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Rat Neuron-Specific Enolase (NSE)
ELISA Kit
This immunoassay kit allows for the in vitro quantitative determination of rat
NSE concentrations in cell culture supernates, serum, plasma and other
biological fluids.
Expiration date six months from the date of manufacture
FOR RESEARCH USE ONLY. NOT FOR USE IN DIAGNOSTIC
PROCEDURES.
2
INTRODUCTION
Neuron Specific Enolase (NSE) is the most abundant form of the glycolytic
enolase found in adult neurons and is thought to serve as a growth factor in
neurons. Of the three enolase subunits (α, β, and γ), NSE is a dimer composed of
two γ subunits.
NSE is useful in studying neuronal differentiation and is, therefore, a valuable tool
for visualizing the entire neuron and endocrine systems. Serum levels of NSE have
been associated with such disease states as Alzheimer's, Huntington's Chorea,
neuroblastoma, head trauma, neuroendocrine malignancies, and small cell
carcinomas of the lung.
PRINCIPLE OF THE ASSAY
The microtiter plate provided in this kit has been pre-coated with an antibody
specific to NSE. Standards or samples are then added to the appropriate microtiter
plate wells with a biotin-conjugated polyclonal antibody preparation specific for
NSE and Avidin conjugated to Horseradish Peroxidase (HRP) is added to each
microplate well and incubated. Then a TMB (3,3'5, 5' tetramethyl-benzidine)
substrate solution is added to each well. Only those wells that contain NSE,
biotin-conjugated antibody and enzyme-conjugated Avidin will exhibit a change in
color. The enzyme-substrate reaction is terminated by the addition of a sulphuric
acid solution and the color change is measured spectrophotometrically at a
wavelength of 450 nm ± 2 nm. The concentration of NSE in the samples is then
determined by comparing the O.D. of the samples to the standard curve.
DETECTION RANGE
0.625 ng/ml-40 ng/ml. The standard curve concentrations used for the ELISA’s
were 40 ng/ml, 20 ng/ml, 10 ng/ml, 5 ng/ml, 2.5 ng/ml, 1.25 ng/ml, 0.625 ng/ml.
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SPECIFICITY
This assay recognizes recombinant and natural rat NSE. No significant
cross-reactivity or interference was observed.
SENSITIVITY
The minimum detectable dose of rat NSE is typically less than 0.156 ng/ml.
The sensitivity of this assay, or Lower Limit of Detection (LLD) was defined as
the lowest protein concentration that could be differentiated from zero.
MATERIALS PROVIDED
Reagent Quantity
Assay plate 1
Standard 2
Sample Diluent 1 x 20 ml
Biotin-antibody Diluent 1 x 10 ml
HRP-avidin Diluent 1 x 10 ml
Biotin-antibody 1 x 120l
HRP-avidin 1 x 120l
Wash Buffer
1 x 20 ml
(25×concentrate)
TMB Substrate 1 x 10 ml
Stop Solution 1 x 10 ml
STORAGE
1. Unopened test kits should be stored at 2-8°C upon receipt and the microtiter
plate should be kept in a sealed bag with desiccants to minimize exposure to
damp air. The test kit may be used throughout the expiration date of the kit.
Refer to the package label for the expiration date.
4
2. Opened test kits will remain stable until the expiring date shown, provided it is
stored as prescribed above.
3. A microtiter plate reader with a bandwidth of 10 nm or less and an optical
density range of 0-3 OD or greater at 450nm wavelength is acceptable for use
in absorbance measurement.
REAGENT PREPARATION
Bring all reagents to room temperature before use.
1. Wash Buffer If crystals have formed in the concentrate, warm up to room
temperature and mix gently until the crystals have compley dissolved.
Dilute 20 ml of Wash Buffer Concentrate into deionized or distilled water to
prepare 500 ml of Wash Buffer.
