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大鼠白細胞介素 17A 定量分析酶聯免疫檢測試劑盒

本試劑盒僅供科研使用 。用於體外定量檢測大鼠血清 、血漿或細胞培養上清液中的 IL-17A 濃度 。使用前請仔細閱讀說明書並檢查試劑

組分是否完整,如有產品包裝破損或質量投拆 ，請在收到貨一個月之內聯係尊龍凱時 。

IL-17A 簡介 ：

白介 17A ，一類新的細胞因子家族 ，一般是由一個二硫鍵連接的同型二聚體 。每個肽鏈含有 155 個氨基酸殘基 ，分子量約為 17.5kDa 。

白介 17 家族共有六個成員 ，其中具同型二聚體結構 ，分子量約為 32kDa 的白介 17A 主要由活化的 T 記憶細胞產生 ，刺激機體的免疫 。

許多證據都表明 IL-17A 具有調控免疫反應的功能 。IL-17A 調控 T 細胞造血係統細胞間的通訊已被證明 。T 細胞產生的 IL-17A 通過 NF-

κ B 通路的作用 ，誘導成纖維細胞產生 IL-6, IL-8, ICAM-1 和 G-CSF 等細胞因子 。IL-17A 也可通過刺激 T 細胞來提高 T 細胞本身的擴增

和提高在骨關節炎患者軟骨中 NO 水平的增高 。

最近的研究表明 ，IL-17A 家族的細胞因子在炎症性疾病 、自身免疫病和腫瘤等發生中均有重要的作用 。幾種如氣管炎 、類風濕性關節

炎 、腹膜炎引起的粘連和膿腫 、腸炎 、異體移植 、牛皮癬 、腫瘤和幾種硬皮病等疾病中都檢測出 IL-17A 表達水平的提高 。IL-17A 調節通

路在關節軟骨 、骨 、半月板 、腦 、造血組織 、腎 、肺 、皮膚和腸中都起著重要的作用 ，表明 IL-17 在這類組織中不僅是免疫作用 ，而且在

該類組織的正常和病態的平衡間扮演一個重要的作用 。

檢測原理:

本試劑盒采用雙抗體夾心ELISA法檢測樣本中大鼠IL-17A的濃度 。大鼠IL-17A捕獲抗體已預包被於酶標板上 ，當加入標本或參考品時 ，

其中的大鼠IL-17A會與捕獲抗體結合 ，其它遊離的成分通過洗滌的過程被除去 。當加入生物素化的抗大鼠IL-17A抗體後 ，抗大鼠IL-17A抗

體與大鼠IL-17A接合 ，形成夾心的免疫複合物 ，其它遊離的成分通過洗滌的過程被除去 。隨後加入辣根過氧化物酶標記的親合素 。生物素

與親合素特異性結合 ，親合素連接的酶就會與夾心的免疫複合物連接起來 ；其它遊離的成分通過洗滌的過程被除去 。最後加入顯色劑 ，若

樣本中存在IL-17A將會形成免疫複合物 ，辣根過氧化物酶會催化無色的顯色劑氧化成藍色物質 ，在加入終止液後呈黃色 。通過酶標儀檢測 ，

讀其450nm處的OD值 ，大鼠IL-17A濃度與OD450值之間呈正比 ，通過參考品繪製標準曲線 ，對照未知樣本中OD值 ，即可算出標本中大鼠IL-17A

濃度 。

大鼠IL-17A定量分析酶聯免疫檢測試劑盒組成:

組分 規格（96T/48T）

大鼠IL-17A預包被板 12條/6條

樣本分析緩衝液 5ml/3ml

標準品稀釋液 10ml/5ml

大鼠IL-17A標準品 2支/1支(凍幹)*

大鼠IL-17A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

說明書 1份

標本收集:

1.標本的收集請按下列流程進行操作 ；

A.細胞上清標本離心去除懸浮物後即可 ；

B.血清標本應是自然凝固後 ，取上清 ，避免在冰箱中凝固血液 ；

C.血漿標本 ，推薦用EDTA的方法收集；

D.若待測樣本不能及時檢測 ，標本收集後請分裝 ，凍存於 -20℃ ，避免反複凍融 。

2.血清標本不應添加任何防腐劑或抗凝劑 ；3.標本應清澈透明 ，檢測前樣本中如有懸浮物應通過離心去除 。

4.請勿使用溶血 ，高血脂或汙染的標本檢測 ，否則結果將不準確 。

注 ：大鼠血清或血漿樣本請用樣本分析緩衝液做倍比稀釋後再檢測 。

注意事項:

