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點擊下載該文件 日期:2015/7/24 14:51:33
Mouse Insulin(INS)ELISA Kit
l For research use only.
l For the quantitative in vitro determination of INS concentrations in Mouse serum, plasma, culture media or any biological fluid.
l Expiration date:six months .
l Storage: 2-8℃.
Principle
This ELISA kit uses Sandwich-ELISA as the method. The Microelisa stripplate provided in this kit has been pre-coated with an antibody specific to INS. Standards or samples are added to the appropriate Microelisa stripplate wells and combined to the specific antibody. Then a Horseradish Peroxidase (HRP)- conjugated antibody specific for INS is added to each Microelisa stripplate well and incubated. Free components are washed away. The TMB substrate solution is added to each well. Only those wells that contain INS and HRP conjugated INS antibody will appear blue in color and then turn yellow after the addition of the stop solution. The optical density (OD) is measured spectrophotometrically at a wavelength of 450 nm. The OD value is proportional to the concentration of INS. You can calculate the concentration of INS in the samples by comparing the OD of the samples to the standard curve.
Materials provided with the kit
| Materials provided with the kit | 48 determinations | 96 determinations | Storage |
1 | User manual | 1 | 1 | R.T. |
2 | Closure plate membrane | 2 | 2 | R.T. |
3 | Sealed bags | 1 | 1 | R.T. |
4 | Microelisa stripplate | 1 | 1 | 2-8℃ |
5 | Standard:18mU/L | 0.5ml×1 bottle | 0.5ml×1 bottle | 2-8℃ |
6 | Standard diluent | 1.5ml×1 bottle | 1.5ml×1 bottle | 2-8℃ |
7 | HRP-Conjugate reagent | 3ml×1 bottle | 6ml×1 bottle | 2-8℃ |
8 | Sample diluent | 3ml×1 bottle | 6ml×1 bottle | 2-8℃ |
9 | Chromogen Solution A | 3ml×1 bottle | 6ml×1 bottle | 2-8℃ |
10 | Chromogen Solution B | 3ml×1 bottle | 6ml×1 bottle | 2-8℃ |
11 | Stop Solution | 3ml×1 bottle | 6ml×1 bottle | 2-8℃ |
12 | wash solution | 20ml(20X)×1bottle | 20ml(30X)×1bottle | 2-8℃ |
Sample preparation
1. Serum preparation
After collection of the whole blood, allow the blood to clot by leaving it undisturbed at room temperature. This usually takes 10-20 minutes. Remove the clot by centrifuging at 2,000-3,000 rpm for 20 minutes. If precipitates appear during reservation, the sample should be centrifugated again.
2. Plasma preparation
Collect the whole blood into tubes with anticoagulant (EDTA or citrate). After incubated at room temperature for 10-20 minutes, tubes are centrifugated for 20 min at 2,000-3,000 rpm. Collect the supernatant carefully as plasma samples. If precipitates appear during reservation, the sample should be centrifugated again.
3. Urine samples
Collect urine into aseptic tubes. Collect the supernatant carefully after centrifuging for 20 min at 2,000-3,000 rpm. If precipitates appear during reservation, the sample should be centrifugated again. The preparation procedure of cerebrospinal fluid and pleuroperitoneal fluid is the same as that of urine sample.
4. Cell samples
If you want to detect the secretions of cells, collect culture supernatant into aseptic tubes. Collect the supernatant carefully after centrifuging for 20 min at 2,000-3,000 rpm. If you want to detect intracellular components, dilute the cells to 1X100/ml with PBS (pH 7.2-7.4). The cells were destroyed to release intracellular components by repeated freezing and thawing. Collect the supernatant carefully after centrifuging for 20 min at 2,000-3,000 rpm. If precipitates appear during reservation, the sample should be centrifugated again.
5. Tissue samples
Tissue samples are cut, weighed, frozen in liquid nitrogen and stored at -80℃ for future use. The tissue samples were homogenized after adding PBS (pH 7.4). Samples should be operated at 4℃. Collect the supernatant carefully after centrifuging for 20 min at 2,000-3,000 rpm. Aliquot the supernatant for ELISA assay and future use.
Notes:
1. Sample extraction and ELISA assay should be performed as soon as possible after sample collection. The samples should be extracted according to the relevant literature. If ELISA assay can not be performed immediately, samples can be stored at -20℃.Repeated freeze-thaw cycles should be avoided.