2. Standard Reconstitute the Standard with 1.0 ml of Sample Diluent. This
reconstitution produces a stock solution of 40 ng/ml. Allow the standard to sit
for a minimum of 15 minutes with gentle agitation prior to making serial
dilutions. The undiluted standard serves as the high standard (40 ng/ml). The
Sample Diluent serves as the zero standard (0 ng/ml).
3. Biotin-antibody Dilute to the working concentration specified on the vial
label using Biotin-antibody Diluent(1:100), respectively.
4. HRP-avidin Dilute to the working concentration specified on the vial label
using HRP-avidin Diluent(1:100), respectively.
Precaution: The Stop Solution provided with this kit is an acid solution. Wear
eye, hand, face, and clothing protection when using this material.
OTHER SUPPLIES REQUIRED
Microplate reader capable of measuring absorbance at 450 nm, with the
correction wavelength set at 540 nm or 570 nm.
Pipettes and pipette tips.
Deionized or distilled water.
Squirt bottle, manifold dispenser, or automated microplate washer.
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SAMPLE COLLECTION AND STORAGE
Cell Culture Supernates Remove particulates by centrifugation and assay
immediay or aliquot and store samples at -20° C. Avoid repeated
freeze-thaw cycles.
Serum Use a serum separator tube (SST) and allow samples to clot for 30
minutes before centrifugation for 15 minutes at 1000 g. Remove serum and
assay immediay or aliquot and store samples at -20° C. Avoid repeated
freeze-thaw cycles.
Plasma Collect plasma using citrate, EDTA, or heparin as an anticoagulant.
Centrifuge for 15 minutes at 1000 g within 30 minutes of collection. Assay
immediay or aliquot and store samples at -20° C. Avoid repeated
freeze-thaw cycles.
Note: Grossly hemolyzed samples are not suitable for use in this assay.
ASSAY PROCEDURE
Bring all reagents and samples to room temperature before use. It is
recommended that all samples, standards, and controls be assayed in duplicate.
1. Add 100l of Standard, Blank, or Sample per well. Cover with the adhesive
strip. Incubate for 2 hours at 37° C.
2. Remove the liquid of each well, don’t wash.
3. Add 100l of Biotin-antibody working solution to each well. Incubate for 1
hour at 37°C. Biotin-antibody working solution may appear cloudy. Warm up
to room temperature and mix gently until solution appears uniform.
4. Aspirate each well and wash, repeating the process three times for a total of
three washes. Wash by filling each well with Wash Buffer (200l) using a
squirt bottle, multi-channel pipette, manifold dispenser or autowasher.
Complete removal of liquid at each step is essential to good performance.
After the last wash, remove any remaining Wash Buffer by aspirating or
decanting. Invert the plate and blot it against clean paper towels.
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5. Add 100l of HRP-avidin working solution to each well. Cover the microtiter
plate with a new adhesive strip. Incubate for 1 hour at 37°C.
6. Repeat the aspiration and wash three times as step 4.
7. Add 90l of TMB Substrate to each well. Incubate for 30 minutes at 37°C.
Keeping the plate away from drafts and other temperature fluctuations in the
dark.
8. Add 50l of Stop Solution to each well. If color change does not appear
uniform, gently tap the plate to ensure thorough mixing.
9. Determine the optical density of each well within 30 minutes, using a
microplate reader set to 450 nm.
CALCULATION OF RESULTS
Average the duplicate readings for each standard, control, and sample and subtract
the average zero standard optical density. Create a standard curve by reducing the
data using computer software capable of generating a four parameter logistic (4-PL)
curve-fit. As an alternative, construct a standard curve by plotting the mean
absorbance for each standard on the y-axis against the concentration on the x-axis
and draw a best fit curve through the points on the graph. The data may be
linearized by plotting the log of the NSE concentrations versus the log of the O.D.
and the best fit line can be determined by regression analysis. This procedure will
produce an adequate but less precise fit of the data. If samples have been diluted,
the concentration read from the standard curve must be multiplied by the dilution
factor.
LIMITATIONS OF THE PROCEDURE
The kit should not be used beyond the expiration date on the kit label.