1.試劑盒請保存在2～8℃ 。

2.濃縮洗滌液因在低溫下可能有結晶 ，請水浴加熱使結晶完全溶解後再配製工作液。

3.標準品複溶加樣後 ，剩餘部份請丟棄 。

4.底物請勿接觸氧化劑和金屬 。

5.加樣時 ，請及時更換槍頭 ，避免交叉汙染 。

6.嚴禁混用不同批號的試劑盒組份 。

7.充分混勻對保證反應結果的準性很重要 ，在加液後請輕輕叩擊邊緣以保證混勻 。

8.室溫反應 ，請嚴格控製在25-28℃ 。

9.洗滌過程是至關重要的 ，洗滌不充分會使精確度下降並導致結果誤差較大 。

10.試驗中標準品和樣本檢測時建議作雙複孔 。

11.加樣過程中避免氣泡的產生 。

12.血清和血漿標本的檢測時 ，檢測抗體的孵育時間應適當延長 。

檢測前準備工作:

1.試劑盒自冰箱中取出後應置室溫（25～28℃）平衡20分鍾 ；每次檢測後剩餘試劑請及時於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準品稀釋液 ，請按所需量用雙蒸水或去離子水稀釋(1份加4水)。

4.標準品: 按標簽複溶體積加入標準品稀釋液複溶使IL-17A終濃度達到200pg/ml ，室溫反應 ，請嚴格控製在25～28℃ ，靜置10~15分鍾後輕

輕混懸（建議抽吸幾次）待徹底溶解 ，用標準品稀釋液倍比梯度稀釋後依次加入檢測孔中 。（標準曲線取七個點 ，最高濃度為200 pg/ml,

標準品稀釋液直接加入作為0濃度.）

洗滌方法:

自動洗板機或人工洗板 ：每孔洗滌液為300ul ，注入與吸出間隔15-30秒 。洗板5次 。最後一次洗板完成後將板倒扣著在厚吸水紙上用力拍幹 。

實驗過程需自備的材料 ：

1.不同規格的加樣槍及相應的槍頭 ；

2.酶標儀 ；

3.自動洗板機 ；

4.去離子水或雙蒸水 ；

操作步驟:

1.通過計算並確定一次性實驗所需的板條數 ，取出所需板條放置在框架內 ，暫時用不到板條請放回鋁箔袋密封 ，保存於4℃ 。

2.建議設置本底較正孔 ，即空白孔,設置方法為該孔隻加TMB顯色液和中止液 。每次實驗均需做標準品對照並畫出標準曲線 。

3.分別將標本或不同濃度標準品(100ul/孔)加入相應孔中 ，用封板膠紙封住反應孔 ，室溫（25～28℃）孵育120分鍾 。對於血清或血漿標本 ，

請加入50 ul樣本分析緩衝液後加50 ul標本, 如稀釋量大 ，請將樣本與樣本分析緩衝液等量加入 ，不足部分用標準品稀釋液補充至100ul 。

4.洗板5次 ，且最後一次置厚吸水紙上拍幹 。

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

6.洗板5次 ，且最後一次置厚吸水紙上拍幹 。

上海尊龍凱時生物科技有限公司 www.ruianjituan.com大鼠IL－17A標準曲線

0

0.5

1

1.5

2

2.5

3

0 6.25 12.5 2 5 5 0 100 200

大鼠IL－17A濃度（pg/ml)

O

D值

上海尊龍凱時生物科技有限公司 www.ruianjituan.com

7.加入親和素鏈接的HRP酶工作液(100ul/孔) 。用封板膠紙封住反應孔 ，避光室溫（25～28℃）孵育20分鍾 。

8.洗板5次 ，且最後一次置厚吸水紙上拍幹 。

9.加入顯色劑TMB100ul/孔 ，避光室溫（25～28℃）孵育20分鍾 。

10.加入終止液50ul/孔,混勻後即刻測量OD450值 。

結果判斷:

1.複孔的值在20%的差異範圍內結果才有效 ，複孔的值平均後可作為測量值 。

2.每個標準品或標本的OD值應減去本底校正孔的OD值 。

3.手工繪製標準曲線 。以標準品濃度作橫坐標 ，OD值作縱坐標 ，以平滑線連接各標準品的坐標點 。通過標本的OD值可在標準曲線上查出其

濃度 。

4.若標本OD值高於標準曲線上限 ，應適當稀釋後重測 ，計算濃度時應乘以稀釋倍數。

典型數值和參考曲線

濃度pg/ml 典型OD值1 典型OD值2 OD平均值

0 0.0794 0.0572 0.0683

6.25 0.2266 0.2164 0.2215

12.5 0.4545 0.4281 0.4413

25 0.8205 0.7765 0.7985

50 1.2664 1.2276 1.247

100 1.9165 1.8749 1.8957

200 2.7498 2.7162 2.733

大鼠 IL-17A 參考標準曲線

注意 ：本圖僅供參考 ，應以同次試驗標準品所繪標準曲線計算標本含量 。

靈敏度 ，特異性和重複性:

1.靈敏度 ：多次重複結果表明 ，最小檢出量為1.8pg/ml 。

2.特異性 ：與人IFN-γ 和大鼠IFN-γ 沒有交叉反應 。

3.重複性 ：板內 ，板間變異係數均<10%.

