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胃蛋白酶(PP)檢測試劑盒(酶聯(lián)免疫吸附試驗法,快捷型)

Instant ELISA Kit for Pepsin (PP)

  • 胃蛋白酶(PP)檢測試劑盒(酶聯(lián)免疫吸附試驗法,快捷型) 產(chǎn)品包裝(模擬)
  • 胃蛋白酶(PP)檢測試劑盒(酶聯(lián)免疫吸附試驗法,快捷型) 產(chǎn)品包裝(模擬)
  • 胃蛋白酶(PP)檢測試劑盒(酶聯(lián)免疫吸附試驗法,快捷型) 實驗結(jié)果圖
  • IEA632Hu.jpg 標(biāo)準(zhǔn)曲線圖
  • Certificate 通過ISO 9001、ISO 13485質(zhì)量體系認(rèn)證

特異性

本試劑盒用于檢測胃蛋白酶(PP)檢測試劑盒(酶聯(lián)免疫吸附試驗法,快捷型),經(jīng)檢測與其它相似物質(zhì)無明顯交叉反應(yīng)。
由于受到技術(shù)及樣本來源的限制,不可能完成對所有相關(guān)或相似物質(zhì)交叉反應(yīng)檢測,因此本試劑盒有可能與未經(jīng)檢測的其它物質(zhì)有交叉反應(yīng)。

回收率

分別于定值血清及血漿樣本中加入一定量的胃蛋白酶(PP)檢測試劑盒(酶聯(lián)免疫吸附試驗法,快捷型)(加標(biāo)樣品),重復(fù)測定并計算其均值,回收率為測定值與理論值的比率。

樣本 回收率范圍(%) 平均回收率(%)
serum(n=5) 94-105 98
EDTA plasma(n=5) 84-98 93
heparin plasma(n=5) 93-101 96

精密度

精密度用樣品測定值的變異系數(shù)CV表示。CV(%) = SD/mean×100
批內(nèi)差:取同批次試劑盒對低、中、高值定值樣本進行定量檢測,每份樣本連續(xù)測定20 次,分別計算不同濃度樣本的平均值及SD值。
批間差:選取3個不同批次的試劑盒分別對低、中、高值定值樣本進行定量測定,每個樣本使用同一試劑盒重復(fù)測定8次,分別計算不同濃度樣本的平均值及SD值。
批內(nèi)差: CV<10%
批間差: CV<12%

線性

在定值血清及血漿樣本內(nèi)加入適量的胃蛋白酶(PP)檢測試劑盒(酶聯(lián)免疫吸附試驗法,快捷型),并倍比稀釋成1:2,1:4,1:8,1:16的待測樣本,線性范圍即為稀釋后樣本中胃蛋白酶(PP)檢測試劑盒(酶聯(lián)免疫吸附試驗法,快捷型)含量的測定值與理論值的比率。

樣本 1:2 1:4 1:8 1:16
serum(n=5) 85-99% 93-102% 87-96% 84-96%
EDTA plasma(n=5) 88-98% 78-101% 90-104% 85-99%
heparin plasma(n=5) 81-101% 78-93% 78-93% 84-91%

穩(wěn)定性

經(jīng)測定,試劑盒在有效期內(nèi)按推薦溫度保存,其活性降低率小于5%。
為減小外部因素對試劑盒破壞前后檢測值的影響,實驗室的環(huán)境條件需盡量保持一致,尤其是實驗室內(nèi)溫度、濕度及溫育條件。其次由同一實驗員來進行操作可減少人為誤差。

實驗流程

1. 實驗前標(biāo)準(zhǔn)品、試劑及樣本的準(zhǔn)備;
2. 加樣(標(biāo)準(zhǔn)品及樣本)100µL,37°C溫育30分鐘;
3. 甩干,加檢測溶液A100µL,37°C溫育30分鐘;
4. 洗板3次;
5. 加檢測溶液B100µL, 37°C孵育10分鐘;
6. 洗板5次;
7. 加TMB底物90µL,37°C孵育10-20分鐘;
8. 加終止液50µL,立即450nm讀數(shù)。