Do not mix or substitute reagents with those from other lots or sources.
It is important that the Calibrator Diluent selected for the standard curve be
consistent with the samples being assayed.
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If samples generate values higher than the highest standard, dilute the samples
with the appropriate Calibrator Diluent and repeat the assay.
Any variation in Standard Diluent, operator, pipetting technique, washing
technique, incubation time or temperature, and kit age can cause variation in
binding.
This assay is designed to eliminate interference by soluble receptors, binding
proteins, and other factors present in biological samples. Until all factors have
been tested in the Quantikine Immunoassay, the possibility of interference
cannot be excluded.
TECHNICAL HINTS
When mixing or reconstituting protein solutions, always avoid foaming.
To avoid cross-contamination, change pipette tips between additions of each
standard level, between sample additions, and between reagent additions. Also,
use separate reservoirs for each reagent.
When using an automated plate washer, adding a 30 second soak period
following the addition of wash buffer, and/or rotating the plate 180 degrees
between wash steps may improve assay precision.
To ensure accurate results, proper adhesion of plate sealers during incubation
steps is necessary.
Substrate Solution should remain colorless until added to the plate. Keep
Substrate Solution protected from light. Substrate Solution should change
from colorless to gradations of blue.
Stop Solution should be added to the plate in the same order as the Substrate
Solution. The color developed in the wells will turn from blue to yellow upon
addition of the Stop Solution. Wells that are green in color indicate that the
Stop Solution has not mixed thoroughly with the Substrate Solution.