參考文獻 ：

uziel and Greene, 1990 J. Invest. Dermatol., 94:275

Parkinson et al., 1988 J. Immunol. Methods, 15:105上海尊龍凱時生物科技有限公司 www.ruianjituan.com

ELISA Kit for the Quantitative Analysis of Rat IL-17A

The rat IL-17A ELISA (enzyme-linked immunosorbent assay) kit is used for detection of rat IL-17A in cell culture supernatants, rat

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

A new family of cytokines, Interleukin-17, which is a disulfide-linked homodimer and each polypeptide has 155 amino acid (aa)

residues with an apparent molecular mass of 17.5 kDa. Interleukin-17 has six IL-17a family members (IL-17A-F), IL-17A, a homodimeric

cytokine of about 32 kDa, is largely produced by activated memory T lymphocytes, stimulates innate immunity and host defense.

There is high evidence for IL-17A in the regulation of immune responses. IL-17A mediation of T cell communication with the

hematopoietic system be proved. T cell-derived IL-17A induces fibroblasts to produce IL-6, IL-8, ICAM-1 and G-CSF, apparently by an

NF-κ B-mediated mechanism . IL-17A also enhances proliferation of partially activated T cells and upregulates nitric oxide (NO)

production in osteoarthritic cartilage .

Recent studies shows that IL-17A family members play an active role in inflammatory diseases, autoimmune diseases, and cancer.

Increased levels of IL-17A have been associated with several diseases, including airway inflammation, rheumatoid arthritis,

intraperitoneal abscesses and adhesions, inflammatory bowel disease, allograft rejection, psoriasis, cancer and multiple sclerosis.

The IL-17A signaling system is operative in articular cartilage, bone, meniscus, brain, hematopoietic tissue, kidney, lung, skin and

intestine. Which showed that IL-17A may play an important role in the homeostasis of tissues in health and disease beyond the immune

system.

Principles of the Test

The kits is a solid sandwich enzyme-linked immunosorbent assay for detection of rat IL-17A. An anti-rat IL-17A monoclonal antibody

has been absorbed onto the wells of the microtiter strips provided. Samples including specimens or standards were pipetted into wells.

The rat IL-17A in specimens or standards would be captured by the coated antibody and the free others were removed by washing. The

rat IL-17A biotin-conjugated antibody were added and binds to rat IL-17A 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 rat IL-17A in the original specimen.

Materials provided with the kits:

reagent 96/48Test Kit

Assay Buffer 5ml/3ml

Rat IL-17A Antibody-Coated Wells 12 strips/6 strips

Standard Diluent 10ml/5ml

Rat IL-17A Standard 2/1vial(s)

Rat IL-17A 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 be25-28℃.

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. 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 into300ul 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 80 minutes at room temperature If assay the serum

sample,you should add 50μ l assay buffer with 50μ l sample into the wells,if the protein concentration is higher than the range of the Kit,

add the same quantitys assay buffer with the sample, the deficiency should be complemented with sample diluent to 100μ l per well.

4.Five times wash process were repeated.

5.Add 100ul of detetion antibody. Cover with the Plate Covers provided.Incubate for 100 minutes 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.

Calculation of Results

1.Duplicates should be within 20 per cent 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

concentration

(pg/ml)

Typical data 1 Typical data

2

Average

0 0.0794 0.0572 0.0683

6.25 0.2266 0.2164 0.2215

12.5 0.4545 0.4281 0.4413

25 0.8205 0.7765 0.7985

50 1.2664 1.2276 1.247

100 1.9165 1.8749 1.8957

200 2.7498 2.7162 2.733

Rat IL-17A standard Curve

Sensitivity, specificity, Repeatability

Sensitivity: repeated assays were evalsuated and the minimum detectable dose was 1.8pg/ml.

Specificity : No significant cross-reactivity or interference with human IFN-γ and rat IFN-γ .

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

REFERENCES:

uziel and Greene, 1990 J. Invest. Dermatol., 94:275

Parkinson et al., 1988 J. Immunol. Methods, 15:105