5000×g to get the supernate.

Cell culture supernates and other biological fluids - Centrifuge samples for 20 minutes at 1000×g. Remove particulates and assay immediately or store samples in aliquot at -20℃ or -80℃ for later use. Avoid repeated freeze/thaw cycles.

Note:  The samples shoule be centrifugated dequately and no hemolysis or granule was allowed.

MATERIALS REQUIRED BUT NOT SUPPLIED

1.  37 ℃ incubator

2.  Standard microplate reader capable of measuring absorbance at 450 nm

3.  Precision pipettes, disposable pipette tips and Absorbent paper

4.  Distilled or deionized water

REAGENTS PROVIDED 

All reagents provided are stored at 2-8°C. Refer to the expiration date on the label.

Note:

1.  Standard concentration was followed by: , 0, 0, 0, 0, 0 .

2.  If samples generate values higher than the highest standard, please dilute the samples with Sample Diluent and repeat the assay.

PRECAUTIONS

• Do not substitute reagents from one kit lot to another. Standard, conjugate and microtiter plates are matched for optimal performance. Use only the reagents supplied by manufacturer.
• Allow kit reagents and materials to reach room temperature (20-25°C) before use. Do not use water baths to thaw samples or reagents.
• Do not use kit components beyond their expiration date.
• Use only deionized or distilled water to dilute reagents.
• Do not remove microtiter plate from the storage bag until needed. Unused strips should be stored at 2-8°C in their pouch with the desiccant provided.
• Use fresh disposable pipette tips for each transfer to avoid contamination.
• Do not mix acid and sodium hypochlorite solutions.
• Serum and plasma should be handled as potentially hazardous and capable of transmitting disease. Disposable gloves must be worn during the assay procedure, since no known test method can offer complete assurance that products derived from Rat blood will not transmit infectious agents. Therefore, all blood derivatives should be considered potentially infectious and good laboratory practices should be followed.
• All samples should be disposed of in a manner that will inactivate viruses.
• Liquid Waste: Add sodium hypochlorite to a final concentration of 1.0%. The waste should be allowed to stand for a minimum of 30 minutes to inactivate the viruses before disposal.
• Substrate Solution is easily contaminated. If bluish prior to use, do not use.
• Substrate B contain 20% acetone, keep this reagent away from sources of heat or flame.
• Remove all kit reagents from refrigerator and allow them to reach room temperature ( 20-25°C).

REAGENT PREPARATION AND STORAGE

Wash Solution (1X) - Dilute 1 volume of Wash solution (20X) with 19 volumes of deionized or distilled water. Wash Solution is stable for 1 month at 2-8°C.

ASSAY PROCEDURE

1.  Prepare all reagents before starting assay procedure. It is recommended that all Standards and Samples be added in duplicate to the Microtiter plate.

2.  Add 50μl of Standard or Sample to the appropriate wells. Blank well doesn’t add anyting.

3.  Add 100μl of Enzymeconjugate to standard wells and sample wells except the blank well, cover with an adhesive strip and incubate for 60 minutes at 37°C.

4.  Wash the Microtiter Plate 4 times.

Manual Washing - Remove incubation mixture by aspirating contents of the plate into a sink or proper waste container. Using a squirt bottle, fill each well completely with Wash Solution (1X), then aspirate contents of the plate into a sink or proper waste container. Repeat this procedure for a total of four times. After final wash, invert plate, and blot dry by hitting plate onto absorbent paper or paper towels until no moisture appears. Note: Hold the sides of the plate frame firmly when washing the plate to assure that all strips remain securely in frame.

Automated Washing - Aspirate all wells, then wash plates four times using Wash Buffer (1X). Always adjust your washer to aspirate as much liquid as possible and set fill volume at 350μL/well/wash. After final wash, invert plate, and blot dry by hitting plate onto absorbent paper or paper towels until no moisture appears.

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

6.  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.