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大鼠神經特異性烯醇化酶 大鼠神經特異性烯醇化酶 大鼠神經特異性烯醇化酶 大鼠神經特異性烯醇化酶(NSE)酶聯免疫分析 酶聯免疫分析 酶聯免疫分析 酶聯免疫分析
試劑盒使用說明書 試劑盒使用說明書 試劑盒使用說明書 試劑盒使用說明書
本試劑盒僅供研 本試劑盒僅供研 本試劑盒僅供研 本試劑盒僅供研究使用 究使用 究使用 究使用
產品編號 產品編號 產品編號 產品編號: :: :CSB-E07963r
檢測范圍 檢測范圍 檢測范圍 檢測范圍: :: :0.625 ng/ml - 40 ng/ml
zui低檢測限 zui低檢測限 zui低檢測限 zui低檢測限: :: :0.156 ng/ml
特異性 特異性 特異性 特異性: :: :本試劑盒可同時檢測天然或重組的大鼠 NSE,且與其他相關蛋白
無交叉反應。
有效期 有效期 有效期 有效期: :: :6 個月
預期應用 預期應用 預期應用 預期應用: :: :ELISA 法定量測定大鼠血清、血漿、細胞培養上清或其它相關
生物液體中 NSE含量。
說明 說明 說明 說明
1. 試劑盒保存:-20℃(較長時間不用時);2-8℃(頻繁使用時)。
2. 濃洗滌液低溫保存會有鹽析出,稀釋時可在水浴中加溫助溶。
3. 中、英文說明書可能會有不一致之處,請以英文說明書為準。
4. 剛開啟的酶聯板孔中可能會含有少許水樣物質,此為正常現象,不會對實
驗結果造成任何影響。
概述 概述 概述 概述
烯醇化酶(Enolase)是參與糖酵解的酶,催化 2-磷酸甘油酸向磷酸烯醇
丙酮酸的轉化,由三種亞基(α、β、γ)組成的二聚體同功酶。其中 ag 和 gg
烯醇化酶同功酶存在于神經元及神經來源的細胞中,也稱為神經元特異性烯
醇化酶(Neurone specific enolase ,NSE)。在正常人群中 NSE含量較低,但
在某些神經內皮細胞增生的惡性疾病,如神經母細胞瘤(Neuroblastoma),其
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含量往往上升。由于小細胞肺癌(Small cell lung carcinoma,SCLC)是zui常
表現有神經內分泌性質的腫瘤,目前 NSE也是 SCLC zui敏感zui特異的腫瘤標
志物。肺癌是近年來發病率日趨增高的癌種,在種種肺癌中小細胞肺癌占大
約 20%,因此正確診斷肺癌的類型,特別是確定小細胞肺癌的診斷很重要。
小細胞肺癌患者的 ag 和 gg同功酶含量均有不同比例的增高,因些必須在同
一敏感度下同時檢測 NSE的 ag和 gg同功酶含量。本試劑盒所用單抗只針對
NSE 的 g 亞基,而與 a 或 β 亞基無交差反應。據文獻報道,NSE 含量測定可
作為肺癌、成神經細胞瘤、黑素瘤、精原細胞瘤以及中樞精神系統損傷的診
斷指標。同時,也可用于 SCLC 治療前后療效的監測與預后,以及 SCLC 與
其它型肺癌的鑒別診斷。
實驗原理 實驗原理 實驗原理 實驗原理
用純化的抗體包被微孔板,制成固相載體,往包被抗 NSE抗體的微孔中
依次加入標本或標準品、*化的抗 NSE抗體、HRP 標記的親和素,經過
*洗滌后用底物 TMB 顯色。TMB 在過氧化物酶的催化下轉化成藍色,并
在酸的作用下轉化成zui終的黃色。顏色的深淺和樣品中的 NSE呈正相關。用
酶標儀在 450nm 波長下測定吸光度(OD值),計算樣品濃度。
試劑盒組成及試劑配制 試劑盒組成及試劑配制 試劑盒組成及試劑配制 試劑盒組成及試劑配制
1. 酶聯板 酶聯板 酶聯板 酶聯板(Assay plate ): 一塊(96 孔)。
2. 標準品 標準品 標準品 標準品 (Standard): 2 瓶(凍干品)。
3. 樣品稀釋液 樣品稀釋液 樣品稀釋液 樣品稀釋液(Sample Diluent): 1×20ml/瓶。
4. *標記抗體稀釋液 *標記抗體稀釋液 *標記抗體稀釋液 *標記抗體稀釋液( (( (Biotin-antibody Diluent) )) ): 1×10ml/瓶。