2. Our kits can not be used for samples with NaN3 which can inhibit the activity of HRP.
Procedure
1. Dilution of Standards
Ten wells are set for standards in a Microelisa stripplate. In Well 1 and Well 2, 100μl Standard solution and 50μl Standard Dilution buffer are added and mixed well. In Well 3 and Well 4, 100μl solution from Well 1 and Well 2 are added respectively. Then 50μl Standard Dilution buffer are added and mixed well. 50μl solution is discarded from Well 3 and Well 4. In Well 5 and Well 6, 50μl solution from Well 3 and Well 4 are added respectively. Then 50μl Standard Dilution buffer are added and mixed well. In Well 7 and Well 8, 50μl solution from Well 5 and Well 6 are added respectively. Then 50μl Standard Dilution buffer are added and mixed well. In Well 9 and Well 10, 50μl solution from Well 7 and Well 8 are added respectively. Then 50μl Standard Dilution buffer are added and mixed well. 50μl solution is discarded from Well 9 and Well 10. After dilution, the total volume in all the wells are 50μl and the concentrations are 12 mU/L,8 mU/L,4 mU/L, 2 mU/L and 1 mU/L, respectively.
2. In the Microelisa stripplate, leave a well empty as blank control. In sample wells, 40μl Sample dilution buffer and 10μl sample are added (dilution factor is 5). Samples should be loaded onto the bottom without touching the well wall. Mix well with gentle shaking.
3. Incubation: incubate 30 min at 37℃ after sealed with Closure plate membrane.
4. Dilution: dilute the concentrated washing buffer with distilled water (30 times for 96T and 20 times for 48T).
5. Washing: carefully peel off Closure plate membrane, aspirate and refill with the wash solution. Discard the wash solution after resting for 30 seconds. Repeat the washing procedure for 5 times.
6. Add 50 μl HRP-Conjugate reagent to each well except the blank control well.
7. Incubation as described in Step 3.
8. Washing as described in Step 5.
9. Coloring: Add 50 μl Chromogen Solution A and 50 μl Chromogen Solution B to each well, mix with gently shaking and incubate at 37℃ for 15 minutes. Please avoid light during coloring.
10. Termination: add 50 μl stop solution to each well to terminate the reaction. The color in the well should change from blue to yellow.
11. Read absorbance O.D. at 450nm using a Microtiter Plate Reader. The OD value of the blank control well is set as zero. Assay should be carried out within 15 minutes after adding stop solution.
Notes:
1. Store the kit at 4°C upon receipt.The kit should be equilibrat4ed to room temperature before the assay. Remove any unneeded strips from Mouse INS Antibody-Coated plate, reseal them in zip-lock foil and keep at 4°C.
2. Precipitates may appear in concentrated washing buffer. Please heat the buffer to dissolve all the precipitates, which will not affect the results.
3. Accurate pipette should be used to avoid experimental error. Samples should be added to the Microplate in less than 5 minutes. If a large number of samples are included, multiple channel pipette is recommended.
4. Standard curve should be included in every assay. Replicate wells are recommended. If the OD value of the sample is greater than the first well of standards, please dilute the sample (n times) before test. When calculating the original INS a concentration, please multiply the total dilution factor (XnX5).
5. In order to avoid cross-contamination, Microplate sealers are for one-time use only.
6. Please keep Substrate away from light.
7. All the operation should be accordance with the manufacturer's instructions strictly. The results determined by the Microtiter Plate Reader.
8. All the samples, washing buffer and wastes should be treated as infectious agents.
9. Reagents from different lots should not be mixed.
Calculation of Results
Kit performance
1. Correlation coefficient (R) of linear regression of the samples is more than 0.92
2. The difference in intra-assay and inter-assay is less than 9% and 15% respectively.
Assay range
0.3mU/L -15 mU/L
小鼠胰島素(INS)酶聯(lián)免疫分析(ELISA)
試劑盒使用說明書
l 本試劑盒僅供科研使用。
l 本試劑盒用于體外定量檢測小鼠血清、血漿、組織、細胞上清及相關(guān)液體樣本中胰島素(INS)的含量。
l 有效期:6個月
l 保存條件:2-8℃
實驗原理
本試劑盒應(yīng)用雙抗體夾心法測定標本中小鼠胰島素(INS)水平。用純化的小鼠胰島素(INS)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小鼠胰島素(INS),再與HRP標記的小鼠胰島素(INS)抗體結(jié)合,形成抗體-抗原-酶標抗體復(fù)合物,經(jīng)過徹底洗滌后加底物TMB顯色。TMB在HRP酶的催化下轉(zhuǎn)化成藍色,并在酸的作用下轉(zhuǎn)化成最終的黃色。顏色的深淺和樣品中的胰島素(INS)呈正相關(guān)。用酶標儀在450nm波長下測定吸光度(OD值),通過標準曲線計算樣品中小鼠胰島素(INS)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 | R.T. |
封板膜 | 2片(48) | 2片(96) | R.T. |
密封袋 | 1個 | 1個 | R.T. |
酶標包被板 | 1×48 | 1×96 | 2-8℃保存 |
標準品:18mU/L | 0.5ml×1瓶 | 0.5ml×1瓶 | 2-8℃保存 |
標準品稀釋液 | 1.5ml×1瓶 | 1.5ml×1瓶 | 2-8℃保存 |
酶標試劑 | 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、腦脊液參照實行。
4. 細胞培養(yǎng)上清:檢測分泌性的成份時,用無菌管收集。離心20分鐘左右(2000-3000轉(zhuǎn)/分)。仔細收集上清。檢測細胞內(nèi)的成份時,用PBS(PH7.2-7.4)稀釋細胞懸液,細胞濃度達到100萬/ml左右。通過反復(fù)凍融,以使細胞破壞并放出細胞內(nèi)成份。離心20分鐘左右(2000-3000轉(zhuǎn)/分)。仔細收集上清。保存過程中如有沉淀形成,應(yīng)再次離心。
5. 組織標本:切割標本后,稱取重量。加入一定量的PBS,PH7.4。用液氮迅速冷凍保存?zhèn)溆。標本融化后仍然保?-8℃的溫度。加入一定量的PBS(PH7.4),用手工或勻漿器將標本勻漿充分。離心20分鐘左右(2000-3000轉(zhuǎn)/分)。仔細收集上清。分裝后一份待檢測,其余冷凍備用。
6. 標本采集后盡早進行提取,提取按相關(guān)文獻進行,提取后應(yīng)盡快進行實驗。若不能馬上進行試驗,可將標本放于-20℃保存,但應(yīng)避免反復(fù)凍融.