實驗原理

本試劑盒應(yīng)用競爭抑制酶聯(lián)免疫分析法測定標(biāo)本中待測物質(zhì)水平。將胃蛋白酶(PP)檢測試劑盒(酶聯(lián)免疫吸附試驗法,快捷型)單克隆抗體包被微孔板,制成固相載體,往包被抗體的微孔中同時加入生物素標(biāo)記的抗原和待測抗原(標(biāo)準(zhǔn)品或樣本),待測抗原與生物素標(biāo)記抗原對特異性抗體進行競爭結(jié)合。溫育后經(jīng)洗滌去掉未結(jié)合物,然后加入HRP標(biāo)記的親和素,經(jīng)過溫育和徹底洗滌后加入底物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)化成最終的黃色。待測標(biāo)本濃度越高,標(biāo)記抗原和抗體的結(jié)合就越受到抑制,顯色愈淺。顯色的深淺與酶量呈正相關(guān),而與樣品中待測物質(zhì)含量呈負(fù)相關(guān)。用酶標(biāo)儀在450nm波長下測定吸光度(O.D.值),計算樣品濃度。

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編號 適用物種:Homo sapiens (Human,人) 應(yīng)用(僅供研究使用,不用于臨床診斷!)
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參考文獻(xiàn)

雜志 參考文獻(xiàn)
Radiology and Oncology LEVEL OF PEPSIN AND BILE ACIDS IN THE SALIVA OF PATIENTS WITH GLOTTIS T1 CARCINOMA [Szd:Source]
Radiology and Oncology Higher levels of total pepsin and bile acids in the saliva as a possible risk factor for early laryngeal cancer [Pubmed:Pmc4362607]
Clin Otolaryngol Pepsin and bile acids in saliva in patients with laryngopharyngeal reflux – a prospective comparative study [PubMed: 25516364]
journal of pediatric gastroenterology and nutrition Does Positioning Affect Tracheal Aspiration of Gastric Content in Ventilated Infants? [PubMed: 25313850]
Journal of Voice Detecting Laryngopharyngeal Reflux by Immunohistochemistry of Pepsin in the Biopsies of Vocal Fold Leukoplakia [pubmed:28756936]
Sensors (Basel) Label-Free Detection of Salivary Pepsin Using Gold Nanoparticle/Polypyrrole Nanocoral Modified Screen-Printed Electrode [Pubmed:29882917]
The Tohoku Journal of Experimental Medicine Association between Pepsin in Bronchoalveolar Lavage Fluid and Prognosis of Chronic Fibrosing Interstitial Lung Disease []
Respiratory?Research Pulmonary aspiration in preschool children with cystic fibrosis [Pubmed: 30558606]
Tanaffos Association of Bile Acid and Pepsin Micro-aspiration with Chronic Obstructive Pulmonary Disease Exacerbation [Pubmed: 31423141]
Sensors Optimization of Saliva Collection and Immunochromatographic Detection of Salivary Pepsin for Point-of-Care Testing of Laryngopharyngeal Reflux [Pubmed: 31935973]
BIOSCIENCE REPORTS Presence of pepsin in laryngeal tissue and saliva in benign and malignant neoplasms [Pubmed: 33103719]
OTOLARYNGOLOGY-HEAD AND NECK SURGERY Relationship Between Pepsin Expression and Dysplasia Grade in Patients With Vocal Cord Leukoplakia [Pubmed: 32692278]
American Journal of Otolaryngology Association of pepsin and DNA damage in laryngopharyngeal reflux-related vocal fold polyps [Pubmed: 32889371]
The relationship between laryngopharyngeal reflux based on pepsin value and clinical characteristics of laryngeal cancer patients []
Med Sci Monit The Role of Salivary Pepsin in the Diagnosis of Gastroesophageal Reflux Disease (GERD) Evaluated Using High-Resolution Manometry and 24-Hour??- [33220027]
Annals of Esophagus Pepsin properties, structure, and its accurate measurement: a narrative review []
Laryngoscope The Impact of Laryngopharyngeal Reflux on Occurrence and Clinical Course of Recurrent Respiratory Papillomatosis [34338331]
Pulmonology Bronchoalveolar lavage (BAL) amylase and pepsin levels as potential biomarkers of aspiration pneumonia [Pubmed:35715334]
Neuromodulation: Technology at the Neural Interface Transcutaneous Electrical Acustimulation Improved the Quality of Life in Patients With Diarrhea-Irritable Bowel Syndrome [Pubmed:35088760]
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