5. 辣根過氧化物酶標記親和素稀 辣根過氧化物酶標記親和素稀 辣根過氧化物酶標記親和素稀 辣根過氧化物酶標記親和素稀釋液 釋液 釋液 釋液 ( (( (HRP-avidin Diluent) )) ): 1×10ml/瓶。
6. *標記抗體 *標記抗體 *標記抗體 *標記抗體( (( (Biotin-antibody) )) ): 1×120l/瓶(1:100)。
7. 辣根過氧化物酶標記親和素 辣根過氧化物酶標記親和素 辣根過氧化物酶標記親和素 辣根過氧化物酶標記親和素( (( (HRP-avidin) )) ): 1×120l/瓶(1:100)。
8. 底物溶液 底物溶液 底物溶液 底物溶液( (( (TMB Substrate) )) ): 1×10ml/瓶。
9. 濃洗滌液 濃洗滌液 濃洗滌液 濃洗滌液( (( (Wash Buffer) )) ): 1×20ml/瓶,使用時每瓶用蒸餾水稀釋 25 倍。
10. 終止液 終止液 終止液 終止液 ( (( (Stop Solution) )) ): 1×10ml/瓶(2N H2SO4)。
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需要而未提供的試劑和器材 需要而未提供的試劑和器材 需要而未提供的試劑和器材 需要而未提供的試劑和器材
1. 標準規格酶標儀
2. 高速離心機
3. 電熱恒溫培養箱
4. 干凈的試管和 Eppendof管
5. 系列可調節移液器及吸頭,一次檢測樣品較多時,用多通道移液器
6. 蒸餾水,容量瓶等
標本的采集及保存 標本的采集及保存 標本的采集及保存 標本的采集及保存
1. 血清:全血標本請于室溫放置 2 小時或 4℃過夜后于 1000g離心 20 分鐘,
取上清即可檢測,或將標本放于-20℃或-80℃保存,但應避免反復凍融。
2. 血漿:可用EDTA或肝素作為抗凝劑,標本采集后30分鐘內于2 - 8°C 1000
g離心 15 分鐘,或將標本放于-20℃或-80℃保存,但應避免反復凍融。
3. 細胞培養物上清或其它生物標本:1000g離心 20 分鐘,取上清即可檢測,
或將標本放于-20℃或-80℃保存,但應避免反復凍融。
注 注注 注: :: :標本溶血會影響zui后檢測結果 標本溶血會影響zui后檢測結果 標本溶血會影響zui后檢測結果 標本溶血會影響zui后檢測結果, ,, ,因此溶血標本不宜進行此項檢測 因此溶血標本不宜進行此項檢測 因此溶血標本不宜進行此項檢測 因此溶血標本不宜進行此項檢測。 。。 。
標本的稀釋原則 標本的稀釋原則 標本的稀釋原則 標本的稀釋原則: :: :
首先通過文獻檢索的方式了解待測樣本的大致含量,確定適當的稀釋倍數。
只有稀釋至標準曲線的范圍內,檢測的結果才是準確的。稀釋的過程中,應
做好詳細的記錄。zui后計算濃度時,稀釋了“N”倍,標本的濃度應再乘以“N”。
標準 標準 標準 標準品的稀釋原則 品的稀釋原則 品的稀釋原則 品的稀釋原則: :: :2 瓶,每瓶臨用前以樣品稀釋液稀釋至 1ml,蓋好后
靜置 10 分鐘以上,然后反復顛倒/搓動以助溶解,其濃度為 40 ng/ml,做系列
倍比稀釋后,分別稀釋 40 ng/ml,20 ng/ml,10 ng/ml,5 ng/ml,2.5 ng/ml,
1.25 ng/ml,0.625 ng/ml,樣品稀釋液直接作為標準濃度 0 ng/ml,臨用前 15
分鐘內配制。
如配制 20 ng/ml 標準品:取 0.5ml(不要少于 0.5ml)40 ng/ml 的上述標準品
加入含 0.5ml 樣品稀釋液的 Eppendorf管中,混勻即可,其余濃度以此類推。
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*標記抗體的稀釋原則 *標記抗體的稀釋原則 *標記抗體的稀釋原則 *標記抗體的稀釋原則: :: :
臨用前以*標記抗體稀釋液稀釋,稀釋前根據預先計算好的每次實驗所
需的總量配制(每孔 100l),實際配制時應多配制 0.1-0.2ml。如 10l *
標記抗體加 990l *標記抗體稀釋液的比例配制,輕輕混勻,在使用前
一小時內配制。
辣根過氧化物酶標記親和素的稀釋原則 辣根過氧化物酶標記親和素的稀釋原則 辣根過氧化物酶標記親和素的稀釋原則 辣根過氧化物酶標記親和素的稀釋原則: :: :
