Human HGV ELISA Kit

For the qualitative in vitro determination of Human HGV 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 HGV 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 HGV in the sample, this HGV 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 HGV concentration. The concentration of HGV 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.

PRECAUTIONS

1. 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.
2. Allow kit reagents and materials to reach room temperature (20-25°C) before use. Do not use water baths to thaw samples or reagents.
3. Do not use kit components beyond their expiration date.
4. Use only deionized or distilled water to dilute reagents.
5. 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.
6. Use fresh disposable pipette tips for each transfer to avoid contamination.
7. Do not mix acid and sodium hypochlorite solutions.
8. 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.
9. All samples should be disposed of in a manner that will inactivate viruses.
10. 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.
11. Substrate Solution is easily contaminated. If bluish prior to use, do not use.
12. Substrate B contain 20% acetone, keep this reagent away from sources of heat or flame.
13. 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 Negative control，Positive control and test 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.

DETERMINE THE RESULT

1. Test validity: the average of Positive control well≥0.8; the average of Negative control well ≤0.2.
2. Calculate Critical (CUT OFF): Critical= the average of Negative control well + 0.25.
3. Negative Result: sample OD< Calculate Critical (CUT OFF) is Negative.
4. Positive Result: sample OD≥ Calculate Critical (CUT OFF) is Positive.

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 (X) axis versus the corresponding concentration on the horizontal (Y) 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 balnk well 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. Intra-assay CV(%) and Inter-assay CV（％）are less than 15%.
6. Cross-reactivity: No significant cross-reactivity or interference was observed.
7. Storage: 2-8℃ (Use frequently); six months (-20℃)。

FOR RESEARCH USE ONLY; NOT FOR THERAPEUTIC OR DIAGNOSTIC APPLICATIONS! PLEASE READ THROUGH ENTIRE PROCEDURE BEFORE BEGINNING!
人庚型肝炎病毒抗體（HGV）試劑盒（ELISA）

使用說明書

• 本試劑盒用于體外定性檢測(cè)血清、血漿、組織勻漿及相關(guān)液體樣本中人庚型肝炎病毒抗體（HGV）。
• 有效期：6個(gè)月
• 保存條件：2-8℃

實(shí)驗(yàn)原理

試劑盒采用間接法酶聯(lián)免疫吸附試驗(yàn)（ELISA）。往預(yù)先包被人庚型肝炎病毒抗體（HGV）捕獲抗原的包被微孔中，依次加入標(biāo)本、陰性和陽性對(duì)照，再加入HRP標(biāo)記的檢測(cè)抗體，經(jīng)過溫育并*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人庚型肝炎病毒抗體（HGV）呈正相關(guān)。用酶標(biāo)儀在450nm 波長(zhǎng)下測(cè)定吸光度（OD 值），判定陰陽性。

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℃過夜，然后1000×g離心20 分鐘，取上清即可，或?qū)⑸锨逯糜?/span>-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?/span>-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），稱重后將組織剪碎。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。推薦在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?/span>-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

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
4. 蒸餾水或去離子水

試劑盒組成

注意事項(xiàng)

1. 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。
2. 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。溫育過程中不要讓微孔干燥掉。
3. 消除板底殘留的液體和手指印，否則影響OD值。
4. 底物顯色液應(yīng)呈無色或很淺的顏色，已經(jīng)變藍(lán)的底物液不能使用。
5. 避免試劑和標(biāo)本的交叉污染以免造成錯(cuò)誤結(jié)果。
6. 在儲(chǔ)存和溫育時(shí)避免強(qiáng)光直接照射。
7. 平衡至室溫后再打開密封袋以防水滴凝聚在冷板條上。
8. 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。
9. 不能使用過期產(chǎn)品。
10. 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：蒸餾水按1：20稀釋，即1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)置陰性對(duì)照孔、陽性對(duì)照孔和樣本孔，陰性、陽新對(duì)照孔各加50μL對(duì)照品，樣本孔中加入待測(cè)樣本50μL，空白孔不加。
3.   除空白孔外，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(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。
4.   棄去液體，吸水紙上拍干，每孔加滿洗滌液（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）。
5.   每孔加入底物A、B各50μL，37℃避光孵育15min。
6.   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

1. 陰性對(duì)照OD值：小于0.2。

2. 陽性對(duì)照OD值：大于0.8。

3、陽性判斷（Cut-Off值）：陰性對(duì)照OD值+0.25，樣本OD值大于閾值，判定為陽性，反之，為陰性。

4、重復(fù)性：板內(nèi)變異系數(shù)小于15%。

5、儲(chǔ)藏：2-8℃避光密封保存。