7. 不能檢測含NaN3的樣品,因NaN3抑制辣根過氧化物酶的(HRP)活性。
操作步驟
1.標準品的稀釋與加樣:在酶標包被板上設(shè)標準品孔10孔,在第一、第二孔中分別加標準品100μl,然后在第一、第二孔中加標準品稀釋液50μl,混勻;然后從第一孔、第二孔中各取100μl分別加到第三孔和第四孔,再在第三、第四孔分別加標準品稀釋液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、第六孔中分別加標準品稀釋液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、第八孔中分別加標準品稀釋液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準品稀釋液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12 mU/L, 8mU/L, 4 mU/L, 2 mU/L and1 mU/L)
2.加樣:分別設(shè)空白孔(空白對照孔不加樣品及酶標試劑,其余各步操作相同)、待測樣品孔。在酶標包被板上待測樣品孔中先加樣品稀釋液40μl,然后再加待測樣品10μl(樣品最終稀釋度為5倍)。加樣將樣品加于酶標板孔底部,盡量不觸及孔壁,輕輕晃動混勻。
3.溫育:用封板膜封板后置37℃溫育30分鐘。
4.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。
5.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。
6.加酶:每孔加入酶標試劑50ul,空白孔除外。
7.溫育:操作同3。
8.洗滌:操作同5。
9.顯色:每孔先加入顯色劑A50ul,再加入顯色劑B50ul,輕輕震蕩混勻,37℃避光顯色15分鐘.
10.終止:每孔加終止液50ul,終止反應(yīng)(此時藍色立轉(zhuǎn)黃色)。
11.測定:以空白孔調(diào)零,450nm波長依序測量各孔的吸光度(OD值)。 測定應(yīng)在加終止液后15分鐘以內(nèi)進行。
注意事項
1.試劑盒從冷藏環(huán)境中取出應(yīng)在室溫平衡15-30分鐘后方可使用,酶標包被板開封后如未用完,板條應(yīng)裝入密封袋中保存。
2.濃洗滌液可能會有結(jié)晶析出,稀釋時可在水浴中加溫助溶,洗滌時不影響結(jié)果。
3.各步加樣均應(yīng)使用加樣器,并經(jīng)常校對其準確性,以避免試驗誤差。一次加樣時間最好控制在5分鐘內(nèi),如標本數(shù)量多,推薦使用排槍加樣。
4.請每次測定的同時做標準曲線,最好做復(fù)孔。如標本中待測物質(zhì)含量過高(樣本OD值大于標準品孔第一孔的OD值),請先用樣品稀釋液稀釋一定倍數(shù)(n倍)后再測定,計算時請最后乘以總稀釋倍數(shù)(×n×5)。
5.封板膜只限一次性使用,以避免交叉污染。
6.底物請避光保存。
7.嚴格按照說明書的操作進行,試驗結(jié)果判定必須以酶標儀讀數(shù)為準.
8.所有樣品,洗滌液和各種廢棄物都應(yīng)按傳染物處理。
9.本試劑不同批號組分不得混用。
10.如與英文說明書有異,以英文說明書為準。
計算
以標準物的濃度為橫坐標,OD值為縱坐標,
在坐標紙上繪出標準曲線,根據(jù)樣品的OD
值由標準曲線查出相應(yīng)的濃度;再乘以稀釋
倍數(shù);或用標準物的濃度與OD值計算出標
準曲線的直線回歸方程式,將樣品的OD值
代入方程式,計算出樣品濃度,再乘以稀釋
倍數(shù),即為樣品的實際濃度。
(此圖僅供參考)
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0.92以上。
2.批內(nèi)與批間應(yīng)分別小于9%和15%
檢測范圍:
0.3mU/L -15 mU/L
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