臨用前以辣根過氧化物酶標記親和素稀釋液稀釋,稀釋前根據預先計算好的
每次實驗所需的總量配制(每孔 100l),實際配制時應多配制 0.1-0.2ml。如
10l 辣根過氧化物酶標記親和素加 990l 辣根過氧化物酶標記親和素稀釋
液 的比例配制,輕輕混勻,在使用前一小時內配制。
操作步驟 操作步驟 操作步驟 操作步驟
實驗開始前,請提前配置好所有試劑,試劑或樣品稀釋時,均需混勻,混勻
時盡量避免起泡。每次檢測都應該做標準曲線。如樣品濃度過高時,用樣品
稀釋液進行稀釋,以使樣品符合試劑盒的檢測范圍。
1. 加樣:分別設空白孔、標準孔、待測樣品孔。空白孔加樣品稀釋液 100l,
余孔分別加標準品或待測樣品 100l,注意不要有氣泡,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,酶標板加上蓋或覆膜,
37℃反應 120 分鐘。
為保證實驗結果有效性,每次實驗請使用新的標準品溶液。
2. 棄去液體,甩干,不用洗滌。每孔加*標記抗體工作液 100l(取 1l
*標記抗體加 99l *標記抗體稀釋液的比例配制,輕輕混勻,
在使用前一小時內配制),37 ,60 ℃ 分鐘。
3. 溫育 60 分鐘后,棄去孔內液體,甩干,洗板 3 次,每次浸泡 1-2 分鐘,
200l/每孔,甩干。
4. 每孔加辣根過氧化物酶標記親和素工作液(同*標記抗體工作液)
100l,37℃,60 分鐘。
5. 溫育 60 分鐘后,棄去孔內液體,甩干,洗板 5 次,每次浸泡 1-2 分鐘,
200l/每孔,甩干。
6. 依序每孔加底物溶液 90l,37℃避光顯色( (( (30 分鐘內,此時肉眼可見標
準品的前 3-4 孔有明顯的梯度藍色,后 3-4 孔顯色不明顯,即可終止)。
7. 依序每孔加終止溶液 50l,終止反應(此時藍色立轉黃色)。終止液的加
入順序應盡量與底物液的加入順序相同。為了保證實驗結果的準確性,底
物反應時間到后應盡快加入終止液。
8. 用酶聯儀在 450nm 波長依序測量各孔的光密度(OD值)。 在加終止液后
15 分鐘以內進行檢測。
12
實驗備注 實驗備注 實驗備注 實驗備注
1. 用戶在初次使用試劑盒時,應將各種試劑管離心數分鐘,以便試劑集中到
管底。
2. 每次實驗留一孔作為空白調零孔,該孔不加任何試劑,只是zui后加底物溶
液及 2N H2SO4。測量時先用此孔調 OD值至零。
3. 為防止樣品蒸發,試驗時將反應板放于鋪有濕布的密閉盒內,酶標板加上
蓋或覆膜。
4. 未使用完的酶標板或者試劑,請于 2-8℃保存。標準品、*標記抗體
工作液、辣根過氧化物酶標記親和素工作液請依據所需的量配置使用。請
勿重復使用已稀釋過的標準品、*標記抗體工作液、或辣根過氧化物
酶標記親和素工作液。
5. 建議檢測樣品時均設雙孔測定,以保證檢測結果的準確性。
洗板方法 洗板方法 洗板方法 洗板方法
手工洗板方法:吸去(不可觸及板壁)或甩掉酶標板內的液體;在實驗臺上
鋪墊幾層吸水紙,酶標板朝下用力拍幾次;將推薦的洗滌緩沖液至少 0.3ml
注入孔內,浸泡 1-2 分鐘。根據需要,重復此過程數次。
自動洗板:如果有自動洗板機,應在熟練使用后再用到正式實驗過程中。
計算 計算 計算 計算
以標準物的濃度為橫坐標(對數坐標),OD值為縱坐標(普通坐標),在半對
數坐標紙上繪出標準曲線,根據樣品的 OD 值由標準曲線查出相應的濃度;
再乘以稀釋倍數;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,即
為樣品的實際濃度。
注意事項 注意事項 注意事項 注意事項
1. 當混合蛋白溶液時應盡量輕緩,避免起泡。
2. 洗滌過程非常重要,不充分的洗滌易造成假陽性。
3. 一次加樣時間控制在 5 分鐘內,如標本數量多,推薦使用排槍加樣。
4. 請每次測定的同時做標準曲線,做復孔。
5. 如標本中待測物質含量過高,請先稀釋后再測定,計算時請zui后乘以稀釋
倍數。
6. 在配制標準品、檢測溶液工作液時,請以相應的稀釋液配制,不能混淆。
7. 底物請避光保存。
8. 不要用其它生產廠家的試劑替換試劑盒中的試劑。
環保在線 設計制作,未經允許翻錄必究 .? ? ?
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