7.  Read the Optical Density (O.D.) at 450 nm using a microtiter plate reader within 15 minutes.

CALCULATION OF RESULTS

• 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 (X) axis versus the corresponding concentration on the horizontal (Y) axis.
• First, calculate the mean O.D. value for each standard and sample. All O.D. Values are subtracted by the mean value of the balnk well before result interpretation. Construct the standard curve using graph paper or statistical software.
• 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.
• 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.
• Intra-assay CV(%) is less than 10% and Inter-assay CV(%) is less than 15%.
• Assay range: 0  –  .

7.  Sensitivity: The minimum detectable dose of Procine CXCL14 is typically less than 10 .

8.  Cross-reactivity: This assay recognizes recombinant and natural Procine CXCL14. No significant cross-reactivity or interference was observed.

9.  Storage: 2-8℃ (Use frequently); six months (-20℃)。

10.  Standard curve

FOR RESEARCH USE ONLY; NOT FOR THERAPEUTIC OR DIAGNOSTIC APPLICATIONS! PLEASE READ THROUGH ENTIRE PROCEDURE BEFORE BEGINNING!

豬CXC趨化因子配體14（CXCL14）試劑盒（ELISA）

使用說(shuō)明書(shū)

l 本試劑盒用于體外定量檢測(cè)血清、血漿、組織勻漿及相關(guān)液體樣本中豬CXC趨化因子配體14（CXCL14）的含量。

l 有效期：6個(gè)月

l 保存條件：2-8℃

實(shí)驗(yàn)原理

試劑盒采用雙抗體一步夾心法酶聯(lián)免疫吸附試驗(yàn)（ELISA）。往預(yù)先包被豬CXC趨化因子配體14（CXCL14）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(cè)抗體，經(jīng)過(guò)溫育并*洗滌。用底物TMB顯色，TMB在過(guò)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豬CXC趨化因子配體14（CXCL14）呈正相關(guān)。用酶標(biāo)儀在450nm 波長(zhǎng)下測(cè)定吸光度（OD 值），計(jì)算樣品濃度。

樣本處理及要求

1.  血清：將收集于血清分離管的全血標(biāo)本在室溫放置2小時(shí)或4℃過(guò)夜，然后1000×g離心20 分鐘，取上清即可，或?qū)⑸锨逯糜?20℃或-80℃保存，但應(yīng)避免反復(fù)凍融。
2.  血漿：用EDTA或肝素作為抗凝劑采集標(biāo)本，并將標(biāo)本在采集后的30分鐘內(nèi)于2-8℃ 1000×g離心15分鐘，取上清即可檢測(cè)，或?qū)⑸锨逯糜?20℃或-80℃保存，但應(yīng)避免反復(fù)凍融。
3.  組織勻漿：用預(yù)冷的PBS (0.01M, pH=7.4)沖洗組織，去除殘留血液（勻漿中裂解的紅細(xì)胞會(huì)影響測(cè)量結(jié)果），稱(chēng)重后將*碎。將剪碎的組織與對(duì)應(yīng)體積的PBS（一般按1:9的重量體積比，比如1g的組織樣品對(duì)應(yīng)9mL的PBS，具體體積可根據(jù)實(shí)驗(yàn)需要適當(dāng)調(diào)整，并做好記錄。*在PBS中加入蛋白酶抑制劑）加入玻璃勻漿器中，于冰上充分研磨。為了進(jìn)一步裂解組織細(xì)胞，可以對(duì)勻漿液進(jìn)行超聲破碎，或反復(fù)凍融。后將勻漿液于5000×g離心5~10分鐘，取上清檢測(cè)。

4.  細(xì)胞培養(yǎng)物上清或其它生物標(biāo)本：請(qǐng)1000×g離心20分鐘，取上清即可檢測(cè)，或?qū)⑸锨逯糜?20℃或-80℃保存，但應(yīng)避免反復(fù)凍融。

注：標(biāo)本溶血會(huì)影響后檢測(cè)結(jié)果，因此溶血標(biāo)本不宜進(jìn)行此項(xiàng)檢測(cè)。

需要而未提供的試劑和器材

• 酶標(biāo)儀（450nm）
• 高精度加樣器及槍頭：0.5-10uL、2-20uL、20-200uL、200-1000uL
• 37℃恒溫箱
• 蒸餾水或去離子水

試劑盒組成

備注：

1.  標(biāo)準(zhǔn)品濃度依次為：、0、0、0、0、0

2.  經(jīng)過(guò)大量正常標(biāo)本檢驗(yàn)，標(biāo)本的正常濃度值均在試劑盒提供的檢測(cè)范圍內(nèi)，實(shí)驗(yàn)過(guò)程中直接取50μL樣本上樣即可。當(dāng)有部分樣本值超過(guò)大標(biāo)準(zhǔn)品濃度時(shí)，可用*將標(biāo)本進(jìn)行適當(dāng)稀釋后再進(jìn)行實(shí)驗(yàn)。

注意事項(xiàng)

• 嚴(yán)格按照規(guī)定的時(shí)間和溫度進(jìn)行溫育以保證準(zhǔn)確結(jié)果。所有試劑都必須在使用前達(dá)到室溫20-25℃。使用后立即冷藏保存試劑。
• 洗板不正確可以導(dǎo)致不準(zhǔn)確的結(jié)果。在加入底物前確保盡量吸干孔內(nèi)液體。溫育過(guò)程中不要讓微孔干燥掉。
• 消除板底殘留的液體和手指印，否則影響OD值。
• 底物顯色液應(yīng)呈無(wú)色或很淺的顏色，已經(jīng)變藍(lán)的底物液不能使用。
• 避免試劑和標(biāo)本的交叉污染以免造成錯(cuò)誤結(jié)果。
• 在儲(chǔ)存和溫育時(shí)避免強(qiáng)光直接照射。
• 平衡至室溫后再打開(kāi)密封袋以防水滴凝聚在冷板條上。
• 任何反應(yīng)試劑不能接觸漂白溶劑或漂白溶劑所散發(fā)的強(qiáng)烈氣體。任何漂白成分都會(huì)破壞試劑盒中反應(yīng)試劑的生物活性。
• 不能使用過(guò)期產(chǎn)品。
• 如果可能傳播疾病，所有的樣品都應(yīng)管理好，按照規(guī)定的程序處理樣品和檢測(cè)裝置。

試劑準(zhǔn)備

試劑盒從冷藏環(huán)境中取出應(yīng)在室溫平衡后方可使用。

20×洗滌緩沖液的稀釋?zhuān)赫麴s水按1：20稀釋?zhuān)?份20×洗滌緩沖液加19份蒸餾水。

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.   樣本孔中加入待測(cè)樣本50μL；空白孔不加。
4.   除空白孔外，標(biāo)準(zhǔn)品孔和樣本孔中每孔加入辣根過(guò)氧化物酶（HRP）標(biāo)記的檢測(cè)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(mǎn)洗滌液（350μL），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(jī)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(zhǎng)處測(cè)定各孔的OD值。

實(shí)驗(yàn)結(jié)果計(jì)算

以所測(cè)標(biāo)準(zhǔn)品的OD值為橫坐標(biāo)，標(biāo)準(zhǔn)品的濃度值為縱坐標(biāo)，在坐標(biāo)紙上或用相關(guān)軟件繪制標(biāo)準(zhǔn)曲線(xiàn)，并得到直線(xiàn)回歸方程，將樣品的OD值代入方程，計(jì)算出樣品的濃度。

試劑盒性能

•  檢測(cè)范圍：0  –  。
•  靈敏度：低檢測(cè)濃度小于10 。
•  特異性：不與其它可溶性結(jié)構(gòu)類(lèi)似物交叉反應(yīng)。
•  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% 。